UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-21213 --------------------- Nuveen Insured Tax-Free Advantage Municipal Fund ------------------------------------------------------------------------------ (Exact name of registrant as specified in charter) Nuveen Investments 333 West Wacker Drive Chicago, IL 60606 ------------------------------------------------------------------------------ (Address of principal executive offices) (Zip code) Jessica R. Droeger Nuveen Investments 333 West Wacker Drive Chicago, IL 60606 ------------------------------------------------------------------------------ (Name and address of agent for service) Registrant's telephone number, including area code: (312) 917-7700 ------------------- Date of fiscal year end: October 31 ------------------ Date of reporting period: April 30, 2006 ------------------ Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO STOCKHOLDERS. SEMIANNUAL REPORT April 30, 2006 Nuveen Investments Municipal Exchange-Traded Closed-End Funds NUVEEN INSURED QUALITY MUNICIPAL FUND, INC. NQI NUVEEN INSURED MUNICIPAL OPPORTUNITY FUND, INC. NIO NUVEEN PREMIER INSURED MUNICIPAL INCOME FUND, INC. NIF NUVEEN INSURED PREMIUM INCOME MUNICIPAL FUND 2 NPX NUVEEN INSURED DIVIDEND ADVANTAGE MUNICIPAL FUND NVG NUVEEN INSURED TAX-FREE ADVANTAGE MUNICIPAL FUND NEA Photo of: Man, woman and child at the beach. Photo of: A child. DEPENDABLE, TAX-FREE INCOME BECAUSE IT'S NOT WHAT YOU EARN, IT'S WHAT YOU KEEP.(R) Logo: NUVEEN Investments Photo of: Woman Photo of: Man and child Photo of: Woman NOW YOU CAN RECEIVE YOUR NUVEEN FUND REPORTS FASTER. NO MORE WAITING. SIGN UP TODAY TO RECEIVE NUVEEN FUND INFORMATION BY E-MAIL. It only takes a minute to sign up for E-Reports. Once enrolled, you'll receive an e-mail as soon as your Nuveen Investments Fund information is ready -- no more waiting for delivery by regular mail. Just click on the link within the e-mail to see the report, and save it on your computer if you wish. ------------------------ DELIVERY DIRECT TO YOUR E-MAIL INBOX ------------------------ IT'S FAST, EASY & FREE: WWW.INVESTORDELIVERY.COM if you get your Nuveen Fund dividends and statements from your financial advisor or brokerage account. OR WWW.NUVEEN.COM/ACCOUNTACCESS if you get your Nuveen Fund dividends and statements directly from Nuveen. (Be sure to have the address sheet that accompanied this report handy. You'll need it to complete the enrollment process.) Logo: NUVEEN Investments Photo: Timothy R. Schwertfeger Timothy R. Schwertfeger Chairman of the Board Chairman's LETTER TO SHAREHOLDERS Once again, I am pleased to report that over the six-month period covered by this report your Fund continued to provide you with attractive monthly tax-free income. For more details about the management strategy and performance of your Fund, please read the Portfolio Manager's Comments, the Dividend and Share Price Information, and the Performance Overview sections of this report. "PORTFOLIO DIVERSIFICATION IS A RECOGNIZED WAY TO TRY TO REDUCE SOME OF THE RISK THAT COMES WITH INVESTING." Municipal bonds can be an important building block in a well balanced investment portfolio. In addition to providing attractive tax-free monthly income, a municipal bond investment like your Fund may help you achieve and benefit from greater portfolio diversification. Portfolio diversification is a recognized way to try to reduce some of the risk that comes with investing. I encourage you to contact your personal financial advisor who may help explain this important investment strategy. Nuveen Investments is pleased to offer you choices when it comes to receiving your fund reports. In addition to mailed print copies, you can also sign up to receive future Fund reports and other Fund information by e-mail and the Internet. Not only will you receive the information faster, but this also may help lower your Fund's expenses. The inside front cover of this report contains information on how you can sign up. We are grateful that you have chosen us as a partner as you pursue your financial goals, and we look forward to continuing to earn your trust in the months and years ahead. At Nuveen Investments, our mission continues to be to assist you and your financial advisor by offering investment services and products that can help you to secure your financial objectives. Sincerely, /s/ Timothy R. Schwertfeger Timothy R. Schwertfeger Chairman of the Board June 12, 2006 Nuveen Investments Municipal Exchange-Traded Closed-End Funds NQI, NIO, NIF, NPX, NVG, NEA Portfolio Manager's COMMENTS Portfolio manager Dan Solender reviews key investment strategies and the six-month performance of these six insured Funds. With 19 years of investment experience, including 10 at Nuveen, Dan has managed NQI, NIO, NIF, NPX, NVG, and NEA since 2004. WHAT KEY STRATEGIES WERE USED TO MANAGE THESE FUNDS DURING THE SIX MONTHS ENDED APRIL 30, 2006? During this reporting period, we saw a general increase in interest rates, although rates at the longer end of the yield curve remained more stable than those at the short end throughout much of the period. Between November 1, 2005 and April 30, 2006, the Federal Reserve implemented four increases of 0.25% each in the fed funds rate, raising this short-term target by 100 basis points--from 3.75% to 4.75%. (On May 10, 2006, the fed funds rate was increased by another 25 basis points to 5%, marking the Fed's 16th consecutive quarter-point hike since June 2004.) In contrast, the yield on the benchmark 10-year U.S. Treasury note ended April 2006 at 5.06%, up from 4.55% six months earlier, while the yield on the Bond Buyer 25 Revenue Bond Index, a widely followed measure of longer-term municipal market rates, was 5.22% at the end of April 2006, an increase of just two basis points from the beginning of November 2005. As interest rates increased, bond valuations generally declined, and the yield curve flattened as short-term rates approached the levels of longer-term rates. In this environment, one of our key strategies continued to be careful duration1 management, part of which included efforts to more closely align the duration and yield curve positioning of these Funds. In general, our purchase activity targeted attractively priced bonds maturing in 15 to 20 years. We believed that bonds in this part of the curve generally offered better value and reward opportunities more commensurate with their risk levels. As the yield curve continued to flatten, we started to see more opportunities to add value at the longer end of the curve, and we began to move our purchases out to bonds in the 20-year to 25-year range. To help us maintain the Funds' durations within our preferred strategic range, we were also selectively selling holdings with shorter durations. Selling these shorter duration bonds and reinvesting further out on the yield curve also helped to improve the Funds' overall call protection profile. As yields rose during this period, we also found some opportunities to sell a few of our holdings that were purchased when yields were lower and replace them with similar, 1 Duration is a measure of a bond's price sensitivity as interest rates change, with longer duration bonds displaying more sensitivity to these changes than bonds with shorter durations. 4 newer credits that yielded comparatively more. This process allowed us to maintain the Funds' current portfolio characteristics while strengthening their income streams. It also enabled us to realize some capital losses that can be used to offset any capital gains realized in 2006 or carried forward to offset future realized gains. In looking for potential purchase candidates, we kept an opportunistic eye toward all types of issuance that we believed could add value to the Funds' portfolios and keep the Funds well diversified geographically. Overall, portfolio activity was relatively light during this period. This was due in part to the fact that these Funds entered the reporting period fully invested and with routine call exposure. Another factor was the 5.5% decline in municipal supply during this six-month period compared with the same period 12 months earlier (November 2004-April 2005). The decrease in supply was even more evident during the first four months of 2006, when new issuance dropped almost 25% from the levels of January-April 2005. For NVG and NEA, which can invest up to 20% of their portfolio in uninsured investment-grade quality securities, tighter supply and declining relative valuations also meant fewer opportunities to find lower-rated issues that we believed represented value for shareholders or improved the structure of these two Funds. Given the tightness of spreads in all parts of the municipal market, we continued to purchase paper issued in specialty states such as California and New York when we found attractively priced opportunities. Because of the relatively higher tax levels in of these specialty states, municipal bonds issued in these states are generally in great demand by retail investors, which helps to support their value. They also provide additional liquidity, making it easier for us to execute trades as part of implementing our strategies. In NEA, our duration management strategies also included the use of forward interest rate swaps, a type of derivative financial instrument. As discussed in our last shareholder report, we began using these swaps in late 2004 in an effort to reduce the interest rate risk in this Fund. These hedges were not an attempt to profit from correctly predicting the timing and direction of interest rate movements. Instead, our sole objective was to reduce NEA's duration (and resulting pricing sensitivity) without having a negative impact on its income stream or common share dividends over the short term. We believe the hedging strategy has been effective in helping to reduce NEA's net asset value (NAV) 5 volatility, and the hedge on this Fund remained in place as of April 30, 2006. During this reporting period, the hedge performed as expected and had a positive impact on the performance of NEA. As long-term interest rates rose, the value of the hedge increased while the valuation of the Fund's holdings generally declined. HOW DID THE FUNDS PERFORM? Individual results for these Funds, as well as relevant benchmark and peer group information, are presented in the accompanying table. TOTAL RETURNS ON NET ASSET VALUE* For periods ended 4/30/06 6-MONTH 1-YEAR 5-YEAR 10-YEAR -------------------------------------------------------------------------------- NQI 1.41% 1.91% 6.95% 6.50% -------------------------------------------------------------------------------- NIO 1.79% 1.51% 6.92% 6.49% -------------------------------------------------------------------------------- NIF 1.11% 1.04% 6.67% 6.19% -------------------------------------------------------------------------------- NPX 1.55% 1.42% 6.71% 6.68% -------------------------------------------------------------------------------- NVG 2.19% 2.33% NA NA -------------------------------------------------------------------------------- NEA 2.49% 2.51% NA NA -------------------------------------------------------------------------------- Lehman Brothers Insured Municipal Bond Index2 1.69% 2.10% 5.66% 6.09% -------------------------------------------------------------------------------- Lipper Insured Municipal Debt Funds Average3 1.94% 2.24% 6.27% 6.21% -------------------------------------------------------------------------------- * Six-month returns are cumulative; returns for one year, five years, and ten years are annualized. Past performance is not predictive of future results. Current performance may be higher or lower than the data shown. Returns do not reflect the deduction of taxes that shareholders may have to pay on Fund distributions or upon the sale of Fund shares. For additional information, see the individual Performance Overview for your Fund in this report. For the six months ended April 30, 2006, the cumulative returns on NAV for NIO, NVG, and NEA exceeded the return on their Lehman Brothers insured municipal benchmark, while NQI, NIF and NPX underperformed the index. NVG and NEA also outperformed the average return for their Lipper insured peer group, while the other four Funds underperformed the Lipper peer group for the period. One of the factors affecting the six-month performance of these Funds relative to that of the unleveraged Lehman Brothers Insured Municipal Bond Index was the Funds' use of financial leverage. While leveraging can add volatility to a Fund's NAV and share price, this strategy can also provide opportunities for additional income and total return for 2 The Lehman Brothers Insured Municipal Bond Index is an unleveraged, unmanaged national index comprising a broad range of insured municipal bonds. Results for the Lehman index do not reflect any expenses. 3 The Lipper Insured Municipal Debt Funds category average is calculated using the returns of all closed-end exchange-traded funds in this category for each period as follows: 6 months, 26; 1 year, 26; 5 years, 21; and 10 years, 18. Fund and Lipper returns assume reinvestment of dividends. 6 common shareholders. The benefits of leveraging are tied in part to the short-term rates leveraged Funds pay their MuniPreferred(R) shareholders. During periods of low short-term rates, leveraged Funds generally pay lower dividends to their MuniPreferred shareholders, which can leave more earnings to support common share dividends. Conversely, when short-term interest rates rise, as they did during this reporting period, the Funds' borrowing costs also rise, which can impact the Funds' income streams and total returns. However, as long as short-term yields are lower than those of the long-term bonds in the Funds' portfolios, the income received by the common shareholders of leveraged Funds will be higher than it would be if the Funds were unleveraged. Despite the impact of rising interest rates on bond valuations, the extra income, or yield advantage, resulting from leveraging during this period remained strong enough to help the Funds post positive results for this six months. Over the long term, we believe the use of financial leverage will continue to work to the benefit of the Funds, as demonstrated by the five-year and ten-year return performance--both absolute and relative--of the Funds in this report. During this reporting period, positive contributors to the Funds' returns included yield curve and duration positioning, exposure to noninsured credits in NVG and NEA, and pre-refunding activity. As mentioned earlier, the hedging strategies we employed in NEA also had a positive impact on the performance of this Fund for the period. As the yield curve continued to flatten over the course of this period, yield curve and duration positioning played important roles in the Funds' performances. On the whole, shorter maturity bonds were the most impacted by recent changes in the yield curve. As a result, these bonds generally underperformed both intermediate and long bonds, with credits having the longest durations posting the best returns for this period. Yield curve positioning or, more specifically, greater exposure to those parts of the yield curve that performed well helped performance during this period, while exposure to the short end of the curve hurt performance. This was especially true in NIF, which had relatively heavier weightings of pre-refunded bonds and premium credits with short calls, which were adversely affected by rising short-term rates. Conversely, NVG and NEA, which were established in 2002, were more advantageously positioned on the curve, with less exposure to bonds with maturities of 10 years or less. As previously mentioned, we continued to work to more closely align the yield curve positioning of all of these Funds. 7 NEA, which can invest up to 20% of its portfolio in uninsured investment-grade quality securities, also benefited from its allocations of lower-quality credits during this period, as these bonds generally outperformed other credit quality sectors. This was largely the result of investor demand for the higher yields typically associated with lower-quality bonds, which drove up their value and kept credit spreads narrow. As of April 30, 2006, NEA held 2% of its portfolio in bonds rated BBB, 3% in bonds in bonds rated A, and 3% in bonds rated AA. NVG, which also can invest in uninsured securities, held 5% of its portfolio in bonds rated AA, but did not hold any bonds rated below AA as of the end of this period. We also continued to see a number of advance refundings4 during this period, which benefited the Funds through price appreciation and enhanced credit quality. However, as the yield curve flattened, more lower coupon bonds were being pre-refunded, which meant that, in general, the positive impact from refinancings was less than in the previous reporting period. While advance refundings generally enhanced total return performance for this six-month period, the rising interest rate environment--especially at the short end of the yield curve--meant that the Funds' holdings of older, previously pre-refunded bonds tended to underperform the general municipal market, due primarily to the shorter effective maturities of these bonds. This was especially true in the four older Funds (NQI, NIO, NIF, and NPX). Because these pre-refunded bonds tended to produce strong income, we continued to hold them in our portfolios. NQI, NIF, and NPX also experienced some calls affecting their holdings of higher-yielding housing bonds, which impacted the income component of these Funds' total returns. This had an adverse effect on their six-month performance. 4 Advance refundings, also known as pre-refundings or refinancings, occur when an issuer sells new bonds and uses the proceeds to fund principal and interest payments of older existing bonds. This process often results in lower borrowing costs for bond issuers. 8 HOW WERE THE FUNDS POSITIONED IN TERMS OF CREDIT QUALITY AND BOND CALLS AS OF APRIL 30, 2006? We continued to believe that maintaining strong credit quality was an important requirement. As of April 30, 2006, NQI, NIO, NIF, and NPX continued to be 100% invested in insured and/or U.S. guaranteed securities, while NVG and NEA, which can invest up to 20% of their portfolio in uninsured investment-grade quality securities, had allocated 93% and 89% of their portfolios, respectively, to insured and U.S. guaranteed bonds. At the end of April 2006, potential call exposure for the period May 2006 through the end of 2007 ranged from 3% in NEA, NVG and NIF to 8% in NPX and NQI, and 10% in NIO. The number of actual bond calls in all of these Funds depends largely on future market interest rates. 9 Dividend and Share Price INFORMATION As previously noted, all of the Funds in this report use leverage to potentially enhance opportunities for additional income for common shareholders. During periods of rising short-term interest rates, as was the case during this reporting period, the Funds' borrowing costs also rise, reducing the extent of the benefits of leveraging. This resulted in one monthly dividend reduction in NIO and NIF and two in NQI and NPX over the six-month period ended April 30, 2006. The dividends of NVG and NEA remained stable throughout the reporting period. Due to capital gains generated by normal portfolio activity, common shareholders of the following Funds received capital gains and net ordinary income distributions at the end of December 2005, as follows: LONG-TERM CAPITAL GAINS ORDINARY INCOME (PER SHARE) (PER SHARE) -------------------------------------------------------------------------------- NQI $0.0775 -- -------------------------------------------------------------------------------- NIO $0.1394 $0.0004 -------------------------------------------------------------------------------- NIF $0.0955 -- -------------------------------------------------------------------------------- These distributions, which represented an important part of the total returns of these three Funds for this period, were generated by bond calls or by sales of appreciated securities. This had a slight negative impact on the Funds' earning power per common share and was a minor factor in the common share dividend reductions noted above. All of the Funds in this report seek to pay stable dividends at rates that reflect each Fund's past results and projected future performance. During certain periods, each Fund may pay dividends at a rate that may be more or less than the amount of net investment income actually earned by the Fund during the period. If a Fund has cumulatively earned more than it has paid in dividends, it holds the excess in reserve as undistributed net investment income (UNII) as part of the Fund's NAV. Conversely, if a Fund has cumulatively paid dividends in excess of its earnings, the excess constitutes negative UNII that is likewise reflected in the Fund's NAV. Each Fund will, over time, pay all of its net investment income as dividends to shareholders. As of April 30, 2006, all of the Funds in this report except NEA had a positive UNII balance for financial statement purposes and a positive UNII balance, based upon our best estimate, for tax purposes. NEA had a negative UNII balance for financial statement purposes and a positive UNII balance, based upon our best estimate, for tax purposes. 10 At the end of the reporting period, the Funds' share prices were trading at discounts to their NAVs as shown in the accompanying chart: 4/30/06 6-MONTH DISCOUNT AVERAGE DISCOUNT -------------------------------------------------------------------------------- NQI -3.19% -2.45% -------------------------------------------------------------------------------- NIO -4.02% -4.78% -------------------------------------------------------------------------------- NIF -3.73% -4.79% -------------------------------------------------------------------------------- NPX -8.19% -8.33% -------------------------------------------------------------------------------- NVG -0.26% -4.63% -------------------------------------------------------------------------------- NEA -5.77% -7.61% -------------------------------------------------------------------------------- 11 Nuveen Insured Quality Municipal Fund, Inc. NQI Performance OVERVIEW As of April 30, 2006 Pie Chart: CREDIT QUALITY (as a % of total investments) Insured 87% U.S. Guaranteed 13% Bar Chart: 2005-2006 MONTHLY TAX-FREE DIVIDENDS PER SHARE2 May 0.0815 Jun 0.0775 Jul 0.0775 Aug 0.0775 Sep 0.074 Oct 0.074 Nov 0.074 Dec 0.0705 Jan 0.0705 Feb 0.0705 Mar 0.067 Apr 0.067 Line Chart: SHARE PRICE PERFORMANCE Weekly Closing Price Past performance is not predictive of future results. 5/01/05 15.42 15.51 15.5 15.61 15.42 15.4 15.62 15.52 15.64 15.65 15.65 15.63 15.77 15.76 15.77 15.72 15.8 15.75 15.84 15.9 15.96 16.01 16.02 16.1 16.02 15.91 15.99 15.99 15.96 15.76 15.76 15.93 15.94 15.91 15.9 16.01 16.05 16.14 16.22 16.16 16.09 16.08 16.07 16.03 16.1 16.19 16.2 16.21 16.34 16.4 16.42 16.47 16.36 16.17 16.07 16.08 15.94 15.96 15.79 15.8 15.88 15.85 15.91 15.91 15.73 15.75 15.79 15.74 15.62 15.57 15.45 15.57 15.53 15.55 15.57 15.63 15.63 15.64 15.67 15.68 15.7 15.66 15.59 15.6 15.6 15.7 15.83 15.85 15.93 15.9 15.91 15.9 15.89 15.73 15.66 15.68 15.6 15.56 15.58 15.61 15.62 15.55 15.5 15.55 15.38 15.45 15.59 15.58 15.6 15.63 15.6 15.65 15.59 15.54 15.59 15.59 15.39 15.34 15.43 15.19 15.3 15.38 15.42 15.44 15.42 15.24 15.46 15.3 15.31 15.33 15.38 15.39 15.31 15.44 15.46 15.32 15.1 15.02 14.97 14.92 14.91 14.89 14.55 14.7 14.62 14.6 14.6 14.74 14.67 14.62 14.76 14.73 14.66 14.71 14.56 14.57 14.55 14.59 14.4 14.35 14.35 14.39 14.38 14.36 14.42 14.42 14.56 14.51 14.6 14.76 14.79 14.79 14.83 14.95 14.96 15 15.07 15.1 15.08 14.97 14.96 15.06 15.09 15.09 15.21 15.34 15.32 15.23 15.33 15.44 15.5 15.61 15.58 15.5 15.34 15.26 15.26 15.25 15.07 15.04 15.01 14.93 14.91 14.98 14.95 15 15.04 15 14.97 15.02 15.09 15 15.06 15.05 14.86 14.75 14.75 14.81 14.88 14.93 14.86 14.85 15.03 15.03 14.96 14.94 14.86 14.94 15 15 14.88 14.96 15 14.99 15.01 14.99 14.91 14.84 14.79 14.68 14.57 14.54 14.55 14.46 14.5 14.51 14.45 14.45 14.51 14.54 14.57 14.56 14.55 4/30/06 14.55 FUND SNAPSHOT ------------------------------------ Common Share Price $14.55 ------------------------------------ Common Share Net Asset Value $15.03 ------------------------------------ Premium/(Discount) to NAV -3.19% ------------------------------------ Market Yield 5.53% ------------------------------------ Taxable-Equivalent Yield1 7.68% ------------------------------------ Net Assets Applicable to Common Shares ($000) $575,498 ------------------------------------ Average Effective Maturity on Securities (Years) 19.38 ------------------------------------ Leverage-Adjusted Duration 8.03 ------------------------------------ AVERAGE ANNUAL TOTAL RETURN (Inception 12/19/90) ------------------------------------ ON SHARE PRICE ON NAV ------------------------------------ 6-Month (Cumulative) -1.76% 1.41% ------------------------------------ 1-Year -0.66% 1.91% ------------------------------------ 5-Year 6.71% 6.95% ------------------------------------ 10-Year 6.37% 6.50% ------------------------------------ STATES (as a % of total investments) ------------------------------------ California 18.9% ------------------------------------ Texas 12.8% ------------------------------------ New York 11.4% ------------------------------------ Illinois 10.0% ------------------------------------ Washington 7.2% ------------------------------------ Florida 5.6% ------------------------------------ Nevada 4.6% ------------------------------------ Hawaii 4.0% ------------------------------------ Kentucky 3.8% ------------------------------------ Pennsylvania 2.0% ------------------------------------ Other 19.7% ------------------------------------ INDUSTRIES (as a % of total investments) ------------------------------------ Transportation 22.3% ------------------------------------ Tax Obligation/Limited 15.1% ------------------------------------ U.S. Guaranteed 13.4% ------------------------------------ Tax Obligation/General 13.0% ------------------------------------ Health Care 12.5% ------------------------------------ Utilities 9.0% ------------------------------------ Water and Sewer 6.1% ------------------------------------ Other 8.6% ------------------------------------ 1 Taxable-Equivalent Yield represents the yield that must be earned on a fully taxable investment, in order to equal the yield of the Fund on an after-tax basis. It is based on a federal income tax rate of 28%. When comparing this Fund to investments that generate qualified dividend income, the Taxable-Equivalent Yield is lower. 2 The Fund paid shareholders a capital gains distribution in December 2005 of $0.0775 per share. 12 Nuveen Insured Municipal Opportunity Fund, Inc. NIO Performance OVERVIEW As of April 30, 2006 Pie Chart: CREDIT QUALITY (as a % of total investments) Insured 77% U.S. Guaranteed 23% Bar Chart: 2005-2006 MONTHLY TAX-FREE DIVIDENDS PER SHARE2 May 0.078 Jun 0.074 Jul 0.074 Aug 0.074 Sep 0.071 Oct 0.071 Nov 0.071 Dec 0.071 Jan 0.071 Feb 0.071 Mar 0.0675 Apr 0.0675 Line Chart: SHARE PRICE PERFORMANCE Weekly Closing Price Past performance is not predictive of future results. 5/01/05 15.1 15.15 15.18 15.27 15.15 15.27 15.29 15.28 15.21 15.28 15.36 15.4 15.42 15.36 15.44 15.54 15.52 15.45 15.44 15.4 15.42 15.42 15.43 15.45 15.48 15.6 15.55 15.51 15.54 15.42 15.43 15.39 15.5 15.46 15.5 15.49 15.6 15.67 15.65 15.62 15.63 15.7 15.6 15.56 15.64 15.69 15.73 15.67 15.65 15.76 15.65 15.62 15.64 15.5 15.59 15.57 15.48 15.46 15.42 15.37 15.49 15.44 15.38 15.38 15.42 15.47 15.5 15.51 15.36 15.34 15.3 15.37 15.22 15.26 15.25 15.26 15.22 15.25 15.25 15.22 15.26 15.31 15.32 15.35 15.35 15.36 15.41 15.41 15.5 15.53 15.52 15.47 15.5 15.56 15.44 15.26 15.17 15.11 15.1 15.13 15.14 15.03 15.01 14.87 14.74 14.85 14.9 14.96 14.97 14.99 15.07 15.09 14.97 14.88 14.91 14.75 14.71 14.51 14.51 14.36 14.45 14.45 14.5 14.5 14.51 14.37 14.42 14.51 14.52 14.51 14.55 14.52 14.43 14.42 14.45 14.35 14.2 14.32 14.22 14.21 14.23 14.24 14.2 14.23 14.25 14.23 14.28 14.35 14.37 14.24 14.29 14.34 14.2 14.25 14.27 14.22 14.2 14.22 13.94 14.02 13.96 13.95 13.94 14.03 14.08 14.06 14.03 14.14 14.31 14.42 14.44 14.44 14.72 14.84 14.89 15 14.96 14.8 14.83 14.94 14.91 14.92 15.03 15.06 15.14 15.14 15.23 15.21 15.1 15.12 15.12 15.24 15.24 15.2 15.15 15.12 15.02 15.2 15.19 15.16 15.1 15.12 15.13 15.1 15.14 15.16 15.15 15.15 15.23 15.31 15.29 15.36 15.2 15.21 15.14 14.95 15.02 15.06 14.95 14.95 14.91 14.8 14.85 14.85 14.85 14.79 14.81 14.85 14.95 14.98 14.9 14.98 14.95 15.02 15.11 15.03 14.97 14.91 14.73 14.7 14.6 14.55 14.44 14.35 14.38 14.39 14.37 14.43 14.51 14.46 14.47 14.54 14.57 4/30/06 14.57 FUND SNAPSHOT ------------------------------------ Common Share Price $14.57 ------------------------------------ Common Share Net Asset Value $15.18 ------------------------------------ Premium/(Discount) to NAV -4.02% ------------------------------------ Market Yield 5.56% ------------------------------------ Taxable-Equivalent Yield1 7.72% ------------------------------------ Net Assets Applicable to Common Shares ($000) $1,231,901 ------------------------------------ Average Effective Maturity on Securities (Years) 17.62 ------------------------------------ Leverage-Adjusted Duration 8.38 ------------------------------------ AVERAGE ANNUAL TOTAL RETURN (Inception 9/19/91) ------------------------------------ ON SHARE PRICE ON NAV ------------------------------------ 6-Month (Cumulative) 4.17% 1.79% ------------------------------------ 1-Year 3.80% 1.51% ------------------------------------ 5-Year 7.28% 6.92% ------------------------------------ 10-Year 6.43% 6.49% ------------------------------------ STATES (as a % of total investments) ------------------------------------ California 19.3% ------------------------------------ Texas 10.5% ------------------------------------ Alabama 7.1% ------------------------------------ New York 6.2% ------------------------------------ Nevada 5.4% ------------------------------------ Colorado 4.6% ------------------------------------ Michigan 4.2% ------------------------------------ Florida 4.1% ------------------------------------ Illinois 3.9% ------------------------------------ Massachusetts 3.0% ------------------------------------ Wisconsin 2.7% ------------------------------------ South Carolina 2.6% ------------------------------------ Hawaii 2.1% ------------------------------------ Ohio 1.9% ------------------------------------ Indiana 1.7% ------------------------------------ New Jersey 1.5% ------------------------------------ Louisiana 1.5% ------------------------------------ Virginia 1.5% ------------------------------------ Other 16.2% ------------------------------------ INDUSTRIES (as a % of total investments) ------------------------------------ U.S. Guaranteed 23.1% ------------------------------------ Tax Obligation/Limited 16.9% ------------------------------------ Transportation 16.8% ------------------------------------ Tax Obligation/General 13.0% ------------------------------------ Health Care 7.7% ------------------------------------ Utilities 7.4% ------------------------------------ Water and Sewer 6.7% ------------------------------------ Other 8.4% ------------------------------------ 1 Taxable-Equivalent Yield represents the yield that must be earned on a fully taxable investment, in order to equal the yield of the Fund on an after-tax basis. It is based on a federal income tax rate of 28%. When comparing this Fund to investments that generate qualified dividend income, the Taxable-Equivalent Yield is lower. 2 The Fund paid shareholders capital gains and net ordinary income distributions in December 2005 of $0.1398 per share. 13 Nuveen Premier Insured Municipal Income Fund, Inc. NIF Performance OVERVIEW As of April 30, 2006 Pie Chart: CREDIT QUALITY (as a % of total investments) Insured 83% U.S. Guaranteed 17% Bar Chart: 2005-2006 MONTHLY TAX-FREE DIVIDENDS PER SHARE2 May 0.0785 Jun 0.0745 Jul 0.0745 Aug 0.0745 Sep 0.071 Oct 0.071 Nov 0.071 Dec 0.0675 Jan 0.0675 Feb 0.0675 Mar 0.0675 Apr 0.0675 Line Chart: SHARE PRICE PERFORMANCE Weekly Closing Price Past performance is not predictive of future results. 5/01/05 15.13 15.22 15.22 15.3 15.2 15.29 15.35 15.31 15.41 15.26 15.3 15.42 15.41 15.35 15.34 15.42 15.43 15.56 15.56 15.65 15.58 15.6 15.55 15.49 15.51 15.5 15.54 15.53 15.48 15.42 15.4 15.4 15.58 15.53 15.5 15.56 15.6 15.65 15.69 15.69 15.62 15.7 15.69 15.74 15.81 15.86 15.85 15.92 16 16 16.03 16 15.81 15.6 15.47 15.54 15.45 15.45 15.53 15.6 15.65 15.67 15.62 15.62 15.7 15.77 15.75 15.7 15.57 15.37 15.4 15.48 15.49 15.36 15.34 15.33 15.24 15.33 15.24 15.26 15.28 15.37 15.34 15.25 15.38 15.37 15.44 15.5 15.5 15.58 15.58 15.45 15.48 15.54 15.53 15.5 15.34 15.38 15.33 15.31 15.37 15.19 15.07 15.15 15.11 15.14 15.14 15.26 15.24 15.25 15.32 15.27 15.14 15.14 15.15 14.96 14.71 14.64 14.5 14.41 14.39 14.42 14.46 14.57 14.67 14.39 14.46 14.41 14.4 14.42 14.41 14.46 14.33 14.32 14.32 14.15 14.11 14.01 14.09 14.11 14.13 14.1 14.02 14.18 14.15 14.2 14.26 14.38 14.36 14.37 14.42 14.23 14.29 14.25 14.26 14.38 14.22 14.16 13.9 13.97 13.92 13.97 14.04 13.97 14.07 14.14 14.19 14.15 14.29 14.41 14.31 14.31 14.41 14.44 14.51 14.61 14.6 14.56 14.47 14.51 14.47 14.48 14.59 14.62 14.64 14.72 14.84 14.88 14.86 14.88 14.77 14.91 15.03 14.99 15 15 14.99 14.87 14.95 15 15 14.96 14.87 14.9 14.8 14.76 14.75 14.86 14.85 14.95 14.99 14.99 15.16 15.02 14.87 14.74 14.86 14.85 14.86 14.82 14.75 14.76 14.81 14.76 14.6 14.65 14.76 14.62 14.87 15 15 14.93 14.9 14.98 14.99 14.98 14.9 14.76 14.76 14.69 14.72 14.6 14.51 14.47 14.49 14.38 14.37 14.37 14.41 14.4 14.29 14.3 14.44 4/30/06 14.44 FUND SNAPSHOT ------------------------------------ Common Share Price $14.44 ------------------------------------ Common Share Net Asset Value $15.00 ------------------------------------ Premium/(Discount) to NAV -3.73% ------------------------------------ Market Yield 5.61% ------------------------------------ Taxable-Equivalent Yield1 7.79% ------------------------------------ Net Assets Applicable to Common Shares ($000) $291,250 ------------------------------------ Average Effective Maturity on Securities (Years) 15.99 ------------------------------------ Leverage-Adjusted Duration 8.91 ------------------------------------ AVERAGE ANNUAL TOTAL RETURN (Inception 12/19/91) ------------------------------------ ON SHARE PRICE ON NAV ------------------------------------ 6-Month (Cumulative) 3.77% 1.11% ------------------------------------ 1-Year 1.97% 1.04% ------------------------------------ 5-Year 6.47% 6.67% ------------------------------------ 10-Year 6.43% 6.19% ------------------------------------ STATES (as a % of total investments) ------------------------------------ California 19.9% ------------------------------------ Washington 12.1% ------------------------------------ Illinois 10.3% ------------------------------------ Texas 6.9% ------------------------------------ New York 6.0% ------------------------------------ Nevada 5.7% ------------------------------------ Colorado 4.7% ------------------------------------ Florida 3.7% ------------------------------------ Oregon 2.8% ------------------------------------ Hawaii 2.5% ------------------------------------ Michigan 2.4% ------------------------------------ Tennessee 2.4% ------------------------------------ Missouri 2.3% ------------------------------------ Other 18.3% ------------------------------------ INDUSTRIES (as a % of total investments) ------------------------------------ Tax Obligation/General 22.9% ------------------------------------ Transportation 19.6% ------------------------------------ U.S. Guaranteed 17.3% ------------------------------------ Tax Obligation/Limited 13.0% ------------------------------------ Health Care 10.1% ------------------------------------ Utilities 7.4% ------------------------------------ Other 9.7% ------------------------------------ 1 Taxable-Equivalent Yield represents the yield that must be earned on a fully taxable investment, in order to equal the yield of the Fund on an after-tax basis. It is based on a federal income tax rate of 28%. When comparing this Fund to investments that generate qualified dividend income, the Taxable-Equivalent Yield is lower. 2 The Fund paid shareholders a capital gains distribution in December 2005 of $0.0955 per share. 14 Nuveen Insured Premium Income Municipal Fund 2 NPX Performance OVERVIEW As of April 30, 2006 Pie Chart: CREDIT QUALITY (as a % of total investments) Insured 88% U.S. Guaranteed 12% Bar Chart: 2005-2006 MONTHLY TAX-FREE DIVIDENDS PER SHARE May 0.07 Jun 0.0665 Jul 0.0665 Aug 0.0665 Sep 0.0635 Oct 0.0635 Nov 0.0635 Dec 0.06 Jan 0.06 Feb 0.06 Mar 0.057 Apr 0.057 Line Chart: SHARE PRICE PERFORMANCE Weekly Closing Price Past performance is not predictive of future results. 5/01/05 13.38 13.35 13.41 13.43 13.35 13.34 13.5 13.43 13.46 13.48 13.56 13.64 13.54 13.51 13.47 13.5 13.54 13.49 13.48 13.46 13.58 13.61 13.65 13.61 13.66 13.68 13.73 13.72 13.74 13.59 13.65 13.56 13.56 13.55 13.47 13.52 13.5 13.55 13.56 13.67 13.68 13.7 13.64 13.6 13.63 13.71 13.75 13.75 13.78 13.81 13.69 13.69 13.66 13.59 13.63 13.7 13.57 13.58 13.67 13.67 13.69 13.69 13.68 13.68 13.68 13.71 13.9 13.84 13.76 13.7 13.56 13.63 13.59 13.6 13.57 13.62 13.59 13.54 13.56 13.6 13.61 13.62 13.61 13.62 13.63 13.67 13.69 13.78 13.82 13.8 13.81 13.89 13.87 13.86 13.79 13.65 13.51 13.47 13.43 13.32 13.29 13.24 13.17 13.05 12.94 13.07 13.1 13.15 13.14 13.1 13.2 13.21 13.13 13.13 13.17 12.9 12.74 12.74 12.75 12.68 12.74 12.75 12.86 12.89 12.87 12.7 12.75 12.75 12.83 12.88 12.83 12.75 12.81 12.8 12.86 12.75 12.61 12.65 12.58 12.5 12.53 12.54 12.47 12.44 12.48 12.51 12.53 12.61 12.6 12.65 12.63 12.65 12.57 12.54 12.51 12.56 12.55 12.51 12.42 12.44 12.47 12.47 12.44 12.46 12.43 12.43 12.52 12.54 12.58 12.61 12.65 12.65 12.67 12.79 13.03 13.08 13.18 13 12.85 12.89 12.95 12.96 12.99 13 13.06 13.07 13.14 13.11 13.05 13.1 13.08 13.09 13.13 13.08 13.05 12.96 13.04 13.04 13.15 13.2 13.14 13.14 13.14 13.13 13.14 13.11 13.16 13.09 13.15 13.15 13.22 13.19 13.14 13.06 13 12.86 12.82 12.85 12.87 12.91 12.9 12.92 12.96 12.95 12.92 12.95 12.93 12.95 12.91 12.93 12.92 12.94 12.91 12.99 13.08 13.08 12.94 12.93 12.9 12.82 12.72 12.74 12.69 12.64 12.62 12.62 12.53 12.55 12.54 12.52 12.58 12.6 12.66 4/30/06 12.66 FUND SNAPSHOT ------------------------------------ Common Share Price $12.66 ------------------------------------ Common Share Net Asset Value $13.79 ------------------------------------ Premium/(Discount) to NAV -8.19% ------------------------------------ Market Yield 5.40% ------------------------------------ Taxable-Equivalent Yield1 7.50% ------------------------------------ Net Assets Applicable to Common Shares ($000) $515,211 ------------------------------------ Average Effective Maturity on Securities (Years) 17.18 ------------------------------------ Leverage-Adjusted Duration 8.25 ------------------------------------ AVERAGE ANNUAL TOTAL RETURN (Inception 7/22/93) ------------------------------------ ON SHARE PRICE ON NAV ------------------------------------ 6-Month (Cumulative) 1.45% 1.55% ------------------------------------ 1-Year 0.24% 1.42% ------------------------------------ 5-Year 5.90% 6.71% ------------------------------------ 10-Year 7.40% 6.68% ------------------------------------ STATES (as a % of total investments) ------------------------------------ California 14.5% ------------------------------------ Texas 10.0% ------------------------------------ Pennsylvania 8.7% ------------------------------------ New York 8.6% ------------------------------------ Colorado 6.2% ------------------------------------ Hawaii 5.3% ------------------------------------ Washington 4.6% ------------------------------------ Wisconsin 4.3% ------------------------------------ Massachusetts 3.8% ------------------------------------ North Dakota 2.5% ------------------------------------ Georgia 2.5% ------------------------------------ Oregon 2.4% ------------------------------------ Utah 2.2% ------------------------------------ Nevada 2.1% ------------------------------------ Illinois 2.1% ------------------------------------ New Jersey 2.1% ------------------------------------ Other 18.1% ------------------------------------ INDUSTRIES (as a % of total investments) ------------------------------------ Utilities 17.0% ------------------------------------ Tax Obligation/Limited 13.2% ------------------------------------ Tax Obligation/General 12.5% ------------------------------------ U.S. Guaranteed 12.1% ------------------------------------ Water and Sewer 11.6% ------------------------------------ Transportation 11.0% ------------------------------------ Health Care 10.6% ------------------------------------ Education and Civic Organizations 7.4% ------------------------------------ Other 4.6% ------------------------------------ 1 Taxable-Equivalent Yield represents the yield that must be earned on a fully taxable investment, in order to equal the yield of the Fund on an after-tax basis. It is based on a federal income tax rate of 28%. When comparing this Fund to investments that generate qualified dividend income, the Taxable-Equivalent Yield is lower. 15 Nuveen Insured Dividend Advantage Municipal Fund NVG Performance OVERVIEW As of April 30, 2006 Pie Chart: CREDIT QUALITY (as a % of total investments) Insured 93% AAA (Uninsured) 2% AA (Uninsured) 5% Bar Chart: 2005-2006 MONTHLY TAX-FREE DIVIDENDS PER SHARE May 0.0745 Jun 0.0705 Jul 0.0705 Aug 0.0705 Sep 0.0705 Oct 0.0705 Nov 0.0705 Dec 0.0705 Jan 0.0705 Feb 0.0705 Mar 0.0705 Apr 0.0705 Line Chart: SHARE PRICE PERFORMANCE Weekly Closing Price Past performance is not predictive of future results. 5/01/05 14.36 14.37 14.38 14.38 14.31 14.34 14.35 14.26 14.32 14.38 14.38 14.43 14.45 14.47 14.39 14.45 14.5 14.5 14.44 14.53 14.66 14.82 14.84 14.9 14.91 14.9 14.85 14.75 14.63 14.45 14.45 14.47 14.62 14.72 14.69 14.73 14.78 14.72 14.7 14.73 14.72 14.79 14.75 14.77 14.79 14.85 14.84 14.9 14.9 14.94 14.83 14.84 14.85 14.76 14.82 14.82 14.74 14.71 14.7 14.79 14.87 14.94 14.91 14.91 14.88 14.79 14.83 14.88 14.82 14.82 14.86 14.8 14.78 14.74 14.7 14.74 14.73 14.69 14.68 14.64 14.67 14.66 14.7 14.68 14.7 14.73 14.72 14.73 14.86 14.81 14.85 14.88 14.92 14.95 14.89 14.87 14.68 14.55 14.58 14.46 14.55 14.46 14.47 14.49 14.43 14.55 14.45 14.46 14.52 14.5 14.5 14.43 14.5 14.5 14.54 14.37 14.18 14.14 14.1 14.07 13.96 14.11 14.24 14.29 14.24 14.18 14.19 14.12 14.17 14.2 14.08 14.12 14.06 14.12 14.18 14.13 14.06 14.16 14.07 14.05 14.13 14.06 13.95 14.03 14 13.93 14.07 14.14 14.15 14.03 14.03 14.14 14.04 14 14.05 14.1 14.1 14.11 13.97 13.93 13.9 13.97 14.03 14 13.99 14.06 14 14.05 14.08 14.17 14.12 14.12 14.23 14.34 14.36 14.58 14.65 14.6 14.5 14.55 14.7 14.72 14.96 14.9 14.86 14.9 14.98 14.95 15 14.94 14.92 15.03 15.03 14.92 14.87 14.91 15.01 14.93 14.98 14.85 14.74 14.87 14.94 14.94 15.01 14.89 15.02 15 15 15.01 15.04 14.98 15.04 15.05 15 14.94 15.04 15.07 15.05 14.92 14.91 14.91 14.92 15.01 15.08 15 14.94 14.9 14.8 14.82 14.81 14.85 14.87 14.88 14.93 14.98 14.99 15.07 14.97 14.98 14.88 14.88 14.89 14.61 14.72 14.88 14.9 15 14.98 14.98 15 14.99 15.1 4/30/06 15.1 FUND SNAPSHOT ------------------------------------ Common Share Price $15.10 ------------------------------------ Common Share Net Asset Value $15.14 ------------------------------------ Premium/(Discount) to NAV -0.26% ------------------------------------ Market Yield 5.60% ------------------------------------ Taxable-Equivalent Yield1 7.78% ------------------------------------ Net Assets Applicable to Common Shares ($000) $451,207 ------------------------------------ Average Effective Maturity on Securities (Years) 16.17 ------------------------------------ Leverage-Adjusted Duration 7.95 ------------------------------------ AVERAGE ANNUAL TOTAL RETURN (Inception 3/25/02) ------------------------------------ ON SHARE PRICE ON NAV ------------------------------------ 6-Month (Cumulative) 9.66% 2.19% ------------------------------------ 1-Year 11.87% 2.33% ------------------------------------ Since Inception 6.87% 7.80% ------------------------------------ STATES (as a % of total investments) ------------------------------------ Texas 18.3% ------------------------------------ Indiana 11.5% ------------------------------------ Illinois 10.0% ------------------------------------ Washington 9.1% ------------------------------------ Florida 8.7% ------------------------------------ California 7.8% ------------------------------------ Tennessee 6.2% ------------------------------------ Pennsylvania 3.6% ------------------------------------ Colorado 3.0% ------------------------------------ Nevada 2.9% ------------------------------------ Other 18.9% ------------------------------------ INDUSTRIES (as a % of total investments) ------------------------------------ U.S. Guaranteed 19.3% ------------------------------------ Tax Obligation/General 18.1% ------------------------------------ Tax Obligation/Limited 15.7% ------------------------------------ Transportation 13.4% ------------------------------------ Water and Sewer 9.2% ------------------------------------ Education and Civic Organizations 7.4% ------------------------------------ Utilities 7.3% ------------------------------------ Health Care 7.0% ------------------------------------ Other 2.6% ------------------------------------ 1 Taxable-Equivalent Yield represents the yield that must be earned on a fully taxable investment, in order to equal the yield of the Fund on an after-tax basis. It is based on a federal income tax rate of 28%. When comparing this Fund to investments that generate qualified dividend income, the Taxable-Equivalent Yield is lower. 16 Nuveen Insured Tax-Free Advantage Municipal Fund NEA Performance OVERVIEW As of April 30, 2006 Pie Chart: CREDIT QUALITY (as a % of total investments) Insured 89% AAA (Uninsured) 4% AA (Uninsured) 2% A (Uninsured) 3% BBB (Uninsured) 2% Bar Chart: 2005-2006 MONTHLY TAX-FREE DIVIDENDS PER SHARE May 0.0685 Jun 0.065 Jul 0.065 Aug 0.065 Sep 0.062 Oct 0.062 Nov 0.062 Dec 0.062 Jan 0.062 Feb 0.062 Mar 0.062 Apr 0.062 Line Chart: SHARE PRICE PERFORMANCE Weekly Closing Price Past performance is not predictive of future results. 5/01/05 14.07 14.08 14.1 13.9 13.82 13.87 14.09 14.04 14.1 14.25 14.27 14.24 14.25 14.26 14.26 14.5 14.44 14.33 14.3 14.11 14.25 14.4 14.49 14.38 14.47 14.47 14.47 14.44 14.33 14.26 14.22 14.17 14.33 14.51 14.35 14.5 14.49 14.49 14.46 14.49 14.51 14.62 14.5 14.57 14.47 14.5 14.47 14.48 14.5 14.5 14.5 14.5 14.43 14.44 14.45 14.41 14.34 14.53 14.46 14.61 14.66 14.83 14.73 14.73 14.75 14.7 14.67 14.51 14.55 14.65 14.55 14.59 14.4 14.42 14.35 14.34 14.34 14.4 14.4 14.36 14.44 14.46 14.39 14.43 14.47 14.47 14.58 14.64 14.57 14.6 14.55 14.43 14.4 14.52 14.52 14.38 14.27 14.31 14.21 14.11 14.04 13.79 13.87 13.9 13.68 13.7 13.78 13.88 13.93 13.92 13.88 13.91 13.91 13.87 14.04 14.12 13.79 13.92 13.78 13.47 13.51 13.5 13.59 13.52 13.5 13.23 13.34 13.41 13.41 13.47 13.44 13.37 13.18 13.31 13.33 13.27 13.2 13.16 13.06 13.02 13.15 13.08 13.15 13.17 13.09 13.09 13.07 13.17 13.05 12.98 13.12 13.09 13.08 13.1 13.01 13.13 13.09 13.16 13.09 13.11 13.1 13.09 13.04 13.01 13.01 13.04 13.12 13.11 13.23 13.35 13.34 13.34 13.56 13.63 13.68 13.7 13.71 13.68 13.68 13.94 13.65 13.6 13.7 13.74 13.72 13.81 14.01 13.93 13.83 13.95 13.83 13.88 13.84 13.7 13.62 13.6 13.6 13.67 13.73 13.75 13.95 13.84 13.92 13.9 14 14.05 14.07 14.02 14.04 14.1 14.1 14.07 14.02 13.85 13.85 13.8 13.8 13.95 13.87 13.71 13.65 13.8 13.75 13.82 13.73 13.57 13.67 13.63 13.75 13.71 13.73 13.75 13.69 13.78 13.8 13.79 13.84 13.75 13.72 13.65 13.56 13.48 13.5 13.56 13.73 13.6 13.59 13.65 13.66 13.7 13.7 13.75 13.71 4/30/06 13.71 FUND SNAPSHOT ------------------------------------ Common Share Price $13.71 ------------------------------------ Common Share Net Asset Value $14.55 ------------------------------------ Premium/(Discount) to NAV -5.77% ------------------------------------ Market Yield 5.43% ------------------------------------ Taxable-Equivalent Yield1 7.54% ------------------------------------ Net Assets Applicable to Common Shares ($000) $269,324 ------------------------------------ Average Effective Maturity on Securities (Years) 20.53 ------------------------------------ Leverage-Adjusted Duration 7.26 ------------------------------------ AVERAGE ANNUAL TOTAL RETURN (Inception 11/21/02) ------------------------------------ ON SHARE PRICE ON NAV ------------------------------------ 6-Month (Cumulative) 5.05% 2.49% ------------------------------------ 1-Year 2.50% 2.51% ------------------------------------ Since Inception 3.27% 6.36% ------------------------------------ STATES (as a % of total investments) ------------------------------------ California 19.3% ------------------------------------ Texas 8.6% ------------------------------------ Michigan 7.7% ------------------------------------ New York 6.8% ------------------------------------ Washington 6.1% ------------------------------------ Indiana 5.8% ------------------------------------ Pennsylvania 5.8% ------------------------------------ Alabama 5.5% ------------------------------------ South Carolina 4.9% ------------------------------------ Wisconsin 4.4% ------------------------------------ Massachusetts 3.4% ------------------------------------ Colorado 2.5% ------------------------------------ Illinois 2.5% ------------------------------------ Arizona 2.5% ------------------------------------ Other 14.2% ------------------------------------ INDUSTRIES (as a % of total investments) ------------------------------------ Tax Obligation/General 27.9% ------------------------------------ Tax Obligation/Limited 26.2% ------------------------------------ Health Care 13.6% ------------------------------------ Utilities 9.5% ------------------------------------ Transportation 7.1% ------------------------------------ Water and Sewer 6.5% ------------------------------------ U.S. Guaranteed 6.1% ------------------------------------ Other 3.1% ------------------------------------ 1 Taxable-Equivalent Yield represents the yield that must be earned on a fully taxable investment, in order to equal the yield of the Fund on an after-tax basis. It is based on a federal income tax rate of 28%. When comparing this Fund to investments that generate qualified dividend income, the Taxable-Equivalent Yield is lower. 17 Nuveen Insured Quality Municipal Fund, Inc. (NQI) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ALABAMA - 1.5% (1.0% OF TOTAL INVESTMENTS) $ 1,135 Birmingham Waterworks and Sewerage Board, Alabama, Water 1/13 at 100.00 AAA $ 1,202,589 and Sewerage Revenue Bonds, Series 2002B, 5.250%, 1/01/20 - MBIA Insured 7,500 Huntsville Healthcare Authority, Alabama, Revenue Bonds, 6/15 at 100.00 AAA 7,709,325 Series 2005A, 5.000%, 6/01/24 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 8,635 Total Alabama 8,911,914 ------------------------------------------------------------------------------------------------------------------------------------ ARIZONA - 1.6% (1.1% OF TOTAL INVESTMENTS) 9,200 Phoenix, Arizona, Civic Improvement Corporation, Senior Lien 7/12 at 100.00 AAA 9,465,328 Airport Revenue Bonds, Series 2002B, 5.250%, 7/01/32 - FGIC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ ARKANSAS - 0.8% (0.5% OF TOTAL INVESTMENTS) 4,250 University of Arkansas, Fayetteville, Revenue Bonds, Medical 11/14 at 100.00 Aaa 4,406,443 Sciences Campus, Series 2004B, 5.000%, 11/01/24 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA - 29.0% (18.9% OF TOTAL INVESTMENTS) 1,500 Acalanes Union High School District, Contra Costa County, 8/15 at 100.00 AAA 1,564,830 California, General Obligation Bonds, Series 2005, 5.000%, 8/01/24 - FGIC Insured 6,620 Alameda County, California, Certificates of Participation, 9/06 at 102.00 AAA 6,801,256 Alameda County Public Facilities Corporation, Series 1991, 6.000%, 9/01/21 (Pre-refunded 9/01/06) - MBIA Insured California Department of Water Resources, Water System Revenue Bonds, Central Valley Project, Series 2005AC: 4,045 5.000%, 12/01/24 - MBIA Insured 12/14 at 100.00 AAA 4,206,638 4,000 5.000%, 12/01/26 - MBIA Insured 12/14 at 100.00 AAA 4,151,160 1,275 California Educational Facilities Authority, Revenue Bonds, 10/15 at 100.00 Aaa 1,369,541 Occidental College, Series 2005A, 5.250%, 10/01/23 - MBIA Insured 13,175 California Pollution Control Financing Authority, Revenue 9/09 at 101.00 AAA 13,853,776 Refunding Bonds, Southern California Edison Company, Series 1999A, 5.450%, 9/01/29 - MBIA Insured 8,000 California, General Obligation Bonds, Series 2002, 10/12 at 100.00 AAA 8,188,080 5.000%, 10/01/32 - MBIA Insured 3,750 California, General Obligation Bonds, Series 2004, 4/14 at 100.00 AAA 3,857,325 5.000%, 4/01/31 - AMBAC Insured 20,500 California, General Obligation Refunding Bonds, Series 2002, 4/12 at 100.00 AAA 21,003,685 5.000%, 4/01/27 - AMBAC Insured 2,340 Cerritos Public Financing Authority, California, Tax Allocation 11/17 at 102.00 AAA 2,463,529 Revenue Bonds, Los Cerritos Redevelopment Projects, Series 2002A, 5.000%, 11/01/24 - AMBAC Insured Foothill/Eastern Transportation Corridor Agency, California, Toll Road Revenue Refunding Bonds, Series 1999: 22,985 0.000%, 1/15/24 - MBIA Insured 1/10 at 44.52 AAA 8,642,590 22,000 0.000%, 1/15/31 - MBIA Insured 1/10 at 29.11 AAA 5,417,720 50,000 0.000%, 1/15/37 - MBIA Insured 1/10 at 20.19 AAA 8,538,500 5,000 Garden Grove, California, Certificates of Participation, Financing 3/12 at 101.00 AAA 5,174,300 Project, Series 2002A, 5.125%, 3/01/32 - AMBAC Insured 5,500 Golden State Tobacco Securitization Corporation, California, 6/15 at 100.00 AAA 5,626,830 Tobacco Settlement Asset-Backed Revenue Bonds, Series 2005A, 5.000%, 6/01/35 - FGIC Insured 5,000 Inland Empire Solid Waste Financing Authority, California, 8/06 at 102.00 AAA 5,126,950 Revenue Bonds, Landfill Improvement Financing Project, Series 1996B, 6.000%, 8/01/16 (Pre-refunded 8/01/06) - FSA Insured (Alternative Minimum Tax) 3,795 Kern Community College District, California, General Obligation 11/15 at 100.00 AAA 3,986,913 Bonds, Series 2005, 5.000%, 11/01/20 - FSA Insured 3,600 Los Angeles Unified School District, California, General 7/16 at 100.00 AAA 3,761,892 Obligation Bonds, Series 2006F, 5.000%, 7/01/25 - FGIC Insured 18 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA (continued) $ 5,438 Moreno Valley Public Finance Authority, California, GNMA 1/12 at 105.00 Aaa $ 5,796,745 Collateralized Assisted Living Housing Revenue Bonds, CDC Assisted Living Project, Series 2000A, 7.500%, 1/20/42 5,860 Ontario Redevelopment Financing Authority, San Bernardino 8/06 at 100.00 AAA 5,997,124 County, California, Revenue Bonds, Redevelopment Project 1, Series 1993, 5.850%, 8/01/22 - MBIA Insured (ETM) 3,615 Pasadena Unified School District, Los Angeles County, California, 5/13 at 100.00 AAA 3,862,519 General Obligation Bonds, Series 2003D, 5.000%, 5/01/24 (Pre-refunded 5/01/13) - MBIA Insured 2,590 Riverside County Public Financing Authority, California, 10/14 at 100.00 AAA 2,669,798 Tax Allocation Bonds, Multiple Projects, Series 2004, 5.000%, 10/01/25 - XLCA Insured 2,000 San Diego Redevelopment Agency, California, Subordinate 9/14 at 100.00 AAA 2,070,900 Lien Tax Allocation Bonds, Centre City Project, Series 2004A, 5.000%, 9/01/21 - XLCA Insured San Francisco Airports Commission, California, Revenue Refunding Bonds, San Francisco International Airport, Second Series 2001, Issue 27A: 7,200 5.125%, 5/01/21 - MBIA Insured (Alternative Minimum Tax) 5/11 at 100.00 AAA 7,402,032 12,690 5.250%, 5/01/31 - MBIA Insured (Alternative Minimum Tax) 5/11 at 100.00 AAA 12,978,317 San Francisco Bay Area Rapid Transit District, California, Sales Tax Revenue Bonds, Series 2005A: 2,000 5.000%, 7/01/21 - MBIA Insured 7/15 at 100.00 AAA 2,093,520 3,655 5.000%, 7/01/22 - MBIA Insured 7/15 at 100.00 AAA 3,823,093 3,840 5.000%, 7/01/23 - MBIA Insured 7/15 at 100.00 AAA 4,010,688 1,000 Sierra Joint Community College District, Tahoe Truckee, 8/14 at 100.00 AAA 1,034,450 California, General Obligation Bonds, School Facilities Improvement District 1, Series 2005A, 5.000%, 8/01/27 - FGIC Insured 1,575 Sierra Joint Community College District, Western Nevada, 8/14 at 100.00 AAA 1,627,070 California, General Obligation Bonds, School Facilities Improvement District 2, Series 2005A, 5.000%, 8/01/27 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 234,548 Total California 167,101,771 ------------------------------------------------------------------------------------------------------------------------------------ COLORADO - 1.4% (0.9% OF TOTAL INVESTMENTS) 2,015 Board of Trustees of the University of Northern Colorado, 6/15 at 100.00 AAA 2,107,025 Revenue Bonds, Series 2005, 5.000%, 6/01/22 - FSA Insured 3,750 Denver City and County, Colorado, Airport System Revenue 11/06 at 101.00 AAA 3,819,413 Bonds, Series 1996D, 5.500%, 11/15/25 - MBIA Insured 1,250 Jefferson County School District R1, Colorado, General 12/14 at 100.00 AAA 1,301,038 Obligation Bonds, Series 2004, 5.000%, 12/15/24 - FSA Insured 1,000 University of Colorado, Enterprise System Revenue Bonds, 6/15 at 100.00 AAA 1,035,800 Series 2005, 5.000%, 6/01/30 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 8,015 Total Colorado 8,263,276 ------------------------------------------------------------------------------------------------------------------------------------ CONNECTICUT - 0.4% (0.2% OF TOTAL INVESTMENTS) 2,000 Connecticut, General Obligation Bonds, Series 2004D, 12/14 at 100.00 AAA 2,095,940 5.000%, 12/01/22 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ DELAWARE - 0.5% (0.4% OF TOTAL INVESTMENTS) 3,000 Delaware River and Bay Authority, Delaware and 1/15 at 100.00 AAA 3,122,970 New Jersey, Revenue Bonds, Series 2005, 5.000%, 1/01/25 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ DISTRICT OF COLUMBIA - 1.4% (0.9% OF TOTAL INVESTMENTS) 8,000 Washington Convention Center Authority, District of Columbia, 10/08 at 101.00 AAA 8,255,760 Senior Lien Dedicated Tax Revenue Bonds, Series 1998, 5.000%, 10/01/21 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA - 8.5% (5.6% OF TOTAL INVESTMENTS) 3,450 Collier County, Florida, Capital Improvement Revenue Bonds, 10/14 at 100.00 AAA 3,590,588 Series 2005, 5.000%, 10/01/24 - MBIA Insured 4,000 Florida Board of Education, Lottery Revenue Bonds, 7/15 at 101.00 AAA 4,206,640 Series 2005A, 5.000%, 7/01/22 - AMBAC Insured 3,250 Florida State Board of Education, Full Faith and Credit Public 6/13 at 101.00 AAA 3,381,430 Education Capital Outlay Bonds, Series 2003J, 5.000%, 6/01/22 - AMBAC Insured 19 Nuveen Insured Quality Municipal Fund, Inc. (NQI) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA (continued) $ 20,000 Lee County, Florida, Airport Revenue Bonds, Series 2000A, 10/10 at 101.00 AAA $ 21,294,800 5.750%, 10/01/25 - FSA Insured (Alternative Minimum Tax) 4,115 Miami-Dade County Housing Finance Authority, Florida, 7/11 at 100.00 AAA 4,251,042 Multifamily Housing Revenue Bonds, Monterey Pointe Apartments, Series 2001-2A, 5.850%, 7/01/37 - FSA Insured (Alternative Minimum Tax) 7,000 Miami-Dade County, Florida, Aviation Revenue Bonds, Miami 10/12 at 100.00 AAA 7,288,260 International Airport, Series 2002, 5.375%, 10/01/32 - FGIC Insured (Alternative Minimum Tax) 1,000 Ocala, Florida, Utility System Revenue Bonds, Series 2005B, 10/15 at 100.00 Aaa 1,070,940 5.250%, 10/01/25 - FGIC Insured 3,780 Palm Beach County School Board, Florida, Certificates of 8/13 at 100.00 AAA 3,967,979 Participation, Series 2003A, 5.000%, 8/01/16 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 46,595 Total Florida 49,051,679 ------------------------------------------------------------------------------------------------------------------------------------ GEORGIA - 0.3% (0.1% OF TOTAL INVESTMENTS) 1,000 Atlanta, Georgia, Water and Wastewater Revenue Bonds, 11/14 at 100.00 AAA 1,040,400 Series 2004, 5.000%, 11/01/22 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ HAWAII - 6.1% (4.0% OF TOTAL INVESTMENTS) 1,620 Hawaii County, Hawaii, General Obligation Bonds, Series 2003A, 7/13 at 100.00 AAA 1,683,472 5.000%, 7/15/21 - FSA Insured 16,180 Hawaii Department of Budget and Finance, Special Purpose 5/06 at 101.00 AAA 16,371,895 Revenue Bonds, Hawaiian Electric Company Inc., Series 1996A, 6.200%, 5/01/26 - MBIA Insured (Alternative Minimum Tax) Hawaii Department of Transportation, Airport System Revenue Refunding Bonds, Series 2000B: 8,785 6.625%, 7/01/18 - FGIC Insured (Alternative Minimum Tax) 7/10 at 101.00 AAA 9,676,853 7,000 6.000%, 7/01/19 - FGIC Insured (Alternative Minimum Tax) 7/10 at 101.00 AAA 7,543,270 ------------------------------------------------------------------------------------------------------------------------------------ 33,585 Total Hawaii 35,275,490 ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS - 15.4% (10.0% OF TOTAL INVESTMENTS) 9,500 Chicago, Illinois, Second Lien General Airport Revenue Refunding 1/10 at 101.00 AAA 9,997,420 Bonds, O'Hare International Airport, Series 1999, 5.500%, 1/01/15 - AMBAC Insured (Alternative Minimum Tax) 2,875 Chicago, Illinois, Third Lien General Airport Revenue Bonds, 1/16 at 100.00 AAA 3,057,534 O'Hare International Airport, Series 2005A, 5.250%, 1/01/24 - MBIA Insured 25,000 Illinois Health Facilities Authority, Revenue Bonds, Iowa Health 2/10 at 101.00 AAA 26,987,250 System, Series 2000, 5.875%, 2/15/30 - AMBAC Insured (ETM) 13,275 Illinois, General Obligation Bonds, Illinois FIRST Program, 5/11 at 100.00 AAA 13,900,518 Series 2001, 5.250%, 5/01/26 - FSA Insured 15,785 Illinois, General Obligation Bonds, Illinois FIRST Program, 4/12 at 100.00 AAA 16,606,136 Series 2002, 5.250%, 4/01/27 - FSA Insured 18,000 Metropolitan Pier and Exposition Authority, Illinois, Revenue No Opt. Call AAA 7,331,040 Bonds, McCormick Place Expansion Project, Series 2002A, 0.000%, 12/15/24 - MBIA Insured 10,000 University of Illinois, Certificates of Participation, Utility 8/11 at 100.00 AAA 10,701,600 Infrastructure Projects, Series 2001B, 5.250%, 8/15/21 (Pre-refunded 8/15/11) - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 94,435 Total Illinois 88,581,498 ------------------------------------------------------------------------------------------------------------------------------------ INDIANA - 1.6% (1.1% OF TOTAL INVESTMENTS) 7,790 Indiana Transportation Finance Authority, Highway Revenue No Opt. Call AAA 9,286,926 Bonds, Series 1990A, 7.250%, 6/01/15 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ KANSAS - 0.5% (0.4% OF TOTAL INVESTMENTS) 3,000 Wichita, Kansas, Water and Sewerage Utility Revenue Bonds, 10/13 at 100.00 AAA 3,120,570 Series 2003, 5.000%, 10/01/21 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ KENTUCKY - 5.8% (3.8% OF TOTAL INVESTMENTS) 3,015 Kentucky Asset/Liability Commission, General Fund Revenue 5/15 at 100.00 AAA 3,131,289 Project Notes, First Series 2005, 5.000%, 5/01/25 - MBIA Insured 20 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ KENTUCKY (continued) Kentucky Economic Development Finance Authority, Health System Revenue Bonds, Norton Healthcare Inc., Series 2000C: $ 6,345 6.150%, 10/01/27 - MBIA Insured 10/13 at 101.00 AAA $ 7,230,191 18,185 6.150%, 10/01/28 - MBIA Insured 10/13 at 101.00 AAA 20,661,979 2,230 Kentucky State Property and Buildings Commission, Revenue 8/15 at 100.00 AAA 2,331,554 Bonds, Project 85, Series 2005, 5.000%, 8/01/23 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 29,775 Total Kentucky 33,355,013 ------------------------------------------------------------------------------------------------------------------------------------ LOUISIANA - 0.7% (0.4% OF TOTAL INVESTMENTS) 3,790 Orleans Levee District, Louisiana, Levee District General 6/06 at 103.00 AAA 3,907,983 Obligation Bonds, Series 1986, 5.950%, 11/01/15 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ MAINE - 1.5% (1.0% OF TOTAL INVESTMENTS) 8,000 Maine Health and Higher Educational Facilities Authority, 7/09 at 101.00 AAA 8,574,800 Revenue Bonds, Series 1999B, 6.000%, 7/01/29 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ MARYLAND - 1.4% (0.9% OF TOTAL INVESTMENTS) 7,535 Maryland Transportation Authority, Airport Parking Revenue 3/12 at 101.00 AAA 8,029,899 Bonds, Baltimore-Washington International Airport Passenger Facility, Series 2002B, 5.500%, 3/01/18 - AMBAC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ MASSACHUSETTS - 2.2% (1.5% OF TOTAL INVESTMENTS) 5,000 Massachusetts Bay Transportation Authority, Senior Sales Tax 7/12 at 100.00 AAA 5,308,850 Revenue Refunding Bonds, Series 2002A, 5.000%, 7/01/27 (Pre-refunded 7/01/12) - FGIC Insured 1,680 Massachusetts College Building Authority, Project Revenue 5/16 at 100.00 AAA 1,734,096 Bonds, Series 2006A, 5.000%, 5/01/36 - AMBAC Insured Massachusetts, Special Obligation Dedicated Tax Revenue Bonds, Series 2004: 1,250 5.250%, 1/01/21 (Pre-refunded 1/01/14) - FGIC Insured 1/14 at 100.00 AAA 1,341,638 1,000 5.250%, 1/01/22 (Pre-refunded 1/01/14) - FGIC Insured 1/14 at 100.00 AAA 1,073,310 1,195 5.250%, 1/01/23 (Pre-refunded 1/01/14) - FGIC Insured 1/14 at 100.00 AAA 1,282,605 2,000 5.250%, 1/01/24 (Pre-refunded 1/01/14) - FGIC Insured 1/14 at 100.00 AAA 2,146,620 ------------------------------------------------------------------------------------------------------------------------------------ 12,125 Total Massachusetts 12,887,119 ------------------------------------------------------------------------------------------------------------------------------------ MICHIGAN - 0.9% (0.6% OF TOTAL INVESTMENTS) 4,750 Michigan Strategic Fund, Collateralized Limited Obligation 9/09 at 102.00 AAA 4,978,190 Pollution Control Revenue Refunding Bonds, Detroit Edison Company, Series 1999A, 5.550%, 9/01/29 - MBIA Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ MINNESOTA - 0.0% (0.0% OF TOTAL INVESTMENTS) 127 St. Louis Park, Minnesota, GNMA Mortgage-Backed Securities 10/06 at 100.00 Aaa 127,086 Program Single Family Residential Mortgage Revenue Bonds, Series 1991A, 7.250%, 4/20/23 ------------------------------------------------------------------------------------------------------------------------------------ MISSISSIPPI - 1.4% (0.9% OF TOTAL INVESTMENTS) 2,715 Harrison County Wastewater Management District, Mississippi, No Opt. Call AAA 3,321,477 Revenue Refunding Bonds, Wastewater Treatment Facilities, Series 1991B, 7.750%, 2/01/14 - FGIC Insured 2,545 Harrison County Wastewater Management District, Mississippi, No Opt. Call AAA 3,171,299 Wastewater Treatment Facilities Revenue Refunding Bonds, Series 1991A, 8.500%, 2/01/13 - FGIC Insured 1,640 Mississippi Home Corporation, GNMA Collateralized Single 6/06 at 105.00 Aaa 1,682,361 Family Mortgage Revenue Bonds, Series 1996C, 7.600%, 6/01/29 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 6,900 Total Mississippi 8,175,137 ------------------------------------------------------------------------------------------------------------------------------------ MISSOURI - 0.3% (0.2% OF TOTAL INVESTMENTS) 1,500 Camdenton Reorganized School District R3, Camden County, No Opt. Call AAA 1,605,510 Missouri, General Obligation Bonds, Series 2005, 5.250%, 3/01/24 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 21 Nuveen Insured Quality Municipal Fund, Inc. (NQI) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ NEVADA - 7.1% (4.6% OF TOTAL INVESTMENTS) $ 33,700 Director of Nevada State Department of Business and Industry, 1/10 at 100.00 AAA $ 34,928,700 Revenue Bonds, Las Vegas Monorail Project, First Tier, Series 2000, 5.375%, 1/01/40 - AMBAC Insured 5,720 Reno, Nevada, Senior Lien Sales and Room Tax Revenue Bonds, 6/12 at 100.00 AAA 6,102,210 Reno Transportation Rail Access Corridor Project, Series 2002, 5.125%, 6/01/32 (Pre-refunded 6/01/12) - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 39,420 Total Nevada 41,030,910 ------------------------------------------------------------------------------------------------------------------------------------ NEW JERSEY - 1.1% (0.7% OF TOTAL INVESTMENTS) New Jersey Economic Development Authority, Revenue Bonds, Motor Vehicle Surcharge, Series 2004A: 1,700 5.000%, 7/01/22 - MBIA Insured 7/14 at 100.00 AAA 1,765,161 1,700 5.000%, 7/01/23 - MBIA Insured 7/14 at 100.00 AAA 1,762,798 2,500 New Jersey Turnpike Authority, Revenue Bonds, Series 2003A, 7/13 at 100.00 AAA 2,604,550 5.000%, 1/01/19 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 5,900 Total New Jersey 6,132,509 ------------------------------------------------------------------------------------------------------------------------------------ NEW MEXICO - 1.1% (0.7% OF TOTAL INVESTMENTS) New Mexico Finance Authority, Public Project Revolving Fund Revenue Bonds, Series 2004C: 1,420 5.000%, 6/01/22 - AMBAC Insured 6/14 at 100.00 AAA 1,478,887 3,290 5.000%, 6/01/23 - AMBAC Insured 6/14 at 100.00 AAA 3,419,626 1,530 New Mexico State University, Revenue Bonds, Series 2004, 4/14 at 100.00 AAA 1,589,257 5.000%, 4/01/23 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 6,240 Total New Mexico 6,487,770 ------------------------------------------------------------------------------------------------------------------------------------ NEW YORK - 17.5% (11.4% OF TOTAL INVESTMENTS) 11,760 Dormitory Authority of the State of New York, New York City, 5/10 at 101.00 AAA 12,782,767 Lease Revenue Bonds, Court Facilities, Series 1999, 5.750%, 5/15/30 (Pre-refunded 5/15/10) - AMBAC Insured 1,100 Dormitory Authority of the State of New York, Revenue Bonds, 2/15 at 100.00 AAA 1,141,547 Mental Health Services Facilities Improvements, Series 2005A, 5.000%, 2/15/24 - AMBAC Insured 15,000 Dormitory Authority of the State of New York, Revenue Bonds, 10/12 at 100.00 AAA 16,241,100 School Districts Financing Program, Series 2002D, 5.500%, 10/01/17 - MBIA Insured 5,000 Long Island Power Authority, New York, Electric System General 6/16 at 100.00 AAA 5,211,100 Revenue Bonds, Series 2006A, 5.000%, 12/01/25 - FGIC Insured 8,000 Metropolitan Transportation Authority, New York, State Service 7/12 at 100.00 AAA 8,257,920 Contract Refunding Bonds, Series 2002A, 5.000%, 7/01/25 - FGIC Insured New York City Sales Tax Asset Receivable Corporation, New York, Dedicated Revenue Bonds, Local Government Assistance Corporation, Series 2004A: 5,000 5.000%, 10/15/22 - MBIA Insured 10/14 at 100.00 AAA 5,233,400 1,630 5.000%, 10/15/24 - MBIA Insured 10/14 at 100.00 AAA 1,700,220 1,675 5.000%, 10/15/25 - MBIA Insured 10/14 at 100.00 AAA 1,747,159 10,615 New York State Housing Finance Agency, Mortgage Revenue 5/06 at 102.00 AAA 10,847,575 Refunding Bonds, Housing Project, Series 1996A, 6.125%, 11/01/20 - FSA Insured 4,200 New York State Mortgage Agency, Homeowner Mortgage 10/09 at 100.00 AAA 4,311,426 Revenue Bonds, Series 82, 5.550%, 10/01/19 - MBIA Insured (Alternative Minimum Tax) 10,120 New York State Thruway Authority, General Revenue Bonds, 7/15 at 100.00 AAA 10,531,074 Series 2005G, 5.000%, 1/01/26 - FSA Insured 1,950 New York State Thruway Authority, Highway and Bridge Trust 10/15 at 100.00 AAA 2,044,770 Fund Bonds, Second Generation, Series 2005B, 5.000%, 4/01/21 - AMBAC Insured New York State Thruway Authority, State Personal Income Tax Revenue Bonds, Series 2005A: 3,500 5.000%, 3/15/19 - FSA Insured 3/15 at 100.00 AAA 3,675,140 6,595 5.000%, 3/15/25 - FSA Insured 3/15 at 100.00 AAA 6,860,844 New York State Urban Development Corporation, Service Contract Revenue Bonds, Series 2005B: 2,460 5.000%, 3/15/24 - FSA Insured 3/15 at 100.00 AAA 2,562,828 2,465 5.000%, 3/15/25 - FSA Insured 3/15 at 100.00 AAA 2,564,364 5,000 Triborough Bridge and Tunnel Authority, New York, Subordinate 11/13 at 100.00 AAA 5,143,850 Lien General Purpose Revenue Bonds, Series 2003A, 5.000%, 11/15/32 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 96,070 Total New York 100,857,084 ------------------------------------------------------------------------------------------------------------------------------------ 22 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ OHIO - 2.8% (1.8% OF TOTAL INVESTMENTS) $ 7,000 Cleveland State University, Ohio, General Receipts Bonds, 6/14 at 100.00 AAA $ 7,464,940 Series 2004, 5.250%, 6/01/19 - FGIC Insured 5,000 Lorain County, Ohio, Health Facilities Revenue Bonds, Catholic 9/09 at 102.00 AAA 5,303,550 Healthcare Partners, Series 1999A, 5.500%, 9/01/29 - AMBAC Insured 3,065 Oak Hills Local School District, Hamilton County, Ohio, General 12/15 at 100.00 AAA 3,194,098 Obligation Bonds, Series 2005, 5.000%, 12/01/24 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 15,065 Total Ohio 15,962,588 ------------------------------------------------------------------------------------------------------------------------------------ OKLAHOMA - 0.4% (0.3% OF TOTAL INVESTMENTS) 2,250 Oklahoma Capitol Improvement Authority, State Facilities Revenue 7/15 at 100.00 AAA 2,344,838 Bonds, Series 2005F, 5.000%, 7/01/24 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA - 3.0% (2.0% OF TOTAL INVESTMENTS) 3,000 Allegheny County Sanitary Authority, Pennsylvania, Sewerage 12/15 at 100.00 AAA 3,123,990 Revenue Bonds, Series 2005A, 5.000%, 12/01/23 - MBIA Insured 7,000 Allegheny County, Pennsylvania, Airport Revenue Refunding 1/08 at 101.00 AAA 7,157,920 Bonds, Pittsburgh International Airport, Series 1997A, 5.250%, 1/01/16 - MBIA Insured (Alternative Minimum Tax) Delaware County Authority, Pennsylvania, Revenue Bonds, Villanova University, Series 2006: 3,260 5.000%, 8/01/23 - AMBAC Insured 8/16 at 100.00 AAA 3,413,024 1,600 5.000%, 8/01/24 - AMBAC Insured 8/16 at 100.00 AAA 1,673,760 2,000 Pittsburgh Public Parking Authority, Pennsylvania, Parking 12/15 at 100.00 AAA 2,073,180 Revenue Bonds, Series 2005B, 5.000%, 12/01/23 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 16,860 Total Pennsylvania 17,441,874 ------------------------------------------------------------------------------------------------------------------------------------ PUERTO RICO - 1.4% (0.9% OF TOTAL INVESTMENTS) 2,500 Puerto Rico Electric Power Authority, Power Revenue Bonds, 7/15 at 100.00 AAA 2,628,475 Series 2005RR, 5.000%, 7/01/22 - FGIC Insured 5,000 Puerto Rico, Highway Revenue Bonds, Highway and No Opt. Call AAA 5,522,500 Transportation Authority, Series 2003AA, 5.500%, 7/01/16 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 7,500 Total Puerto Rico 8,150,975 ------------------------------------------------------------------------------------------------------------------------------------ SOUTH CAROLINA - 0.5% (0.4% OF TOTAL INVESTMENTS) 3,000 Charleston County School District, South Carolina, General 2/14 at 100.00 AAA 3,124,020 Obligation Bonds, Series 2004A, 5.000%, 2/01/22 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ TENNESSEE - 1.0% (0.6% OF TOTAL INVESTMENTS) Knox County Health, Educational and Housing Facilities Board, Tennessee, Hospital Revenue Refunding Bonds, Covenant Health, Series 2002A: 7,500 0.000%, 1/01/24 - FSA Insured 1/13 at 52.75 AAA 2,814,225 5,000 0.000%, 1/01/25 - FSA Insured 1/13 at 49.71 AAA 1,764,800 2,750 0.000%, 1/01/26 - FSA Insured 1/13 at 46.78 AAA 911,103 ------------------------------------------------------------------------------------------------------------------------------------ 15,250 Total Tennessee 5,490,128 ------------------------------------------------------------------------------------------------------------------------------------ TEXAS - 19.6% (12.8% OF TOTAL INVESTMENTS) 8,000 Abilene Health Facilities Development Corporation, Texas, 9/06 at 101.00 AAA 8,174,720 Hospital Revenue Refunding and Improvement Bonds, Hendrick Medical Center Project, Series 1995C, 6.150%, 9/01/25 - MBIA Insured 5,275 Austin, Texas, Combined Utility System Revenue Refunding 11/07 at 100.00 AAA 5,372,218 Bonds, Series 1997, 5.125%, 11/15/20 - FSA Insured 3,135 Corpus Christi, Texas, Utility System Revenue Bonds, 7/14 at 100.00 AAA 3,329,025 Series 2004, 5.250%, 7/15/20 - FSA Insured 3,000 Dallas-Ft. Worth International Airport, Texas, Joint Revenue 11/11 at 100.00 AAA 3,239,550 Refunding and Improvement Bonds, Series 2001A, 5.750%, 11/01/13 - FGIC Insured (Alternative Minimum Tax) 3,735 Grand Prairie Independent School District, Dallas County, 2/13 at 100.00 AAA 3,843,688 Texas, General Obligation Bonds, Series 2003, 5.125%, 2/15/31 - FSA Insured 23 Nuveen Insured Quality Municipal Fund, Inc. (NQI) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ TEXAS (continued) $ 1,865 Harris County Hospital District, Texas, Revenue Refunding No Opt. Call AAA $ 2,008,195 Bonds, Series 1990, 7.400%, 2/15/10 - AMBAC Insured 715 Harris County Hospital District, Texas, Revenue Refunding No Opt. Call AAA 760,374 Bonds, Series 1990, 7.400%, 2/15/10 - AMBAC Insured (ETM) 5,000 Houston, Texas, First Lien Combined Utility System Revenue 5/14 at 100.00 AAA 5,276,600 Bonds, Series 2004A, 5.250%, 5/15/24 - FGIC Insured 4,500 Houston, Texas, General Obligation Public Improvement Bonds, 3/11 at 100.00 AAA 4,648,230 Series 2001A, 5.000%, 3/01/22 - FSA Insured 17,000 Houston, Texas, Junior Lien Water and Sewerage System No Opt. Call AAA 20,089,240 Revenue Refunding Bonds, Series 2002A, 5.750%, 12/01/32 - FSA Insured (ETM) 4,685 Houston, Texas, Subordinate Lien Airport System Revenue 7/10 at 100.00 AAA 4,895,638 Bonds, Series 2000A, 5.500%, 7/01/19 - FSA Insured (Alternative Minimum Tax) 19,200 Jefferson County Health Facilities Development Corporation, 8/11 at 100.00 AAA 19,980,288 Texas, FHA-Insured Mortgage Revenue Bonds, Baptist Hospital of Southeast Texas, Series 2001, 5.400%, 8/15/31 - AMBAC Insured 6,000 Laredo Community College District, Texas, Limited Tax General 8/10 at 100.00 AAA 6,378,840 Obligation Bonds, Series 2001, 5.375%, 8/01/31 (Pre-refunded 8/01/10) - AMBAC Insured 2,000 Laredo Independent School District Public Facilities Corporation, 8/11 at 100.00 AAA 2,039,180 Texas, Lease Revenue Bonds, Series 2004A, 5.000%, 8/01/24 - AMBAC Insured 22,045 North Central Texas Health Facilities Development Corporation, 8/12 at 101.00 AAA 22,878,962 Revenue Bonds, Children's Medical Center of Dallas, Series 2002, 5.250%, 8/15/32 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 106,155 Total Texas 112,914,748 ------------------------------------------------------------------------------------------------------------------------------------ UTAH - 0.4% (0.2% OF TOTAL INVESTMENTS) 1,660 Salt Lake City, Utah, Hospital Revenue Refunding Bonds, IHC 5/06 at 100.00 AAA 1,693,715 Hospitals Inc., Series 1988A, 8.000%, 5/15/07 (ETM) ------------------------------------------------------------------------------------------------------------------------------------ WASHINGTON - 11.1% (7.2% OF TOTAL INVESTMENTS) 10,730 Chelan County Public Utility District 1, Washington, Hydro 7/11 at 101.00 AAA 11,430,669 Consolidated System Revenue Refunding Bonds, Series 2001C, 5.650%, 7/01/32 - MBIA Insured (Alternative Minimum Tax) 15,025 Seattle Housing Authority, Washington, GNMA Collateralized 11/11 at 105.00 AAA 16,760,237 Mortgage Loan Low Income Housing Assistance Revenue Bonds, Park Place Project, Series 2000A, 7.000%, 5/20/42 4,625 Seattle Housing Authority, Washington, GNMA Collateralized 9/11 at 102.00 AAA 4,990,976 Mortgage Loan Low Income Housing Assistance Revenue Bonds, RHF/Esperanza Apartments Project, Series 2000A, 6.125%, 3/20/42 (Alternative Minimum Tax) 5,000 Seattle, Washington, Municipal Light and Power Revenue Bonds, 12/10 at 100.00 AAA 5,240,800 Series 2000, 5.250%, 12/01/21 - FSA Insured 11,750 Washington Public Power Supply System, Revenue Refunding 7/08 at 102.00 AAA 12,191,213 Bonds, Nuclear Project 1, Series 1998A, 5.125%, 7/01/17 - MBIA Insured 2,500 Washington State Healthcare Facilities Authority, Revenue 12/09 at 101.00 AAA 2,618,425 Bonds, Providence Services, Series 1999, 5.375%, 12/01/19 - MBIA Insured 10,000 Washington, General Obligation Refunding Bonds, 1/12 at 100.00 AAA 10,373,600 Series R-2003A, 5.000%, 1/01/19 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 59,630 Total Washington 63,605,920 ------------------------------------------------------------------------------------------------------------------------------------ WEST VIRGINIA - 2.4% (1.5% OF TOTAL INVESTMENTS) 12,845 West Virginia Water Development Authority, Infrastructure 10/10 at 100.00 AAA 13,608,250 Revenue Bonds, Infrastructure and Jobs Development Council Program, Series 2000A, 5.500%, 10/01/39 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 24 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ WISCONSIN - 0.7% (0.5% OF TOTAL INVESTMENTS) $ 2,180 Green Bay, Wisconsin, Water System Revenue Bonds, 11/14 at 100.00 Aaa $ 2,257,128 Series 2004, 5.000%, 11/01/26 - FSA Insured 1,675 Wisconsin Public Power Incorporated System, Power Supply 7/15 at 100.00 AAA 1,727,746 System Revenue Bonds, Series 2005A, 5.000%, 7/01/30 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 3,855 Total Wisconsin 3,984,874 ------------------------------------------------------------------------------------------------------------------------------------ $ 930,255 Total Investments (cost $842,621,523) - 153.3% 882,450,905 =============----------------------------------------------------------------------------------------------------------------------- Other Assets Less Liabilities - 2.0% 11,047,495 -------------------------------------------------------------------------------------------------------------------- Preferred Shares, at Liquidation Value - (55.3)% (318,000,000) -------------------------------------------------------------------------------------------------------------------- Net Assets Applicable to Common Shares - 100% $ 575,498,400 ==================================================================================================================== All of the bonds in the Portfolio of Investments are either covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance, or are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, any of which ensure the timely payment of principal and interest. (1) All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted. (2) Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns. (3) Ratings: Using the higher of Standard & Poor's or Moody's rating. Ratings below BBB by Standard & Poor's Group or Baa by Moody's Investor Service, Inc. are considered to be below investment grade. (ETM) Escrowed to maturity. See accompanying notes to financial statements. 25 Nuveen Insured Municipal Opportunity Fund, Inc. (NIO) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ALABAMA - 11.0% (7.1% OF TOTAL INVESTMENTS) Birmingham Special Care Facilities Financing Authority, Alabama, Revenue Bonds, Baptist Health System Inc., Series 1996A: $ 7,465 5.875%, 11/15/19 (Pre-refunded 11/15/06) - MBIA Insured 11/06 at 102.00 AAA $ 7,699,774 1,750 5.875%, 11/15/26 (Pre-refunded 11/15/06) - MBIA Insured 11/06 at 102.00 AAA 1,805,038 11,175 Hoover Board of Education, Alabama, Capital Outlay Tax 2/11 at 100.00 AAA 11,706,483 Anticipation Warrants, Series 2001, 5.250%, 2/15/22 - MBIA Insured Jefferson County, Alabama, Sewer Revenue Capital Improvement Warrants, Series 1999A: 10,815 5.000%, 2/01/33 (Pre-refunded 2/01/09) - FGIC Insured 2/09 at 101.00 AAA 11,262,525 9,790 5.000%, 2/01/33 (Pre-refunded 2/01/09) - FGIC Insured 2/09 at 101.00 AAA 10,205,586 29,860 5.750%, 2/01/38 (Pre-refunded 2/01/09) - FGIC Insured 2/09 at 101.00 AAA 31,709,528 2,500 Jefferson County, Alabama, Sewer Revenue Capital Improvement 8/12 at 100.00 AAA 2,673,050 Warrants, Series 2002B, 5.125%, 2/01/42 (Pre-refunded 8/01/12) - FGIC Insured Jefferson County, Alabama, Sewer Revenue Capital Improvement Warrants, Series 2002D: 425 5.000%, 2/01/38 (Pre-refunded 8/01/12) - FGIC Insured 8/12 at 100.00 AAA 450,037 14,800 5.000%, 2/01/42 (Pre-refunded 8/01/12) - FGIC Insured 8/12 at 100.00 AAA 15,722,484 18,760 Jefferson County, Alabama, Sewer Revenue Capitol Improvement 2/11 at 101.00 AAA 19,880,535 Warrants, Series 2001A, 5.000%, 2/01/41 (Pre-refunded 2/01/11) - FGIC Insured 10,195 Jefferson County, Alabama, Sewer Revenue Refunding Warrants, 2/07 at 100.00 AAA 10,304,086 Series 1997A, 5.375%, 2/01/27 - FGIC Insured 5,240 Jefferson County, Alabama, Sewer Revenue Refunding Warrants, 2/11 at 101.00 AAA 5,564,775 Series 2003B, 5.000%, 2/01/41 (Pre-refunded 2/01/11) - FGIC Insured 6,000 University of Alabama, Tuscaloosa, General Revenue Bonds, 7/14 at 100.00 AAA 6,196,740 Series 2004A, 5.000%, 7/01/29 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 128,775 Total Alabama 135,180,641 ------------------------------------------------------------------------------------------------------------------------------------ ALASKA - 1.5% (0.9% OF TOTAL INVESTMENTS) 3,190 Alaska Housing Finance Corporation, Collateralized Veterans 12/09 at 100.00 AAA 3,307,807 Mortgage Program Bonds, First Series 1999A-1, 6.150%, 6/01/39 11,245 Alaska Housing Finance Corporation, General Mortgage Revenue 6/09 at 100.00 AAA 11,548,952 Bonds, Series 1999A, 6.050%, 6/01/39 - MBIA Insured 3,000 Alaska Student Loan Corporation, Student Loan Revenue Bonds, 7/08 at 100.00 AAA 3,053,070 Series 1998A, 5.250%, 7/01/14 - AMBAC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 17,435 Total Alaska 17,909,829 ------------------------------------------------------------------------------------------------------------------------------------ ARIZONA - 2.1% (1.4% OF TOTAL INVESTMENTS) Arizona State University, Certificates of Participation, Resh Infrastructure Projects, Series 2005A: 2,000 5.000%, 9/01/25 - AMBAC Insured 3/15 at 100.00 AAA 2,069,960 2,000 5.000%, 9/01/27 - AMBAC Insured 3/15 at 100.00 AAA 2,061,120 1,000 Arizona State University, System Revenue Bonds, Series 2005, 7/15 at 100.00 AAA 1,036,040 5.000%, 7/01/27 - AMBAC Insured 1,000 Maricopa County Union High School District 210, Phoenix, 7/14 at 100.00 AAA 1,042,510 Arizona, General Obligation Bonds, Series 2004A, 5.000%, 7/01/22 - FSA Insured 1,150 Phoenix Civic Improvement Corporation, Arizona, Junior Lien 7/14 at 100.00 AAA 1,189,296 Wastewater System Revenue Bonds, Series 2004, 5.000%, 7/01/27 - MBIA Insured 13,490 Phoenix Civic Improvement Corporation, Arizona, Junior Lien 7/15 at 100.00 AAA 13,704,896 Water System Revenue Bonds, Series 2005, 4.750%, 7/01/25 - MBIA Insured 26 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ARIZONA (continued) $ 4,815 Pima County Industrial Development Authority, Arizona, Lease 7/06 at 101.00 AAA $ 4,845,142 Obligation Revenue Refunding Bonds, Tucson Electric Power Company, Series 1988A, 7.250%, 7/15/10 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 25,455 Total Arizona 25,948,964 ------------------------------------------------------------------------------------------------------------------------------------ ARKANSAS - 0.7% (0.5% OF TOTAL INVESTMENTS) 3,660 Arkansas State University, Student Fee Revenue Bonds, Beebe 9/15 at 100.00 Aaa 3,776,937 Campus, Series 2006, 5.000%, 9/01/35 - AMBAC Insured Pulaski County, Arkansas, Hospital Revenue Bonds, Arkansas Children's Hospital, Series 2005: 2,000 5.000%, 3/01/25 - AMBAC Insured 3/15 at 100.00 AAA 2,060,380 3,000 5.000%, 3/01/30 - AMBAC Insured 3/15 at 100.00 AAA 3,079,620 ------------------------------------------------------------------------------------------------------------------------------------ 8,660 Total Arkansas 8,916,937 ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA - 29.8% (19.3% OF TOTAL INVESTMENTS) 10,000 California Department of Veterans Affairs, Home Purchase 6/12 at 101.00 AAA 10,577,100 Revenue Bonds, Series 2002A, 5.300%, 12/01/21 - AMBAC Insured California Department of Water Resources, Power Supply Revenue Bonds, Series 2002A: 30,000 5.375%, 5/01/17 (Pre-refunded 5/01/12) - XLCA Insured 5/12 at 101.00 AAA 32,861,099 35,000 5.375%, 5/01/18 (Pre-refunded 5/01/12) - AMBAC Insured 5/12 at 101.00 AAA 38,337,949 California Department of Water Resources, Water System Revenue Bonds, Central Valley Project, Series 2005AC: 3,700 5.000%, 12/01/24 - MBIA Insured 12/14 at 100.00 AAA 3,847,852 2,820 5.000%, 12/01/27 - MBIA Insured 12/14 at 100.00 AAA 2,918,418 California Rural Home Mortgage Finance Authority, GNMA Mortgage-Backed Securities Program Single Family Mortgage Revenue Bonds, Series 1996A: 50 7.550%, 11/01/26 (Alternative Minimum Tax) No Opt. Call AAA 51,534 45 7.750%, 5/01/27 (Alternative Minimum Tax) No Opt. Call AAA 46,456 4,500 California, General Obligation Bonds, Series 1998, 10/08 at 101.00 AAA 4,645,485 5.000%, 10/01/19 - FGIC Insured 10,150 California, General Obligation Bonds, Series 2004, 12/14 at 100.00 AAA 10,460,488 5.000%, 6/01/31 - AMBAC Insured 3,500 Coachella Valley Unified School District, Riverside County, 8/15 at 100.00 AAA 3,643,185 California, General Obligation Bonds, Series 2005A, 5.000%, 8/01/26 - FGIC Insured 20,000 Cucamonga County Water District, San Bernardino County, 9/11 at 101.00 AAA 20,686,200 California, Certificates of Participation, Water Shares Purchase, Series 2000, 5.125%, 9/01/35 - FGIC Insured 5,750 East Bay Municipal Utility District, Alameda and Contra Costa 6/15 at 100.00 AAA 5,964,532 Counties, California, Water System Subordinated Revenue Bonds, Series 2005A, 5.000%, 6/01/27 - MBIA Insured 10,000 Golden State Tobacco Securitization Corporation, California, 6/15 at 100.00 AAA 10,208,300 Tobacco Settlement Asset-Backed Revenue Bonds, Series 2005A, 5.000%, 6/01/38 - FGIC Insured 4,000 Kern Community College District, California, General Obligation 11/15 at 100.00 AAA 4,202,280 Bonds, Series 2005, 5.000%, 11/01/20 - FSA Insured 5,000 Long Beach Bond Financing Authority, California, Lease Revenue 11/11 at 101.00 AAA 5,231,050 Refunding Bonds, Long Beach Aquarium of the South Pacific, Series 2001, 5.250%, 11/01/30 - AMBAC Insured 1,875 Los Angeles Department of Water and Power, California, 7/16 at 100.00 AAA 1,946,869 Waterworks Revenue Bonds, Series 2006A-1, 5.000%, 7/01/36 - AMBAC Insured 2,740 Los Angeles Harbors Department, California, Revenue Bonds, 8/16 at 102.00 AAA 2,855,984 Series 2006A, 5.000%, 8/01/22 (WI/DD, Settling 5/04/06) - FGIC Insured (Alternative Minimum Tax) 20,000 Los Angeles Unified School District, California, General 7/13 at 100.00 AAA 20,761,400 Obligation Bonds, Series 2003A, 5.000%, 7/01/21 - FSA Insured 2,000 Los Angeles Unified School District, California, General 7/15 at 100.00 AAA 2,088,900 Obligation Bonds, Series 2005A-2, 5.000%, 7/01/23 - MBIA Insured 3,000 Los Angeles Unified School District, California, General 7/16 at 100.00 AAA 3,139,920 Obligation Bonds, Series 2006F, 5.000%, 7/01/24 - FGIC Insured 6,205 Port of Oakland, California, Revenue Bonds, Series 2002L, 11/12 at 100.00 AAA 6,355,471 5.000%, 11/01/22 - FGIC Insured (Alternative Minimum Tax) 27 Nuveen Insured Municipal Opportunity Fund, Inc. (NIO) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA (continued) Poway Redevelopment Agency, California, Tax Allocation Bonds, Paguay Redevelopment Project, Series 2001: $ 15,000 5.200%, 6/15/30 - AMBAC Insured 12/11 at 101.00 AAA $ 15,615,450 5,000 5.125%, 6/15/33 - AMBAC Insured 12/11 at 101.00 AAA 5,152,600 2,035 Redding, California, Electric System Revenue Certificates 6/15 at 100.00 AAA 2,091,024 of Participation, Series 2005, 5.000%, 6/01/30 - FGIC Insured 6,000 Redlands Unified School District, San Bernardino County, 7/13 at 100.00 AAA 6,198,540 California, General Obligation Bonds, Series 2003, 5.000%, 7/01/26 - FSA Insured 2,285 Rio Hondo Community College District, California, General 8/15 at 100.00 AAA 2,397,948 Obligation Bonds, Series 2005A, 5.000%, 8/01/20 - FGIC Insured 2,970 Riverside Community College District, California, General 8/15 at 100.00 AAA 3,107,570 Obligation Bonds, Series 2005, 5.000%, 8/01/22 - FSA Insured 2,500 Sacramento County Sanitation District Financing Authority, 12/15 at 100.00 AAA 2,564,825 California, Revenue Bonds, Series 2005B, 4.750%, 12/01/21 - FGIC Insured 6,500 Salinas, California, GNMA Collateralized Housing Facility 7/06 at 100.00 AAA 6,522,230 Revenue Refunding Bonds, Villa Serra Project, Series 1994A, 6.600%, 7/20/30 13,710 San Francisco Airports Commission, California, Revenue 5/11 at 100.00 AAA 14,101,421 Refunding Bonds, San Francisco International Airport, Second Series 2001, Issue 27A, 5.250%, 5/01/26 - MBIA Insured (Alternative Minimum Tax) 11,500 San Francisco Bay Area Rapid Transit District, California, Sales 7/11 at 100.00 AAA 11,809,120 Tax Revenue Bonds, Series 2001, 5.125%, 7/01/36 - AMBAC Insured San Francisco Bay Area Rapid Transit District, California, Sales Tax Revenue Bonds, Series 2005A: 1,165 5.000%, 7/01/21 - MBIA Insured 7/15 at 100.00 AAA 1,219,475 1,220 5.000%, 7/01/22 - MBIA Insured 7/15 at 100.00 AAA 1,276,108 1,280 5.000%, 7/01/23 - MBIA Insured 7/15 at 100.00 AAA 1,336,896 66,685 San Joaquin Hills Transportation Corridor Agency, Orange No Opt. Call AAA 33,579,898 County, California, Senior Lien Toll Road Revenue Bonds, Series 1993, 0.000%, 1/01/21 (ETM) San Joaquin Hills Transportation Corridor Agency, Orange County, California, Toll Road Revenue Refunding Bonds, Series 1997A: 31,615 5.250%, 1/15/30 - MBIA Insured 1/07 at 102.00 AAA 32,528,041 21,500 0.000%, 1/15/32 - MBIA Insured No Opt. Call AAA 6,023,440 12,525 San Jose Redevelopment Agency, California, Tax Allocation 8/10 at 101.00 AAA 12,847,519 Bonds, Merged Area Redevelopment Project, Series 2002, 5.000%, 8/01/20 - MBIA Insured 11,000 Santa Ana Financing Authority, California, Lease Revenue No Opt. Call AAA 13,287,010 Bonds, Police Administration and Housing Facility, Series 1994A, 6.250%, 7/01/24 - MBIA Insured 5,000 Walnut Energy Center Authority, California, Electric Revenue 1/14 at 100.00 AAA 5,116,400 Bonds, Turlock Irrigation District, Series 2004A, 5.000%, 1/01/34 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 399,825 Total California 367,605,987 ------------------------------------------------------------------------------------------------------------------------------------ COLORADO - 7.2% (4.6% OF TOTAL INVESTMENTS) 1,080 Arkansas River Power Authority, Colorado, Power Revenue 10/16 at 100.00 AAA 1,136,203 Bonds, Series 2006, 5.250%, 10/01/40 - XLCA Insured 1,900 Aspen, Colorado, Sales Tax Revenue Bonds, Parks and Open 11/15 at 100.00 AAA 2,031,233 Space, Series 2005B, 5.250%, 11/01/24 - FSA Insured 1,000 Colorado Department of Transportation, Certificates of 6/14 at 100.00 AAA 1,031,960 Participation, Series 2004, 5.000%, 6/15/25 - MBIA Insured 10,545 Denver City and County, Colorado, Airport System Revenue 11/06 at 101.00 AAA 10,740,188 Bonds, Series 1996D, 5.500%, 11/15/25 - MBIA Insured 4,950 Denver Convention Center Hotel Authority, Colorado, Senior 12/13 at 100.00 AAA 5,247,198 Revenue Bonds, Convention Center Hotel, Series 2003A, 5.000%, 12/01/33 (Pre-refunded 12/01/13) - XLCA Insured 1,740 Douglas County School District RE1, Douglas and Elbert 12/14 at 100.00 Aaa 1,799,682 Counties, Colorado, General Obligation Bonds, Series 2005B, 5.000%, 12/15/28 - FSA Insured 28 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ COLORADO (continued) $ 35,995 E-470 Public Highway Authority, Colorado, Senior Revenue No Opt. Call AAA $ 15,521,044 Bonds, Series 1997B, 0.000%, 9/01/23 - MBIA Insured 30,800 E-470 Public Highway Authority, Colorado, Senior Revenue 9/10 at 102.00 AAA 33,547,667 Bonds, Series 2000A, 5.750%, 9/01/35 - MBIA Insured 11,800 E-470 Public Highway Authority, Colorado, Senior Revenue 9/10 at 74.80 AAA 7,452,054 Bonds, Series 2000B, 0.000%, 9/01/15 (Pre-refunded 9/01/10) - MBIA Insured 10,000 E-470 Public Highway Authority, Colorado, Toll Revenue Bonds, No Opt. Call AAA 3,478,300 Series 2004A, 0.000%, 9/01/27 - MBIA Insured 2,750 Jefferson County School District R1, Colorado, General Obligation 12/14 at 100.00 AAA 2,862,283 Bonds, Series 2004, 5.000%, 12/15/24 - FSA Insured 2,500 Summit County School District RE-1, Summit, Colorado, General 12/14 at 100.00 Aaa 2,603,525 Obligation Bonds, Series 2004B, 5.000%, 12/01/24 - FGIC Insured 1,000 University of Colorado, Enterprise System Revenue Bonds, 6/15 at 100.00 AAA 1,035,800 Series 2005, 5.000%, 6/01/30 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 116,060 Total Colorado 88,487,137 ------------------------------------------------------------------------------------------------------------------------------------ CONNECTICUT - 0.5% (0.3% OF TOTAL INVESTMENTS) 2,100 Connecticut Health and Educational Facilities Authority, 11/15 at 100.00 AAA 2,216,256 Revenue Bonds, Connecticut State University System, Series 2005G, 5.000%, 11/01/19 - FSA Insured 4,000 Connecticut, General Obligation Bonds, Series 2004D, 12/14 at 100.00 AAA 4,177,280 5.000%, 12/01/24 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 6,100 Total Connecticut 6,393,536 ------------------------------------------------------------------------------------------------------------------------------------ DELAWARE - 0.3% (0.2% OF TOTAL INVESTMENTS) 3,400 Delaware River and Bay Authority, Delaware and 1/15 at 100.00 AAA 3,541,848 New Jersey, Revenue Bonds, Series 2005, 5.000%, 1/01/24 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ DISTRICT OF COLUMBIA - 1.0% (0.6% OF TOTAL INVESTMENTS) 1,895 District of Columbia Housing Finance Agency, GNMA 6/06 at 100.00 AAA 1,899,396 Collateralized Single Family Mortgage Revenue Bonds, Series 1990B, 7.100%, 12/01/24 (Alternative Minimum Tax) District of Columbia Water and Sewerage Authority, Subordinate Lien Public Utility Revenue Bonds, Series 2003: 5,000 5.125%, 10/01/24 - FGIC Insured 10/13 at 100.00 AAA 5,209,650 5,000 5.125%, 10/01/25 - FGIC Insured 10/13 at 100.00 AAA 5,203,550 ------------------------------------------------------------------------------------------------------------------------------------ 11,895 Total District Of Columbia 12,312,596 ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA - 6.3% (4.1% OF TOTAL INVESTMENTS) 6,020 Board of Regents, Florida State University, Housing Facility 5/15 at 101.00 AAA 6,243,161 Revenue Bonds, Series 2005A, 5.000%, 5/01/27 - MBIA Insured 1,000 Hillsborough County School Board, Florida, Certificates of 7/15 at 100.00 AAA 1,033,760 Participation, Master Lease Program, Series 2005A, 5.000%, 7/01/26 - MBIA Insured Indian Trace Development District, Florida, Water Management Special Benefit Assessment Bonds, Series 2005: 645 5.000%, 5/01/25 - MBIA Insured 5/15 at 102.00 Aaa 673,606 1,830 5.000%, 5/01/27 - MBIA Insured 5/15 at 102.00 Aaa 1,903,090 4,425 Jacksonville Economic Development Commission, Florida, 11/12 at 100.00 AAA 4,748,866 Healthcare Facilities Revenue Bonds, Mayo Clinic, Series 2001C, 5.500%, 11/15/36 - MBIA Insured 1,505 Lee County, Florida, Transportation Facilities Revenue Bonds, 10/14 at 100.00 AAA 1,572,800 Series 2004B, 5.000%, 10/01/21 - AMBAC Insured 2,000 Marco Island, Florida, Water Utility System Revenue Bonds, 10/13 at 100.00 AAA 2,063,100 Series 2003, 5.000%, 10/01/27 - MBIA Insured 2,150 Miami-Dade County, Florida, Aviation Revenue Bonds, 10/12 at 100.00 AAA 2,196,139 Miami International Airport, Series 2002A, 5.125%, 10/01/35 - FSA Insured (Alternative Minimum Tax) 35,920 Miami-Dade County, Florida, Aviation Revenue Bonds, Miami 10/12 at 100.00 AAA 37,399,185 International Airport, Series 2002, 5.375%, 10/01/32 - FGIC Insured (Alternative Minimum Tax) 29 Nuveen Insured Municipal Opportunity Fund, Inc. (NIO) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA (continued) $ 5,320 Miami-Dade County, Florida, Public Facilities Revenue Bonds, 6/15 at 100.00 AAA $ 5,508,434 Jackson Health System, Series 2005B, 5.000%, 6/01/25 - MBIA Insured Northern Palm Beach County Improvement District, Florida, Revenue Bonds, Water Control and Improvement Development Unit 9B, Series 2005: 1,290 5.000%, 8/01/23 - MBIA Insured 8/15 at 102.00 AAA 1,353,958 2,145 5.000%, 8/01/29 - MBIA Insured 8/15 at 102.00 AAA 2,228,205 Ocala, Florida, Utility System Revenue Bonds, Series 2005B: 1,025 5.250%, 10/01/24 - FGIC Insured 10/15 at 100.00 Aaa 1,099,364 2,590 5.000%, 10/01/27 - FGIC Insured 10/15 at 100.00 Aaa 2,679,433 2,320 Osceola County, Florida, Transportation Revenue Bonds, Osceola 4/14 at 100.00 Aaa 2,413,009 Parkway, Series 2004, 5.000%, 4/01/23 - MBIA Insured Plantation, Florida, Non-Ad Valorem Revenue Refunding and Improvement Bonds, Series 2003: 2,110 5.000%, 8/15/17 - FSA Insured 8/13 at 100.00 Aaa 2,211,639 2,225 5.000%, 8/15/18 - FSA Insured 8/13 at 100.00 Aaa 2,326,482 ------------------------------------------------------------------------------------------------------------------------------------ 74,520 Total Florida 77,654,231 ------------------------------------------------------------------------------------------------------------------------------------ GEORGIA - 1.0% (0.6% OF TOTAL INVESTMENTS) 1,000 Atlanta, Georgia, Water and Wastewater Revenue Bonds, 11/14 at 100.00 AAA 1,040,400 Series 2004, 5.000%, 11/01/22 - FSA Insured 1,520 College Park Business and Industrial Development Authority, 9/14 at 102.00 AAA 1,628,422 Georgia, Revenue Bonds, Public Safety Project, Series 2004, 5.250%, 9/01/23 - MBIA Insured Fulton County Development Authority, Georgia, Revenue Bonds, Georgia Tech Molecular Science Building, Series 2004: 1,695 5.250%, 5/01/19 - MBIA Insured 5/14 at 100.00 AAA 1,806,667 1,135 5.250%, 5/01/20 - MBIA Insured 5/14 at 100.00 AAA 1,208,979 4,500 5.000%, 5/01/36 - MBIA Insured 5/14 at 100.00 AAA 4,627,035 1,250 Glynn-Brunswick Memorial Hospital Authority, Georgia, Revenue 8/06 at 102.00 AAA 1,278,888 Bonds, Southeast Georgia Health Systems, Series 1996, 5.250%, 8/01/13 - MBIA Insured 640 Glynn-Brunswick Memorial Hospital Authority, Georgia, Revenue 8/06 at 102.00 AAA 655,181 Bonds, Southeast Georgia Health Systems, Series 1996, 5.250%, 8/01/13 (Pre-refunded 8/01/06) - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 11,740 Total Georgia 12,245,572 ------------------------------------------------------------------------------------------------------------------------------------ HAWAII - 3.3% (2.1% OF TOTAL INVESTMENTS) 24,250 Hawaii Department of Budget and Finance, Special Purpose 5/06 at 101.00 AAA 24,537,605 Revenue Bonds, Hawaiian Electric Company Inc., Series 1996A, 6.200%, 5/01/26 - MBIA Insured (Alternative Minimum Tax) Hawaii, General Obligation Bonds, Series 2005DF: 10,000 5.000%, 7/01/24 - AMBAC Insured 7/15 at 100.00 AAA 10,413,800 5,000 5.000%, 7/01/25 - AMBAC Insured 7/15 at 100.00 AAA 5,199,250 ------------------------------------------------------------------------------------------------------------------------------------ 39,250 Total Hawaii 40,150,655 ------------------------------------------------------------------------------------------------------------------------------------ IDAHO - 0.2% (0.2% OF TOTAL INVESTMENTS) 645 Idaho Housing Agency, Single Family Mortgage Senior Bonds, No Opt. Call Aa1 649,089 Series 1994B-1, 6.750%, 7/01/22 580 Idaho Housing Agency, Single Family Mortgage Senior Bonds, No Opt. Call Aa1 584,019 Series 1994B-2, 6.900%, 7/01/26 (Alternative Minimum Tax) 630 Idaho Housing Agency, Single Family Mortgage Senior Bonds, 7/06 at 101.00 Aaa 632,451 Series 1995B, 6.600%, 7/01/27 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 1,855 Total Idaho 1,865,559 ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS - 6.0% (3.9% OF TOTAL INVESTMENTS) 1,050 Bedford Park, Illinois, General Obligation Bonds, Series 2004A, 12/14 at 100.00 AAA 1,120,455 5.250%, 12/15/20 - FSA Insured Chicago, Illinois, Second Lien Passenger Facility Charge Revenue Refunding Bonds, O'Hare International Airport, Series 2001E: 4,615 5.500%, 1/01/17 - AMBAC Insured (Alternative Minimum Tax) 1/11 at 101.00 AAA 4,867,533 4,870 5.500%, 1/01/18 - AMBAC Insured (Alternative Minimum Tax) 1/11 at 101.00 AAA 5,136,486 30 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS (continued) $ 7,200 Chicago, Illinois, Third Lien General Airport Revenue Bonds, 1/16 at 100.00 AAA $ 7,657,128 O'Hare International Airport, Series 2005A, 5.250%, 1/01/24 - MBIA Insured 1,295 Eastern Illinois University, Auxiliary Facilities System Revenue 10/06 at 85.17 AAA 1,084,200 Bonds, Series 1989, 0.000%, 10/01/09 - MBIA Insured 10,000 Illinois Development Finance Authority, Revenue Bonds, Provena 5/08 at 101.00 AAA 10,354,100 Health, Series 1998A, 5.500%, 5/15/21 - MBIA Insured 2,095 Illinois Educational Facilities Authority, Revenue Bonds, Robert 12/07 at 100.00 Aaa 2,156,740 Morris College, Series 2000, 5.800%, 6/01/30 - MBIA Insured 4,500 Illinois Health Facilities Authority, Revenue Bonds, Alexian 1/09 at 101.00 AAA 4,683,015 Brothers Health System, Series 1999, 5.000%, 1/01/19 (Pre-refunded 1/01/09) - FSA Insured 7,000 Illinois Health Facilities Authority, Revenue Bonds, Hospital 6/08 at 101.00 Aaa 7,149,940 Sisters Services Inc. Obligated Group, Series 1998A, 5.000%, 6/01/18 - MBIA Insured 22,410 Illinois, General Obligation Bonds, Illinois FIRST Program, 2/12 at 100.00 AAA 23,133,843 Series 2002, 5.125%, 2/01/27 - FGIC Insured Schaumburg, Illinois, General Obligation Bonds, Series 2004B: 4,260 5.000%, 12/01/22 - FGIC Insured 12/14 at 100.00 AAA 4,427,162 2,365 5.000%, 12/01/23 - FGIC Insured 12/14 at 100.00 AAA 2,452,671 ------------------------------------------------------------------------------------------------------------------------------------ 71,660 Total Illinois 74,223,273 ------------------------------------------------------------------------------------------------------------------------------------ INDIANA - 2.7% (1.7% OF TOTAL INVESTMENTS) 2,030 Decatur Township-Marion County Multi-School Building 7/13 at 100.00 AAA 2,108,906 Corporation, Indiana, First Mortgage Bonds, Series 2003, 5.000%, 7/15/20 - FGIC Insured 20,000 Indianapolis Local Public Improvement Bond Bank, Indiana, No Opt. Call AAA 6,829,000 Series 1999E, 0.000%, 2/01/28 - AMBAC Insured 3,250 Indianapolis Local Public Improvement Bond Bank, Indiana, 7/12 at 100.00 AAA 3,491,312 Waterworks Project, Series 2002A, 5.250%, 7/01/33 (Pre-refunded 7/01/12) - MBIA Insured 1,340 Monroe-Gregg Grade School Building Corporation, Morgan 1/14 at 100.00 AAA 1,379,208 County, Indiana, First Mortgage Bonds, Series 2004, 5.000%, 1/15/25 - FSA Insured 5,000 Noblesville Redevelopment Authority, Indiana, Economic 7/13 at 100.00 AAA 5,122,800 Development Lease Rental Bonds, Exit 10 Project, Series 2003, 5.000%, 1/15/28 - AMBAC Insured 10,000 Purdue University, Indiana, Student Fee Bonds, Series 2002O, 1/12 at 100.00 AAA 10,363,900 5.000%, 7/01/19 - MBIA Insured 3,705 Whitley County Middle School Building Corporation, Columbia 7/13 at 100.00 AAA 3,915,222 City, Indiana, First Mortgage Bonds, Series 2003, 5.000%, 7/15/16 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 45,325 Total Indiana 33,210,348 ------------------------------------------------------------------------------------------------------------------------------------ KANSAS - 1.3% (0.8% OF TOTAL INVESTMENTS) 1,055 Butler County Unified School District 394, Kansas, General 9/14 at 100.00 AAA 1,103,614 Obligation Bonds, Series 2004, 5.000%, 9/01/20 - FSA Insured 2,055 Kansas Turnpike Authority, Revenue Bonds, Series 2004A-2, 9/14 at 101.00 AAA 2,153,763 5.000%, 9/01/23 - FSA Insured Neosho County Unified School District 413, Kansas, General Obligation Bonds, Series 2006: 2,145 5.000%, 9/01/27 - FSA Insured 9/14 at 100.00 Aaa 2,221,040 4,835 5.000%, 9/01/29 - FSA Insured 9/14 at 100.00 Aaa 4,996,199 5,000 University of Kansas Hospital Authority, Health Facilities Revenue 9/09 at 100.00 AAA 5,239,450 Bonds, KU Health System, Series 1999A, 5.650%, 9/01/29 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 15,090 Total Kansas 15,714,066 ------------------------------------------------------------------------------------------------------------------------------------ KENTUCKY - 2.1% (1.4% OF TOTAL INVESTMENTS) 3,870 Kenton County School District Finance Corporation, Kentucky, 6/14 at 100.00 Aaa 4,038,539 School Building Revenue Bonds, Series 2004, 5.000%, 6/01/20 - MBIA Insured 7,500 Kentucky Turnpike Authority, Economic Development Road 7/16 at 100.00 AAA 7,818,525 Revenue Bonds, Revitalization Project, Series 2006B, 5.000%, 7/01/25 (WI/DD, Settling 6/21/06) - AMBAC Insured 31 Nuveen Insured Municipal Opportunity Fund, Inc. (NIO) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ KENTUCKY (continued) $ 12,980 Louisville and Jefferson County Metropolitan Sewer District, 11/11 at 101.00 AAA $ 13,998,930 Kentucky, Sewer and Drainage System Revenue Bonds, Series 2001A, 5.500%, 5/15/34 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 24,350 Total Kentucky 25,855,994 ------------------------------------------------------------------------------------------------------------------------------------ LOUISIANA - 2.4% (1.5% OF TOTAL INVESTMENTS) 5,000 DeSoto Parish, Louisiana, Pollution Control Revenue Refunding 9/09 at 102.00 AAA 5,386,000 Bonds, Cleco Utility Group Inc. Project, Series 1999, 5.875%, 9/01/29 - AMBAC Insured 3,025 Lafayette City and Parish, Louisiana, Utilities Revenue Bonds, 11/14 at 100.00 AAA 3,217,995 Series 2004, 5.250%, 11/01/22 - MBIA Insured 1,640 Louisiana Public Facilities Authority, Revenue Bonds, Baton 7/14 at 100.00 AAA 1,728,986 Rouge General Hospital, Series 2004, 5.250%, 7/01/24 - MBIA Insured Louisiana, Gasoline and Fuels Tax Revenue Bonds, Series 2005A: 2,400 5.000%, 5/01/25 - FGIC Insured 5/15 at 100.00 AAA 2,474,616 4,415 5.000%, 5/01/26 - FGIC Insured 5/15 at 100.00 AAA 4,545,684 5,000 5.000%, 5/01/27 - FGIC Insured 5/15 at 100.00 AAA 5,159,150 6,455 Orleans Levee District, Louisiana, Levee District General 6/06 at 103.00 AAA 6,655,944 Obligation Bonds, Series 1986, 5.950%, 11/01/15 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 27,935 Total Louisiana 29,168,375 ------------------------------------------------------------------------------------------------------------------------------------ MAINE - 0.2% (0.2% OF TOTAL INVESTMENTS) 3,000 Maine Health and Higher Educational Facilities Authority, 7/13 at 100.00 AAA 3,077,040 Revenue Bonds, Series 2003B, 5.000%, 7/01/28 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ MARYLAND - 0.4% (0.3% OF TOTAL INVESTMENTS) 5,345 Baltimore, Maryland, Senior Lien Convention Center Hotel 9/16 at 100.00 AAA 5,702,901 Revenue Bonds, Series 2006A, 5.250%, 9/01/28 - XLCA Insured ------------------------------------------------------------------------------------------------------------------------------------ MASSACHUSETTS - 4.6% (3.0% OF TOTAL INVESTMENTS) 22,500 Massachusetts Development Finance Authority, Revenue Bonds, 1/12 at 101.00 AAA 24,456,150 WGBH Educational Foundation, Series 2002A, 5.375%, 1/01/42 (Pre-refunded 1/01/12) - AMBAC Insured 11,000 Massachusetts School Building Authority, Dedicated Sales 8/15 at 100.00 AAA 11,477,070 Tax Revenue Bonds, Series 2005A, 5.000%, 8/15/23 - FSA Insured 15,000 Massachusetts, Special Obligation Dedicated Tax Revenue 1/14 at 100.00 AAA 16,099,650 Bonds, Series 2004, 5.250%, 1/01/23 (Pre-refunded 1/01/14) - FGIC Insured University of Massachusetts Building Authority, Senior Lien Project Revenue Bonds, Series 2004-1: 1,500 5.375%, 11/01/20 (Pre-refunded 11/01/14) - AMBAC Insured 11/14 at 100.00 AAA 1,638,675 2,500 5.375%, 11/01/21 (Pre-refunded 11/01/14) - AMBAC Insured 11/14 at 100.00 AAA 2,731,125 ------------------------------------------------------------------------------------------------------------------------------------ 52,500 Total Massachusetts 56,402,670 ------------------------------------------------------------------------------------------------------------------------------------ MICHIGAN - 6.6% (4.2% OF TOTAL INVESTMENTS) 5,490 Detroit City School District, Wayne County, Michigan, Unlimited No Opt. Call AAA 6,631,426 Tax School Building and Site Improvement Bonds, Series 2001A, 6.000%, 5/01/29 - FSA Insured 6,000 Detroit, Michigan, General Obligation Bonds, Series 2001A-1, 10/11 at 100.00 AAA 6,385,020 5.375%, 4/01/18 - MBIA Insured 7,420 Detroit, Michigan, Senior Lien Water Supply System Revenue 7/07 at 101.00 AAA 7,534,045 Bonds, Series 1997A, 5.000%, 7/01/27 - MBIA Insured Detroit, Michigan, Sewerage Disposal System Revenue Bonds, Series 1999A: 15,825 5.750%, 7/01/26 (Pre-refunded 1/01/10) - FGIC Insured 1/10 at 101.00 AAA 17,047,798 20,000 5.875%, 7/01/27 (Pre-refunded 1/01/10) - FGIC Insured 1/10 at 101.00 AAA 21,626,800 8,000 Gaylord Community Schools, Otsego and Antrim Counties, 5/07 at 37.75 AAA 2,911,600 Michigan, School Building and Site Refunding Bonds, Series 1992, 0.000%, 5/01/21 (Pre-refunded 5/01/07) - MBIA Insured 1,085 Grand Rapids Community College, Kent County, Michigan, 5/13 at 100.00 AAA 1,150,838 General Obligation Refunding Bonds, Series 2003, 5.250%, 5/01/20 - AMBAC Insured 32 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ MICHIGAN (continued) $ 6,850 Wayne County, Michigan, Airport Revenue Bonds, Detroit 12/08 at 101.00 AAA $ 7,107,766 Metropolitan Wayne County Airport, Series 1998A, 5.375%, 12/01/15 - MBIA Insured (Alternative Minimum Tax) 10,000 Wayne County, Michigan, Limited Tax General Obligation 12/11 at 101.00 AAA 10,564,500 Airport Hotel Revenue Bonds, Detroit Metropolitan Wayne County Airport, Series 2001A, 5.250%, 12/01/25 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 80,670 Total Michigan 80,959,793 ------------------------------------------------------------------------------------------------------------------------------------ MINNESOTA - 1.1% (0.7% OF TOTAL INVESTMENTS) 13,020 St. Paul Housing and Redevelopment Authority, Minnesota, 12/11 at 102.00 Aaa 13,821,511 GNMA Collateralized Multifamily Housing Revenue Bonds, Marian Center Project, Series 2001A, 6.450%, 6/20/43 ------------------------------------------------------------------------------------------------------------------------------------ NEBRASKA - 0.1% (0.2% OF TOTAL INVESTMENTS) Nebraska Public Power District, General Revenue Bonds, Series 2005A: 1,000 5.000%, 1/01/24 - FSA Insured 1/15 at 100.00 AAA 1,040,990 1,000 5.000%, 1/01/25 - FSA Insured 1/15 at 100.00 AAA 1,040,260 ------------------------------------------------------------------------------------------------------------------------------------ 2,000 Total Nebraska 2,081,250 ------------------------------------------------------------------------------------------------------------------------------------ NEVADA - 8.4% (5.4% OF TOTAL INVESTMENTS) 12,105 Clark County, Nevada, General Obligation Bank Bonds, Southern 12/12 at 100.00 AAA 12,373,731 Nevada Water Authority Loan, Series 2002, 5.000%, 6/01/32 - MBIA Insured 7,370 Clark County, Nevada, Subordinate Lien Airport Revenue Bonds, 7/14 at 100.00 AAA 7,665,316 Series 2004A-2, 5.125%, 7/01/25 - FGIC Insured Director of Nevada State Department of Business and Industry, Revenue Bonds, Las Vegas Monorail Project, First Tier, Series 2000: 15,000 5.625%, 1/01/34 - AMBAC Insured 1/10 at 102.00 AAA 16,041,150 13,000 5.375%, 1/01/40 - AMBAC Insured 1/10 at 100.00 AAA 13,473,980 110 Nevada Housing Division, Single Family Mortgage Bonds, 10/06 at 100.00 Aa2 110,154 Senior Series 1994B-1, 6.700%, 10/01/17 85 Nevada Housing Division, Single Family Mortgage Bonds, 10/06 at 100.00 Aa2 85,036 Senior Series 1994B-2, 6.950%, 10/01/26 (Alternative Minimum Tax) 14,985 Reno, Nevada, Capital Improvement Revenue Bonds, 6/12 at 100.00 AAA 15,854,430 Series 2002, 5.375%, 6/01/32 - FGIC Insured 25,300 Reno, Nevada, Capital Improvement Revenue Bonds, 6/12 at 100.00 AAA 27,330,831 Series 2002, 5.375%, 6/01/32 (Pre-refunded 6/01/12) - FGIC Insured 10,000 Reno, Nevada, Senior Lien Sales and Room Tax Revenue Bonds, 6/12 at 100.00 AAA 10,668,200 Reno Transportation Rail Access Corridor Project, Series 2002, 5.125%, 6/01/27 (Pre-refunded 6/01/12) - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 97,955 Total Nevada 103,602,828 ------------------------------------------------------------------------------------------------------------------------------------ NEW JERSEY - 2.4% (1.5% OF TOTAL INVESTMENTS) Essex County Improvement Authority, New Jersey, Guaranteed Revenue Bonds, Project Consolidation, Series 2004: 2,000 5.125%, 10/01/21 - MBIA Insured 10/14 at 100.00 Aaa 2,104,680 2,250 5.125%, 10/01/22 - MBIA Insured 10/14 at 100.00 Aaa 2,366,145 New Jersey Economic Development Authority, Revenue Bonds, Motor Vehicle Surcharge, Series 2004A: 3,850 5.000%, 7/01/22 - MBIA Insured 7/14 at 100.00 AAA 3,997,571 3,850 5.000%, 7/01/23 - MBIA Insured 7/14 at 100.00 AAA 3,992,219 New Jersey Turnpike Authority, Revenue Bonds, Series 2003A: 8,250 5.000%, 1/01/19 - FGIC Insured 7/13 at 100.00 AAA 8,595,015 2,000 5.000%, 1/01/23 - FSA Insured 7/13 at 100.00 AAA 2,071,780 3,320 New Jersey Turnpike Authority, Revenue Bonds, Series 2005A, 1/15 at 100.00 AAA 3,463,391 5.000%, 1/01/21 - FSA Insured 2,795 Rutgers State University, New Jersey, Revenue Bonds, 5/14 at 100.00 AAA 2,907,163 Series 2004E, 5.000%, 5/01/22 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 28,315 Total New Jersey 29,497,964 ------------------------------------------------------------------------------------------------------------------------------------ NEW MEXICO - 0.3% (0.2% OF TOTAL INVESTMENTS) 3,660 San Juan County, New Mexico, Subordinate Gross Receipts 6/15 at 100.00 AAA 3,802,520 Tax Revenue Bonds, Series 2005, 5.000%, 6/15/25 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 33 Nuveen Insured Municipal Opportunity Fund, Inc. (NIO) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ NEW YORK - 9.6% (6.2% OF TOTAL INVESTMENTS) $ 1,880 Dormitory Authority of the State of New York, FHA-Insured 2/15 at 100.00 AAA $ 1,953,508 Mortgage Revenue Bonds, Montefiore Hospital, Series 2004, 5.000%, 8/01/23 - FGIC Insured 3,335 Dormitory Authority of the State of New York, State Personal 3/15 at 100.00 AAA 3,471,902 Income Tax Revenue Bonds, Series 2005F, 5.000%, 3/15/24 - AMBAC Insured 8,685 Long Island Power Authority, New York, Electric System General 6/08 at 101.00 AAA 9,052,202 Revenue Bonds, Series 1998A, 5.300%, 12/01/19 (Pre-refunded 6/01/08) - FSA Insured 12,500 Long Island Power Authority, New York, Electric System General 6/16 at 100.00 AAA 13,027,750 Revenue Bonds, Series 2006A, 5.000%, 12/01/25 - FGIC Insured Metropolitan Transportation Authority, New York, State Service Contract Refunding Bonds, Series 2002A: 2,500 5.000%, 7/01/21 - FGIC Insured 7/12 at 100.00 AAA 2,597,025 5,000 5.000%, 7/01/25 - FGIC Insured 7/12 at 100.00 AAA 5,161,200 1,500 New York City Municipal Water Finance Authority, New York, 6/15 at 100.00 AAA 1,561,845 Water and Sewerage System Revenue Bonds, Fiscal Series 2005C, 5.000%, 6/15/25 - MBIA Insured 10,000 New York City Municipal Water Finance Authority, New York, 6/15 at 100.00 AAA 10,336,400 Water and Sewerage System Revenue Bonds, Fiscal Series 2006A, 5.000%, 6/15/32 - FSA Insured New York City Sales Tax Asset Receivable Corporation, New York, Dedicated Revenue Bonds, Local Government Assistance Corporation, Series 2004A: 4,825 5.000%, 10/15/24 - MBIA Insured 10/14 at 100.00 AAA 5,032,861 1,665 5.000%, 10/15/25 - MBIA Insured 10/14 at 100.00 AAA 1,736,728 10,525 New York City, New York, General Obligation Bonds, Fiscal 4/15 at 100.00 AAA 10,919,688 Series 2005M, 5.000%, 4/01/26 - FGIC Insured 5,000 New York City, New York, General Obligation Bonds, Fiscal 9/15 at 100.00 AAA 5,225,550 Series 2006F-1, 5.000%, 9/01/21 - AMBAC Insured 5,000 New York State Thruway Authority, General Revenue Bonds, 1/15 at 100.00 AAA 5,194,000 Series 2005F, 5.000%, 1/01/26 - AMBAC Insured 3,000 New York State Thruway Authority, General Revenue Bonds, 7/15 at 100.00 AAA 3,020,910 Series 2005G, 4.750%, 1/01/29 - FSA Insured New York State Thruway Authority, Highway and Bridge Trust Fund Bonds, Second Generation, Series 2005B: 3,770 5.000%, 4/01/21 - AMBAC Insured 10/15 at 100.00 AAA 3,953,222 7,000 5.000%, 4/01/22 - AMBAC Insured 10/15 at 100.00 AAA 7,334,740 3,500 New York State Thruway Authority, State Personal Income Tax 3/15 at 100.00 AAA 3,675,140 Revenue Bonds, Series 2005A, 5.000%, 3/15/19 - FSA Insured 3,650 New York State Urban Development Corporation, Service 3/15 at 100.00 AAA 3,797,132 Contract Revenue Bonds, Series 2005B, 5.000%, 3/15/25 - FSA Insured New York State Urban Development Corporation, State Personal Income Tax Revenue Bonds, Series 2004A-1: 1,000 5.000%, 3/15/23 - FGIC Insured 3/14 at 100.00 AAA 1,037,860 5,000 5.000%, 3/15/25 - FGIC Insured 3/14 at 100.00 AAA 5,182,550 15,000 Triborough Bridge and Tunnel Authority, New York, Subordinate 11/12 at 100.00 AAA 15,382,350 Lien General Purpose Revenue Refunding Bonds, Series 2002E, 5.000%, 11/15/32 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 114,335 Total New York 118,654,563 ------------------------------------------------------------------------------------------------------------------------------------ NORTH CAROLINA - 1.4% (0.9% OF TOTAL INVESTMENTS) Mooresville, North Carolina, Enterprise System Revenue Bonds, Series 2004: 2,115 5.000%, 5/01/22 - FGIC Insured 5/14 at 100.00 AAA 2,203,492 2,575 5.000%, 5/01/26 - FGIC Insured 5/14 at 100.00 AAA 2,668,653 5,000 North Carolina Municipal Power Agency 1, Catawba Electric 1/13 at 100.00 AAA 5,341,550 Revenue Bonds, Series 2003A, 5.250%, 1/01/16 - FSA Insured 34 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ NORTH CAROLINA (continued) Raleigh Durham Airport Authority, North Carolina, Airport Revenue Bonds, Series 2005A: $ 3,205 5.000%, 5/01/23 - AMBAC Insured 5/15 at 100.00 Aaa $ 3,333,424 3,295 5.000%, 5/01/24 - AMBAC Insured 5/15 at 100.00 Aaa 3,424,559 ------------------------------------------------------------------------------------------------------------------------------------ 16,190 Total North Carolina 16,971,678 ------------------------------------------------------------------------------------------------------------------------------------ NORTH DAKOTA - 0.6% (0.4% OF TOTAL INVESTMENTS) Grand Forks, North Dakota, Sales Tax Revenue Bonds, Alerus Project, Series 2005A: 2,195 5.000%, 12/15/22 - MBIA Insured 12/15 at 100.00 Aaa 2,298,253 1,355 5.000%, 12/15/23 - MBIA Insured 12/15 at 100.00 Aaa 1,415,487 3,000 5.000%, 12/15/24 - MBIA Insured 12/15 at 100.00 Aaa 3,131,520 ------------------------------------------------------------------------------------------------------------------------------------ 6,550 Total North Dakota 6,845,260 ------------------------------------------------------------------------------------------------------------------------------------ OHIO - 2.9% (1.9% OF TOTAL INVESTMENTS) 2,650 Cleveland State University, Ohio, General Receipts Bonds, 6/14 at 100.00 AAA 2,818,540 Series 2004, 5.250%, 6/01/24 - FGIC Insured 2,000 Columbus City School District, Franklin County, Ohio, General 12/14 at 100.00 AAA 2,134,760 Obligation Bonds, Series 2004, 5.250%, 12/01/25 - FSA Insured 2,385 Columbus, Ohio, Tax Increment Financing Bonds, Easton 6/14 at 100.00 AAA 2,464,206 Project, Series 2004A, 5.000%, 12/01/22 - AMBAC Insured 2,205 Hamilton City School District, Ohio, General Obligation Bonds, 6/15 at 100.00 Aaa 2,300,653 Series 2005, 5.000%, 12/01/24 - MBIA Insured 20,100 Lucas County, Ohio, Hospital Revenue Bonds, ProMedica 11/09 at 101.00 AAA 21,050,529 Healthcare Obligated Group, Series 1999, 5.375%, 11/15/39 - AMBAC Insured 3,000 Ross Local School District, Butler County, Ohio, General 12/13 at 100.00 Aaa 3,094,470 Obligation Bonds, Series 2003, 5.000%, 12/01/28 - FSA Insured 1,530 Tallmadge City School District, Ohio, General Obligation 6/15 at 100.00 AAA 1,582,464 Bonds, Series 2005, 5.000%, 12/01/28 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 33,870 Total Ohio 35,445,622 ------------------------------------------------------------------------------------------------------------------------------------ OKLAHOMA - 1.8% (1.2% OF TOTAL INVESTMENTS) 3,500 Oklahoma Capitol Improvement Authority, State Facilities 7/15 at 100.00 AAA 3,647,525 Revenue Bonds, Series 2005F, 5.000%, 7/01/24 - AMBAC Insured 5,070 Oklahoma Housing Finance Agency, GNMA Collateralized Single No Opt. Call AAA 5,352,298 Family Mortgage Revenue Bonds, Series 1987A, 7.997%, 8/01/18 (Alternative Minimum Tax) 5,245 Oklahoma State Industries Authority, Revenue Bonds, Oklahoma 2/11 at 100.00 Aaa 5,474,679 Medical Research Foundation, Series 2001, 5.250%, 2/01/21 - AMBAC Insured 2,515 Oklahoma State University, Athletic Facilities Revenue Bonds, 8/14 at 100.00 AAA 2,589,595 Series 2004, 5.000%, 8/01/34 - AMBAC Insured 4,880 University of Oklahoma, Student Housing Revenue Bonds, 7/14 at 100.00 Aaa 5,080,617 Series 2004, 5.000%, 7/01/22 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 21,210 Total Oklahoma 22,144,714 ------------------------------------------------------------------------------------------------------------------------------------ OREGON - 0.8% (0.5% OF TOTAL INVESTMENTS) Oregon Department of Administrative Services, Certificates of Participation, Series 2005A: 2,535 5.000%, 5/01/25 - FSA Insured 5/15 at 100.00 AAA 2,623,269 2,115 5.000%, 5/01/30 - FSA Insured 5/15 at 100.00 AAA 2,176,018 3,470 Oregon Department of Administrative Services, Certificates 11/15 at 100.00 AAA 3,642,737 of Participation, Series 2005B, 5.000%, 11/01/18 - FGIC Insured 1,335 Oregon Housing and Community Services Department, Single 7/06 at 101.00 Aa2 1,355,652 Family Mortgage Revenue Bonds, Series 1995A, 6.450%, 7/01/26 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 9,455 Total Oregon 9,797,676 ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA - 1.9% (1.2% OF TOTAL INVESTMENTS) 7,925 Commonwealth Financing Authority, Pennsylvania, State 6/16 at 100.00 AAA 8,259,593 Appropriation Lease Bonds, Series 2006A, 5.000%, 6/01/26 - FSA Insured 35 Nuveen Insured Municipal Opportunity Fund, Inc. (NIO) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA (continued) $ 1,800 Pennsylvania Higher Educational Facilities Authority, Revenue 5/15 at 100.00 AAA $ 1,862,676 Bonds, Drexel University, Series 2005A, 5.000%, 5/01/28 - MBIA Insured 6,335 Radnor Township School District, Delaware County, 8/15 at 100.00 Aaa 6,560,906 Pennsylvania, General Obligation Bonds, Series 2005B, 5.000%, 2/15/30 - FSA Insured Reading School District, Berks County, Pennsylvania, General Obligation Bonds, Series 2005: 3,285 5.000%, 1/15/22 - FSA Insured 1/16 at 100.00 AAA 3,440,545 3,450 5.000%, 1/15/23 - FSA Insured 1/16 at 100.00 AAA 3,605,043 ------------------------------------------------------------------------------------------------------------------------------------ 22,795 Total Pennsylvania 23,728,763 ------------------------------------------------------------------------------------------------------------------------------------ PUERTO RICO - 0.5% (0.3% OF TOTAL INVESTMENTS) 2,500 Puerto Rico Electric Power Authority, Power Revenue Bonds, 7/15 at 100.00 AAA 2,588,200 Series 2005RR, 5.000%, 7/01/30 - XLCA Insured 2,000 Puerto Rico Highway and Transportation Authority, Highway 7/13 at 100.00 AAA 2,140,700 Revenue Bonds, Series 2003G, 5.250%, 7/01/19 - FGIC Insured 1,550 Puerto Rico Municipal Finance Agency, Series 2005C, No Opt. Call AAA 1,696,103 5.250%, 8/01/21 - CIFG Insured ------------------------------------------------------------------------------------------------------------------------------------ 6,050 Total Puerto Rico 6,425,003 ------------------------------------------------------------------------------------------------------------------------------------ RHODE ISLAND - 2.1% (1.3% OF TOTAL INVESTMENTS) 2,195 Providence Housing Development Corporation, Rhode Island, 7/06 at 100.00 AAA 2,201,234 FHA-Insured Section 8 Assisted Mortgage Revenue Refunding Bonds, Barbara Jordan Apartments, Series 1994A, 6.750%, 7/01/25 - MBIA Insured 20,475 Rhode Island Depositors Economic Protection Corporation, 2/11 at 100.00 AAA 21,811,813 Special Obligation Refunding Bonds, Series 1993B, 5.250%, 8/01/21 (Pre-refunded 2/01/11) - MBIA Insured 1,405 Rhode Island Health and Educational Building Corporation, 9/14 at 100.00 Aaa 1,528,190 Higher Education Auxiliary Enterprise Revenue Bonds, Series 2004A, 5.500%, 9/15/24 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 24,075 Total Rhode Island 25,541,237 ------------------------------------------------------------------------------------------------------------------------------------ SOUTH CAROLINA - 4.0% (2.6% OF TOTAL INVESTMENTS) 10,000 Beaufort County, South Carolina, Tax Increment Bonds, 12/12 at 100.00 AAA 10,262,000 New River Redevelopment Project, Series 2002, 5.000%, 6/01/27 - MBIA Insured Medical University Hospital Authority, South Carolina, FHA-Insured Mortgage Revenue Bonds, Series 2004A: 2,000 5.250%, 8/15/22 - MBIA Insured 8/14 at 100.00 AAA 2,116,980 2,105 5.250%, 8/15/23 - MBIA Insured 8/14 at 100.00 AAA 2,225,111 4,855 Piedmont Municipal Power Agency, South Carolina, Electric No Opt. Call AAA 3,548,034 Revenue Bonds, Series 1988A, 0.000%, 1/01/13 - AMBAC Insured (ETM) 9,190 Piedmont Municipal Power Agency, South Carolina, Electric 7/09 at 76.63 AAA 6,235,691 Revenue Bonds, Series 1988A, 0.000%, 1/01/13 (Pre-refunded 7/01/09) - AMBAC Insured 7,955 Piedmont Municipal Power Agency, South Carolina, Electric No Opt. Call AAA 5,723,702 Revenue Bonds, Series 1988A, 0.000%, 1/01/13 - AMBAC Insured 8,000 South Carolina JOBS Economic Development Authority, 11/12 at 100.00 AAA 8,420,240 Industrial Revenue Bonds, South Carolina Electric and Gas Company, Series 2002A, 5.200%, 11/01/27 - AMBAC Insured 10,000 South Carolina JOBS Economic Development Authority, 11/12 at 100.00 AAA 10,476,800 Industrial Revenue Bonds, South Carolina Electric and Gas Company, Series 2002B, 5.450%, 11/01/32 - AMBAC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 54,105 Total South Carolina 49,008,558 ------------------------------------------------------------------------------------------------------------------------------------ TENNESSEE - 0.5% (0.4% OF TOTAL INVESTMENTS) 6,455 Memphis-Shelby County Airport Authority, Tennessee, Airport 3/11 at 100.00 AAA 6,774,135 Revenue Bonds, Series 2001A, 5.500%, 3/01/18 - FSA Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ TEXAS - 16.3% (10.5% OF TOTAL INVESTMENTS) 22,650 Brazos River Authority, Texas, Revenue Refunding Bonds, 5/08 at 102.00 AAA 23,447,507 Houston Industries Inc., Series 1998C, 5.125%, 5/01/19 - AMBAC Insured 36 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ TEXAS (continued) $ 521 Capital Area Housing Finance Corporation, Texas, FNMA 4/12 at 106.00 AAA $ 523,823 Backed Single Family Mortgage Revenue Refunding Bonds, Series 2002A-2, 6.300%, 4/01/35 - AMBAC Insured (Alternative Minimum Tax) 12,500 Dallas-Ft. Worth International Airport, Texas, Joint Revenue 11/09 at 100.00 AAA 13,292,000 Bonds, Series 2000A, 6.125%, 11/01/35 - FGIC Insured (Alternative Minimum Tax) Harris County, Texas, Toll Road Senior Lien Revenue Bonds, Series 1989: 9,000 0.000%, 8/15/18 (Pre-refunded 8/15/09) - AMBAC Insured 8/09 at 53.84 AAA 4,267,890 39,000 0.000%, 8/15/19 (Pre-refunded 8/15/09) - AMBAC Insured 8/09 at 50.26 AAA 17,264,520 7,280 0.000%, 8/15/20 (Pre-refunded 8/15/09) - AMBAC Insured 8/09 at 46.91 AAA 3,008,460 5,085 0.000%, 8/15/21 (Pre-refunded 8/15/09) - AMBAC Insured 8/09 at 43.80 AAA 1,961,640 25,000 Harris County-Houston Sports Authority, Texas, Junior Lien 11/11 at 100.00 AAA 25,878,500 Revenue Refunding Bonds, Series 2001B, 5.250%, 11/15/40 - MBIA Insured 4,671 Houston Housing Finance Corporation, Texas, GNMA 9/11 at 105.00 Aaa 4,887,688 Collateralized Mortgage Multifamily Housing Revenue Bonds, RRG Apartments Project, Series 2001, 6.350%, 3/20/42 Houston, Texas, First Lien Combined Utility System Revenue Bonds, Series 2004A: 4,000 5.250%, 5/15/24 - FGIC Insured 5/14 at 100.00 AAA 4,221,280 5,000 5.250%, 5/15/25 - MBIA Insured 5/14 at 100.00 AAA 5,276,600 6,570 Houston, Texas, General Obligation Public Improvement Bonds, 3/11 at 100.00 AAA 7,031,740 Series 2001A, 5.375%, 3/01/19 (Pre-refunded 3/01/11) - FSA Insured 17,500 Houston, Texas, Hotel Occupancy Tax and Special Revenue 9/11 at 100.00 AAA 18,137,000 Bonds, Convention and Entertainment Project, Series 2001B, 5.250%, 9/01/33 - AMBAC Insured 4,170 Houston, Texas, Subordinate Lien Airport System Revenue Bonds, 7/10 at 100.00 AAA 4,403,145 Series 2000B, 5.500%, 7/01/30 - FSA Insured 23,865 Jefferson County Health Facilities Development Corporation, 8/11 at 100.00 AAA 25,078,058 Texas, FHA-Insured Mortgage Revenue Bonds, Baptist Hospital of Southeast Texas, Series 2001, 5.500%, 8/15/41 - AMBAC Insured 8,205 Lower Colorado River Authority, Texas, Revenue Refunding and 5/11 at 100.00 AAA 8,475,683 Improvement Bonds, Series 2001A, 5.000%, 5/15/21 - MBIA Insured Port of Houston Authority, Harris County, Texas, General Obligation Port Improvement Bonds, Series 2001B: 3,205 5.500%, 10/01/18 - FGIC Insured (Alternative Minimum Tax) 10/11 at 100.00 AAA 3,367,878 3,375 5.500%, 10/01/19 - FGIC Insured (Alternative Minimum Tax) 10/11 at 100.00 AAA 3,546,517 7,205 San Antonio, Texas, Airport System Improvement Revenue 7/11 at 101.00 AAA 7,580,380 Bonds, Series 2001, 5.375%, 7/01/15 - FGIC Insured (Alternative Minimum Tax) Tarrant County Health Facilities Development Corporation, Texas, Revenue Bonds, Texas Health Resources System, Series 1997A: 2,900 5.250%, 2/15/22 - MBIA Insured 2/08 at 102.00 AAA 3,006,749 6,820 5.000%, 2/15/26 - MBIA Insured 2/08 at 101.00 AAA 6,918,822 6,800 Texas Department of Housing and Community Affairs, Single 9/06 at 102.00 AAA 6,943,344 Family Mortgage Revenue Bonds, Series 1996D, 6.250%, 9/01/28 - MBIA Insured (Alternative Minimum Tax) 1,840 Ysleta Independent School District Public Facility Corporation, 11/09 at 100.00 AAA 1,917,298 Texas, Lease Revenue Refunding Bonds, Series 2001, 5.375%, 11/15/24 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 227,162 Total Texas 200,436,522 ------------------------------------------------------------------------------------------------------------------------------------ UTAH - 0.3% (0.2% OF TOTAL INVESTMENTS) 2,000 Clearfield City, Utah, Sales Tax Revenue Bonds, Series 2003, 7/13 at 100.00 AAA 2,055,060 5.000%, 7/01/28 - FGIC Insured 1,810 Utah Housing Finance Agency, FHA-Insured Section 8 Assisted 7/06 at 100.00 AA 1,812,806 Multifamily Housing Revenue Bonds, Series 1992A, 7.400%, 7/01/24 ------------------------------------------------------------------------------------------------------------------------------------ 3,810 Total Utah 3,867,866 ------------------------------------------------------------------------------------------------------------------------------------ VIRGINIA - 2.4% (1.5% OF TOTAL INVESTMENTS) 8,000 Greater Richmond Convention Center Authority, Virginia, Hotel 6/15 at 100.00 AAA 8,251,040 Tax Revenue Bonds, Series 2005, 5.000%, 6/15/30 - MBIA Insured 1,035 Loudoun County Industrial Development Authority, Virginia, 6/14 at 100.00 AAA 1,103,641 Lease Revenue Bonds, Public Safety Facilities, Series 2003A, 5.250%, 12/15/20 - FSA Insured 37 Nuveen Insured Municipal Opportunity Fund, Inc. (NIO) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ VIRGINIA (continued) $ 4,840 Metropolitan Washington D.C. Airports Authority, Airport System 10/11 at 101.00 AAA $ 5,114,186 Revenue Bonds, Series 2001A, 5.500%, 10/01/19 - MBIA Insured (Alternative Minimum Tax) 4,265 Metropolitan Washington D.C. Airports Authority, Airport System 10/14 at 100.00 AAA 4,461,744 Revenue Bonds, Series 2004A, 5.000%, 10/01/20 - MBIA Insured 10,000 Virginia Housing Development Authority, Commonwealth 7/11 at 100.00 AAA 10,441,500 Mortgage Bonds, Series 2001H-1, 5.375%, 7/01/36 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 28,140 Total Virginia 29,372,111 ------------------------------------------------------------------------------------------------------------------------------------ WASHINGTON - 1.2% (0.8% OF TOTAL INVESTMENTS) 2,500 Grant County Public Utility District 2, Washington, Revenue 1/15 at 100.00 AAA 2,571,600 Bonds, Wanapum Hydroelectric Development, Series 2005A, 5.000%, 1/01/29 - FGIC Insured 3,500 King County School District 401, Highline, Washington, General 12/14 at 100.00 AAA 3,622,150 Obligation Bonds, Series 2004, 5.000%, 10/01/24 - FGIC Insured 3,195 Kitsap County, Washington, Limited Tax General Obligation 7/10 at 100.00 AAA 3,409,672 Bonds, Series 2000, 5.500%, 7/01/25 (Pre-refunded 7/01/10) - AMBAC Insured 4,250 Snohomish County Public Utility District 1, Washington, 7/06 at 100.00 AAA 4,933,230 Generation System Revenue Bonds, Series 1989, 6.650%, 1/01/16 - FGIC Insured (ETM) ------------------------------------------------------------------------------------------------------------------------------------ 13,445 Total Washington 14,536,652 ------------------------------------------------------------------------------------------------------------------------------------ WEST VIRGINIA - 0.8% (0.5% OF TOTAL INVESTMENTS) 10,000 Harrison County Commission, West Virginia, Solid Waste 5/06 at 100.00 AAA 10,002,300 Disposal Revenue Bonds, West Penn Power Company - Harrison Station, Series 1993B, 6.300%, 5/01/23 - MBIA Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ WISCONSIN - 4.1% (2.7% OF TOTAL INVESTMENTS) 18,000 Wisconsin Health and Educational Facilities Authority, Revenue 8/07 at 102.00 AAA 18,554,400 Bonds, Aurora Healthcare Inc., Series 1997, 5.250%, 8/15/17 - MBIA Insured 15,000 Wisconsin Health and Educational Facilities Authority, Revenue 2/07 at 102.00 AAA 15,502,500 Bonds, Marshfield Clinic, Series 1997, 5.750%, 2/15/27 - MBIA Insured 680 Wisconsin Housing and Economic Development Authority, 7/06 at 100.00 AAA 680,993 Housing Revenue Bonds, Series 1992A, 6.850%, 11/01/12 - MBIA Insured 1,675 Wisconsin Public Power Incorporated System, Power Supply 7/15 at 100.00 AAA 1,727,746 System Revenue Bonds, Series 2005A, 5.000%, 7/01/30 - AMBAC Insured 2,890 Wisconsin, General Obligation Bonds, Series 2004-3, 5/14 at 100.00 AAA 3,076,347 5.250%, 5/01/20 - FGIC Insured 10,945 Wisconsin, General Obligation Bonds, Series 2004-4, 5/14 at 100.00 AAA 11,402,939 5.000%, 5/01/20 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 49,190 Total Wisconsin 50,944,925 ------------------------------------------------------------------------------------------------------------------------------------ $ 1,962,632 Total Investments (cost $1,813,064,169) - 154.7% 1,905,831,610 =============----------------------------------------------------------------------------------------------------------------------- Other Assets Less Liabilities - 0.5% 6,069,267 -------------------------------------------------------------------------------------------------------------------- Preferred Shares, at Liquidation Value - (55.2)% (680,000,000) -------------------------------------------------------------------------------------------------------------------- Net Assets Applicable to Common Shares - 100% $1,231,900,877 ==================================================================================================================== All of the bonds in the Portfolio of Investments are either covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance, or are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, any of which ensure the timely payment of principal and interest. (1) All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted. (2) Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns. (3) Ratings: Using the higher of Standard & Poor's or Moody's rating. Ratings below BBB by Standard & Poor's Group or Baa by Moody's Investor Service, Inc. are considered to be below investment grade. WI/DD Purchased on a when-issued or delayed delivery basis. (ETM) Escrowed to maturity. See accompanying notes to financial statements. 38 Nuveen Premier Insured Municipal Income Fund, Inc. (NIF) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ALABAMA - 1.2% (0.8% OF TOTAL INVESTMENTS) $ 3,200 Auburn, Alabama, General Obligation Warrants, Series 2005, 8/15 at 100.00 AAA $ 3,308,800 5.000%, 8/01/30 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ ARIZONA - 1.5% (1.0% OF TOTAL INVESTMENTS) 4,370 Phoenix Civic Improvement Corporation, Arizona, Junior Lien 7/15 at 100.00 AAA 4,439,614 Water System Revenue Bonds, Series 2005, 4.750%, 7/01/25 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ ARKANSAS - 1.4% (0.9% OF TOTAL INVESTMENTS) 4,020 Northwest Community College District, Arkansas, General 5/15 at 100.00 AAA 4,193,744 Obligation Bonds, Series 2005, 5.000%, 5/15/23 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA - 30.4% (19.9% OF TOTAL INVESTMENTS) ABAG Finance Authority for Non-Profit Corporations, California, Insured Certificates of Participation, Children's Hospital Medical Center of Northern California, Series 1999: 6,750 5.875%, 12/01/19 - AMBAC Insured 12/09 at 101.00 AAA 7,259,963 6.000%, 12/01/29 - AMBAC Insured 12/09 at 101.00 AAA 10,798,100 1,000 California Department of Water Resources, Water System 12/14 at 100.00 AAA 1,037,790 Revenue Bonds, Central Valley Project, Series 2005AC, 5.000%, 12/01/26 - MBIA Insured 1,250 California Pollution Control Financing Authority, Remarketed 4/11 at 102.00 AAA 1,319,800 Revenue Bonds, Pacific Gas and Electric Company, Series 1996A, 5.350%, 12/01/16 - MBIA Insured (Alternative Minimum Tax) 1,005 Folsom Cordova Unified School District, Sacramento County, 10/14 at 100.00 AAA 1,043,090 California, General Obligation Bonds, School Facilities Improvement District 2, Series 2004B, 5.000%, 10/01/26 - FSA Insured 85 Kern County Housing Authority, California, GNMA Guaranteed No Opt. Call AAA 85,422 Tax-Exempt Mortgage Obligation Bonds, Series 1994A-I, 7.150%, 12/30/24 (Alternative Minimum Tax) 55 Kern County Housing Authority, California, GNMA Guaranteed No Opt. Call AAA 55,287 Tax-Exempt Mortgage Obligation Bonds, Series 1994A-III, 7.450%, 6/30/25 (Alternative Minimum Tax) 4,865 La Verne-Grand Terrace Housing Finance Agency, California, No Opt. Call AAA 6,518,808 Single Family Residential Mortgage Revenue Bonds, Series 1984A, 10.250%, 7/01/17 (ETM) 1,690 Los Angeles Community College District, Los Angeles County, 8/15 at 100.00 AAA 1,763,042 California, General Obligation Bonds, Series 2005A, 5.000%, 8/01/24 - FSA Insured 3,600 Los Angeles Unified School District, California, General 7/16 at 100.00 AAA 3,761,892 Obligation Bonds, Series 2006F, 5.000%, 7/01/25 - FGIC Insured 5,000 Ontario Redevelopment Financing Authority, San Bernardino No Opt. Call AAA 6,650,300 County, California, Revenue Refunding Bonds, Redevelopment Project 1, Series 1995, 7.400%, 8/01/25 - MBIA Insured 8,880 Pomona, California, GNMA/FHLMC Collateralized Single No Opt. Call AAA 11,537,606 Family Mortgage Revenue Refunding Bonds, Series 1990B, 7.500%, 8/01/23 (ETM) 13,215 San Bernardino County, California, GNMA Mortgage-Backed No Opt. Call AAA 15,594,490 Securities Program Single Family Home Mortgage Revenue Bonds, Series 1988A, 8.300%, 9/01/14 (Alternative Minimum Tax) (ETM) 10,155 San Bernardino, California, GNMA Mortgage-Backed Securities No Opt. Call AAA 12,786,668 Program Single Family Mortgage Revenue Refunding Bonds, Series 1990A, 7.500%, 5/01/23 (ETM) 4,300 San Francisco Airports Commission, California, Revenue 5/11 at 100.00 AAA 4,438,933 Refunding Bonds, San Francisco International Airport, Second Series 2001, Issue 27A, 5.125%, 5/01/19 - MBIA Insured (Alternative Minimum Tax) 2,000 San Jose Redevelopment Agency, California, Tax Allocation 8/14 at 100.00 AAA 2,134,340 Bonds, Merged Area Redevelopment Project, Series 2004A, 5.250%, 8/01/19 - MBIA Insured 1,815 University of California, General Revenue Bonds, Series 2005G, 5/13 at 101.00 AAA 1,825,218 4.750%, 5/15/31 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 75,665 Total California 88,610,749 ------------------------------------------------------------------------------------------------------------------------------------ 39 Nuveen Premier Insured Municipal Income Fund, Inc. (NIF) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ COLORADO - 7.2% (4.7% OF TOTAL INVESTMENTS) $ 1,500 Adams and Arapahoe Counties Joint School District 28J, 12/13 at 100.00 AAA $ 1,578,585 Aurora, Colorado, General Obligation Bonds, Series 2003A, 5.125%, 12/01/21 - FSA Insured 2,500 Denver City and County, Colorado, Airport System Revenue 11/12 at 100.00 AAA 2,649,800 Refunding Bonds, Series 2002E, 5.500%, 11/15/18 - FGIC Insured (Alternative Minimum Tax) 6,000 E-470 Public Highway Authority, Colorado, Senior Revenue 9/10 at 102.00 AAA 6,535,260 Bonds, Series 2000A, 5.750%, 9/01/29 - MBIA Insured 4,405 Garfield, Eagle and Pitkin Counties School District RE-1, 12/14 at 100.00 AAA 4,584,856 Roaring Fork, Colorado, General Obligation Bonds, Series 2005A, 5.000%, 12/15/24 - FSA Insured 2,065 Jefferson County School District R1, Colorado, General 12/14 at 100.00 AAA 2,149,314 Obligation Bonds, Series 2004, 5.000%, 12/15/24 - FSA Insured 1,390 Teller County School District RE-2, Woodland Park, Colorado, 12/14 at 100.00 AAA 1,450,590 General Obligation Bonds, Series 2004, 5.000%, 12/01/22 - MBIA Insured 1,000 University of Colorado, Enterprise System Revenue Bonds, 6/12 at 100.00 AAA 1,039,350 Series 2002A, 5.000%, 6/01/19 - FGIC Insured 1,000 University of Colorado, Enterprise System Revenue Bonds, 6/15 at 100.00 AAA 1,035,800 Series 2005, 5.000%, 6/01/30 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 19,860 Total Colorado 21,023,555 ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA - 5.6% (3.7% OF TOTAL INVESTMENTS) 2,285 Florida Municipal Loan Council, Revenue Bonds, Series 2005A, 2/15 at 100.00 AAA 2,376,012 5.000%, 2/01/23 - MBIA Insured 1,500 JEA, Florida, Water and Sewerage System Revenue Bonds, 10/13 at 100.00 AAA 1,564,635 Series 2004A, 5.000%, 10/01/19 - FGIC Insured 4,145 Miami, Florida, General Obligation Bonds, Series 2002, 1/12 at 100.00 AAA 4,299,857 5.000%, 1/01/22 - MBIA Insured 4,240 Reedy Creek Improvement District, Florida, Utility Revenue 10/13 at 100.00 AAA 4,531,076 Bonds, Series 2003-1, 5.250%, 10/01/17 - MBIA Insured 2,000 Tallahassee, Florida, Energy System Revenue Bonds, 10/15 at 100.00 AAA 2,069,060 Series 2005, 5.000%, 10/01/28 - MBIA Insured 1,415 Taylor County, Florida, Sales Tax Revenue Bonds, Series 2005, 10/15 at 100.00 AAA 1,469,364 5.000%, 10/01/25 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 15,585 Total Florida 16,310,004 ------------------------------------------------------------------------------------------------------------------------------------ GEORGIA - 3.4% (2.2% OF TOTAL INVESTMENTS) 2,950 Atlanta, Georgia, Airport General Revenue Bonds, Series 2004G, 1/15 at 100.00 AAA 3,051,569 5.000%, 1/01/25 - FSA Insured 6,500 Medical Center Hospital Authority, Georgia, Revenue 8/09 at 102.00 AAA 6,908,915 Anticipation Certificates, Columbus Regional Healthcare System, Inc. Project, Series 1999, 5.500%, 8/01/25 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 9,450 Total Georgia 9,960,484 ------------------------------------------------------------------------------------------------------------------------------------ HAWAII - 3.8% (2.5% OF TOTAL INVESTMENTS) 2,250 Hawaii Department of Budget and Finance, Special Purpose 1/09 at 101.00 AAA 2,386,642 Revenue Bonds, Hawaiian Electric Company Inc., Series 1999D, 6.150%, 1/01/20 - AMBAC Insured (Alternative Minimum Tax) 8,030 Hawaii Department of Transportation, Airport System Revenue 7/10 at 101.00 AAA 8,807,143 Refunding Bonds, Series 2000B, 6.500%, 7/01/15 - FGIC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 10,280 Total Hawaii 11,193,785 ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS - 15.7% (10.3% OF TOTAL INVESTMENTS) 4,000 Bridgeview, Illinois, General Obligation Bonds, Series 2002, 12/12 at 100.00 AAA 4,146,280 5.000%, 12/01/22 - FGIC Insured 8,200 Chicago Board of Education, Illinois, General Obligation Lease No Opt. Call AAA 9,188,756 Certificates, Series 1992A, 6.250%, 1/01/15 - MBIA Insured 10,000 Chicago, Illinois, General Obligation Refunding Bonds, 1/10 at 101.00 AAA 10,586,700 Series 2000D, 5.500%, 1/01/35 - FGIC Insured 1,450 Chicago, Illinois, Third Lien General Airport Revenue Bonds, 1/16 at 100.00 AAA 1,542,061 O'Hare International Airport, Series 2005A, 5.250%, 1/01/24 - MBIA Insured 23,110 Illinois Development Finance Authority, Local Government No Opt. Call Aaa 14,236,684 Program Revenue Bonds, Kane, Cook and DuPage Counties School District U46 - Elgin, Series 2002, 0.000%, 1/01/17 - FSA Insured 40 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS (continued) $ 5,010 Metropolitan Pier and Exposition Authority, Illinois, Revenue No Opt. Call AAA $ 2,372,435 Refunding Bonds, McCormick Place Expansion Project, Series 1996A, 0.000%, 12/15/21 - MBIA Insured 3,225 Regional Transportation Authority, Cook, DuPage, Kane, No Opt. Call AAA 3,706,396 Lake, McHenry and Will Counties, Illinois, General Obligation Bonds, Series 1992A, 9.000%, 6/01/09 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 54,995 Total Illinois 45,779,312 ------------------------------------------------------------------------------------------------------------------------------------ INDIANA - 2.8% (1.8% OF TOTAL INVESTMENTS) Indiana University, Parking Facility Revenue Bonds, Series 2004: 1,015 5.250%, 11/15/19 - AMBAC Insured 11/14 at 100.00 AAA 1,082,964 1,060 5.250%, 11/15/20 - AMBAC Insured 11/14 at 100.00 AAA 1,130,193 1,100 5.250%, 11/15/21 - AMBAC Insured 11/14 at 100.00 AAA 1,172,842 9,255 Indianapolis Local Public Improvement Bond Bank, Indiana, No Opt. Call AAA 3,691,727 Series 1999E, 0.000%, 2/01/25 - AMBAC Insured 1,000 Metropolitan School District Steuben County K-5 Building 7/14 at 102.00 AAA 1,067,140 Corporation, Indiana, First Mortgage Bonds, Series 2003, 5.250%, 1/15/21 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 13,430 Total Indiana 8,144,866 ------------------------------------------------------------------------------------------------------------------------------------ IOWA - 1.2% (0.8% OF TOTAL INVESTMENTS) 3,345 Ames, Iowa, Hospital Revenue Refunding Bonds, Mary Greeley 6/13 at 100.00 Aaa 3,469,635 Medical Center, Series 2003, 5.000%, 6/15/17 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ KANSAS - 1.4% (0.9% OF TOTAL INVESTMENTS) 1,245 Kansas Development Finance Authority, Board of Regents, 4/15 at 100.00 AAA 1,297,265 Revenue Bonds, Kansas State University Housing System, Series 2005A, 5.000%, 4/01/23 - MBIA Insured 2,760 Neosho County Unified School District 413, Kansas, General 9/14 at 100.00 Aaa 2,848,154 Obligation Bonds, Series 2006, 5.000%, 9/01/31 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 4,005 Total Kansas 4,145,419 ------------------------------------------------------------------------------------------------------------------------------------ MARYLAND - 2.2% (1.4% OF TOTAL INVESTMENTS) 1,200 Maryland Economic Development Corporation, Student Housing 6/16 at 100.00 AAA 1,240,800 Revenue Bonds, University of Maryland College Park Projects Refunding, Series 2006, 5.000%, 6/01/28 - CIFG Insured 5,000 Maryland Transportation Authority, Airport Parking Revenue 3/12 at 101.00 AAA 5,168,850 Bonds, Baltimore-Washington International Airport Passenger Facility, Series 2002B, 5.125%, 3/01/21 - AMBAC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 6,200 Total Maryland 6,409,650 ------------------------------------------------------------------------------------------------------------------------------------ MASSACHUSETTS - 1.6% (1.0% OF TOTAL INVESTMENTS) 4,400 Massachusetts School Building Authority, Dedicated Sales 8/15 at 100.00 AAA 4,590,828 Tax Revenue Bonds, Series 2005A, 5.000%, 8/15/23 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ MICHIGAN - 3.7% (2.4% OF TOTAL INVESTMENTS) 6,500 Michigan Higher Education Student Loan Authority, Revenue No Opt. Call AAA 6,760,585 Bonds, Series 2000 XII-T, 5.300%, 9/01/10 - AMBAC Insured (Alternative Minimum Tax) 3,810 Michigan Housing Development Authority, GNMA Collateralized 8/12 at 102.00 Aaa 3,926,205 Limited Obligation Multifamily Housing Revenue Bonds, Cranbrook Apartments, Series 2001A, 5.500%, 2/20/43 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 10,310 Total Michigan 10,686,790 ------------------------------------------------------------------------------------------------------------------------------------ MINNESOTA - 1.8% (1.2% OF TOTAL INVESTMENTS) 4,860 Minneapolis-St. Paul Metropolitan Airports Commission, 1/11 at 100.00 AAA 5,164,771 Minnesota, Airport Revenue Bonds, Series 2001B, 5.750%, 1/01/15 - FGIC Insured (Alternative Minimum Tax) 150 Minnesota Housing Finance Agency, Rental Housing Bonds, 8/06 at 101.00 AAA 151,205 Series 1995D, 5.950%, 2/01/18 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 5,010 Total Minnesota 5,315,976 ------------------------------------------------------------------------------------------------------------------------------------ 41 Nuveen Premier Insured Municipal Income Fund, Inc. (NIF) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ MISSOURI - 3.5% (2.3% OF TOTAL INVESTMENTS) $ 7,495 Jefferson County Industrial Development Authority, Missouri, 8/07 at 100.00 AAA $ 8,163,854 Housing Revenue Bonds, Richardson Road Apartments Project, Series 1985, 11.000%, 12/15/15 (Pre-refunded 8/15/07) 2,000 Missouri Western State College, Auxiliary System Revenue 10/13 at 100.00 AAA 2,080,380 Bonds, Series 2003, 5.000%, 10/01/21 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 9,495 Total Missouri 10,244,234 ------------------------------------------------------------------------------------------------------------------------------------ NEVADA - 8.7% (5.7% OF TOTAL INVESTMENTS) 3,000 Clark County, Nevada, General Obligation Bank Bonds, 12/12 at 100.00 AAA 3,066,600 Southern Nevada Water Authority Loan, Series 2002, 5.000%, 6/01/32 - MBIA Insured 8,000 Clark County, Nevada, Subordinate Lien Airport Revenue Bonds, 7/11 at 100.00 AAA 8,495,280 Series 2001B, 5.125%, 7/01/21 (Pre-refunded 7/01/11) - FGIC Insured 7,990 Reno, Nevada, Senior Lien Sales and Room Tax Revenue Bonds, 6/12 at 100.00 AAA 8,577,585 Reno Transportation Rail Access Corridor Project, Series 2002, 5.250%, 6/01/41 (Pre-refunded 6/01/12) - AMBAC Insured 5,050 Washoe County, Nevada, Gas and Water Facilities Remarketed 7/06 at 100.00 AAA 5,171,352 Revenue Refunding Bonds, Sierra Pacific Power Company, Series 1987, 6.300%, 12/01/14 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 24,040 Total Nevada 25,310,817 ------------------------------------------------------------------------------------------------------------------------------------ NEW JERSEY - 1.2% (0.8% OF TOTAL INVESTMENTS) New Jersey Economic Development Authority, Revenue Bonds, Motor Vehicle Surcharge, Series 2004A: 1,200 5.000%, 7/01/22 - MBIA Insured 7/14 at 100.00 AAA 1,245,996 1,200 5.000%, 7/01/23 - MBIA Insured 7/14 at 100.00 AAA 1,244,328 800 Rutgers State University, New Jersey, Certificates of 1/14 at 100.00 AAA 825,408 Participation, Lower Georges Street University Redevelopment Associates LLC, Series 2004, 5.000%, 1/01/24 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 3,200 Total New Jersey 3,315,732 ------------------------------------------------------------------------------------------------------------------------------------ NEW YORK - 9.2% (6.0% OF TOTAL INVESTMENTS) 1,000 Dormitory Authority of the State of New York, FHA-Insured 2/15 at 100.00 AAA 1,039,100 Mortgage Revenue Bonds, Montefiore Hospital, Series 2004, 5.000%, 8/01/23 - FGIC Insured 1,510 Dormitory Authority of the State of New York, Revenue Bonds, 2/15 at 100.00 AAA 1,569,252 Mental Health Services Facilities Improvements, Series 2005B, 5.000%, 2/15/24 - AMBAC Insured 5,000 Long Island Power Authority, New York, Electric System General 6/16 at 100.00 AAA 5,211,100 Revenue Bonds, Series 2006A, 5.000%, 12/01/25 - FGIC Insured 10,000 Metropolitan Transportation Authority, New York, Transportation 11/12 at 100.00 AAA 10,580,100 Revenue Refunding Bonds, Series 2002F, 5.250%, 11/15/27 - MBIA Insured 1,000 New York City Municipal Water Finance Authority, New York, 6/15 at 100.00 AAA 1,041,230 Water and Sewerage System Revenue Bonds, Fiscal Series 2005C, 5.000%, 6/15/25 - MBIA Insured 5,700 New York State Thruway Authority, General Revenue Bonds, 7/15 at 100.00 AAA 5,931,534 Series 2005G, 5.000%, 1/01/26 - FSA Insured 1,450 New York State Thruway Authority, Highway and Bridge 10/15 at 100.00 AAA 1,520,470 Trust Fund Bonds, Second Generation, Series 2005B, 5.000%, 4/01/21 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 25,660 Total New York 26,892,786 ------------------------------------------------------------------------------------------------------------------------------------ NORTH CAROLINA - 2.2% (1.4% OF TOTAL INVESTMENTS) 3,100 North Carolina Medical Care Commission, FHA-Insured 10/13 at 100.00 AAA 3,205,214 Mortgage Revenue Bonds, Betsy Johnson Regional Hospital Project, Series 2003, 5.125%, 10/01/32 - FSA Insured 3,050 Raleigh Durham Airport Authority, North Carolina, Airport 5/15 at 100.00 Aaa 3,179,107 Revenue Bonds, Series 2005A, 5.000%, 5/01/22 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 6,150 Total North Carolina 6,384,321 ------------------------------------------------------------------------------------------------------------------------------------ OHIO - 0.6% (0.4% OF TOTAL INVESTMENTS) 1,500 Tallmadge City School District, Ohio, General Obligation Bonds, 6/15 at 100.00 AAA 1,551,435 Series 2005, 5.000%, 12/01/28 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 42 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ OKLAHOMA - 1.6% (1.1% OF TOTAL INVESTMENTS) $ 3,500 Oklahoma Capitol Improvement Authority, State Facilities 7/15 at 100.00 AAA $ 3,647,525 Revenue Bonds, Series 2005F, 5.000%, 7/01/24 - AMBAC Insured 1,075 Oklahoma Housing Finance Agency, GNMA Collateralized Single No Opt. Call AAA 1,134,856 Family Mortgage Revenue Bonds, Series 1987A, 7.997%, 8/01/18 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 4,575 Total Oklahoma 4,782,381 ------------------------------------------------------------------------------------------------------------------------------------ OREGON - 4.4% (2.8% OF TOTAL INVESTMENTS) Oregon Health Sciences University, Revenue Bonds, Series 2002A: 5,000 5.000%, 7/01/26 - MBIA Insured 1/13 at 100.00 AAA 5,158,450 7,000 5.000%, 7/01/32 - MBIA Insured 1/13 at 100.00 AAA 7,189,280 345 Oregon Health, Housing, Educational and Cultural Facilities 3/12 at 105.00 Aaa 355,740 Authority, GNMA Mortgage-Backed Securities Program Assisted Living Project Revenue Bonds, Necanicum Village LLC, Series 2001A, 6.850%, 6/20/42 ------------------------------------------------------------------------------------------------------------------------------------ 12,345 Total Oregon 12,703,470 ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA - 2.0% (1.3% OF TOTAL INVESTMENTS) 1,500 Allegheny County Sanitary Authority, Pennsylvania, Sewerage 12/15 at 100.00 AAA 1,561,995 Revenue Bonds, Series 2005A, 5.000%, 12/01/23 - MBIA Insured 4,000 Commonwealth Financing Authority, Pennsylvania, State 6/16 at 100.00 AAA 4,168,880 Appropriation Lease Bonds, Series 2006A, 5.000%, 6/01/26 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 5,500 Total Pennsylvania 5,730,875 ------------------------------------------------------------------------------------------------------------------------------------ PUERTO RICO - 2.0% (1.3% OF TOTAL INVESTMENTS) 2,500 Puerto Rico Electric Power Authority, Power Revenue Bonds, 7/15 at 100.00 AAA 2,628,475 Series 2005RR, 5.000%, 7/01/22 - FGIC Insured 1,000 Puerto Rico Municipal Finance Agency, Series 2005C, No Opt. Call AAA 1,094,260 5.250%, 8/01/21 - CIFG Insured 2,000 Puerto Rico, Highway Revenue Bonds, Highway and No Opt. Call AAA 2,216,680 Transportation Authority, Series 2003AA, 5.500%, 7/01/17 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 5,500 Total Puerto Rico 5,939,415 ------------------------------------------------------------------------------------------------------------------------------------ TENNESSEE - 3.7% (2.4% OF TOTAL INVESTMENTS) 3,000 Blount County Public Building Authority, Tennessee, Local 6/15 at 100.00 Aaa 3,130,140 Government Public Improvement Lease Bonds, Oak Ridge, Series 2005B-9-A, 5.000%, 6/01/24 - AMBAC Insured 2,055 Memphis, Tennessee, Sanitary Sewerage System Revenue 10/14 at 100.00 AAA 2,144,619 Bonds, Series 2004, 5.000%, 10/01/22 - FSA Insured 5,000 Metropolitan Government of Nashville-Davidson County Health 11/09 at 101.00 AAA 5,407,200 and Educational Facilities Board, Tennessee, Revenue Bonds, Ascension Health Credit Group, Series 1999A, 6.000%, 11/15/30 (Pre-refunded 11/15/09) - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 10,055 Total Tennessee 10,681,959 ------------------------------------------------------------------------------------------------------------------------------------ TEXAS - 10.6% (6.9% OF TOTAL INVESTMENTS) 12,500 Dallas-Ft. Worth International Airport, Texas, Joint Revenue 11/09 at 100.00 AAA 13,014,625 Refunding and Improvement Bonds, Series 2001A, 5.500%, 11/01/35 - FGIC Insured (Alternative Minimum Tax) North Harris County Regional Water Authority, Texas, Senior Water Revenue Bonds, Series 2003: 4,565 5.250%, 12/15/20 - FGIC Insured 12/13 at 100.00 AAA 4,824,566 4,800 5.250%, 12/15/21 - FGIC Insured 12/13 at 100.00 AAA 5,085,072 7,600 San Antonio, Texas, Airport System Improvement Revenue 7/11 at 101.00 AAA 7,969,132 Bonds, Series 2001, 5.375%, 7/01/16 - FGIC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 29,465 Total Texas 30,893,395 ------------------------------------------------------------------------------------------------------------------------------------ WASHINGTON - 18.6% (12.1% OF TOTAL INVESTMENTS) 5,000 Chelan County Public Utility District 1, Washington, Hydro 7/11 at 101.00 AAA 5,307,900 Consolidated System Revenue Bonds, Series 2001B, 5.600%, 1/01/36 - MBIA Insured (Alternative Minimum Tax) 43 Nuveen Premier Insured Municipal Income Fund, Inc. (NIF) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ WASHINGTON (continued) King County School District 405, Bellevue, Washington, General Obligation Bonds, Series 2002: $ 12,060 5.000%, 12/01/19 - FGIC Insured 12/12 at 100.00 AAA $ 12,536,129 12,785 5.000%, 12/01/20 - FGIC Insured 12/12 at 100.00 AAA 13,259,963 Pierce County School District 343, Dieringer, Washington, General Obligation Refunding Bonds, Series 2003: 2,755 5.250%, 12/01/18 - FGIC Insured 6/13 at 100.00 Aaa 2,926,389 2,990 5.250%, 12/01/19 - FGIC Insured 6/13 at 100.00 Aaa 3,173,736 4,715 Port of Seattle, Washington, Revenue Bonds, Series 2001B, 10/11 at 100.00 AAA 5,001,389 5.625%, 4/01/17 - FGIC Insured (Alternative Minimum Tax) 895 Port of Seattle, Washington, Special Facility Revenue Bonds, 3/10 at 101.00 AAA 957,203 Terminal 18, Series 1999C, 6.000%, 9/01/29 - MBIA Insured (Alternative Minimum Tax) 1,265 Tacoma, Washington, General Obligation Bonds, Series 2002, 12/12 at 100.00 AAA 1,320,913 5.000%, 12/01/18 - FGIC Insured 4,200 Tacoma, Washington, Solid Waste Utility Revenue Refunding 12/11 at 100.00 AAA 4,410,756 Bonds, Series 2001, 5.250%, 12/01/20 - AMBAC Insured 5,000 Washington, General Obligation Bonds, Series 2001C, 1/11 at 100.00 AAA 5,229,100 5.250%, 1/01/26 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 51,665 Total Washington 54,123,478 ------------------------------------------------------------------------------------------------------------------------------------ $ 433,275 Total Investments (cost $425,112,914) - 153.2% 446,137,509 =============----------------------------------------------------------------------------------------------------------------------- Other Assets Less Liabilities - 2.1% 6,112,739 -------------------------------------------------------------------------------------------------------------------- Preferred Shares, at Liquidation Value - (55.3)% (161,000,000) -------------------------------------------------------------------------------------------------------------------- Net Assets Applicable to Common Shares - 100% $ 291,250,248 ==================================================================================================================== All of the bonds in the Portfolio of Investments are either covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance, or are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, any of which ensure the timely payment of principal and interest. (1) All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted. (2) Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns. (3) Ratings: Using the higher of Standard & Poor's or Moody's rating. Ratings below BBB by Standard & Poor's Group or Baa by Moody's Investor Service, Inc. are considered to be below investment grade. (ETM) Escrowed to maturity. See accompanying notes to financial statements. 44 Nuveen Insured Premium Income Municipal Fund 2 (NPX) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ALABAMA - 2.2% (1.5% OF TOTAL INVESTMENTS) $ 3,750 Huntsville Healthcare Authority, Alabama, Revenue Bonds, 6/15 at 100.00 AAA $ 3,854,662 Series 2005A, 5.000%, 6/01/24 - MBIA Insured Jefferson County, Alabama, General Obligation Warrants, Series 2004A: 1,395 5.000%, 4/01/22 - MBIA Insured 4/14 at 100.00 AAA 1,450,926 1,040 5.000%, 4/01/23 - MBIA Insured 4/14 at 100.00 AAA 1,079,572 Montgomery Water and Sewerage Board, Alabama, Water and Sewerage Revenue Bonds, Series 2005: 2,220 5.000%, 3/01/24 - FSA Insured 3/15 at 100.00 AAA 2,310,798 2,590 5.000%, 3/01/25 - FSA Insured 3/15 at 100.00 AAA 2,692,072 ------------------------------------------------------------------------------------------------------------------------------------ 10,995 Total Alabama 11,388,030 ------------------------------------------------------------------------------------------------------------------------------------ ARIZONA - 2.4% (1.6% OF TOTAL INVESTMENTS) 12,365 Phoenix Civic Improvement Corporation, Arizona, Junior Lien 7/15 at 100.00 AAA 12,497,182 Water System Revenue Bonds, Series 2005, 4.750%, 7/01/27 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ ARKANSAS - 2.9% (1.9% OF TOTAL INVESTMENTS) 7,745 Arkansas Development Finance Authority, State Facility Revenue 6/14 at 100.00 AAA 8,202,342 Bonds, Donaghey Plaza Project, Series 2004, 5.250%, 6/01/25 - FSA Insured University of Arkansas, Fayetteville, Revenue Bonds, Medical Sciences Campus, Series 2004B: 2,000 5.000%, 11/01/27 - MBIA Insured 11/14 at 100.00 Aaa 2,067,900 2,000 5.000%, 11/01/28 - MBIA Insured 11/14 at 100.00 Aaa 2,066,460 2,480 University of Arkansas, Monticello Campus, Revenue Bonds, 12/13 at 100.00 Aaa 2,546,861 Series 2005, 5.000%, 12/01/35 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 14,225 Total Arkansas 14,883,563 ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA - 21.9% (14.5% OF TOTAL INVESTMENTS) California Department of Water Resources, Water System Revenue Bonds, Central Valley Project, Series 2005AC: 2,000 5.000%, 12/01/24 - MBIA Insured 12/14 at 100.00 AAA 2,079,920 2,215 5.000%, 12/01/25 - MBIA Insured 12/14 at 100.00 AAA 2,300,300 1,800 California Educational Facilities Authority, Revenue Bonds, 10/15 at 100.00 Aaa 1,859,364 Occidental College, Series 2005A, 5.000%, 10/01/33 - MBIA Insured 31,200 Foothill/Eastern Transportation Corridor Agency, California, 1/10 at 24.23 AAA 6,393,504 Toll Road Revenue Refunding Bonds, Series 1999, 0.000%, 1/15/34 - MBIA Insured 1,735 Fullerton Public Financing Authority, California, Tax Allocation 9/15 at 100.00 AAA 1,791,769 Revenue Bonds, Series 2005, 5.000%, 9/01/27 - AMBAC Insured 7,000 Golden State Tobacco Securitization Corporation, California, 6/15 at 100.00 AAA 7,161,420 Tobacco Settlement Asset-Backed Revenue Bonds, Series 2005A, 5.000%, 6/01/35 - FGIC Insured 6,520 Los Angeles Unified School District, California, General 7/15 at 100.00 AAA 6,819,855 Obligation Bonds, Series 2005E, 5.000%, 7/01/22 - AMBAC Insured 4,000 Los Angeles Unified School District, California, General 7/16 at 100.00 AAA 4,186,560 Obligation Bonds, Series 2006F, 5.000%, 7/01/24 - FGIC Insured 15,000 Orange County Sanitation District, California, Certificates 8/13 at 100.00 AAA 15,760,049 of Participation, Series 2003, 5.250%, 2/01/30 - FGIC Insured 10,000 Orange County Water District, California, Revenue Certificates 8/13 at 100.00 AAA 10,231,800 of Participation, Series 2003B, 5.000%, 8/15/34 - MBIA Insured 1,000 Orange County Water District, California, Revenue Certificates 2/15 at 100.00 AAA 1,034,090 of Participation, Series 2005B, 5.000%, 8/15/24 - MBIA Insured 45 Nuveen Insured Premium Income Municipal Fund 2 (NPX) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA (continued) $ 1,435 Pasadena Area Community College District, Los Angeles 6/13 at 100.00 AAA $ 1,493,204 County, California, General Obligation Bonds, Series 2003A, 5.000%, 6/01/22 - FGIC Insured 12,265 Sacramento City Financing Authority, California, Capital 12/09 at 102.00 AAA 13,375,718 Improvement Revenue Bonds, Solid Waste and Redevelopment Projects, Series 1999, 5.800%, 12/01/19 (Pre-refunded 12/01/09) - AMBAC Insured 735 Sacramento City Financing Authority, California, Capital 12/09 at 102.00 AAA 797,379 Improvement Revenue Bonds, Solid Waste and Redevelopment Projects, Series 1999, 5.800%, 12/01/19 - AMBAC Insured San Diego County, California, Certificates of Participation, Edgemoor Facility Project and Regional System, Series 2005: 1,675 5.000%, 2/01/24 - AMBAC Insured 2/15 at 100.00 AAA 1,731,900 720 5.000%, 2/01/25 - AMBAC Insured 2/15 at 100.00 AAA 743,400 14,170 San Diego Unified School District, San Diego County, 7/15 at 100.00 AAA 14,669,917 California, General Obligation Bonds, Series 2005G, 5.000%, 7/01/29 - FSA Insured 2,000 San Jose Redevelopment Agency, California, Tax Allocation 8/14 at 100.00 AAA 2,134,340 Bonds, Merged Area Redevelopment Project, Series 2004A, 5.250%, 8/01/19 - MBIA Insured 5,000 Torrance, California, Certificates of Participation, Series 2005B, No Opt. Call AAA 5,172,950 5.000%, 6/01/24 - AMBAC Insured 12,500 University of California, Revenue Bonds, Multi-Purpose 5/13 at 100.00 AAA 12,862,125 Projects, Series 2003A, 5.000%, 5/15/33 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 132,970 Total California 112,599,564 ------------------------------------------------------------------------------------------------------------------------------------ COLORADO - 9.3% (6.2% OF TOTAL INVESTMENTS) 1,690 Adams 12 Five Star Schools, Adams County, Colorado, General 12/15 at 100.00 AAA 1,765,442 Obligation Bonds, Series 2005, 5.000%, 12/15/24 - FSA Insured 1,940 Colorado Educational and Cultural Facilities Authority, Charter 6/13 at 100.00 AAA 2,040,046 School Revenue Bonds, Adams School District 12 - Pinnacle School, Series 2003, 5.250%, 6/01/23 - XLCA Insured 3,405 Colorado Educational and Cultural Facilities Authority, Charter 12/13 at 100.00 AAA 3,591,049 School Revenue Bonds, Classical Academy, Series 2003, 5.250%, 12/01/23 - XLCA Insured 3,500 Colorado Health Facilities Authority, Revenue Bonds, Poudre 12/09 at 101.00 Aaa 3,759,770 Valley Healthcare Inc., Series 1999A, 5.750%, 12/01/23 (Pre-refunded 12/01/09) - FSA Insured 17,145 Denver Convention Center Hotel Authority, Colorado, Senior 12/13 at 100.00 AAA 18,174,385 Revenue Bonds, Convention Center Hotel, Series 2003A, 5.000%, 12/01/33 (Pre-refunded 12/01/13) - XLCA Insured 6,100 Denver School District 1, Colorado, General Obligation Bonds, 12/13 at 100.00 AAA 6,387,920 Series 2004, 5.000%, 12/01/18 - FSA Insured 1,325 El Paso County, Colorado, Certificates of Participation, Detention 12/12 at 100.00 AAA 1,356,681 Facility Project, Series 2002B, 5.000%, 12/01/27 - AMBAC Insured Jefferson County School District R1, Colorado, General Obligation Bonds, Series 2004: 2,500 5.000%, 12/15/22 - FSA Insured 12/14 at 100.00 AAA 2,609,350 5,125 5.000%, 12/15/23 - FSA Insured 12/14 at 100.00 AAA 5,337,944 2,000 5.000%, 12/15/24 - FSA Insured 12/14 at 100.00 AAA 2,081,660 1,000 University of Colorado, Enterprise System Revenue Bonds, 6/15 at 100.00 AAA 1,035,800 Series 2005, 5.000%, 6/01/30 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 45,730 Total Colorado 48,140,047 ------------------------------------------------------------------------------------------------------------------------------------ DISTRICT OF COLUMBIA - 0.6% (0.4% OF TOTAL INVESTMENTS) 3,140 District of Columbia Housing Finance Agency, GNMA 6/06 at 100.00 AAA 3,145,558 Collateralized Single Family Mortgage Revenue Bonds, Series 1990C-4, 6.350%, 12/01/24 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA - 0.8% (0.5% OF TOTAL INVESTMENTS) 4,000 Florida State Board of Education, Full Faith and Credit Public 6/13 at 101.00 AAA 4,161,760 Education Capital Outlay Bonds, Series 2003J, 5.000%, 6/01/22 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ GEORGIA - 3.8% (2.5% OF TOTAL INVESTMENTS) 4,000 Cobb County Development Authority, Georgia, Parking Revenue 7/14 at 100.00 Aaa 4,159,480 Bonds, Kennesaw State University, Series 2004, 5.000%, 7/15/24 - MBIA Insured 46 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ GEORGIA (continued) $ 2,925 Columbus, Georgia, Water and Sewerage Revenue Bonds, 5/14 at 100.00 AAA $ 3,043,375 Series 2005, 5.000%, 5/01/23 - MBIA Insured Municipal Electric Authority of Georgia, Combustion Turbine Revenue Bonds, Series 2003A: 1,775 5.000%, 11/01/21 - MBIA Insured 11/13 at 100.00 AAA 1,842,468 2,580 5.000%, 11/01/22 - MBIA Insured 11/13 at 100.00 AAA 2,674,712 4,500 South Fulton Municipal Regional Water and Sewerage 1/13 at 100.00 Aaa 4,613,850 Authority, Georgia, Water and Sewerage Revenue Bonds, Series 2003, 5.000%, 1/01/33 - MBIA Insured 3,000 Valdosta and Lowndes County Hospital Authority, Georgia, 10/12 at 101.00 AAA 3,149,730 Revenue Certificates, South Georgia Medical Center, Series 2002, 5.200%, 10/01/22 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 18,780 Total Georgia 19,483,615 ------------------------------------------------------------------------------------------------------------------------------------ HAWAII - 7.9% (5.3% OF TOTAL INVESTMENTS) 2,375 Hawaii County, Hawaii, General Obligation Bonds, 7/13 at 100.00 AAA 2,474,774 Series 2003A, 5.000%, 7/15/19 - FSA Insured 20,000 Hawaii Department of Budget and Finance, Special Purpose 7/10 at 101.00 AAA 21,257,398 Revenue Refunding Bonds, Hawaiian Electric Company Inc., Series 2000, 5.700%, 7/01/20 - AMBAC Insured (Alternative Minimum Tax) Hawaii Department of Transportation, Airport System Revenue Refunding Bonds, Series 2000B: 6,105 6.100%, 7/01/16 - FGIC Insured (Alternative Minimum Tax) 7/10 at 101.00 AAA 6,615,378 9,500 6.625%, 7/01/17 - FGIC Insured (Alternative Minimum Tax) 7/10 at 101.00 AAA 10,464,440 ------------------------------------------------------------------------------------------------------------------------------------ 37,980 Total Hawaii 40,811,990 ------------------------------------------------------------------------------------------------------------------------------------ IDAHO - 0.2% (0.1% OF TOTAL INVESTMENTS) 615 Idaho Housing and Finance Association, Single Family 1/08 at 101.50 AAA 619,889 Mortgage Bonds, Series 1998E, 5.450%, 7/01/18 - AMBAC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS - 3.1% (2.1% OF TOTAL INVESTMENTS) 1,015 Chicago Park District, Illinois, Limited Tax General Obligation 7/11 at 100.00 AAA 1,080,346 Park Bonds, Series 2001C, 5.500%, 1/01/18 - FGIC Insured 3,100 Chicago Park District, Illinois, Limited Tax General Obligation 7/11 at 100.00 AAA 3,350,573 Park Bonds, Series 2001C, 5.500%, 1/01/18 (Pre-refunded 7/01/11) - FGIC Insured Illinois Health Facilities Authority, Revenue Bonds, Lutheran General Health System, Series 1993A: 3,230 6.125%, 4/01/12 - FSA Insured (ETM) No Opt. Call AAA 3,452,935 5,000 6.250%, 4/01/18 - FSA Insured (ETM) No Opt. Call AAA 5,784,450 1,950 Illinois Health Facilities Authority, Revenue Refunding Bonds, No Opt. Call AAA 2,251,841 SSM Healthcare System, Series 1992AA, 6.550%, 6/01/14 - MBIA Insured 290 Peoria, Moline and Freeport, Illinois, GNMA Collateralized 10/06 at 104.00 AAA 293,706 Single Family Mortgage Revenue Bonds, Series 1995A, 7.600%, 4/01/27 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 14,585 Total Illinois 16,213,851 ------------------------------------------------------------------------------------------------------------------------------------ INDIANA - 0.9% (0.6% OF TOTAL INVESTMENTS) Hamilton County Public Building Corporation, Indiana, First Mortgage Bonds, Series 2004: 2,105 5.000%, 8/01/23 - FSA Insured 8/14 at 100.00 AAA 2,176,044 2,215 5.000%, 8/01/24 - FSA Insured 8/14 at 100.00 AAA 2,286,677 ------------------------------------------------------------------------------------------------------------------------------------ 4,320 Total Indiana 4,462,721 ------------------------------------------------------------------------------------------------------------------------------------ KANSAS - 0.3% (0.2% OF TOTAL INVESTMENTS) 1,500 Kansas Turnpike Authority, Revenue Bonds, Series 2004A-2, 9/14 at 101.00 AAA 1,563,270 5.000%, 9/01/27 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ KENTUCKY - 1.2% (0.8% OF TOTAL INVESTMENTS) 7,000 Kentucky Economic Development Finance Authority, Health No Opt. Call AAA 2,333,100 System Revenue Bonds, Norton Healthcare Inc., Series 2000B, 0.000%, 10/01/28 - MBIA Insured 3,575 Kentucky Turnpike Authority, Economic Development Road 7/15 at 100.00 AAA 3,722,934 Revenue Bonds, Revitalization Project, Series 2005B, 5.000%, 7/01/25 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 10,575 Total Kentucky 6,056,034 ------------------------------------------------------------------------------------------------------------------------------------ 47 Nuveen Insured Premium Income Municipal Fund 2 (NPX) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ LOUISIANA - 1.5% (1.0% OF TOTAL INVESTMENTS) $ 1,640 Louisiana Public Facilities Authority, Revenue Bonds, 7/14 at 100.00 AAA $ 1,728,986 Baton Rouge General Hospital, Series 2004, 5.250%, 7/01/24 - MBIA Insured Louisiana, Gasoline and Fuels Tax Revenue Bonds, Series 2005A: 1,200 5.000%, 5/01/25 - FGIC Insured 5/15 at 100.00 AAA 1,237,308 2,210 5.000%, 5/01/26 - FGIC Insured 5/15 at 100.00 AAA 2,275,416 2,500 5.000%, 5/01/27 - FGIC Insured 5/15 at 100.00 AAA 2,579,575 ------------------------------------------------------------------------------------------------------------------------------------ 7,550 Total Louisiana 7,821,285 ------------------------------------------------------------------------------------------------------------------------------------ MARYLAND - 0.4% (0.3% OF TOTAL INVESTMENTS) 1,865 Baltimore, Maryland, Senior Lien Convention Center Hotel 9/16 at 100.00 AAA 1,996,259 Revenue Bonds, Series 2006A, 5.250%, 9/01/26 - XLCA Insured ------------------------------------------------------------------------------------------------------------------------------------ MASSACHUSETTS - 5.7% (3.8% OF TOTAL INVESTMENTS) 3,000 Massachusetts Development Finance Authority, Revenue Bonds, No Opt. Call AAA 3,556,950 WGBH Educational Foundation, Series 2002A, 5.750%, 1/01/42 - AMBAC Insured 2,600 Massachusetts Health and Educational Facilities Authority, 10/13 at 100.00 AAA 2,670,460 Revenue Bonds, Simmons College, Series 2003F, 5.000%, 10/01/33 - FGIC Insured 10,925 Massachusetts School Building Authority, Dedicated Sales 8/15 at 100.00 AAA 11,424,272 Tax Revenue Bonds, Series 2005A, 5.000%, 8/15/22 - FSA Insured 4,910 Massachusetts, General Obligation Bonds, Consolidated Loan, No Opt. Call AAA 5,415,043 Series 2002C, 5.500%, 11/01/15 - MBIA Insured Massachusetts, Special Obligation Dedicated Tax Revenue Bonds, Series 2004: 3,650 5.250%, 1/01/22 (Pre-refunded 1/01/14) - FGIC Insured 1/14 at 100.00 AAA 3,917,582 2,000 5.250%, 1/01/24 (Pre-refunded 1/01/14) - FGIC Insured 1/14 at 100.00 AAA 2,146,620 ------------------------------------------------------------------------------------------------------------------------------------ 27,085 Total Massachusetts 29,130,927 ------------------------------------------------------------------------------------------------------------------------------------ MICHIGAN - 2.0% (1.3% OF TOTAL INVESTMENTS) 10,000 Michigan Housing Development Authority, Rental Housing 4/07 at 102.00 AAA 10,371,600 Revenue Bonds, Series 1997A, 6.000%, 4/01/16 - AMBAC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ MINNESOTA - 0.2% (0.1% OF TOTAL INVESTMENTS) 915 Minnesota Housing Finance Agency, Rental Housing Bonds, 8/06 at 101.00 AAA 922,347 Series 1995D, 5.950%, 2/01/18 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ MISSOURI - 0.4% (0.3% OF TOTAL INVESTMENTS) 975 Hazelwood Industrial Development Authority, Missouri, 9/06 at 102.00 AAA 999,151 GNMA Collateralized Project Multifamily Housing Revenue Refunding Bonds, Lakes Apartments Project, Series 1996, 6.000%, 9/20/16 535 Missouri Housing Development Commission, Multifamily 12/06 at 102.00 AAA 547,524 Housing Revenue Bonds, Brookstone Village Apartments, Series 1996A, 6.000%, 12/01/16 - FSA Insured (Alternative Minimum Tax) 750 Missouri Western State College, Auxiliary System Revenue 10/13 at 100.00 AAA 770,798 Bonds, Series 2003, 5.000%, 10/01/33 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 2,260 Total Missouri 2,317,473 ------------------------------------------------------------------------------------------------------------------------------------ NEBRASKA - 0.4% (0.3% OF TOTAL INVESTMENTS) Nebraska Public Power District, General Revenue Bonds, Series 2005A: 1,000 5.000%, 1/01/24 - FSA Insured 1/15 at 100.00 AAA 1,040,990 1,000 5.000%, 1/01/25 - FSA Insured 1/15 at 100.00 AAA 1,040,260 ------------------------------------------------------------------------------------------------------------------------------------ 2,000 Total Nebraska 2,081,250 ------------------------------------------------------------------------------------------------------------------------------------ NEVADA - 3.2% (2.1% OF TOTAL INVESTMENTS) 5,000 Clark County, Nevada, Industrial Development Revenue Bonds, 7/10 at 102.00 AAA 5,414,600 Southwest Gas Corporation, Series 2000C, 5.950%, 12/01/38 - AMBAC Insured (Alternative Minimum Tax) 3,280 Clark County, Nevada, Subordinate Lien Airport Revenue Bonds, 7/14 at 100.00 AAA 3,415,989 Series 2004A-2, 5.125%, 7/01/24 - FGIC Insured 48 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ NEVADA (continued) Director of Nevada State Department of Business and Industry, Revenue Bonds, Las Vegas Monorail Project, First Tier, Series 2000: $ 5,000 0.000%, 1/01/27 - AMBAC Insured No Opt. Call AAA $ 1,788,450 5,500 5.625%, 1/01/32 - AMBAC Insured 1/10 at 102.00 AAA 5,881,755 ------------------------------------------------------------------------------------------------------------------------------------ 18,780 Total Nevada 16,500,794 ------------------------------------------------------------------------------------------------------------------------------------ NEW JERSEY - 3.1% (2.1% OF TOTAL INVESTMENTS) Essex County Improvement Authority, New Jersey, Guaranteed Revenue Bonds, Project Consolidation, Series 2004: 2,000 5.125%, 10/01/21 - MBIA Insured 10/14 at 100.00 Aaa 2,104,680 2,250 5.125%, 10/01/22 - MBIA Insured 10/14 at 100.00 Aaa 2,366,145 1,560 Mount Olive Township Board of Education, Morris County, 1/15 at 100.00 Aaa 1,625,317 New Jersey, General Obligation Bonds, Series 2004, 5.000%, 1/15/22 - MBIA Insured New Jersey Economic Development Authority, Revenue Bonds, Motor Vehicle Surcharge, Series 2004A: 1,475 5.000%, 7/01/22 - MBIA Insured 7/14 at 100.00 AAA 1,531,537 1,475 5.000%, 7/01/23 - MBIA Insured 7/14 at 100.00 AAA 1,529,487 3,075 New Jersey Transit Corporation, Certificates of Participation No Opt. Call AAA 3,369,585 Refunding, Series 2003, 5.500%, 10/01/15 - FSA Insured 3,315 New Jersey Turnpike Authority, Revenue Bonds, Series 2005A, 1/15 at 100.00 AAA 3,448,462 5.000%, 1/01/25 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 15,150 Total New Jersey 15,975,213 ------------------------------------------------------------------------------------------------------------------------------------ NEW MEXICO - 0.9% (0.6% OF TOTAL INVESTMENTS) New Mexico Finance Authority, Public Project Revolving Fund Revenue Bonds, Series 2004C: 1,415 5.000%, 6/01/22 - AMBAC Insured 6/14 at 100.00 AAA 1,473,680 1,050 5.000%, 6/01/24 - AMBAC Insured 6/14 at 100.00 AAA 1,090,646 2,000 New Mexico Finance Authority, Public Project Revolving Fund 6/15 at 100.00 Aaa 2,077,880 Revenue Bonds, Series 2005E, 5.000%, 6/15/25 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 4,465 Total New Mexico 4,642,206 ------------------------------------------------------------------------------------------------------------------------------------ NEW YORK - 12.9% (8.6% OF TOTAL INVESTMENTS) 1,120 Dormitory Authority of the State of New York, FHA-Insured 2/15 at 100.00 AAA 1,163,792 Mortgage Revenue Bonds, Montefiore Hospital, Series 2004, 5.000%, 8/01/23 - FGIC Insured Dormitory Authority of the State of New York, Insured Revenue Bonds, New Island Hospital, Series 1999B: 3,400 5.750%, 7/01/19 - MBIA Insured 7/09 at 101.00 AAA 3,615,492 5,750 6.000%, 7/01/24 - MBIA Insured 7/09 at 101.00 AAA 6,170,325 1,785 Dormitory Authority of the State of New York, Revenue Bonds, 2/15 at 100.00 AAA 1,852,419 Mental Health Services Facilities Improvements, Series 2005A, 5.000%, 2/15/24 - AMBAC Insured 1,230 Dormitory Authority of the State of New York, Revenue Bonds, 2/15 at 100.00 AAA 1,276,457 Mental Health Services Facilities Improvements, Series 2005D, 5.000%, 8/15/24 - FGIC Insured 1,000 Dormitory Authority of the State of New York, State Personal 3/15 at 100.00 AAA 1,041,050 Income Tax Revenue Bonds, Series 2005F, 5.000%, 3/15/24 - AMBAC Insured 5,000 Long Island Power Authority, New York, Electric System General 6/16 at 100.00 AAA 5,211,100 Revenue Bonds, Series 2006A, 5.000%, 12/01/25 - FGIC Insured 1,755 Nassau County, New York, General Obligation Improvement 3/10 at 100.00 AAA 1,901,156 Bonds, Series 2000E, 6.000%, 3/01/16 (Pre-refunded 3/01/10) - FSA Insured 7,500 Nassau Health Care Corporation, New York, County Guaranteed 8/09 at 102.00 AAA 8,111,400 Revenue Bonds, Series 1999, 5.750%, 8/01/29 (Pre-refunded 8/01/09) - FSA Insured 1,250 New York City Municipal Water Finance Authority, New York, 6/15 at 100.00 AAA 1,301,538 Water and Sewerage System Revenue Bonds, Fiscal Series 2005C, 5.000%, 6/15/25 - MBIA Insured New York City Sales Tax Asset Receivable Corporation, New York, Dedicated Revenue Bonds, Local Government Assistance Corporation, Series 2004A: 3,225 5.000%, 10/15/24 - MBIA Insured 10/14 at 100.00 AAA 3,363,933 1,665 5.000%, 10/15/25 - MBIA Insured 10/14 at 100.00 AAA 1,736,728 49 Nuveen Insured Premium Income Municipal Fund 2 (NPX) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ NEW YORK (continued) $ 5,000 New York City, New York, General Obligation Bonds, Fiscal 11/14 at 100.00 AAA $ 5,209,200 Series 2004E, 5.000%, 11/01/21 - FSA Insured 8,880 New York State Housing Finance Agency, Mortgage Revenue 5/06 at 102.00 AAA 9,074,561 Refunding Bonds, Housing Project, Series 1996A, 6.125%, 11/01/20 - FSA Insured New York State Thruway Authority, General Revenue Bonds, Series 2005G: 3,770 5.000%, 1/01/25 - FSA Insured 7/15 at 100.00 AAA 3,926,003 5,980 5.000%, 1/01/26 - FSA Insured 7/15 at 100.00 AAA 6,222,908 5,000 New York State Thruway Authority, Highway and Bridge Trust 10/15 at 100.00 AAA 5,243,000 Fund Bonds, Second Generation, Series 2005B, 5.000%, 4/01/21 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 63,310 Total New York 66,421,062 ------------------------------------------------------------------------------------------------------------------------------------ NORTH CAROLINA - 1.8% (1.2% OF TOTAL INVESTMENTS) 1,250 Appalachian State University, North Carolina, Revenue Bonds, 7/15 at 100.00 Aaa 1,295,200 Series 2005, 5.000%, 7/15/30 - MBIA Insured Mooresville, North Carolina, Enterprise System Revenue Bonds, Series 2004: 2,225 5.000%, 5/01/23 - FGIC Insured 5/14 at 100.00 AAA 2,313,510 2,335 5.000%, 5/01/24 - FGIC Insured 5/14 at 100.00 AAA 2,426,299 2,900 Raleigh Durham Airport Authority, North Carolina, Airport 5/15 at 100.00 Aaa 3,024,961 Revenue Bonds, Series 2005A, 5.000%, 5/01/21 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 8,710 Total North Carolina 9,059,970 ------------------------------------------------------------------------------------------------------------------------------------ NORTH DAKOTA - 3.8% (2.5% OF TOTAL INVESTMENTS) 10,715 Fargo, North Dakota, Health System Revenue Bonds, MeritCare 6/10 at 101.00 AAA 11,376,758 Obligated Group, Series 2000A, 5.600%, 6/01/21 - FSA Insured 8,000 North Dakota, Student Loan Trust Revenue Bonds, 12/10 at 100.00 AAA 8,309,360 Series 2000B, 5.850%, 12/01/25 - AMBAC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 18,715 Total North Dakota 19,686,118 ------------------------------------------------------------------------------------------------------------------------------------ OHIO - 0.5% (0.4% OF TOTAL INVESTMENTS) 1,930 Marysville Exempted Village School District, Ohio, Certificates 6/15 at 100.00 AAA 2,086,465 of Participation, School Facilities Project, Series 2005, 5.250%, 12/01/22 (Pre-refunded 6/01/15) - MBIA Insured 700 Shaker Heights, Ohio, General Obligation Bonds, Series 2003, 12/13 at 100.00 AAA 738,577 5.250%, 12/01/26 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 2,630 Total Ohio 2,825,042 ------------------------------------------------------------------------------------------------------------------------------------ OKLAHOMA - 1.4% (0.9% OF TOTAL INVESTMENTS) 1,500 Oklahoma Capitol Improvement Authority, State Facilities 7/15 at 100.00 AAA 1,563,225 Revenue Bonds, Series 2005F, 5.000%, 7/01/24 - AMBAC Insured Oklahoma City Airport Trust, Oklahoma, Junior Lien Tax Exempt Bonds, Twenty Seventh Series 2000A: 1,320 5.125%, 7/01/20 - FSA Insured 7/10 at 100.00 AAA 1,353,370 4,040 5.250%, 7/01/21 - FSA Insured 7/10 at 100.00 AAA 4,206,933 ------------------------------------------------------------------------------------------------------------------------------------ 6,860 Total Oklahoma 7,123,528 ------------------------------------------------------------------------------------------------------------------------------------ OREGON - 3.6% (2.4% OF TOTAL INVESTMENTS) 2,110 Oregon Department of Administrative Services, Certificates 5/15 at 100.00 AAA 2,170,874 of Participation, Series 2005A, 5.000%, 5/01/30 - FSA Insured 1,520 Portland Housing Authority, Oregon, Multifamily Housing 7/10 at 100.00 Aaa 1,567,561 Revenue Bonds, Lovejoy Station Apartments, Series 2000, 6.000%, 7/01/33 - MBIA Insured (Alternative Minimum Tax) Portland, Oregon, Airport Way Urban Renewal and Redevelopment Bonds, Series 2000A: 4,405 5.700%, 6/15/17 (Pre-refunded 6/15/10) - AMBAC Insured 6/10 at 101.00 Aaa 4,769,646 3,665 5.750%, 6/15/18 (Pre-refunded 6/15/10) - AMBAC Insured 6/10 at 101.00 Aaa 3,975,352 4,265 5.750%, 6/15/19 (Pre-refunded 6/15/10) - AMBAC Insured 6/10 at 101.00 Aaa 4,626,160 1,375 5.750%, 6/15/20 (Pre-refunded 6/15/10) - AMBAC Insured 6/10 at 101.00 Aaa 1,491,435 ------------------------------------------------------------------------------------------------------------------------------------ 17,340 Total Oregon 18,601,028 ------------------------------------------------------------------------------------------------------------------------------------ 50 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA - 13.0% (8.7% OF TOTAL INVESTMENTS) $ 12,620 Allegheny County Hospital Development Authority, 11/10 at 102.00 AAA $ 14,066,630 Pennsylvania, Insured Revenue Bonds, West Penn Allegheny Health System, Series 2000A, 6.500%, 11/15/30 - MBIA Insured 2,000 Allegheny County Sanitary Authority, Pennsylvania, Sewerage 12/15 at 100.00 AAA 2,082,660 Revenue Bonds, Series 2005A, 5.000%, 12/01/23 - MBIA Insured 9,485 Berks County Municipal Authority, Pennsylvania, Hospital 11/09 at 102.00 AAA 10,347,566 Revenue Bonds, Reading Hospital and Medical Center, Series 1999, 6.000%, 11/01/19 (Pre-refunded 11/01/09) - FSA Insured 725 Central Dauphin School District, Dauphin County, Pennsylvania, 2/16 at 100.00 AAA 874,611 General Obligation Bonds, Series 2006, 6.750%, 2/01/24 (WI/DD, Settling 5/15/06) - MBIA Insured 5,780 Pennsylvania Higher Educational Facilities Authority, Revenue 5/15 at 100.00 AAA 5,981,260 Bonds, Drexel University, Series 2005A, 5.000%, 5/01/28 - MBIA Insured Philadelphia Gas Works, Pennsylvania, Revenue Bonds, General Ordinance, Fifth Series 2004A-1: 5,235 5.000%, 9/01/24 - FSA Insured 9/14 at 100.00 AAA 5,394,877 3,000 5.000%, 9/01/25 - FSA Insured 9/14 at 100.00 AAA 3,087,420 2,360 Philadelphia, Pennsylvania, Water and Wastewater Revenue 8/07 at 102.00 AAA 2,405,005 Bonds, Series 1997A, 5.125%, 8/01/27 - AMBAC Insured (ETM) 10,370 Philadelphia, Pennsylvania, Water and Wastewater Revenue 8/07 at 102.00 AAA 10,671,352 Bonds, Series 1997A, 5.125%, 8/01/27 - AMBAC Insured 3,785 Reading School District, Berks County, Pennsylvania, General 1/16 at 100.00 AAA 3,945,976 Obligation Bonds, Series 2005, 5.000%, 1/15/25 - FSA Insured 2,500 Seneca Valley School District, Butler County, Pennsylvania, 7/14 at 100.00 Aaa 2,626,150 General Obligation Bonds, Series2004, 5.125%, 1/01/23 - FGIC Insured 1,705 Solebury Township, Pennsylvania, General Obligation Bonds, 6/15 at 100.00 Aaa 1,774,001 Series 2005, 5.000%, 12/15/25 - AMBAC Insured 3,650 State Public School Building Authority, Pennsylvania, Lease 6/13 at 100.00 AAA 3,745,119 Revenue Bonds, Philadelphia School District, Series 2003, 5.000%, 6/01/29 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 63,215 Total Pennsylvania 67,002,627 ------------------------------------------------------------------------------------------------------------------------------------ PUERTO RICO - 0.5% (0.3% OF TOTAL INVESTMENTS) 2,500 Puerto Rico Electric Power Authority, Power Revenue Bonds, 7/15 at 100.00 AAA 2,628,475 Series 2005RR, 5.000%, 7/01/22 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ SOUTH CAROLINA - 1.0% (0.7% OF TOTAL INVESTMENTS) 5,000 South Carolina Public Service Authority, Revenue Bonds, 1/14 at 100.00 AAA 5,204,900 Santee Cooper Electric System, Series 2004A, 5.000%, 1/01/20 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ TEXAS - 14.9% (10.0% OF TOTAL INVESTMENTS) Brazos River Authority, Texas, Revenue Refunding Bonds, Houston Industries Inc., Series 1998C: 10,000 5.125%, 5/01/19 - AMBAC Insured 5/08 at 102.00 AAA 10,352,100 9,000 5.125%, 11/01/20 - AMBAC Insured 11/08 at 102.00 AAA 9,293,490 Corpus Christi, Texas, Utility System Revenue Bonds, Series 2004: 3,475 5.000%, 7/15/22 - FSA Insured 7/14 at 100.00 AAA 3,596,590 3,645 5.000%, 7/15/23 - FSA Insured 7/14 at 100.00 AAA 3,764,957 12,500 Dallas-Ft. Worth International Airport, Texas, Joint Revenue 11/09 at 100.00 AAA 13,014,625 Refunding and Improvement Bonds, Series 2001A, 5.500%, 11/01/35 - FGIC Insured (Alternative Minimum Tax) 4,485 Lower Colorado River Authority, Texas, Contract Revenue 5/12 at 100.00 AAA 4,636,055 Refunding Bonds, Transmission Services Corporation, Series 2003B, 5.000%, 5/15/21 - FSA Insured 10,000 Lower Colorado River Authority, Texas, Contract Revenue 5/13 at 100.00 AAA 10,199,000 Refunding Bonds, Transmission Services Corporation, Series 2003C, 5.000%, 5/15/33 - AMBAC Insured 4,151 Panhandle Regional Housing Finance Corporation, Texas, 7/12 at 105.00 Aaa 4,469,257 GNMA Collateralized Multifamily Housing Mortgage Revenue Bonds, Renaissance of Amarillo Apartments, Series 2001A, 6.650%, 7/20/42 Tarrant County Health Facilities Development Corporation, Texas, Hospital Revenue Bonds, Cook Children's Healthcare System, Series 2000A: 6,725 5.750%, 12/01/17 - FSA Insured 12/10 at 101.00 AAA 7,233,948 7,500 5.750%, 12/01/24 - FSA Insured 12/10 at 101.00 AAA 8,072,475 51 Nuveen Insured Premium Income Municipal Fund 2 (NPX) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ TEXAS (continued) $ 2,300 Texas State University System, Financing Revenue Refunding 3/12 at 100.00 AAA $ 2,384,571 Bonds, Series 2002, 5.000%, 3/15/18 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 73,781 Total Texas 77,017,068 ------------------------------------------------------------------------------------------------------------------------------------ UTAH - 3.3% (2.2% OF TOTAL INVESTMENTS) 8,600 Intermountain Power Agency, Utah, Power Supply Revenue 7/13 at 100.00 AAA 8,986,656 Refunding Bonds, Series 2003A, 5.000%, 7/01/18 - FSA Insured 2,385 Mountain Regional Water Special Service District, Utah, 12/13 at 100.00 AAA 2,446,461 Water Revenue Bonds, Series 2003, 5.000%, 12/15/33 - MBIA Insured 5,525 Utah Transit Authority, Sales Tax Revenue Bonds, Series 2002A, 12/12 at 100.00 AAA 5,711,303 5.000%, 6/15/24 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 16,510 Total Utah 17,144,420 ------------------------------------------------------------------------------------------------------------------------------------ VERMONT - 0.3% (0.1% OF TOTAL INVESTMENTS) 1,320 Vermont Educational and Health Buildings Financing Agency, 12/10 at 101.00 AAA 1,435,012 Revenue Bonds, Fletcher Allen Health Care Inc., Series 2000A, 6.000%, 12/01/23 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ VIRGINIA - 3.0% (2.0% OF TOTAL INVESTMENTS) Greater Richmond Convention Center Authority, Virginia, Hotel Tax Revenue Bonds, Series 2005: 5,880 5.000%, 6/15/20 - MBIA Insured 6/15 at 100.00 AAA 6,135,898 5,000 5.000%, 6/15/22 - MBIA Insured 6/15 at 100.00 AAA 5,206,150 Loudoun County Industrial Development Authority, Virginia, Lease Revenue Bonds, Public Safety Facilities, Series 2003A: 1,150 5.250%, 12/15/22 - FSA Insured 6/14 at 100.00 AAA 1,226,268 500 5.250%, 12/15/23 - FSA Insured 6/14 at 100.00 AAA 532,450 2,250 Virginia Housing Development Authority, Multifamily Housing 1/08 at 102.00 AAA 2,324,655 Bonds, Series 1997B, 6.050%, 5/01/17 - MBIA Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 14,780 Total Virginia 15,425,421 ------------------------------------------------------------------------------------------------------------------------------------ WASHINGTON - 6.9% (4.6% OF TOTAL INVESTMENTS) 10,000 Chelan County Public Utility District 1, Washington, Hydro 7/11 at 101.00 AAA 10,615,800 Consolidated System Revenue Bonds, Series 2001B, 5.600%, 1/01/36 - MBIA Insured (Alternative Minimum Tax) 1,370 Clark County School District 101, La Center, Washington, 12/12 at 100.00 Aaa 1,418,525 General Obligation Bonds, Series 2002, 5.000%, 12/01/22 - FSA Insured 5,230 Douglas County Public Utility District 1, Washington, Revenue 9/09 at 102.00 AAA 5,651,172 Bonds, Wells Hydroelectric, Series 1999A, 6.125%, 9/01/29 - MBIA Insured (Alternative Minimum Tax) 1,545 Tacoma, Washington, General Obligation Bonds, Series 2004, 12/14 at 100.00 AAA 1,610,106 5.000%, 12/01/19 - MBIA Insured 3,950 Washington State Healthcare Facilities Authority, Revenue 11/08 at 101.00 Aaa 4,074,464 Bonds, Swedish Health Services, Series 1998, 5.125%, 11/15/22 - AMBAC Insured 10,855 Washington, General Obligation Bonds, Series 2000S-5, No Opt. Call AAA 5,659,363 0.000%, 1/01/20 - FGIC Insured 6,200 Washington, General Obligation Various Purpose Bonds, 7/12 at 100.00 AAA 6,417,496 Series 2003A, 5.000%, 7/01/20 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 39,150 Total Washington 35,446,926 ------------------------------------------------------------------------------------------------------------------------------------ WEST VIRGINIA - 1.6% (1.0% OF TOTAL INVESTMENTS) 8,000 Pleasants County, West Virginia, Pollution Control Revenue 5/06 at 101.00 AAA 8,070,720 Bonds, Monongahela Power Company Pleasants Station Project, Series 1995C, 6.150%, 5/01/15 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ WISCONSIN - 6.4% (4.3% OF TOTAL INVESTMENTS) 7,000 La Crosse, Wisconsin, Resource Recovery Revenue Refunding No Opt. Call AAA 8,073,800 Bonds, Northern States Power Company Project, Series 1996, 6.000%, 11/01/21 - MBIA Insured (Alternative Minimum Tax) 12,750 Milwaukee County, Wisconsin, Airport Revenue Bonds, 12/10 at 100.00 Aaa 13,493,835 Series 2000A, 5.750%, 12/01/25 - FGIC Insured (Alternative Minimum Tax) 5,000 Wisconsin Health and Educational Facilities Authority, Revenue 8/06 at 101.00 AAA 5,108,700 Bonds, Mercy Health System Corporation, Series 1995, 6.125%, 8/15/13 - AMBAC Insured 52 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ WISCONSIN (continued) $ 6,250 Wisconsin Health and Educational Facilities Authority, 8/06 at 102.00 AAA $ 6,408,625 Revenue Bonds, Sinai Samaritan Medical Center Inc., Series 1996, 5.750%, 8/15/16 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 31,000 Total Wisconsin 33,084,960 ------------------------------------------------------------------------------------------------------------------------------------ $ 774,671 Total Investments (cost $750,969,130) - 150.2% 773,963,705 =============----------------------------------------------------------------------------------------------------------------------- Other Assets Less Liabilities - 2.0% 10,147,058 -------------------------------------------------------------------------------------------------------------------- Preferred Shares, at Liquidation Value - (52.2)% (268,900,000) -------------------------------------------------------------------------------------------------------------------- Net Assets Applicable to Common Shares - 100% $ 515,210,763 ==================================================================================================================== All of the bonds in the Portfolio of Investments are either covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance, or are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, any of which ensure the timely payment of principal and interest. (1) All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted. (2) Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns. (3) Ratings: Using the higher of Standard & Poor's or Moody's rating. Ratings below BBB by Standard & Poor's Group or Baa by Moody's Investor Service, Inc. are considered to be below investment grade. WI/DD Purchased on a when-issued or delayed delivery basis. (ETM) Escrowed to maturity. See accompanying notes to financial statements. 53 Nuveen Insured Dividend Advantage Municipal Fund (NVG) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ALABAMA - 4.3% (2.8% OF TOTAL INVESTMENTS) $ 5,310 Athens, Alabama, Water and Sewerage Revenue Warrants, 5/12 at 101.00 AAA $ 5,594,881 Series 2002, 5.300%, 5/01/32 - MBIA Insured 3,045 Hoover, Alabama, General Obligation Bonds, Series 2003, 3/12 at 101.00 AAA 3,161,776 5.000%, 3/01/20 - MBIA Insured 10,000 Jefferson County, Alabama, Sewer Revenue Capital Improvement 2/09 at 101.00 AAA 10,521,900 Warrants, Series 1999A, 5.375%, 2/01/36 (Pre-refunded 2/01/09) - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ 18,355 Total Alabama 19,278,557 ------------------------------------------------------------------------------------------------------------------------------------ ALASKA - 3.6% (2.4% OF TOTAL INVESTMENTS) 15,000 Alaska, International Airport System Revenue Bonds, 10/12 at 100.00 AAA 16,162,650 Series 2002B, 5.250%, 10/01/27 (Pre-refunded 10/01/12) - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ ARIZONA - 1.1% (0.8% OF TOTAL INVESTMENTS) 5,000 Phoenix, Arizona, Civic Improvement Corporation, Senior Lien 7/12 at 100.00 AAA 5,144,200 Airport Revenue Bonds, Series 2002B, 5.250%, 7/01/32 - FGIC Insured (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA - 11.7% (7.8% OF TOTAL INVESTMENTS) California Educational Facilities Authority, Revenue Bonds, Occidental College, Series 2005A: 1,485 5.000%, 10/01/26 - MBIA Insured 10/15 at 100.00 Aaa 1,547,845 1,565 5.000%, 10/01/27 - MBIA Insured 10/15 at 100.00 Aaa 1,626,348 190 California, General Obligation Bonds, Series 2000, 9/10 at 100.00 AAA 199,850 5.250%, 9/01/17 - MBIA Insured California, General Obligation Bonds, Series 2000: 375 5.250%, 9/01/17 (Pre-refunded 9/01/10) - MBIA Insured 9/10 at 100.00 AAA 398,329 2,635 5.250%, 9/01/17 (Pre-refunded 9/01/10) - MBIA Insured 9/10 at 100.00 AAA 2,789,174 10,000 California, General Obligation Refunding Bonds, Series 2002, No Opt. Call AAA 10,319,600 5.000%, 2/01/23 - MBIA Insured 8,890 California, General Obligation Veterans Welfare Bonds, 12/08 at 101.00 AA- 9,132,964 Series 1997BH, 5.400%, 12/01/14 (Alternative Minimum Tax) 3,000 California, General Obligation Veterans Welfare Bonds, 6/07 at 101.00 AAA 3,075,360 Series 2001BZ, 5.375%, 12/01/24 - MBIA Insured (Alternative Minimum Tax) 2,425 Fullerton Public Financing Authority, California, Tax Allocation 9/15 at 100.00 AAA 2,504,346 Revenue Bonds, Series 2005, 5.000%, 9/01/27 - AMBAC Insured 625 Los Angeles Department of Water and Power, California, 7/16 at 100.00 AAA 648,956 Waterworks Revenue Bonds, Series 2006A-1, 5.000%, 7/01/36 - AMBAC Insured 1,800 Los Angeles Unified School District, California, General 7/16 at 100.00 AAA 1,880,946 Obligation Bonds, Series 2006F, 5.000%, 7/01/25 - FGIC Insured 7,935 Los Angeles, California, Certificates of Participation, 4/12 at 100.00 AAA 8,291,043 Series 2002, 5.300%, 4/01/32 - AMBAC Insured 7,500 Northern California Power Agency, Revenue Refunding Bonds, 7/08 at 101.00 AAA 7,753,125 Hydroelectric Project 1, Series 1998A, 5.200%, 7/01/32 - MBIA Insured 2,320 Sacramento Municipal Utility District, California, Electric 8/11 at 100.00 AAA 2,459,896 Revenue Bonds, Series 2001P, 5.250%, 8/15/18 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 50,745 Total California 52,627,782 ------------------------------------------------------------------------------------------------------------------------------------ COLORADO - 4.5% (3.0% OF TOTAL INVESTMENTS) 17,300 Adams County, Colorado, FHA-Insured Mortgage Revenue 8/15 at 100.00 AAA 17,908,095 Bonds, Platte Valley Medical Center, Series 2005, 5.000%, 8/01/24 - MBIA Insured 750 Arkansas River Power Authority, Colorado, Power Revenue 10/16 at 100.00 AAA 797,333 Bonds, Series 2006, 5.250%, 10/01/32 - XLCA Insured 54 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ COLORADO (continued) $ 1,625 Superior Metropolitan District 1, Colorado, Special Revenue 12/15 at 100.00 AAA $ 1,679,340 Bonds, Series 2006, 5.000%, 12/01/28 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 19,675 Total Colorado 20,384,768 ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA - 13.1% (8.7% OF TOTAL INVESTMENTS) Florida Municipal Loan Council, Revenue Bonds, Series 2003B: 2,305 5.250%, 12/01/17 - MBIA Insured 12/13 at 100.00 AAA 2,452,843 1,480 5.250%, 12/01/18 - MBIA Insured 12/13 at 100.00 AAA 1,573,536 11,600 Greater Orlando Aviation Authority, Florida, Airport Facilities 10/12 at 100.00 AAA 11,931,180 Revenue Bonds, Series 2002B, 5.125%, 10/01/21 - FSA Insured (Alternative Minimum Tax) 6,000 JEA, Florida, Water and Sewerage System Revenue Bonds, 4/07 at 100.00 AAA 6,084,840 Series 2002A, 5.500%, 10/01/41 - MBIA Insured 8,155 Lee County, Florida, Solid Waste System Revenue Refunding 10/11 at 100.00 Aaa 8,699,020 Bonds, Series 2001, 5.625%, 10/01/13 - MBIA Insured (Alternative Minimum Tax) Miami-Dade County, Florida, Aviation Revenue Bonds, Miami International Airport, Series 2002: 7,165 5.625%, 10/01/15 - FGIC Insured (Alternative Minimum Tax) 10/12 at 100.00 AAA 7,709,397 5,600 5.750%, 10/01/16 - FGIC Insured (Alternative Minimum Tax) 10/12 at 100.00 AAA 6,036,744 10,000 5.125%, 10/01/21 - FGIC Insured (Alternative Minimum Tax) 10/12 at 100.00 AAA 10,319,100 2,000 5.250%, 10/01/22 - FGIC Insured (Alternative Minimum Tax) 10/12 at 100.00 AAA 2,083,380 1,000 Orange County, Florida, Sales Tax Revenue Bonds, Series 2002B, 1/13 at 100.00 AAA 1,031,810 5.000%, 1/01/25 - FGIC Insured 1,000 Tallahassee, Florida, Energy System Revenue Bonds, Series 2005, 10/15 at 100.00 AAA 1,034,530 5.000%, 10/01/28 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 56,305 Total Florida 58,956,380 ------------------------------------------------------------------------------------------------------------------------------------ GEORGIA - 2.2% (1.5% OF TOTAL INVESTMENTS) 6,925 Atlanta and Fulton County Recreation Authority, Georgia, 12/15 at 100.00 AAA 7,167,444 Guaranteed Revenue Bonds, Park Improvement, Series 2005A, 5.000%, 12/01/30 - MBIA Insured 1,000 Atlanta, Georgia, Water and Wastewater Revenue Bonds, 11/14 at 100.00 AAA 1,040,400 Series 2004, 5.000%, 11/01/22 - FSA Insured 1,695 Georgia Housing and Finance Authority, Single Family Mortgage 12/11 at 100.00 AAA 1,737,053 Bonds, Series 2002B-2, 5.500%, 6/01/32 (Alternative Minimum Tax) ------------------------------------------------------------------------------------------------------------------------------------ 9,620 Total Georgia 9,944,897 ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS - 14.9% (10.0% OF TOTAL INVESTMENTS) 10,000 Bolingbrook, Illinois, General Obligation Bonds, Series 2002A, 1/12 at 100.00 AAA 10,571,700 5.375%, 1/01/38 - FGIC Insured 1,305 Chicago, Illinois, General Obligation Bonds, Series 2001A, 1/11 at 101.00 AAA 1,390,256 5.500%, 1/01/38 - MBIA Insured Chicago, Illinois, General Obligation Bonds, Series 2001A: 50 5.500%, 1/01/38 (Pre-refunded 1/01/11) - MBIA Insured 1/11 at 101.00 AAA 54,127 3,645 5.500%, 1/01/38 (Pre-refunded 1/01/11) - MBIA Insured 1/11 at 101.00 AAA 3,945,822 12,765 Chicago, Illinois, Revenue Bonds, Skyway Toll Bridge, 1/07 at 102.00 AAA 13,171,693 Series 1996, 5.500%, 1/01/23 (Pre-refunded 1/01/07) - MBIA Insured Chicago, Illinois, Second Lien Passenger Facility Charge Revenue Bonds, O'Hare International Airport, Series 2001C: 4,250 5.500%, 1/01/16 - AMBAC Insured (Alternative Minimum Tax) 1/11 at 101.00 AAA 4,482,560 4,485 5.500%, 1/01/17 - AMBAC Insured (Alternative Minimum Tax) 1/11 at 101.00 AAA 4,730,419 4,730 5.500%, 1/01/18 - AMBAC Insured (Alternative Minimum Tax) 1/11 at 101.00 AAA 4,988,826 2,930 5.500%, 1/01/19 - AMBAC Insured (Alternative Minimum Tax) 1/11 at 101.00 AAA 3,078,844 3,600 Chicago, Illinois, Third Lien General Airport Revenue Bonds, 1/16 at 100.00 AAA 3,828,564 O'Hare International Airport, Series 2005A, 5.250%, 1/01/24 - MBIA Insured 3,000 Chicago, Illinois, Third Lien General Airport Revenue Refunding 1/12 at 100.00 AAA 3,209,790 Bonds, O'Hare International Airport, Series 2002A, 5.750%, 1/01/17 - MBIA Insured (Alternative Minimum Tax) 4,000 Cicero, Cook County, Illinois, General Obligation Corporate 12/12 at 101.00 AAA 4,158,560 Purpose Bonds, Series 2002, 5.000%, 12/01/21 - MBIA Insured 730 DuPage County Community School District 200, Wheaton, 10/13 at 100.00 Aaa 774,705 Illinois, General Obligation Bonds, Series 2003C, 5.250%, 10/01/22 - FSA Insured 55 Nuveen Insured Dividend Advantage Municipal Fund (NVG) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS (continued) $ 770 DuPage County Community School District 200, Wheaton, 10/13 at 100.00 Aaa $ 833,078 Illinois, General Obligation Bonds, Series 2003C, 5.250%, 10/01/22 (Pre-refunded 10/01/13) - FSA Insured 5,000 Illinois, General Obligation Bonds, Illinois FIRST Program, 4/12 at 100.00 AAA 5,276,700 Series 2002, 5.250%, 4/01/23 - FSA Insured 2,700 University of Illinois, Certificates of Participation, Utility 8/11 at 100.00 AAA 2,857,302 Infrastructure Projects, Series 2001A, 5.000%, 8/15/20 (Pre-refunded 8/15/11) - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 63,960 Total Illinois 67,352,946 ------------------------------------------------------------------------------------------------------------------------------------ INDIANA - 17.2% (11.5% OF TOTAL INVESTMENTS) 3,380 Evansville, Indiana, Sewerage Works Revenue Refunding Bonds, 7/13 at 100.00 AAA 3,510,806 Series 2003A, 5.000%, 7/01/20 - AMBAC Insured Indiana Bond Bank, Special Program Bonds, Hendricks County Redevelopment District, Series 2002D: 2,500 5.375%, 4/01/23 - AMBAC Insured 4/12 at 100.00 AAA 2,642,525 7,075 5.250%, 4/01/26 - AMBAC Insured 4/12 at 100.00 AAA 7,446,862 7,000 5.250%, 4/01/30 - AMBAC Insured 4/12 at 100.00 AAA 7,367,920 10,000 Indiana Health Facility Financing Authority, Hospital Revenue 7/12 at 100.00 AAA 10,339,900 Bonds, Marion General Hospital, Series 2002, 5.250%, 7/01/32 - AMBAC Insured 25,000 Indianapolis Local Public Improvement Bond Bank, Indiana, 7/12 at 100.00 AAA 26,856,246 Waterworks Project, Series 2002A, 5.250%, 7/01/33 (Pre-refunded 7/01/12) - MBIA Insured New Albany-Floyd County School Building Corporation, Indiana, First Mortgage Bonds, Series 2002: 2,500 5.750%, 7/15/17 (Pre-refunded 7/15/12) - FGIC Insured 7/12 at 100.00 AAA 2,754,750 3,810 5.750%, 7/15/20 (Pre-refunded 7/15/12) - FGIC Insured 7/12 at 100.00 AAA 4,198,239 Northern Wells Community School Building Corporation, Wells County, Indiana, First Mortgage Bonds, Series 2001: 420 5.250%, 1/15/19 - FGIC Insured 7/12 at 100.00 AAA 440,429 430 5.250%, 7/15/19 - FGIC Insured 7/12 at 100.00 AAA 451,491 1,675 5.400%, 7/15/23 - FGIC Insured 7/12 at 100.00 AAA 1,776,572 6,960 Valparaiso Middle School Building Corporation, Indiana, 1/13 at 100.00 AAA 7,175,551 First Mortgage Refunding Bonds, Series 2002, 5.000%, 7/15/24 - MBIA Insured 2,490 Whitley County Middle School Building Corporation, Columbia 7/13 at 100.00 AAA 2,599,311 City, Indiana, First Mortgage Bonds, Series 2003, 5.000%, 1/15/18 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 73,240 Total Indiana 77,560,602 ------------------------------------------------------------------------------------------------------------------------------------ LOUISIANA - 0.7% (0.5% OF TOTAL INVESTMENTS) 3,085 New Orleans, Louisiana, General Obligation Refunding Bonds, 9/12 at 100.00 AAA 3,181,067 Series 2002, 5.125%, 9/01/21 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ MASSACHUSETTS - 1.8% (1.2% OF TOTAL INVESTMENTS) 2,630 Massachusetts College Building Authority, Project Revenue 5/16 at 100.00 AAA 2,723,207 Bonds, Series 2006A, 5.000%, 5/01/31 - AMBAC Insured 5,000 Massachusetts, General Obligation Bonds, Consolidated Loan, 8/14 at 100.00 AAA 5,287,850 Series 2004B, 5.000%, 8/01/22 (Pre-refunded 8/01/14) - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 7,630 Total Massachusetts 8,011,057 ------------------------------------------------------------------------------------------------------------------------------------ MISSOURI - 2.4% (1.6% OF TOTAL INVESTMENTS) 1,600 St. Louis County Pattonville School District R3, Missouri, 3/14 at 100.00 AAA 1,705,664 General Obligation Bonds, Series 2004, 5.250%, 3/01/19 - FSA Insured 8,735 St. Louis, Missouri, Airport Revenue Bonds, Airport Development 7/11 at 100.00 AAA 9,339,287 Program, Series 2001A, 5.250%, 7/01/31 (Pre-refunded 7/01/11) - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 10,335 Total Missouri 11,044,951 ------------------------------------------------------------------------------------------------------------------------------------ NEBRASKA - 1.9% (1.3% OF TOTAL INVESTMENTS) 6,360 Lincoln, Nebraska, Electric System Revenue Bonds, 9/15 at 100.00 AA 6,548,574 Series 2005, 5.000%, 9/01/32 56 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ NEBRASKA (continued) Municipal Energy Agency of Nebraska, Power Supply System Revenue Bonds, Series 2003A: $ 1,000 5.250%, 4/01/20 - FSA Insured 4/13 at 100.00 AAA $ 1,058,310 1,000 5.250%, 4/01/21 - FSA Insured 4/13 at 100.00 AAA 1,059,290 ------------------------------------------------------------------------------------------------------------------------------------ 8,360 Total Nebraska 8,666,174 ------------------------------------------------------------------------------------------------------------------------------------ NEVADA - 4.3% (2.9% OF TOTAL INVESTMENTS) 9,810 Clark County School District, Nevada, General Obligation Bonds, 6/12 at 100.00 AAA 10,402,230 Series 2002C, 5.000%, 6/15/21 (Pre-refunded 6/15/12) - MBIA Insured 8,750 Truckee Meadows Water Authority, Nevada, Water Revenue 7/11 at 100.00 AAA 9,140,512 Bonds, Series 2001A, 5.250%, 7/01/34 (Pre-refunded 7/01/11) - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 18,560 Total Nevada 19,542,742 ------------------------------------------------------------------------------------------------------------------------------------ NEW YORK - 3.7% (2.5% OF TOTAL INVESTMENTS) 1,120 Dormitory Authority of the State of New York, FHA-Insured 2/15 at 100.00 AAA 1,163,792 Mortgage Revenue Bonds, Montefiore Hospital, Series 2004, 5.000%, 8/01/23 - FGIC Insured 3,660 Dormitory Authority of the State of New York, Revenue Bonds, 2/15 at 100.00 AAA 3,809,035 Mental Health Services Facilities Improvements, Series 2005B, 5.000%, 2/15/23 - AMBAC Insured 1,500 Metropolitan Transportation Authority, New York, Transportation 11/15 at 100.00 AAA 1,554,705 Revenue Bonds, Series 2005B, 5.000%, 11/15/30 - AMBAC Insured 10,000 Metropolitan Transportation Authority, New York, Transportation 11/12 at 100.00 AAA 10,253,800 Revenue Refunding Bonds, Series 2002A, 5.000%, 11/15/30 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 16,280 Total New York 16,781,332 ------------------------------------------------------------------------------------------------------------------------------------ NORTH CAROLINA - 0.6% (0.3% OF TOTAL INVESTMENTS) 2,435 North Carolina Medical Care Commission, FHA-Insured 10/13 at 100.00 AAA 2,596,928 Mortgage Revenue Bonds, Betsy Johnson Regional Hospital Project, Series 2003, 5.375%, 10/01/24 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ OREGON - 1.8% (1.2% OF TOTAL INVESTMENTS) Oregon, General Obligation Veterans Welfare Bonds, Series 82: 5,560 5.375%, 12/01/31 12/11 at 100.00 AA- 5,668,476 2,590 5.500%, 12/01/42 12/11 at 100.00 AA- 2,640,479 ------------------------------------------------------------------------------------------------------------------------------------ 8,150 Total Oregon 8,308,955 ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA - 5.4% (3.6% OF TOTAL INVESTMENTS) 4,500 Allegheny County, Pennsylvania, Airport Revenue Refunding No Opt. Call AAA 4,876,200 Bonds, Pittsburgh International Airport, Series 1997A, 5.750%, 1/01/13 - MBIA Insured (Alternative Minimum Tax) 1,000 Pennsylvania Higher Educational Facilities Authority, Revenue 11/13 at 100.00 AA 1,055,940 Bonds, Lycoming College, Series 2003-AA2, 5.250%, 11/01/16 - RAAI Insured 5,000 Pennsylvania Higher Educational Facilities Authority, Revenue 7/08 at 100.00 AAA 5,190,700 Bonds, University of Pennsylvania, Series 1998, 5.500%, 7/15/38 (Pre-refunded 7/15/08) - MBIA Insured Philadelphia Municipal Authority, Pennsylvania, Lease Revenue Bonds, Series 2003B: 3,540 5.250%, 11/15/16 - FSA Insured 11/13 at 100.00 AAA 3,728,611 2,000 5.250%, 11/15/18 - FSA Insured 11/13 at 100.00 AAA 2,100,920 Philadelphia, Pennsylvania, General Obligation Bonds, Series 2003A: 3,090 5.250%, 2/15/14 - XLCA Insured 2/13 at 100.00 AAA 3,283,681 1,000 5.250%, 2/15/15 - XLCA Insured 2/13 at 100.00 AAA 1,057,220 2,000 Reading School District, Berks County, Pennsylvania, General 1/16 at 100.00 AAA 2,106,020 Obligation Bonds, Series 2005, 5.000%, 1/15/19 - FSA Insured 1,000 State Public School Building Authority, Pennsylvania, Lease 6/13 at 100.00 AAA 1,034,320 Revenue Bonds, Philadelphia School District, Series 2003, 5.000%, 6/01/23 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 23,130 Total Pennsylvania 24,433,612 ------------------------------------------------------------------------------------------------------------------------------------ 57 Nuveen Insured Dividend Advantage Municipal Fund (NVG) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ PUERTO RICO - 0.3% (0.1% OF TOTAL INVESTMENTS) $ 1,225 Puerto Rico Municipal Finance Agency, Series 2005C, No Opt. Call AAA $ 1,340,469 5.250%, 8/01/21 - CIFG Insured ------------------------------------------------------------------------------------------------------------------------------------ SOUTH CAROLINA - 1.0% (0.7% OF TOTAL INVESTMENTS) Greenville, South Carolina, Tax Increment Revenue Improvement Bonds, Series 2003: 1,000 5.500%, 4/01/17 - MBIA Insured 4/13 at 100.00 AAA 1,080,810 2,300 5.000%, 4/01/21 - MBIA Insured 4/13 at 100.00 AAA 2,387,101 1,000 Scago Educational Facilities Corporation, South Carolina, 10/15 at 100.00 AAA 1,038,420 Installment Purchase Revenue Bonds, Spartanburg County School District 5, Series 2005, 5.000%, 4/01/21 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 4,300 Total South Carolina 4,506,331 ------------------------------------------------------------------------------------------------------------------------------------ TENNESSEE - 9.3% (6.2% OF TOTAL INVESTMENTS) Memphis, Tennessee, Sanitary Sewerage System Revenue Bonds, Series 2004: 1,495 5.000%, 10/01/19 - FSA Insured 10/14 at 100.00 AAA 1,567,717 1,455 5.000%, 10/01/20 - FSA Insured 10/14 at 100.00 AAA 1,522,628 1,955 5.000%, 10/01/21 - FSA Insured 10/14 at 100.00 AAA 2,043,073 10,000 Memphis-Shelby County Sports Authority, Tennessee, Revenue 11/12 at 100.00 AAA 10,360,000 Bonds, Memphis Arena, Series 2002A, 5.125%, 11/01/28 - AMBAC Insured 10,000 Memphis-Shelby County Sports Authority, Tennessee, Revenue 11/12 at 100.00 AAA 10,343,500 Bonds, Memphis Arena, Series 2002B, 5.125%, 11/01/29 - AMBAC Insured 15,195 Tennessee State School Bond Authority, Higher Educational 5/12 at 100.00 AAA 15,942,290 Facilities Second Program Bonds, Series 2002A, 5.250%, 5/01/32 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 40,100 Total Tennessee 41,779,208 ------------------------------------------------------------------------------------------------------------------------------------ TEXAS - 27.5% (18.3% OF TOTAL INVESTMENTS) 3,500 Dallas-Ft. Worth International Airport, Texas, Joint Revenue 11/11 at 100.00 AAA 3,779,475 Refunding and Improvement Bonds, Series 2001A, 5.750%, 11/01/13 - FGIC Insured (Alternative Minimum Tax) 10,000 Gainesville Hospital District, Texas, Limited Tax General 8/11 at 100.00 AAA 10,361,900 Obligation Bonds, Series 2002, 5.375%, 8/15/32 - MBIA Insured 1,210 Galveston, Texas, General Obligation Bonds, Series 2001, 5/11 at 100.00 AAA 1,266,120 5.250%, 5/01/21 - AMBAC Insured 2,435 Galveston, Texas, General Obligation Bonds, Series 2001, 5/11 at 100.00 AAA 2,597,512 5.250%, 5/01/21 (Pre-refunded 5/01/11) - AMBAC Insured Harris County Health Facilities Development Corporation, Texas, Thermal Utility Revenue Bonds, TECO Project, Series 2003: 2,240 5.000%, 11/15/16 - MBIA Insured 11/13 at 100.00 AAA 2,328,525 2,355 5.000%, 11/15/17 - MBIA Insured 11/13 at 100.00 AAA 2,440,416 13,000 Houston Area Water Corporation, Texas, Contract Revenue 3/12 at 100.00 AAA 13,325,260 Bonds, Northeast Water Purification Plant, Series 2002, 5.125%, 3/01/32 - FGIC Insured 2,500 Houston Higher Education Finance Corporation, Texas, Revenue 11/09 at 101.00 AAA 2,655,625 Bonds, Rice University, Series 1999A, 5.375%, 11/15/29 (Pre-refunded 11/15/09) 1,000 Houston, Texas, First Lien Combined Utility System Revenue 5/14 at 100.00 AAA 1,055,320 Bonds, Series 2004A, 5.250%, 5/15/24 - FGIC Insured 4,345 San Antonio, Texas, Water System Senior Lien Revenue 5/12 at 100.00 AAA 4,668,746 Refunding Bonds, Series 2002, 5.500%, 5/15/17 - FSA Insured 6,000 Texas Department of Housing and Community Affairs, 7/11 at 100.00 AAA 6,203,340 Residential Mortgage Revenue Bonds, Series 2001A, 5.350%, 7/01/33 (Alternative Minimum Tax) 58 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ TEXAS (continued) $ 8,635 Texas Department of Housing and Community Affairs, Single 3/12 at 100.00 AAA $ 8,846,471 Family Mortgage Bonds, Series 2002B, 5.550%, 9/01/33 - MBIA Insured (Alternative Minimum Tax) Texas Public Finance Authority, Revenue Bonds, Texas Southern University Financing System, Series 2002: 3,520 5.125%, 11/01/20 - MBIA Insured 5/12 at 100.00 Aaa 3,673,261 3,520 5.125%, 11/01/21 - MBIA Insured 5/12 at 100.00 Aaa 3,680,477 Texas Student Housing Authority, Revenue Bonds, Austin Project, Senior Series 2001A: 9,400 5.375%, 1/01/23 - MBIA Insured 1/12 at 102.00 Aaa 9,982,706 11,665 5.500%, 1/01/33 - MBIA Insured 1/12 at 102.00 Aaa 12,575,220 5,000 Texas Water Development Board, Senior Lien State Revolving 1/10 at 100.00 AAA 5,212,350 Fund Revenue Bonds, Series 1999B, 5.250%, 7/15/17 9,145 Texas, General Obligation Bonds, Veterans Housing Assistance 6/12 at 100.00 Aa1 9,504,033 Program Fund II, Series 2002A-1, 5.250%, 12/01/22 (Alternative Minimum Tax) Williamson County, Texas, General Obligation Bonds, Series 2002: 3,500 5.200%, 2/15/21 - FSA Insured 2/12 at 100.00 AAA 3,670,520 3,000 5.250%, 2/15/22 - FSA Insured 2/12 at 100.00 AAA 3,160,080 7,340 5.250%, 2/15/23 - FSA Insured 2/12 at 100.00 AAA 7,731,662 5,000 5.250%, 2/15/25 - FSA Insured 2/12 at 100.00 AAA 5,255,800 ------------------------------------------------------------------------------------------------------------------------------------ 118,310 Total Texas 123,974,819 ------------------------------------------------------------------------------------------------------------------------------------ WASHINGTON - 13.7% (9.1% OF TOTAL INVESTMENTS) 6,600 Energy Northwest, Washington, Electric Revenue Refunding 7/12 at 100.00 AAA 7,001,280 Bonds, Columbia Generating Station - Nuclear Project 2, Series 2002B, 5.350%, 7/01/18 - FSA Insured 7,675 Energy Northwest, Washington, Electric Revenue Refunding 7/12 at 100.00 AAA 8,246,788 Bonds, Nuclear Project 1, Series 2002A, 5.500%, 7/01/15 - MBIA Insured 2,500 Port of Seattle, Washington, Revenue Refunding Bonds, 11/12 at 100.00 AAA 2,697,275 Series 2002D, 5.750%, 11/01/15 - FGIC Insured (Alternative Minimum Tax) 2,200 Snohomish County School District 2, Everett, Washington, 12/13 at 100.00 AAA 2,306,744 General Obligation Bonds, Series 2003B, 5.000%, 6/01/17 - FSA Insured 3,255 Thurston and Pierce Counties School District, Washington, 6/13 at 100.00 Aaa 3,495,447 General Obligation Bonds, Yelm Community Schools, Series 2003, 5.250%, 12/01/16 - FSA Insured Washington State Economic Development Finance Authority, Wastewater Revenue Bonds, LOTT Project, Series 2002: 2,000 5.500%, 6/01/17 - AMBAC Insured 6/12 at 100.00 Aaa 2,149,840 4,325 5.125%, 6/01/22 - AMBAC Insured 6/12 at 100.00 Aaa 4,528,881 10,000 Washington State Healthcare Facilities Authority, Revenue 10/11 at 100.00 Aaa 10,626,100 Bonds, Children's Hospital and Regional Medical Center, Series 2001, 5.125%, 10/01/31 (Pre-refunded 10/01/11) - AMBAC Insured 15,000 Washington State Healthcare Facilities Authority, Revenue 8/13 at 102.00 AAA 15,361,950 Bonds, Harrison Memorial Hospital, Series 1998, 5.000%, 8/15/28 - AMBAC Insured 5,170 Whitman County School District 267, Pullman, Washington, 6/12 at 100.00 Aaa 5,350,175 General Obligation Bonds, Series 2002, 5.000%, 12/01/20 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 58,725 Total Washington 61,764,480 ------------------------------------------------------------------------------------------------------------------------------------ 59 Nuveen Insured Dividend Advantage Municipal Fund (NVG) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ WISCONSIN - 3.0% (2.0% OF TOTAL INVESTMENTS) $ 920 Wisconsin Housing and Economic Development Authority, 3/12 at 100.00 AA $ 939,633 Home Ownership Revenue Bonds, Series 2002E, 5.250%, 9/01/22 (Alternative Minimum Tax) 11,950 Wisconsin, Transportation Revenue Refunding Bonds, 7/12 at 100.00 AAA 12,564,947 Series 2002-1, 5.125%, 7/01/18 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 12,870 Total Wisconsin 13,504,580 ------------------------------------------------------------------------------------------------------------------------------------ $ 645,395 Total Investments (cost $644,759,508) - 150.0% 676,849,487 =============----------------------------------------------------------------------------------------------------------------------- Other Assets Less Liabilities - 1.6% 7,357,074 -------------------------------------------------------------------------------------------------------------------- Preferred Shares, at Liquidation Value - (51.6)% (233,000,000) -------------------------------------------------------------------------------------------------------------------- Net Assets Applicable to Common Shares - 100% $ 451,206,561 ==================================================================================================================== At least 80% of the Fund's net assets (including net assets attributable to Preferred shares) are invested in municipal securities that are either covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance which ensures the timely payment of principal and interest. Up to 20% of the Fund's net assets (including net assets attributable to Preferred shares) may be invested in municipal securities that are (i) either backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities (also ensuring the timely payment of principal and interest), or (ii) rated, at the time of investment, within the four highest grades (Baa or BBB or better by Moody's, S&P or Fitch) or unrated but judged to be of comparable quality by the Adviser. (1) All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted. (2) Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns. (3) Ratings: Using the higher of Standard & Poor's or Moody's rating. Ratings below BBB by Standard & Poor's Group or Baa by Moody's Investor Service, Inc. are considered to be below investment grade. See accompanying notes to financial statements. 60 Nuveen Insured Tax-Free Advantage Municipal Fund (NEA) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ ALABAMA - 8.3% (5.5% OF TOTAL INVESTMENTS) $ 5,655 Colbert County-Northwest Health Care Authority, Alabama, 6/13 at 101.00 Baa3 $ 5,751,531 Revenue Bonds, Helen Keller Hospital, Series 2003, 5.750%, 6/01/27 3,100 Huntsville Healthcare Authority, Alabama, Revenue Bonds, 5/12 at 102.00 AAA 3,325,277 Series 1998A, 5.400%, 6/01/22 - MBIA Insured 6,280 Jefferson County, Alabama, Sewer Revenue Capital 8/12 at 100.00 AAA 6,671,432 Improvement Warrants, Series 2002D, 5.000%, 2/01/32 (Pre-refunded 8/01/12) - FGIC Insured 1,750 Montgomery, Alabama, General Obligation Warrants, 5/12 at 101.00 AAA 1,817,007 Series 2003, 5.000%, 5/01/21 - AMBAC Insured 4,500 Sheffield, Alabama, Electric Revenue Bonds, Series 2003, 7/13 at 100.00 Aaa 4,823,640 5.500%, 7/01/29 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 21,285 Total Alabama 22,388,887 ------------------------------------------------------------------------------------------------------------------------------------ ARIZONA - 3.8% (2.5% OF TOTAL INVESTMENTS) 10,000 Maricopa County Pollution Control Corporation, Arizona, 11/12 at 100.00 AAA 10,241,000 Revenue Bonds, Arizona Public Service Company - Palo Verde Project, Series 2002A, 5.050%, 5/01/29 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ CALIFORNIA - 29.1% (19.3% OF TOTAL INVESTMENTS) 26,300 California State Public Works Board, Lease Revenue Bonds, 12/12 at 100.00 AAA 26,989,058 Department of General Services, Capital East End Project, Series 2002A, 5.000%, 12/01/27 - AMBAC Insured 7,500 California, General Obligation Bonds, Series 2004, 4/14 at 100.00 AAA 7,714,650 5.000%, 4/01/31 - AMBAC Insured 13,500 California, General Obligation Refunding Bonds, Series 2002, 4/12 at 100.00 AAA 14,195,115 5.250%, 4/01/30 - XLCA Insured 2,910 Cathedral City Public Financing Authority, California, 8/12 at 102.00 AAA 3,006,205 Tax Allocation Bonds, Housing Set-Aside, Series 2002D, 5.000%, 8/01/26 - MBIA Insured 2,500 Irvine Public Facilities and Infrastructure Authority, California, 9/06 at 103.00 AAA 2,546,750 Assessment Revenue Bonds, Series 2003C, 5.000%, 9/02/23 - AMBAC Insured 4,000 Montara Sanitation District, California, General Obligation 8/11 at 101.00 AAA 4,121,160 Bonds, Series 2003, 5.000%, 8/01/28 - FGIC Insured Plumas County, California, Certificates of Participation, Capital Improvement Program, Series 2003A: 1,130 5.250%, 6/01/19 - AMBAC Insured 6/13 at 101.00 AAA 1,203,857 1,255 5.250%, 6/01/21 - AMBAC Insured 6/13 at 101.00 AAA 1,333,500 1,210 Redding Joint Powers Financing Authority, California, Lease 3/13 at 100.00 AAA 1,242,888 Revenue Bonds, Capital Improvement Projects, Series 2003A, 5.000%, 3/01/23 - AMBAC Insured 3,750 Sacramento Municipal Utility District, California, Electric 8/13 at 100.00 AAA 3,868,800 Revenue Bonds, Series 2003R, 5.000%, 8/15/28 - MBIA Insured 1,500 San Diego Community College District, California, General 5/13 at 100.00 AAA 1,544,190 Obligation Bonds, Series 2003A, 5.000%, 5/01/28 - FSA Insured 3,000 San Jose Redevelopment Agency, California, Tax Allocation 8/10 at 101.00 AAA 3,063,570 Bonds, Merged Area Redevelopment Project, Series 2002, 5.000%, 8/01/32 - MBIA Insured 1,055 Turlock Irrigation District, California, Certificates of 1/13 at 100.00 AAA 1,081,080 Participation, Series 2003A, 5.000%, 1/01/28 - MBIA Insured 6,300 University of California, Revenue Bonds, Multi-Purpose 5/13 at 100.00 AAA 6,482,511 Projects, Series 2003A, 5.000%, 5/15/33 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 75,910 Total California 78,393,334 ------------------------------------------------------------------------------------------------------------------------------------ COLORADO - 3.8% (2.5% OF TOTAL INVESTMENTS) Bowles Metropolitan District, Colorado, General Obligation Bonds, Series 2003: 4,300 5.500%, 12/01/23 - FSA Insured 12/13 at 100.00 AAA 4,663,178 3,750 5.500%, 12/01/28 - FSA Insured 12/13 at 100.00 AAA 4,046,737 61 Nuveen Insured Tax-Free Advantage Municipal Fund (NEA) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ COLORADO (continued) $ 1,450 Colorado Educational and Cultural Facilities Authority, 8/14 at 100.00 AAA $ 1,532,230 Charter School Revenue Bonds, Peak-to-Peak Charter School, Series 2004, 5.250%, 8/15/24 - XLCA Insured 9,500 Total Colorado 10,242,145 ------------------------------------------------------------------------------------------------------------------------------------ FLORIDA - 1.2% (0.8% OF TOTAL INVESTMENTS) 3,000 Pinellas County Health Facilities Authority, Florida, Revenue 5/13 at 100.00 A1 (4) 3,251,880 Bonds, Baycare Health System, Series 2003, 5.500%, 11/15/27 (Pre-refunded 5/15/13) ------------------------------------------------------------------------------------------------------------------------------------ GEORGIA - 1.5% (1.0% OF TOTAL INVESTMENTS) 3,825 Metropolitan Atlanta Rapid Transit Authority, Georgia, Sales 1/13 at 100.00 AAA 3,923,991 Tax Revenue Bonds, Second Indenture Series 2002, 5.000%, 7/01/32 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ ILLINOIS - 3.7% (2.5% OF TOTAL INVESTMENTS) 905 Cook County School District 100, Berwyn South, Illinois, 12/13 at 100.00 Aaa 980,133 General Obligation Refunding Bonds, Series 2003B, 5.250%, 12/01/21 (Pre-refunded 12/01/13) - FSA Insured Cook County School District 145, Arbor Park, Illinois, General Obligation Bonds, Series 2004: 3,285 5.125%, 12/01/20 - FSA Insured 12/14 at 100.00 Aaa 3,455,426 2,940 5.125%, 12/01/23 - FSA Insured 12/14 at 100.00 Aaa 3,083,942 2,500 Illinois Health Facilities Authority, Revenue Bonds, Lake 7/13 at 100.00 A- 2,548,425 Forest Hospital, Series 2003, 5.250%, 7/01/23 ------------------------------------------------------------------------------------------------------------------------------------ 9,630 Total Illinois 10,067,926 ------------------------------------------------------------------------------------------------------------------------------------ INDIANA - 8.8% (5.8% OF TOTAL INVESTMENTS) 2,500 Evansville, Indiana, Sewerage Works Revenue Refunding 7/13 at 100.00 AAA 2,586,625 Bonds, Series 2003A, 5.000%, 7/01/23 - AMBAC Insured 2,190 Indiana Bond Bank, Advance Purchase Funding Bonds, Common 8/13 at 100.00 AAA 2,270,045 School Fund, Series 2003B, 5.000%, 8/01/19 - MBIA Insured 1,000 Indiana University, Student Fee Revenue Bonds, Series 2003O, 8/13 at 100.00 AAA 1,036,870 5.000%, 8/01/22 - FGIC Insured IPS Multi-School Building Corporation, Indiana, First Mortgage Revenue Bonds, Series 2003: 11,020 5.000%, 7/15/19 - MBIA Insured 7/13 at 100.00 AAA 11,469,065 6,000 5.000%, 7/15/20 - MBIA Insured 7/13 at 100.00 AAA 6,233,220 ------------------------------------------------------------------------------------------------------------------------------------ 22,710 Total Indiana 23,595,825 ------------------------------------------------------------------------------------------------------------------------------------ KANSAS - 2.4% (1.6% OF TOTAL INVESTMENTS) 6,250 Kansas Development Finance Authority, Board of Regents, 4/13 at 102.00 AAA 6,565,938 Revenue Bonds, Scientific Research and Development Facilities Projects, Series 2003C, 5.000%, 10/01/22 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ KENTUCKY - 0.4% (0.2% OF TOTAL INVESTMENTS) 985 Kentucky State Property and Buildings Commission, Revenue 8/13 at 100.00 AAA 1,049,143 Refunding Bonds, Project 77, Series 2003, 5.000%, 8/01/23 (Pre-refunded 8/01/13) - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ LOUISIANA - 2.2% (1.5% OF TOTAL INVESTMENTS) 5,785 New Orleans, Louisiana, General Obligation Refunding Bonds, 12/12 at 100.00 AAA 6,029,127 Series 2002, 5.300%, 12/01/27 - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ MASSACHUSETTS - 5.1% (3.4% OF TOTAL INVESTMENTS) 9,000 Massachusetts Bay Transportation Authority, Senior Sales 7/12 at 100.00 AAA 9,555,930 Tax Revenue Refunding Bonds, Series 2002A, 5.000%, 7/01/27 (Pre-refunded 7/01/12) - FGIC Insured 1,125 Massachusetts Development Finance Authority, Revenue Bonds, 9/13 at 100.00 A1 1,164,926 Middlesex School, Series 2003, 5.125%, 9/01/23 3,000 Massachusetts Turnpike Authority, Metropolitan Highway 1/07 at 102.00 AAA 3,040,080 System Revenue Bonds, Senior Series 1997A, 5.000%, 1/01/37 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 13,125 Total Massachusetts 13,760,936 ------------------------------------------------------------------------------------------------------------------------------------ 62 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ MICHIGAN - 11.6% (7.7% OF TOTAL INVESTMENTS) $ 6,130 Detroit, Michigan, Senior Lien Water Supply System Revenue 7/13 at 100.00 AAA $ 6,352,274 Bonds, Series 2003A, 5.000%, 7/01/23 - MBIA Insured 4,465 Detroit, Michigan, Senior Lien Water Supply System Revenue 7/13 at 100.00 AAA 4,636,367 Refunding Bonds, Series 2003C, 5.000%, 7/01/22 - MBIA Insured 10,800 Michigan Strategic Fund, Limited Obligation Resource Recovery 12/12 at 100.00 AAA 11,197,332 Revenue Refunding Bonds, Detroit Edison Company, Series 2002D, 5.250%, 12/15/32 - XLCA Insured 2,250 Romulus Community Schools, Wayne County, Michigan, 5/11 at 100.00 AA 2,361,195 General Obligation Refunding Bonds, Series 2001, 5.250%, 5/01/25 6,500 Wayne County, Michigan, Limited Tax General Obligation 12/11 at 101.00 AAA 6,674,005 Airport Hotel Revenue Bonds, Detroit Metropolitan Wayne County Airport, Series 2001A, 5.000%, 12/01/30 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 30,145 Total Michigan 31,221,173 ------------------------------------------------------------------------------------------------------------------------------------ MISSOURI - 1.1% (0.7% OF TOTAL INVESTMENTS) Clay County Public School District 53, Liberty, Missouri, General Obligation Bonds, Series 2004: 1,325 5.250%, 3/01/23 - FSA Insured 3/14 at 100.00 AAA 1,409,774 1,500 5.250%, 3/01/24 - FSA Insured 3/14 at 100.00 AAA 1,594,950 ------------------------------------------------------------------------------------------------------------------------------------ 2,825 Total Missouri 3,004,724 ------------------------------------------------------------------------------------------------------------------------------------ NEBRASKA - 1.9% (1.3% OF TOTAL INVESTMENTS) 5,000 Lincoln, Nebraska, Sanitary Sewerage System Revenue 6/13 at 100.00 AAA 5,146,200 Refunding Bonds, Series 2003, 5.000%, 6/15/28 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ NEVADA - 0.9% (0.6% OF TOTAL INVESTMENTS) 2,315 Clark County, Nevada, Subordinate Lien Airport Revenue 7/11 at 100.00 AAA 2,466,401 Bonds, Series 2001B, 5.200%, 7/01/31 (Pre-refunded 7/01/11) - FGIC Insured ------------------------------------------------------------------------------------------------------------------------------------ NEW MEXICO - 0.8% (0.5% OF TOTAL INVESTMENTS) 1,975 New Mexico State University, Revenue Bonds, Series 2004, 4/14 at 100.00 AAA 2,063,579 5.000%, 4/01/19 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ NEW YORK - 10.2% (6.8% OF TOTAL INVESTMENTS) 25,000 Metropolitan Transportation Authority, New York, Transportation 11/12 at 100.00 AAA 25,651,500 Revenue Refunding Bonds, Series 2002F, 5.000%, 11/15/31 - MBIA Insured 1,850 New York State Urban Development Corporation, Service 3/15 at 100.00 AAA 1,924,574 Contract Revenue Bonds, Series 2005B, 5.000%, 3/15/25 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 26,850 Total New York 27,576,074 ------------------------------------------------------------------------------------------------------------------------------------ NORTH CAROLINA - 3.4% (2.2% OF TOTAL INVESTMENTS) 8,700 North Carolina Medical Care Commission, Revenue Bonds, 10/13 at 100.00 AA 9,075,231 Maria Parham Medical Center, Series 2003, 5.375%, 10/01/33 - RAAI Insured ------------------------------------------------------------------------------------------------------------------------------------ OKLAHOMA - 0.4% (0.2% OF TOTAL INVESTMENTS) 1,000 Oklahoma Capitol Improvement Authority, State Facilities 7/15 at 100.00 AAA 1,042,150 Revenue Bonds, Series 2005F, 5.000%, 7/01/24 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ OREGON - 3.6% (2.4% OF TOTAL INVESTMENTS) 9,350 Oregon Health Sciences University, Revenue Bonds, 1/13 at 100.00 AAA 9,602,824 Series 2002A, 5.000%, 7/01/32 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA - 8.8% (5.8% OF TOTAL INVESTMENTS) 3,000 Lehigh County General Purpose Authority, Pennsylvania, 8/13 at 100.00 Baa1 3,079,830 Hospital Revenue Bonds, St. Luke's Hospital of Bethlehem, Series 2003, 5.375%, 8/15/33 2,000 Philadelphia Gas Works, Pennsylvania, Revenue Bonds, 8/13 at 100.00 AAA 2,046,900 General Ordinance, Fourth Series 1998, 5.000%, 8/01/32 - FSA Insured 925 Philadelphia, Pennsylvania, Water and Wastewater Revenue 8/07 at 102.00 AAA 942,640 Bonds, Series 1997A, 5.125%, 8/01/27 - AMBAC Insured (ETM) 4,075 Philadelphia, Pennsylvania, Water and Wastewater Revenue 8/07 at 102.00 AAA 4,193,420 Bonds, Series 1997A, 5.125%, 8/01/27 - AMBAC Insured 63 Nuveen Insured Tax-Free Advantage Municipal Fund (NEA) (continued) Portfolio of INVESTMENTS April 30, 2006 (Unaudited) PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ PENNSYLVANIA (continued) $ 13,000 State Public School Building Authority, Pennsylvania, Lease 6/13 at 100.00 AAA $ 13,307,190 Revenue Bonds, Philadelphia School District, Series 2003, 5.000%, 6/01/33 - FSA Insured ------------------------------------------------------------------------------------------------------------------------------------ 23,000 Total Pennsylvania 23,569,980 ------------------------------------------------------------------------------------------------------------------------------------ SOUTH CAROLINA - 7.4% (4.9% OF TOTAL INVESTMENTS) 5,000 Florence County, South Carolina, Hospital Revenue Bonds, 11/14 at 100.00 AAA 5,302,550 McLeod Regional Medical Center, Series 2004A, 5.250%, 11/01/23 - FSA Insured Greenville County School District, South Carolina, Installment Purchase Revenue Bonds, Series 2003: 3,000 5.000%, 12/01/22 12/13 at 100.00 AA- 3,077,970 1,785 5.000%, 12/01/23 12/13 at 100.00 AA- 1,826,787 1,365 Myrtle Beach, South Carolina, Water and Sewerage System 3/13 at 100.00 AAA 1,463,212 Revenue Refunding Bonds, Series 2003, 5.375%, 3/01/19 - FGIC Insured 8,000 South Carolina Transportation Infrastructure Bank, Revenue 10/12 at 100.00 Aaa 8,187,120 Bonds, Series 2002A, 5.000%, 10/01/33 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 19,150 Total South Carolina 19,857,639 ------------------------------------------------------------------------------------------------------------------------------------ TEXAS - 13.0% (8.6% OF TOTAL INVESTMENTS) 7,975 Fort Bend Independent School District, Fort Bend County, 8/10 at 100.00 AAA 8,190,165 Texas, General Obligation Bonds, Series 2000, 5.000%, 8/15/25 12,500 Grand Prairie Independent School District, Dallas County, 2/13 at 100.00 AAA 12,863,750 Texas, General Obligation Bonds, Series 2003, 5.125%, 2/15/31 - FSA Insured 2,000 Houston, Texas, First Lien Combined Utility System Revenue 5/14 at 100.00 AAA 2,110,640 Bonds, Series 2004A, 5.250%, 5/15/25 - MBIA Insured 5,515 Houston, Texas, General Obligation Refunding Bonds, 3/12 at 100.00 AAA 5,816,560 Series 2002, 5.250%, 3/01/20 - MBIA Insured 5,850 Katy Independent School District, Harris, Fort Bend and Waller 2/12 at 100.00 AAA 6,123,663 Counties, Texas, General Obligation Bonds, Series 2002A, 5.125%, 2/15/18 ------------------------------------------------------------------------------------------------------------------------------------ 33,840 Total Texas 35,104,778 ------------------------------------------------------------------------------------------------------------------------------------ VIRGINIA - 0.6% (0.4% OF TOTAL INVESTMENTS) 1,500 Hampton, Virginia, Revenue Bonds, Convention Center Project, 1/13 at 100.00 AAA 1,552,740 Series 2002, 5.125%, 1/15/28 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ WASHINGTON - 9.2% (6.1% OF TOTAL INVESTMENTS) 4,945 Broadway Office Properties, King County, Washington, Lease 12/12 at 100.00 AAA 5,051,960 Revenue Bonds, Washington Project, Series 2002, 5.000%, 12/01/31 - MBIA Insured 5,250 Chelan County Public Utility District 1, Washington, Hydro 7/12 at 100.00 AAA 5,390,700 Consolidated System Revenue Bonds, Series 2002C, 5.125%, 7/01/33 - AMBAC Insured 2,135 Kitsap County Consolidated Housing Authority, Washington, 7/13 at 100.00 Aaa 2,196,403 Revenue Bonds, Bremerton Government Center, Series 2003, 5.000%, 7/01/23 - MBIA Insured 1,935 Pierce County School District 343, Dieringer, Washington, 6/13 at 100.00 Aaa 2,055,376 General Obligation Refunding Bonds, Series 2003, 5.250%, 12/01/17 - FGIC Insured 9,670 Washington, General Obligation Bonds, Series 2003D, 6/13 at 100.00 AAA 10,031,755 5.000%, 12/01/21 - MBIA Insured ------------------------------------------------------------------------------------------------------------------------------------ 23,935 Total Washington 24,726,194 ------------------------------------------------------------------------------------------------------------------------------------ WEST VIRGINIA - 1.2% (0.8% OF TOTAL INVESTMENTS) 3,000 West Virginia State Building Commission, Lease Revenue No Opt. Call AAA 3,291,420 Refunding Bonds, Regional Jail and Corrections Facility, Series 1998A, 5.375%, 7/01/21 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ WISCONSIN - 6.7% (4.4% OF TOTAL INVESTMENTS) 1,190 Sun Prairie Area School District, Dane County, Wisconsin, 3/14 at 100.00 Aaa 1,257,616 General Obligation Bonds, Series 2004C, 5.250%, 3/01/24 - FSA Insured 4,605 Wisconsin Health and Educational Facilities Authority, 9/13 at 100.00 A- 4,854,038 Revenue Bonds, Franciscan Sisters of Christian Charity Healthcare Ministry, Series 2003A, 5.875%, 9/01/33 64 PRINCIPAL OPTIONAL CALL AMOUNT (000) DESCRIPTION (1) PROVISIONS (2) RATINGS (3) VALUE ------------------------------------------------------------------------------------------------------------------------------------ WISCONSIN (continued) $ 3,000 Wisconsin Health and Educational Facilities Authority, Revenue No Opt. Call AAA $ 3,366,930 Bonds, Meriter Hospital Inc., Series 1992A, 6.000%, 12/01/22 - FGIC Insured 3,600 Wisconsin Health and Educational Facilities Authority, Revenue 8/13 at 100.00 A 3,630,240 Bonds, Wheaton Franciscan Services Inc., Series 2003A, 5.125%, 8/15/33 4,750 Wisconsin Health and Educational Facilities Authority, Revenue 8/08 at 102.00 AAA 4,907,795 Refunding Bonds, Wausau Hospital Inc., Series 1998A, 5.125%, 8/15/20 - AMBAC Insured ------------------------------------------------------------------------------------------------------------------------------------ 17,145 Total Wisconsin 18,016,619 ------------------------------------------------------------------------------------------------------------------------------------ $ 391,735 Total Investments (cost $392,622,303) - 151.1% 406,827,858 =============----------------------------------------------------------------------------------------------------------------------- Other Assets Less Liabilities - 2.4% 6,496,513 -------------------------------------------------------------------------------------------------------------------- Preferred Shares, at Liquidation Value - (53.5)% (144,000,000) -------------------------------------------------------------------------------------------------------------------- Net Assets Applicable to Common Shares - 100% $ 269,324,371 ==================================================================================================================== FORWARD SWAPS OUTSTANDING AT APRIL 30, 2006: FIXED RATE FLOATING RATE PAID FIXED RATE RECEIVED FLOATING RATE UNREALIZED NOTIONAL BY THE FUND PAYMENT BY THE FUND PAYMENT EFFECTIVE TERMINATION APPRECIATION COUNTERPARTY AMOUNT (ANNUALIZED) FREQUENCY BASED ON FREQUENCY DATE (5) DATE (DEPRECIATION) ------------------------------------------------------------------------------------------------------------------------------------ Goldman Sachs $10,200,000 4.013% Quarterly BMA Quarterly 9/14/06 9/14/26 $ 471,968 Merrill Lynch 19,000,000 4.021 Quarterly BMA Quarterly 9/21/06 9/21/26 863,679 ------------------------------------------------------------------------------------------------------------------------------------ $1,335,647 ==================================================================================================================================== BMA - The daily arithmetic average of the weekly BMA (Bond Market Association) Municipal Swap Index. At least 80% of the Fund's net assets (including net assets attributable to Preferred shares) are invested in municipal securities that are either covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance which ensures the timely payment of principal and interest. Up to 20% of the Fund's net assets (including net assets attributable to Preferred shares) may be invested in municipal securities that are (i) either backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities (also ensuring the timely payment of principal and interest), or (ii) rated, at the time of investment, within the four highest grades (Baa or BBB or better by Moody's, S&P or Fitch) or unrated but judged to be of comparable quality by the Adviser. (1) All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted. (2) Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns. (3) Ratings: Using the higher of Standard & Poor's or Moody's rating. Ratings below BBB by Standard & Poor's Group or Baa by Moody's Investor Service, Inc. are considered to be below investment grade. (4) Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities which ensure the timely payment of principal and interest. Such investments are normally considered to be equivalent to AAA rated securities. (5) Effective date represents the date on which both the Fund and counterparty commence interest payment accruals on each forward swap contract. (ETM) Escrowed to maturity. See accompanying notes to financial statements. 65 Statement of ASSETS AND LIABILITIES April 30, 2006 (Unaudited) INSURED INSURED INSURED INSURED INSURED PREMIER PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INSURED INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) ------------------------------------------------------------------------------------------------------------------------------------ ASSETS Investments, at value $882,450,905 $1,905,831,610 $446,137,509 $773,963,705 $676,849,487 $406,827,858 (cost $842,621,523, $1,813,064,169, $425,112,914, $750,969,130, $644,759,508 and $392,622,303, respectively) Cash -- -- -- 2,438,288 -- -- Receivables: Interest 12,394,651 29,451,560 7,309,705 13,512,174 9,636,928 6,367,836 Investments sold 1,555,000 9,441,610 165,000 1,027,569 -- -- Unrealized appreciation on forward swaps -- -- -- -- -- 1,335,647 Other assets 62,871 167,341 34,734 71,661 21,536 27,192 ------------------------------------------------------------------------------------------------------------------------------------ Total assets 896,463,427 1,944,892,121 453,646,948 791,013,397 686,507,951 414,558,533 ------------------------------------------------------------------------------------------------------------------------------------ LIABILITIES Cash overdraft 2,176,329 12,771,507 986,912 -- 1,911,296 1,008,479 Payable for investments purchased -- 18,591,784 -- 6,107,549 -- -- Accrued expenses: Management fees 451,294 946,165 232,465 397,198 178,661 103,857 Other 177,893 372,196 96,229 263,266 103,567 61,861 Preferred share dividends payable 159,511 309,592 81,094 134,621 107,866 59,965 ------------------------------------------------------------------------------------------------------------------------------------ Total liabilities 2,965,027 32,991,244 1,396,700 6,902,634 2,301,390 1,234,162 ------------------------------------------------------------------------------------------------------------------------------------ Preferred shares, at liquidation value 318,000,000 680,000,000 161,000,000 268,900,000 233,000,000 144,000,000 ------------------------------------------------------------------------------------------------------------------------------------ Net assets applicable to Common shares $575,498,400 $1,231,900,877 $291,250,248 $515,210,763 $451,206,561 $269,324,371 ==================================================================================================================================== Common shares outstanding 38,295,278 81,138,036 19,419,608 37,353,512 29,807,822 18,515,282 ==================================================================================================================================== Net asset value per Common share outstanding (net assets applicable to Common shares, divided by Common shares outstanding) $ 15.03 $ 15.18 $ 15.00 $ 13.79 $ 15.14 $ 14.55 ==================================================================================================================================== NET ASSETS APPLICABLE TO COMMON SHARES CONSIST OF: ------------------------------------------------------------------------------------------------------------------------------------ Common shares, $.01 par value per share $ 382,953 $ 811,380 $ 194,196 $ 373,535 $ 298,078 $ 185,153 Paid-in surplus 534,537,618 1,128,874,275 269,467,179 491,941,518 423,484,088 261,528,621 Undistributed (Over-distribution of) net investment income 2,351,445 8,129,017 587,124 920,244 632,107 (93,766) Accumulated net realized gain (loss) from investments and derivative transactions (1,602,998) 1,318,764 (22,846) (1,019,109) (5,297,691) (7,836,839) Net unrealized appreciation (depreciation) of investments and derivative transactions 39,829,382 92,767,441 21,024,595 22,994,575 32,089,979 15,541,202 ------------------------------------------------------------------------------------------------------------------------------------ Net assets applicable to Common shares $575,498,400 $1,231,900,877 $291,250,248 $515,210,763 $451,206,561 $269,324,371 ==================================================================================================================================== Authorized shares: Common 200,000,000 200,000,000 200,000,000 Unlimited Unlimited Unlimited Preferred 1,000,000 1,000,000 1,000,000 Unlimited Unlimited Unlimited ==================================================================================================================================== See accompanying notes to financial statements. 66 Statement of OPERATIONS Six Months Ended April 30, 2006 (Unaudited) INSURED INSURED INSURED INSURED INSURED PREMIER PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INSURED INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) ------------------------------------------------------------------------------------------------------------------------------------ INVESTMENT INCOME $22,419,798 $ 47,196,492 $11,338,774 $19,016,969 $16,585,377 $ 9,902,523 ------------------------------------------------------------------------------------------------------------------------------------ EXPENSES Management fees 2,747,291 5,764,291 1,418,486 2,415,848 2,111,949 1,289,445 Preferred shares - auction fees 394,614 843,895 199,727 333,685 289,215 178,743 Preferred shares - dividend disbursing agent fees 24,795 34,712 14,877 24,795 14,877 9,918 Shareholders' servicing agent fees and expenses 48,397 80,656 19,126 28,164 4,851 3,072 Custodian's fees and expenses 113,098 225,125 52,128 85,422 76,814 45,277 Directors'/Trustees' fees and expenses 9,251 18,529 4,177 7,676 6,850 4,165 Professional fees 20,483 37,825 13,044 14,732 17,012 11,730 Shareholders' reports - printing and mailing expenses 43,944 85,695 23,730 40,508 33,090 20,138 Stock exchange listing fees 7,640 15,030 4,998 6,927 1,258 782 Investor relations expense 28,845 57,647 15,826 25,407 22,436 14,366 Portfolio insurance expense -- 14,435 -- -- -- -- Other expenses 30,693 39,255 19,552 19,123 15,382 11,213 ------------------------------------------------------------------------------------------------------------------------------------ Total expenses before custodian fee credit and expense reimbursement 3,469,051 7,217,095 1,785,671 3,002,287 2,593,734 1,588,849 Custodian fee credit (1,737) (7,737) (4,069) (4,391) (2,724) (2,049) Expense reimbursement -- -- -- -- (1,025,811) (659,608) ------------------------------------------------------------------------------------------------------------------------------------ Net expenses 3,467,314 7,209,358 1,781,602 2,997,896 1,565,199 927,192 ------------------------------------------------------------------------------------------------------------------------------------ Net investment income 18,952,484 39,987,134 9,557,172 16,019,073 15,020,178 8,975,331 ------------------------------------------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) Net realized gain (loss) from investments (1,628,211) 1,278,248 (21,383) 256,553 (1,598,514) 22,017 Net realized gain (loss) from forward swaps -- -- -- -- -- 957,040 Net increase from payments by the Adviser for losses realized on the disposal of investments purchased in violation of investment restrictions 27,762 42,338 -- -- -- -- Change in net unrealized appreciation (depreciation) of investments (4,256,445) (8,183,328) (3,658,253) (4,345,364) (195,251) (1,278,538) Change in net unrealized appreciation (depreciation) of forward swaps -- -- -- -- -- (94,360) ------------------------------------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) (5,856,894) (6,862,742) (3,679,636) (4,088,811) (1,793,765) (393,841) ------------------------------------------------------------------------------------------------------------------------------------ DISTRIBUTIONS TO PREFERRED SHAREHOLDERS From net investment income (4,197,643) (8,206,733) (2,100,438) (3,873,137) (3,428,904) (1,983,357) From accumulated net realized gains (565,042) (2,314,744) (363,000) -- -- -- ------------------------------------------------------------------------------------------------------------------------------------ Decrease in net assets applicable to Common shares from distributions to Preferred shareholders (4,762,685) (10,521,477) (2,463,438) (3,873,137) (3,428,904) (1,983,357) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares from operations $ 8,332,905 $ 22,602,915 $ 3,414,098 $ 8,057,125 $ 9,797,509 $ 6,598,133 ==================================================================================================================================== See accompanying notes to financial statements. 67 Statement of CHANGES IN NET ASSETS (Unaudited) INSURED QUALITY (NQI) INSURED OPPORTUNITY (NIO) ----------------------------- -------------------------------- SIX MONTHS YEAR SIX MONTHS YEAR ENDED ENDED ENDED ENDED 4/30/06 10/31/05 4/30/06 10/31/05 ------------------------------------------------------------------------------------------------------------------------------------ OPERATIONS Net investment income $ 18,952,484 $ 39,418,327 $ 39,987,134 $ 81,917,886 Net realized gain (loss) from investments (1,628,211) 3,528,017 1,278,248 14,031,164 Net realized gain (loss) from forward swaps -- -- -- -- Net increase from payments by the Adviser for losses realized on the disposal of investments purchased in violation of investment restrictions 27,762 -- 42,338 -- Change in net unrealized appreciation (depreciation) of investments (4,256,445) (18,408,001) (8,183,328) (53,551,554) Change in net unrealized appreciation (depreciation) of forward swaps -- -- -- -- Distributions to Preferred Shareholders: From net investment income (4,197,643) (6,065,197) (8,206,733) (13,081,165) From accumulated net realized gains (565,042) (159,181) (2,314,744) (217,348) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares from operations 8,332,905 18,313,965 22,602,915 29,098,983 ------------------------------------------------------------------------------------------------------------------------------------ DISTRIBUTIONS TO COMMON SHAREHOLDERS From net investment income (16,062,050) (36,927,040) (34,029,303) (74,809,273) From accumulated net realized gains (2,966,866) (2,090,966) (11,310,642) (2,636,993) ------------------------------------------------------------------------------------------------------------------------------------ Decrease in net assets applicable to Common shares from distributions to Common shareholders (19,028,916) (39,018,006) (45,339,945) (77,446,266) ------------------------------------------------------------------------------------------------------------------------------------ CAPITAL SHARE TRANSACTIONS Net proceeds from Common shares issued to shareholders due to reinvestment of distributions 417,198 1,453,639 -- -- ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares from capital share transactions 417,198 1,453,639 -- -- ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares (10,278,813) (19,250,402) (22,737,030) (48,347,283) Net assets applicable to Common shares at the beginning of period 585,777,213 605,027,615 1,254,637,907 1,302,985,190 ------------------------------------------------------------------------------------------------------------------------------------ Net assets applicable to Common shares at the end of period $575,498,400 $585,777,213 $1,231,900,877 $1,254,637,907 ==================================================================================================================================== Undistributed (Over-distribution of) net investment income at the end of period $ 2,351,445 $ 3,658,654 $ 8,129,017 $ 10,377,919 ==================================================================================================================================== See accompanying notes to financial statements. 68 PREMIER INSURED INSURED PREMIUM INCOME (NIF) INCOME 2 (NPX) ----------------------------- ----------------------------- SIX MONTHS YEAR SIX MONTHS YEAR ENDED ENDED ENDED ENDED 4/30/06 10/31/05 4/30/06 10/31/05 ------------------------------------------------------------------------------------------------------------------------------------ OPERATIONS Net investment income $ 9,557,172 $ 19,566,875 $ 16,019,073 $ 33,147,615 Net realized gain (loss) from investments (21,383) 2,211,037 256,553 10,740,879 Net realized gain (loss) from forward swaps -- -- -- -- Net increase from payments by the Adviser for losses realized on the disposal of investments purchased in violation of investment restrictions -- -- -- -- Change in net unrealized appreciation (depreciation) of investments (3,658,253) (12,070,538) (4,345,364) (26,834,953) Change in net unrealized appreciation (depreciation) of forward swaps -- -- -- -- Distributions to Preferred Shareholders: From net investment income (2,100,438) (3,104,665) (3,873,137) (5,295,715) From accumulated net realized gains (363,000) (127,563) -- -- ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares from operations 3,414,098 6,475,146 8,057,125 11,757,826 ------------------------------------------------------------------------------------------------------------------------------------ DISTRIBUTIONS TO COMMON SHAREHOLDERS From net investment income (7,932,914) (17,999,191) (13,353,880) (30,947,388) From accumulated net realized gains (1,854,573) (1,655,759) -- -- ------------------------------------------------------------------------------------------------------------------------------------ Decrease in net assets applicable to Common shares from distributions to Common shareholders (9,787,487) (19,654,950) (13,353,880) (30,947,388) ------------------------------------------------------------------------------------------------------------------------------------ CAPITAL SHARE TRANSACTIONS Net proceeds from Common shares issued to shareholders due to reinvestment of distributions -- 136,954 -- -- ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares from capital share transactions -- 136,954 -- -- ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares (6,373,389) (13,042,850) (5,296,755) (19,189,562) Net assets applicable to Common shares at the beginning of period 297,623,637 310,666,487 520,507,518 539,697,080 ------------------------------------------------------------------------------------------------------------------------------------ Net assets applicable to Common shares at the end of period $291,250,248 $297,623,637 $515,210,763 $520,507,518 ==================================================================================================================================== Undistributed (Over-distribution of) net investment income at the end of period $ 587,124 $ 1,063,304 $ 920,244 $ 2,128,188 ==================================================================================================================================== See accompanying notes to financial statements. 69 Statement of CHANGES IN NET ASSETS (Unaudited) (continued) INSURED DIVIDEND INSURED TAX-FREE ADVANTAGE (NVG) ADVANTAGE (NEA) ------------------------------ ---------------------------- SIX MONTHS YEAR SIX MONTHS YEAR ENDED ENDED ENDED ENDED 4/30/06 10/31/05 4/30/06 10/31/05 ------------------------------------------------------------------------------------------------------------------------------------ OPERATIONS Net investment income $ 15,020,178 $ 29,839,906 $ 8,975,331 $ 17,988,913 Net realized gain (loss) from investments (1,598,514) (174,429) 22,017 299,519 Net realized gain (loss) from forward swaps -- (3,525,412) 957,040 (9,115,854) Net increase from payments by the Adviser for losses realized on the disposal of investments purchased in violation of investment restrictions -- -- -- -- Change in net unrealized appreciation (depreciation) of investments (195,251) (10,512,717) (1,278,538) (2,445,575) Change in net unrealized appreciation (depreciation) of forward swaps -- 2,750,245 (94,360) 7,736,635 Distributions to Preferred Shareholders: From net investment income (3,428,904) (4,486,974) (1,983,357) (2,741,233) From accumulated net realized gains -- (278,326) -- (14,037) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares from operations 9,797,509 13,612,293 6,598,133 11,708,368 ------------------------------------------------------------------------------------------------------------------------------------ DISTRIBUTIONS TO COMMON SHAREHOLDERS From net investment income (12,608,708) (26,409,732) (6,887,683) (15,062,183) From accumulated net realized gains -- (3,573,972) -- (179,616) ------------------------------------------------------------------------------------------------------------------------------------ Decrease in net assets applicable to Common shares from distributions to Common shareholders (12,608,708) (29,983,704) (6,887,683) (15,241,799) ------------------------------------------------------------------------------------------------------------------------------------ CAPITAL SHARE TRANSACTIONS Net proceeds from Common shares issued to shareholders due to reinvestment of distributions -- -- -- 35,393 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares from capital share transactions -- -- -- 35,393 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets applicable to Common shares (2,811,199) (16,371,411) (289,550) (3,498,038) Net assets applicable to Common shares at the beginning of period 454,017,760 470,389,171 269,613,921 273,111,959 ------------------------------------------------------------------------------------------------------------------------------------ Net assets applicable to Common shares at the end of period $451,206,561 $454,017,760 $269,324,371 $269,613,921 ==================================================================================================================================== Undistributed (Over-distribution of) net investment income at the end of period $ 632,107 $ 1,649,541 $ (93,766) $ (198,057) ==================================================================================================================================== See accompanying notes to financial statements. 70 Notes to FINANCIAL STATEMENTS (Unaudited) 1. GENERAL INFORMATION AND SIGNIFICANT ACCOUNTING POLICIES The funds (the "Funds") covered in this report and their corresponding Common share stock exchange symbols are Nuveen Insured Quality Municipal Fund, Inc. (NQI), Nuveen Insured Municipal Opportunity Fund, Inc. (NIO), Nuveen Premier Insured Municipal Income Fund, Inc. (NIF), Nuveen Insured Premium Income Municipal Fund 2 (NPX), Nuveen Insured Dividend Advantage Municipal Fund (NVG) and Nuveen Insured Tax-Free Advantage Municipal Fund (NEA). Common shares of Insured Quality (NQI), Insured Opportunity (NIO), Premier Insured Income (NIF) and Insured Premium Income 2 (NPX) are traded on the New York Stock Exchange while Common shares of Insured Dividend Advantage (NVG) and Insured Tax-Free Advantage (NEA) are traded on the American Stock Exchange. The Funds are registered under the Investment Company Act of 1940, as amended, as closed-end, diversified management investment companies. Each Fund seeks to provide current income exempt from regular federal income tax, and in the case of Insured Tax-Free Advantage (NEA) the alternative minimum tax applicable to individuals, by investing primarily in a diversified portfolio of municipal obligations issued by state and local government authorities or certain U.S. territories. The following is a summary of significant accounting policies followed by the Funds in the preparation of their financial statements in accordance with U.S. generally accepted accounting principles. Investment Valuation The prices of municipal bonds in each Fund's investment portfolio are provided by a pricing service approved by the Fund's Board of Directors/Trustees. When market price quotes are not readily available (which is usually the case for municipal securities), the pricing service establishes fair market value based on yields or prices of municipal bonds of comparable quality, type of issue, coupon, maturity and rating, indications of value from securities dealers, evaluations of anticipated cash flows or collateral and general market conditions. Prices of derivative investments are also provided by an independent pricing service approved by each Fund's Board of Directors/Trustees. If the pricing service is unable to supply a price for a municipal bond or derivative investment, each Fund may use a market price or fair market value quote provided by a major broker/dealer in such investments. If it is determined that the market price or fair market value for an investment are unavailable or inappropriate, the Board of Directors/Trustees of the Funds, or its designee, may establish a fair value for the investment. Temporary investments in securities that have variable rate and demand features qualifying them as short-term securities are valued at amortized cost, which approximates market value. Investment Transactions Investment transactions are recorded on a trade date basis. Realized gains and losses from transactions are determined on the specific identification method. Investments purchased on a when-issued or delayed delivery basis may have extended settlement periods. Any investments so purchased are subject to market fluctuation during this period. The Funds have instructed the custodian to segregate assets with a current value at least equal to the amount of the when-issued/delayed delivery purchase commitments. At April 30, 2006, Insured Opportunity (NIO) and Insured Premium Income 2 (NPX) had outstanding when-issued/delayed delivery purchase commitments of $10,748,176 and $867,927, respectively. There were no such outstanding purchase commitments in any of the other Funds. Investment Income Interest income, which includes the amortization of premiums and accretion of discounts for financial reporting purposes, is recorded on an accrual basis. Investment income also includes paydown gains and losses, if any. Federal Income Taxes Each Fund is a separate taxpayer for federal income tax purposes. Each Fund intends to distribute substantially all net investment income and net capital gains to shareholders and to otherwise comply with the requirements of Subchapter M of the Internal Revenue Code applicable to regulated investment companies. Therefore, no federal income tax provision is required. Furthermore, each Fund intends to satisfy conditions which will enable interest from municipal securities, which is exempt from regular federal income tax, and in the case of Insured Tax-Free Advantage (NEA) the alternative minimum tax applicable to individuals, to retain such tax-exempt status when distributed to shareholders of the Funds. Net realized capital gains and ordinary income distributions paid by the Funds are subject to federal taxation. Dividends and Distributions to Common Shareholders Dividends from tax-exempt net investment income are declared monthly. Net realized capital gains and/or market discount from investment transactions, if any, are distributed to shareholders not less frequently than annually. Furthermore, capital gains are distributed only to the extent they exceed available capital loss carryforwards. 71 Notes to FINANCIAL STATEMENTS (Unaudited) (continued) Distributions to Common shareholders of tax-exempt net investment income, net realized capital gains and/or market discount, if any, are recorded on the ex-dividend date. The amount and timing of distributions are determined in accordance with federal income tax regulations, which may differ from U.S. generally accepted accounting principles. Preferred Shares The Funds have issued and outstanding Preferred shares, $25,000 stated value per share, as a means of effecting financial leverage. Each Fund's Preferred shares are issued in more than one Series. The dividend rate paid by the Funds on each Series is determined every seven days, pursuant to a dutch auction process overseen by the auction agent, and is payable at the end of each rate period. The number of Preferred shares outstanding, by Series and in total, for each Fund is as follows: PREMIER INSURED INSURED INSURED INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) --------------------------------------------------------------------------------------------------------- Number of shares: Series M 2,600 4,000 -- 2,080 3,160 -- Series T 2,600 4,000 -- 2,200 3,080 2,880 Series W 2,600 4,000 840 2,080 -- 2,880 Series W2 -- 3,200 -- -- -- -- Series TH 2,320 4,000 2,800 2,200 3,080 -- Series TH2 -- 4,000 -- -- -- -- Series F 2,600 4,000 2,800 2,196 -- -- --------------------------------------------------------------------------------------------------------- Total 12,720 27,200 6,440 10,756 9,320 5,760 ========================================================================================================= Insurance Insured Quality (NQI), Insured Opportunity (NIO), Premier Insured Income (NIF) and Insured Premium Income 2 (NPX) invest only in municipal securities which are either covered by insurance or are backed by an escrow or trust account containing sufficient U.S. Government or U.S. Government agency securities, both of which ensure the timely payment of principal and interest. Insured Dividend Advantage (NVG) and Insured Tax-Free Advantage (NEA) invest at least 80% of their net assets (including net assets attributable to Preferred shares) in municipal securities that are covered by insurance. Each Fund may also invest up to 20% of its net assets (including net assets attributable to Preferred shares) in municipal securities which are either (i) backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, or (ii) rated, at the time of investment, within the four highest grades (Baa or BBB or better by Moody's, S&P or Fitch) or unrated but judged to be of comparable quality by the Adviser. Each insured municipal security is covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance. Such insurance does not guarantee the market value of the municipal securities or the value of the Funds' Common shares. Original Issue Insurance and Secondary Market Insurance remain in effect as long as the municipal securities covered thereby remain outstanding and the insurer remains in business, regardless of whether the Funds ultimately dispose of such municipal securities. Consequently, the market value of the municipal securities covered by Original Issue Insurance or Secondary Market Insurance may reflect value attributable to the insurance. Portfolio Insurance, in contrast, is effective only while the municipal securities are held by the Funds. Accordingly, neither the prices used in determining the market value of the underlying municipal securities nor the Common share net asset value of the Funds include value, if any, attributable to the Portfolio Insurance. Each policy of the Portfolio Insurance does, however, give the Funds the right to obtain permanent insurance with respect to the municipal security covered by the Portfolio Insurance policy at the time of its sale. Forward Swap Transactions The Funds are authorized to invest in certain derivative financial instruments. The Funds' use of forward interest rate swap transactions is intended to mitigate the negative impact that an increase in long-term interest rates could have on Common share net asset value. Forward interest rate swap transactions involve each Fund's agreement with the counterparty to pay, in the future, a fixed rate payment in exchange for the counterparty paying the Fund a variable rate payment, the accruals for which would begin at a specified date in the future (the "effective date"). The amount of the payment obligation is based on the notional amount of the forward 72 swap contract, and would increase or decrease in value based primarily on the extent to which long-term interest rates for bonds having a maturity of the swaps' termination date were to increase or decrease. The Funds may close out a contract prior to the effective date, at which point a realized gain or loss would be recognized. When a forward swap is terminated, it ordinarily does not involve the delivery of securities or other underlying assets or principal, but rather is settled in cash on a net basis. Each Fund intends, but is not obligated to, terminate its forward swaps before the effective date. Accordingly, the risk of loss with respect to the swap counterparty on such transactions is limited to the credit risk associated with a counterparty failing to honor its commitment to pay any realized gain to the Fund upon termination. To minimize such credit risk, all counterparties are required to pledge collateral daily (based on the daily valuation of each swap) on behalf of each Fund with a value approximately equal to the amount of any unrealized gain above a pre-determined threshold. Reciprocally, when any of the Funds have an unrealized loss on a swap contract, the Funds have instructed the custodian to pledge assets of the Funds as collateral with a value approximately equal to the amount of the unrealized loss above a pre-determined threshold. Collateral pledges are monitored and subsequently adjusted if and when the swap valuations fluctuate, either up or down, by at least the predetermined threshold amount. Custodian Fee Credit Each Fund has an arrangement with the custodian bank whereby certain custodian fees and expenses are reduced by credits earned on each Fund's cash on deposit with the bank. Such deposit arrangements are an alternative to overnight investments. Indemnifications Under the Funds' organizational documents, their Officers and Directors/Trustees are indemnified against certain liabilities arising out of the performance of their duties to the Funds. In addition, in the normal course of business, the Funds enter into contracts that provide general indemnifications to other parties. The Funds' maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Funds that have not yet occurred. However, the Funds have not had prior claims or losses pursuant to these contracts and expect the risk of loss to be remote. Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets applicable to Common shares from operations during the reporting period. Actual results may differ from those estimates. 2. FUND SHARES Transactions in Common shares were as follows: INSURED INSURED PREMIER INSURED QUALITY (NQI) OPPORTUNITY (NIO) INCOME (NIF) ----------------------- ------------------------ ----------------------- SIX MONTHS YEAR SIX MONTHS YEAR SIX MONTHS YEAR ENDED ENDED ENDED ENDED ENDED ENDED 4/30/06 10/31/05 4/30/06 10/31/05 4/30/06 10/31/05 ------------------------------------------------------------------------------------------------------------------------- Common shares issued to shareholders due to reinvestment of distributions 27,000 91,214 -- -- -- 8,559 ========================================================================================================================= INSURED INSURED INSURED TAX-FREE PREMIUM INCOME 2 (NPX) DIVIDEND ADVANTAGE (NVG) ADVANTAGE (NEA) ----------------------- ------------------------ ----------------------- SIX MONTHS YEAR SIX MONTHS YEAR SIX MONTHS YEAR ENDED ENDED ENDED ENDED ENDED ENDED 4/30/06 10/31/05 4/30/06 10/31/05 4/30/06 10/31/05 ------------------------------------------------------------------------------------------------------------------------- Common shares issued to shareholders due to reinvestment of distributions -- -- -- -- -- 2,359 ========================================================================================================================= 3. INVESTMENT TRANSACTIONS Purchases and sales (including maturities but excluding short-term investments and derivative transactions) during the six months ended April 30, 2006, were as follows: PREMIER INSURED INSURED INSURED INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) ---------------------------------------------------------------------------------------------------------- Purchases $47,559,949 $145,877,371 $27,605,251 $34,619,855 $60,915,651 $2,957,511 Sales and maturities 46,702,161 146,909,367 29,825,722 35,309,051 60,325,426 361,226 ========================================================================================================== 73 Notes to FINANCIAL STATEMENTS (Unaudited) (continued) 4. INCOME TAX INFORMATION The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to the treatment of paydown gains and losses, timing differences in recognizing taxable market discount and timing differences in recognizing certain gains and losses on investment transactions. At April 30, 2006, the cost of investments was as follows: PREMIER INSURED INSURED INSURED INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) ------------------------------------------------------------------------------------------------------------------- Cost of investments $842,193,826 $1,811,592,637 $425,053,780 $750,935,804 $647,040,291 $396,626,314 =================================================================================================================== Gross unrealized appreciation and gross unrealized depreciation of investments at April 30, 2006, were as follows: PREMIER INSURED INSURED INSURED INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) ------------------------------------------------------------------------------------------------------------------- Gross unrealized: Appreciation $42,629,975 $97,750,303 $22,062,849 $26,723,209 $33,133,402 $14,237,678 Depreciation (2,372,896) (3,511,330) (979,120) (3,695,308) (3,324,206) (4,036,134) ------------------------------------------------------------------------------------------------------------------- Net unrealized appreciation (depreciation) of investments $40,257,079 $94,238,973 $21,083,729 $23,027,901 $29,809,196 $10,201,544 =================================================================================================================== The tax components of undistributed net investment income and net realized gains at October 31, 2005, the Funds' last tax year end, were as follows: PREMIER INSURED INSURED INSURED INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) ------------------------------------------------------------------------------------------------------------------- Undistributed net tax-exempt income * $6,201,252 $14,970,304 $2,420,156 $4,545,989 $3,696,503 $976,133 Undistributed net ordinary income ** -- 36,367 -- -- -- -- Undistributed net long-term capital gains 3,529,359 13,623,564 2,216,110 -- -- -- =================================================================================================================== * Undistributed net tax-exempt income (on a tax basis) has not been reduced for the dividend declared on October 3, 2005, paid on November 1, 2005. ** Net ordinary income consists of taxable market discount income and net short-term capital gains, if any. The tax character of distributions paid during the Funds' last tax year ended October 31, 2005, was designated for purposes of the dividends paid deduction as follows: PREMIER INSURED INSURED INSURED INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) ------------------------------------------------------------------------------------------------------------------- Distributions from net tax-exempt income $43,231,354 $88,622,431 $21,307,834 $36,572,931 $31,059,072 $18,006,667 Distributions from net ordinary income ** 425,383 -- 801,863 -- 320,955 -- Distributions from net long-term capital gains 1,943,044 2,854,341 981,459 -- 3,528,645 193,086 =================================================================================================================== ** Net ordinary income consists of taxable market discount income and net short-term capital gains, if any. 74 At October 31, 2005, the Funds' last tax year end, the following Funds had unused capital loss carryforwards available for federal income tax purposes to be applied against future capital gains, if any. If not applied the carryforwards will expire as follows: INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE INCOME 2 ADVANTAGE ADVANTAGE (NPX) (NVG) (NEA) -------------------------------------------------------------------------------- Expiration year: 2008 $1,274,854 $ -- $ -- 2009 -- -- -- 2010 -- -- -- 2011 -- -- -- 2012 -- -- -- 2013 -- 1,257,089 4,779,762 -------------------------------------------------------------------------------- Total $1,274,854 $1,257,089 $4,779,762 ================================================================================ 5. MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES Each Fund's management fee is separated into two components - a complex-level component, based on the aggregate amount of all fund assets managed by Nuveen Asset Management (the "Adviser"), a wholly owned subsidiary of Nuveen Investments, Inc., and a specific fund-level component, based only on the amount of assets within each individual fund. This pricing structure enables Nuveen fund shareholders to benefit from growth in the assets within each individual fund as well as from growth in the amount of complex-wide assets managed by the Adviser. The annual fund-level fee, payable monthly, for each Fund is based upon the average daily net assets (including net assets attributable to Preferred shares) of each Fund as follows: INSURED QUALITY (NQI) INSURED OPPORTUNITY (NIO) AVERAGE DAILY NET ASSETS PREMIER INSURED INCOME (NIF) (INCLUDING NET ASSETS INSURED PREMIUM INCOME 2 (NPX) ATTRIBUTABLE TO PREFERRED SHARES) FUND-LEVEL FEE RATE -------------------------------------------------------------------------------- For the first $125 million .4500% For the next $125 million .4375 For the next $250 million .4250 For the next $500 million .4125 For the next $1 billion .4000 For the next $3 billion .3875 For net assets over $5 billion .3750 ================================================================================ AVERAGE DAILY NET ASSETS INSURED DIVIDEND ADVANTAGE (NVG) (INCLUDING NET ASSETS INSURED TAX-FREE ADVANTAGE (NEA) ATTRIBUTABLE TO PREFERRED SHARES) FUND-LEVEL FEE RATE -------------------------------------------------------------------------------- For the first $125 million .4500% For the next $125 million .4375 For the next $250 million .4250 For the next $500 million .4125 For the next $1 billion .4000 For net assets over $2 billion .3750 ================================================================================ The annual complex-level fee, payable monthly, which is additive to the fund-level fee, for all Nuveen sponsored funds in the U.S., is based on the aggregate amount of total fund assets managed as stated in the table below. As of April 30, 2006, the complex-level fee rate was .1888%. 75 Notes to FINANCIAL STATEMENTS (Unaudited) (continued) COMPLEX-LEVEL ASSETS(1) COMPLEX-LEVEL FEE RATE -------------------------------------------------------------------------------- For the first $55 billion .2000% For the next $1 billion .1800 For the next $1 billion .1600 For the next $3 billion .1425 For the next $3 billion .1325 For the next $3 billion .1250 For the next $5 billion .1200 For the next $5 billion .1175 For the next $15 billion .1150 For Managed Assets over $91 billion(2) .1400 ================================================================================ (1) The complex-level fee component of the management fee for the funds is calculated based upon the aggregate Managed Assets ("Managed Assets" means the average daily net assets of each fund including assets attributable to all types of leverage used by the Nuveen funds) of Nuveen-sponsored funds in the U.S. (2) With respect to the complex-wide Managed Assets over $91 billion, the fee rate or rates that will apply to such assets will be determined at a later date. In the unlikely event that complex-wide Managed Assets reach $91 billion prior to a determination of the complex-level fee rate or rates to be applied to Managed Assets in excess of $91 billion, the complex-level fee rate for such complex-wide Managed Assets shall be .1400% until such time as a different rate or rates is determined. The management fee compensates the Adviser for overall investment advisory and administrative services and general office facilities. The Funds pay no compensation directly to their Directors/Trustees who are affiliated with the Adviser or to their Officers, all of whom receive remuneration for their services to the Funds from the Adviser or its affiliates. The Board of Directors/Trustees has adopted a deferred compensation plan for independent Directors/Trustees that enables Directors/Trustees to elect to defer receipt of all or a portion of the annual compensation they are entitled to receive from certain Nuveen advised funds. Under the plan, deferred amounts are treated as though equal dollar amounts had been invested in shares of select Nuveen advised funds. For the first ten years of Insured Dividend Advantage's (NVG) operations, the Adviser has agreed to reimburse the Fund, as a percentage of average daily net assets (including net assets attributable to Preferred shares), for fees and expenses in the amounts and for the time periods set forth below: YEAR ENDING YEAR ENDING MARCH 31, MARCH 31, -------------------------------------------------------------------------------- 2002* .30% 2008 .25% 2003 .30 2009 .20 2004 .30 2010 .15 2005 .30 2011 .10 2006 .30 2012 .05 2007 .30 ================================================================================ * From the commencement of operations. The Adviser has not agreed to reimburse Insured Dividend Advantage (NVG) for any portion of its fees and expenses beyond March 31, 2012. 76 For the first eight years of Insured Tax-Free Advantage's (NEA) operations, the Adviser has agreed to reimburse the Fund, as a percentage of average daily net assets (including net assets attributable to Preferred shares), for fees and expenses in the amounts and for the time periods set forth below: YEAR ENDING YEAR ENDING NOVEMBER 30, NOVEMBER 30, -------------------------------------------------------------------------------- 2002* .32% 2007 .32% 2003 .32 2008 .24 2004 .32 2009 .16 2005 .32 2010 .08 2006 .32 ================================================================================ * From the commencement of operations. The Adviser has not agreed to reimburse Insured Tax-Free Advantage (NEA) for any portion of its fees and expenses beyond November 30, 2010. As a result of certain trading errors that occurred during the six months ended April 30, 2006, Insured Quality (NQI) and Insured Opportunity (NIO) were reimbursed $27,762 and $42,338, respectively, by the Adviser to offset losses realized on the disposal of investments in violation of investment guidelines. 6. SUBSEQUENT EVENT - DISTRIBUTIONS TO COMMON SHAREHOLDERS The Funds declared Common share dividend distributions from their tax-exempt net investment income which were paid on June 1, 2006, to shareholders of record on May 15, 2006, as follows: PREMIER INSURED INSURED INSURED INSURED INSURED INSURED PREMIUM DIVIDEND TAX-FREE QUALITY OPPORTUNITY INCOME INCOME 2 ADVANTAGE ADVANTAGE (NQI) (NIO) (NIF) (NPX) (NVG) (NEA) --------------------------------------------------------------------------------------------------------- Dividend per share $.0670 $.0675 $.0675 $.0570 $.0705 $.0620 ========================================================================================================= 77 Financial HIGHLIGHTS (Unaudited) Selected data for a Common share outstanding throughout each period: Investment Operations Less Distributions --------------------------------------------------------------- ---------------------------------- Distributions Distributions from Net from Net Beginning Investment Capital Investment Capital Common Net Income to Gains to Income to Gains to Share Net Realized/ Preferred Preferred Common Common Net Asset Investment Unrealized Share- Share- Share- Share- Value Income Gain (Loss) holders+ holders+ Total holders holders Total ==================================================================================================================================== INSURED QUALITY (NQI) ------------------------------------------------------------------------------------------------------------------------------------ Year Ended 10/31: 2006(a) $15.31 $ .49 $ (.15) $(.11) $(.01) $.22 $ (.42) $(.08) $ (.50) 2005 15.85 1.03 (.39) (.16) -- .48 (.97) (.05) (1.02) 2004 15.72 1.08 .20 (.08) -- 1.20 (1.02) (.05) (1.07) 2003 15.87 1.10 (.05) (.07) (.01) .97 (1.00) (.12) (1.12) 2002 15.78 1.12 .03 (.11) (.01) 1.03 (.92) (.02) (.94) 2001 14.51 1.18 1.20 (.26) -- 2.12 (.85) -- (.85) INSURED OPPORTUNITY (NIO) ------------------------------------------------------------------------------------------------------------------------------------ Year Ended 10/31: 2006(a) 15.46 .49 (.08) (.10) (.03) .28 (.42) (.14) (.56) 2005 16.06 1.01 (.50) (.16) -- .35 (.92) (.03) (.95) 2004 15.89 1.05 .20 (.08) -- 1.17 (.97) (.03) (1.00) 2003 15.83 1.06 .17 (.07) (.01) 1.15 (.97) (.12) (1.09) 2002 15.72 1.15 .03 (.11) (.01) 1.06 (.93) (.02) (.95) 2001 14.64 1.17 1.04 (.26) -- 1.95 (.87) -- (.87) PREMIER INSURED INCOME (NIF) ------------------------------------------------------------------------------------------------------------------------------------ Year Ended 10/31: 2006(a) 15.33 .49 (.18) (.11) (.02) .18 (.41) (.10) (.51) 2005 16.00 1.01 (.49) (.16) (.01) .35 (.93) (.09) (1.02) 2004 15.69 1.03 .36 (.08) -- 1.31 (.98) (.02) (1.00) 2003 15.59 1.05 .13 (.07) -- 1.11 (.98) (.03) (1.01) 2002 15.55 1.14 (.05) (.11) -- .98 (.94) -- (.94) 2001 14.66 1.18 .85 (.26) -- 1.77 (.88) -- (.88) ==================================================================================================================================== Total Returns ------------------------- Offering Based Costs and Ending on Preferred Common Based Common Share Share Ending on Share Net Underwriting Net Asset Market Market Asset Discounts Value Value Value** Value** ============================================================================================== INSURED QUALITY (NQI) ---------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(a) $ -- $15.03 $14.55 (1.76)% 1.41%**** 2005 -- 15.31 15.31 2.11 3.09 2004 -- 15.85 16.00 4.37 7.90 2003 -- 15.72 16.39 12.92 6.27 2002 -- 15.87 15.55 10.82 6.83 2001 -- 15.78 14.92 15.53 14.94 INSURED OPPORTUNITY (NIO) ---------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(a) -- 15.18 14.57 4.17 1.79**** 2005 -- 15.46 14.52 (3.72) 2.21 2004 -- 16.06 16.05 9.47 7.64 2003 -- 15.89 15.64 10.22 7.51 2002 -- 15.83 15.21 9.80 7.01 2001 -- 15.72 14.74 19.84 13.61 PREMIER INSURED INCOME (NIF) ---------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(a) -- 15.00 14.44 3.77 1.11 2005 -- 15.33 14.40 (1.66) 2.16 2004 -- 16.00 15.64 7.55 8.62 2003 -- 15.69 15.51 7.84 7.28 2002 -- 15.59 15.33 6.84 6.57 2001 -- 15.55 15.25 19.97 12.40 ============================================================================================== Ratios/Supplemental Data ------------------------------------------------------------------------------------------------ Before Credit/Reimbursement After Credit/Reimbursement*** ----------------------------- ----------------------------- Ratio of Net Ratio of Net Ratio of Investment Ratio of Investment Ending Expenses Income to Expenses Income to Net to Average Average to Average Average Assets Net Assets Net Assets Net Assets Net Assets Applicable Applicable Applicable Applicable Applicable Portfolio to Common to Common to Common to Common to Common Turnover Shares (000) Shares++ Shares++ Shares++ Shares++ Rate ============================================================================================================================ INSURED QUALITY (NQI) ---------------------------------------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(a) $ 575,498 1.20%* 6.54%* 1.20%* 6.54%* 5% 2005 585,777 1.19 6.58 1.19 6.58 21 2004 605,028 1.19 6.88 1.19 6.88 8 2003 598,102 1.20 6.93 1.20 6.94 14 2002 601,495 1.23 7.22 1.21 7.24 44 2001 596,999 1.24 7.72 1.23 7.74 34 INSURED OPPORTUNITY (NIO) ---------------------------------------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(a) 1,231,901 1.16* 6.43* 1.16* 6.44* 8 2005 1,254,638 1.16 6.35 1.16 6.35 25 2004 1,302,985 1.16 6.59 1.16 6.59 8 2003 1,288,087 1.17 6.67 1.16 6.68 21 2002 1,283,353 1.20 7.42 1.19 7.42 37 2001 1,274,659 1.21 7.69 1.20 7.70 39 PREMIER INSURED INCOME (NIF) ---------------------------------------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(a) 291,250 1.21* 6.49* 1.21* 6.49* 6 2005 297,624 1.20 6.39 1.20 6.40 20 2004 310,666 1.21 6.53 1.20 6.53 13 2003 303,912 1.22 6.66 1.21 6.68 25 2002 301,121 1.25 7.40 1.23 7.42 43 2001 299,654 1.26 7.79 1.24 7.81 34 ============================================================================================================================ Preferred Shares at End of Period -------------------------------------------- Aggregate Liquidation Amount and Market Asset Outstanding Value Coverage (000) Per Share Per Share ============================================================================ INSURED QUALITY (NQI) ---------------------------------------------------------------------------- Year Ended 10/31: 2006(a) $318,000 $25,000 $70,244 2005 318,000 25,000 71,052 2004 318,000 25,000 72,565 2003 318,000 25,000 72,021 2002 318,000 25,000 72,287 2001 318,000 25,000 71,934 INSURED OPPORTUNITY (NIO) ---------------------------------------------------------------------------- Year Ended 10/31: 2006(a) 680,000 25,000 70,290 2005 680,000 25,000 71,126 2004 680,000 25,000 72,904 2003 680,000 25,000 72,356 2002 680,000 25,000 72,182 2001 680,000 25,000 71,862 PREMIER INSURED INCOME (NIF) ---------------------------------------------------------------------------- Year Ended 10/31: 2006(a) 161,000 25,000 70,225 2005 161,000 25,000 71,215 2004 161,000 25,000 73,240 2003 161,000 25,000 72,191 2002 161,000 25,000 71,758 2001 161,000 25,000 71,530 ============================================================================ * Annualized. ** Total Return on Market Value is the combination of changes in the market price per share and the effect of reinvested dividend income and reinvested capital gains distributions, if any, at the average price paid per share at the time of reinvestment. Total Return on Common Share Net Asset Value is the combination of changes in Common share net asset value, reinvested dividend income at net asset value and reinvested capital gains distributions at net asset value, if any. Total returns are not annualized. *** After custodian fee credit and expense reimbursement, where applicable. **** During the six months ended April 30, 2006, Insured Quality's (NQI) and Insured Opportunity's (NIO) received payments from the Adviser of $27,762 and $42,338, respectively, to offset losses realized on the disposal of investments purchased in violation of each Fund's investment restrictions. This reimbursement did not have an impact on the Funds' Total Return on Common Share Net Asset Value. + The amounts shown are based on Common share equivalents. ++ Ratios do not reflect the effect of dividend payments to Preferred shareholders; income ratios reflect income earned on assets attributable to Preferred shares. (a) For the six months ended April 30, 2006. See accompanying notes to financial statements. 78-79 spread Financial HIGHLIGHTS (Unaudited) (continued) Selected data for a Common share outstanding throughout each period: Investment Operations Less Distributions --------------------------------------------------------------- ---------------------------------- Distributions Distributions from Net from Net Beginning Investment Capital Investment Capital Common Net Income to Gains to Income to Gains to Share Net Realized/ Preferred Preferred Common Common Net Asset Investment Unrealized Share- Share- Share- Share- Value Income Gain (Loss) holders+ holders+ Total holders holders Total ==================================================================================================================================== INSURED PREMIUM INCOME 2 (NPX) ------------------------------------------------------------------------------------------------------------------------------------ Year Ended 10/31: 2006(c) $13.93 $ .43 $ (.11) $(.10) $ -- $ .22 $ (.36) $ -- $ (.36) 2005 14.45 .89 (.44) (.14) -- .31 (.83) -- (.83) 2004 14.24 .93 .23 (.07) -- 1.09 (.88) -- (.88) 2003 14.17 .96 .03 (.06) -- .93 (.86) -- (.86) 2002 13.94 .99 .16 (.10) -- 1.05 (.82) -- (.82) 2001 13.05 1.01 .86 (.23) -- 1.64 (.75) -- (.75) INSURED DIVIDEND ADVANTAGE (NVG) ------------------------------------------------------------------------------------------------------------------------------------ Year Ended 10/31: 2006(c) 15.23 .50 (.05) (.12) -- .33 (.42) -- (.42) 2005 15.78 1.00 (.38) (.15) (.01) .46 (.89) (.12) (1.01) 2004 15.41 1.02 .42 (.07) -- 1.37 (.93) (.07) (1.00) 2003 15.35 1.03 .15 (.07) (.01) 1.10 (.93) (.11) (1.04) 2002(a) 14.33 .55 1.10 (.05) -- 1.60 (.47) -- (.47) INSURED TAX-FREE ADVANTAGE (NEA) ------------------------------------------------------------------------------------------------------------------------------------ Year Ended 10/31: 2006(c) 14.56 .48 (.01) (.11) -- .36 (.37) -- (.37) 2005 14.75 .97 (.19) (.15) -- .63 (.81) (.01) (.82) 2004 14.54 .99 .21 (.07) -- 1.13 (.92) (.01) (.93) 2003(b) 14.33 .82 .42 (.05) -- 1.19 (.78) -- (.78) ==================================================================================================================================== Total Returns ----------------------- Offering Based Costs and Ending on Preferred Common Based Common Share Share Ending on Share Net Underwriting Net Asset Market Market Asset Discounts Value Value Value** Value** =========================================================================================== INSURED PREMIUM INCOME 2 (NPX) ------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(c) $ -- $13.79 $12.66 1.45% 1.55% 2005 -- 13.93 12.83 (3.32) 2.14 2004 -- 14.45 14.11 6.42 7.89 2003 -- 14.24 14.12 8.84 6.70 2002 -- 14.17 13.77 6.32 7.83 2001 -- 13.94 13.75 29.46 12.85 INSURED DIVIDEND ADVANTAGE (NVG) ------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(c) -- 15.14 15.10 9.66 2.19 2005 -- 15.23 14.17 2.00 2.93 2004 -- 15.78 14.89 7.61 9.19 2003 -- 15.41 14.81 6.10 7.37 2002(a) (.11) 15.35 14.96 2.84 10.44 INSURED TAX-FREE ADVANTAGE (NEA) ------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(c) -- 14.55 13.71 5.05 2.49 2005 -- 14.56 13.41 (4.68) 4.33 2004 .01 14.75 14.91 7.41 8.07 2003(b) (.20) 14.54 14.79 3.87 6.98 =========================================================================================== Ratios/Supplemental Data ------------------------------------------------------------------------------------------------ Before Credit/Reimbursement After Credit/Reimbursement*** ----------------------------- ----------------------------- Ratio of Net Ratio of Net Ratio of Investment Ratio of Investment Ending Expenses Income to Expenses Income to Net to Average Average to Average Average Assets Net Assets Net Assets Net Assets Net Assets Applicable Applicable Applicable Applicable Applicable Portfolio to Common to Common to Common to Common to Common Turnover Shares (000) Shares++ Shares++ Shares++ Shares++ Rate ========================================================================================================================== INSURED PREMIUM INCOME 2 (NPX) -------------------------------------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(c) $515,211 1.16%* 6.18%* 1.16%* 6.18%* 4% 2005 520,508 1.16 6.20 1.16 6.20 23 2004 539,697 1.16 6.52 1.16 6.53 14 2003 530,975 1.17 6.68 1.16 6.69 31 2002 527,800 1.20 7.13 1.19 7.14 26 2001 519,296 1.22 7.39 1.20 7.41 27 INSURED DIVIDEND ADVANTAGE (NVG) -------------------------------------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(c) 451,207 1.15* 6.18* .69* 6.63* 9 2005 454,018 1.15 5.96 .70 6.42 2 2004 470,389 1.15 6.09 .70 6.54 11 2003 459,368 1.17 6.22 .72 6.67 25 2002(a) 457,432 1.10* 5.71* .61* 6.20* 22 INSURED TAX-FREE ADVANTAGE (NEA) -------------------------------------------------------------------------------------------------------------------------- Year Ended 10/31: 2006(c) 269,324 1.18* 6.17* .69* 6.66* -- 2005 269,614 1.19 6.06 .70 6.55 1 2004 273,112 1.20 6.24 .71 6.73 13 2003(b) 269,112 1.12* 5.52* .65* 6.00* 72 ========================================================================================================================== Preferred Shares at End of Period -------------------------------------------- Aggregate Liquidation Amount and Market Asset Outstanding Value Coverage (000) Per Share Per Share ======================================================================= INSURED PREMIUM INCOME 2 (NPX) ----------------------------------------------------------------------- Year Ended 10/31: 2006(c) $268,900 $25,000 $72,900 2005 268,900 25,000 73,392 2004 268,900 25,000 75,176 2003 268,900 25,000 74,365 2002 268,900 25,000 74,070 2001 268,900 25,000 73,280 INSURED DIVIDEND ADVANTAGE (NVG) ----------------------------------------------------------------------- Year Ended 10/31: 2006(c) 233,000 25,000 73,413 2005 233,000 25,000 73,714 2004 233,000 25,000 75,471 2003 233,000 25,000 74,288 2002(a) 233,000 25,000 74,081 INSURED TAX-FREE ADVANTAGE (NEA) ----------------------------------------------------------------------- Year Ended 10/31: 2006(c) 144,000 25,000 71,758 2005 144,000 25,000 71,808 2004 144,000 25,000 72,415 2003(b) 144,000 25,000 71,721 ======================================================================= * Annualized. ** Total Return on Market Value is the combination of changes in the market price per share and the effect of reinvested dividend income and reinvested capital gains distributions, if any, at the average price paid per share at the time of reinvestment. Total Return on Common Share Net Asset Value is the combination of changes in Common share net asset value, reinvested dividend income at net asset value and reinvested capital gains distributions at net asset value, if any. Total returns are not annualized. *** After custodian fee credit and expense reimbursement, where applicable. + The amounts shown are based on Common share equivalents. ++ Ratios do not reflect the effect of dividend payments to Preferred shareholders; income ratios reflect income earned on assets attributable to Preferred shares. (a) For the period March 25, 2002 (commencement of operations) through October 31, 2002. (b) For the period November 21, 2002 (commencement of operations) through October 31, 2003. (c) For the six months ended April 30, 2006. See accompanying notes to financial statements. 80-81 spread Reinvest Automatically EASILY AND CONVENIENTLY Sidebar text: NUVEEN MAKES REINVESTING EASY. A PHONE CALL IS ALL IT TAKES TO SET UP YOUR REINVESTMENT ACCOUNT. NUVEEN EXCHANGE-TRADED CLOSED-END FUNDS DIVIDEND REINVESTMENT PLAN Your Nuveen Exchange-Traded Closed-End Fund allows you to conveniently reinvest dividends and/or capital gains distributions in additional fund shares. By choosing to reinvest, you'll be able to invest money regularly and automatically, and watch your investment grow through the power of tax-free compounding. Just like dividends or distributions in cash, there may be times when income or capital gains taxes may be payable on dividends or distributions that are reinvested. It is important to note that an automatic reinvestment plan does not ensure a profit, nor does it protect you against loss in a declining market. EASY AND CONVENIENT To make recordkeeping easy and convenient, each month you'll receive a statement showing your total dividends and distributions, the date of investment, the shares acquired and the price per share, and the total number of shares you own. HOW SHARES ARE PURCHASED The shares you acquire by reinvesting will either be purchased on the open market or newly issued by the Fund. If the shares are trading at or above net asset value at the time of valuation, the Fund will issue new shares at the then-current market price. If the shares are trading at less than net asset value, shares for your account will be purchased on the open market. Dividends and distributions received to purchase shares in the open market will normally be invested shortly after the dividend payment date. No interest will be paid on dividends and distributions awaiting reinvestment. Because the market price of the shares may increase before purchases are completed, the average purchase price per share may exceed the market price at the time of valuation, resulting in the acquisition of fewer shares than if the dividend or distribution had been paid in shares issued by the Fund. A pro rata portion of any applicable brokerage commissions on open market purchases will be paid by Plan participants. These commissions usually will be lower than those charged on individual transactions. FLEXIBLE You may change your distribution option or withdraw from the Plan at any time, should your needs or situation change. Should you withdraw, you can receive a certificate for all whole shares credited to your reinvestment account and cash payment for fractional shares, or cash payment for all reinvestment account shares, less brokerage commissions and a $2.50 service fee. You can reinvest whether your shares are registered in your name, or in the name of a brokerage firm, bank, or other nominee. Ask your investment advisor if his or her firm will participate on your behalf. Participants whose shares are registered in the name of one firm may not be able to transfer the shares to another firm and continue to participate in the Plan. The Fund reserves the right to amend or terminate the Plan at any time. Although the Fund reserves the right to amend the Plan to include a service charge payable by the participants, there is no direct service charge to participants in the Plan at this time. CALL TODAY TO START REINVESTING DIVIDENDS AND/OR DISTRIBUTIONS For more information on the Nuveen Automatic Reinvestment Plan or to enroll in or withdraw from the Plan, speak with your financial advisor or call us at (800) 257-8787. 82 Other Useful INFORMATION QUARTERLY PORTFOLIO OF INVESTMENTS AND PROXY VOTING INFORMATION Each Fund's (i) quarterly portfolio of investments, (ii) information regarding how the Funds voted proxies relating to portfolio securities held during the 12-month period ended June 30, 2005, and (iii) a description of the policies and procedures that the Funds used to determine how to vote proxies relating to portfolio securities are available without charge, upon request, by calling Nuveen Investments toll-free at (800) 257-8787 or on Nuveen's website at www.nuveen.com. You may also obtain this and other Fund information directly from the Securities and Exchange Commission ("SEC"). The SEC may charge a copying fee for this information. Visit the SEC on-line at http://www.sec.gov or in person at the SEC's Public Reference Room in Washington, D.C. Call the SEC at 1-202-942-8090 for room hours and operation. You may also request Fund information by sending an e-mail request to publicinfo@sec.gov or by writing to the SEC's Public References Section at 450 Fifth Street NW, Washington, D.C. 20549. GLOSSARY OF TERMS USED IN THIS REPORT AVERAGE ANNUAL TOTAL RETURN: This is a commonly used method to express an investment's performance over a particular, usually multi-year time period. It expresses the return that would have been necessary each year to equal the investment's actual cumulative performance (including change in NAV or market price and reinvested dividends and capital gains distributions, if any) over the time period being considered. AVERAGE EFFECTIVE MATURITY: The average of all the maturities of the bonds in a Fund's portfolio, computed by weighting each maturity date (the date the security comes due) by the market value of the security. This figure does not account for the likelihood of prepayments or the exercise of call provisions. MODIFIED DURATION: Duration is a measure of the expected period over which a bond's principal and interest will be paid, and consequently is a measure of the sensitivity of a bond's or bond Fund's value to changes when market interest rates change. Generally, the longer a bond's or Fund's duration, the more the price of the bond or Fund will change as interest rates change. MARKET YIELD (ALSO KNOWN AS DIVIDEND YIELD OR CURRENT YIELD): An investment's current annualized dividend divided by its current market price. NET ASSET VALUE (NAV): A Fund's common share NAV per share is calculated by subtracting the liabilities of the Fund (including any MuniPreferred shares issued in order to leverage the Fund) from its total assets and then dividing the remainder by the number of shares outstanding. Fund NAVs are calculated at the end of each business day. TAXABLE-EQUIVALENT YIELD: The yield necessary from a fully taxable investment to equal, on an after-tax basis, the yield of a municipal bond investment. BOARD OF DIRECTORS/TRUSTEES Robert P. Bremner Lawrence H. Brown Jack B. Evans William C. Hunter David J. Kundert William J. Schneider Timothy R. Schwertfeger Judith M. Stockdale Eugene S. Sunshine FUND MANAGER Nuveen Asset Management 333 West Wacker Drive Chicago, IL 60606 CUSTODIAN State Street Bank & Trust Company Boston, MA TRANSFER AGENT AND SHAREHOLDER SERVICES State Street Bank & Trust Company Nuveen Funds P.O. Box 43071 Providence, RI 02940-3071 (800) 257-8787 LEGAL COUNSEL Chapman and Cutler LLP Chicago, IL INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Ernst & Young LLP Chicago, IL Each Fund intends to repurchase shares of its own common or preferred stock in the future at such times and in such amounts as is deemed advisable. No shares were repurchased during the period covered by this report. Any future repurchases will be reported to shareholders in the next annual or semiannual report. 83 Nuveen Investments: SERVING Investors For GENERATIONS Photo of: 2 women looking at a photo album. Since 1898, financial advisors and their clients have relied on Nuveen Investments to provide dependable investment solutions. For the past century, Nuveen Investments has adhered to the belief that the best approach to investing is to apply conservative risk-management principles to help minimize volatility. Building on this tradition, we today offer a range of high quality equity and fixed-income solutions that are integral to a well-diversified core portfolio. Our clients have come to appreciate this diversity, as well as our continued adherence to proven, long-term investing principles. WE OFFER MANY DIFFERENT INVESTING SOLUTIONS FOR OUR CLIENTS' DIFFERENT NEEDS. Managing more than $145 billion in assets, Nuveen Investments offers access to a number of different asset classes and investing solutions through a variety of products. Nuveen Investments markets its capabilities under four distinct brands: Nuveen, a leader in fixed-income investments; NWQ, a leader in value-style equities; Rittenhouse, a leader in growth-style equities; and Symphony, a leading institutional manager of market-neutral alternative investment portfolios. FIND OUT HOW WE CAN HELP YOU REACH YOUR FINANCIAL GOALS. To learn more about the products and services Nuveen Investments offers, talk to your financial advisor, or call us at (800) 257-8787. Please read the information provided carefully before you invest. Be sure to obtain a prospectus, where applicable. Investors should consider the investment objective and policies, risk considerations, charges and expenses of the Fund carefully before investing. The prospectus contains this and other information relevant to an investment in the Fund. For a prospectus, please contact your securities representative or Nuveen Investments, 333 W. Wacker Dr., Chicago, IL 60606. Please read the prospectus carefully before you invest or send money. o Share prices o Fund details Learn more o Daily financial news about Nuveen Funds at o Investor education WWW.NUVEEN.COM/CEF o Interactive planning tools Logo: NUVEEN Investments ESA-D-0406D ITEM 2. CODE OF ETHICS. Not applicable to this filing. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable to this filing. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable to this filing. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable to this filing. ITEM 6. SCHEDULE OF INVESTMENTS. See Portfolio of Investments in Item 1. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to this filing. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to this filing. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. Not applicable. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. During this reporting period, the registrant's Board of Trustees implemented a change to the procedures by which shareholders may recommend nominees to the registrant's board of trustees by amending the registrant's by-laws to include a provision specifying the date by which shareholder nominations for election as trustee at a subsequent meeting must be submitted to the registrant. Shareholders must deliver or mail notice to the registrant not less than forty-five days nor more than sixty days prior to the first anniversary date of the date on which the registrant first mailed its proxy materials for the prior year's annual meeting; provided, however, if an only if the annual meeting is not scheduled to be held within a period that commences thirty days before the first anniversary date of the annual meeting for the preceding year and ends thirty days after such anniversary date (an annual meeting date outside such period being referred to as an "Other Annual Meeting Date" hereafter), the shareholder notice must be given no later than the close of business on the date forty-five days prior to such Other Annual Meeting Date or the tenth business day following the date such Other Annual Meeting Date is first publicly announced or disclosed. The shareholder's notice must be in writing and set forth the name, age, date of birth, business address, residence address and nationality of the person(s) being nominated and the class or series, number of all shares of the registrant owned of record or beneficially be each such person(s), any other information regarding such person required by Item 401 of Regulation S-K or Item 22 of Rule 14a-101 (Schedule 14A) under the Securities Exchange Act of 1934, as amended, any other information regarding the person(s) to be nominated that would be required to be disclosed in a proxy statement or other filings required to be made in connection with solicitation of proxies for election of trustees, and whether such shareholder believes any nominee is or will be an "interested person" (as that term is defined in the Investment Company Act of 1940, as amended) of the registrant or sufficient information to enable the registrant to make that determination and the written and signed consent of the person(s) to be nominated. ITEM 11. CONTROLS AND PROCEDURES. (a) The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")(17 CFR 240.13a-15(b) or 240.15d-15(b)). (b) There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 12. EXHIBITS. File the exhibits listed below as part of this Form. (a)(1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit: Not applicable to this filing. (a)(2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)) in the exact form set forth below: Ex-99.CERT attached hereto. (a)(3) Any written solicitation to purchase securities under Rule 23c-1 under the 1940 Act (17 CFR 270.23c-1) sent or given during the period covered by the report by or on behalf of the registrant to 10 or more persons: Not applicable. (b) If the report is filed under Section 13(a) or 15(d) of the Exchange Act, provide the certifications required by Rule 30a-2(b) under the 1940 Act (17 CFR 270.30a-2(b)); Rule 13a-14(b) or Rule 15d-14(b) under the Exchange Act (17 CFR 240.13a-14(b) or 240.15d-14(b)), and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) as an exhibit. A certification furnished pursuant to this paragraph will not be deemed "filed" for purposes of Section 18 of the Exchange Act (15 U.S.C. 78r), or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference. Ex-99.906 CERT attached hereto. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Nuveen Insured Tax-Free Advantage Municipal Fund ----------------------------------------------------------- By (Signature and Title)* /s/ Jessica R. Droeger ---------------------------------------------- Jessica R. Droeger Vice President and Secretary Date: July 7, 2006 ------------------------------------------------------------------- Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Gifford R. Zimmerman ---------------------------------------------- Gifford R. Zimmerman Chief Administrative Officer (principal executive officer) Date: July 7, 2006 ------------------------------------------------------------------- By (Signature and Title)* /s/ Stephen D. Foy ---------------------------------------------- Stephen D. Foy Vice President and Controller (principal financial officer) Date: July 7, 2006 ------------------------------------------------------------------- * Print the name and title of each signing officer under his or her signature.