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 811-5531 --------------------------------------------- MassMutual Participation Investors -------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 1500 Main Street, Suite 600, P.O. Box 15189, Springfield, MA 01115-5189 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Rodney J. Dillman, Vice President and Secretary 1500 Main Street, Suite 2800, P.O. Box 15189, Springfield, MA 01115-5189 -------------------------------------------------------------------------------- (Name and address of agent for service) Registrant's telephone number, including area code: 413-226-1000 ---------------------------- Date of fiscal year end: 12/31 ------------------ Date of reporting period: 12/31/07 ------------------ 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. REPORT TO STOCKHOLDERS. Attached hereto is the annual shareholder report transmitted to shareholders pursuant to Rule 30e-1 of the Investment Company Act of 1940, as amended. [LOGO] MASSMUTUAL PARTICIPATION INVESTORS 2007 ANNUAL REPORT MASSMUTUAL PARTICIPATION INVESTORS c/o Babson Capital Management LLC 1500 Main Street Suite 600, P.O. Box 15189 Springfield, Massachusetts 01115-5189 (413) 226-1516 http://www.BabsonCapital.com/mpv ADVISER Babson Capital Management LLC 1500 Main Street, P.O. Box 15189 Springfield, Massachusetts 01115-5189 INDEPENDENT REGISTERED PUBIC ACCOUNTING FIRM KPMG LLP Boston, Massachusetts 02110 COUNSEL TO THE TRUST Ropes & Gray LLP Boston, Massachusetts 02110 CUSTODIAN Citibank, N.A. New York, New York 10043 TRANSFER AGENT & REGISTRAR Shareholder Financial Services, Inc. P.O. Box 173673 Denver, Colorado 80217-3673 1-800-647-7374 MPV Listed NYSE PROXY VOTING POLICIES & PROCEDURES; PROXY VOTING RECORD The Trustees of MassMutual Participation Investors (the "Trust") have delegated proxy voting responsibilities relating to the voting of securities held by the Trust to Babson Capital Management LLC ("Babson Capital"). A description of Babson Capital's proxy voting policies and procedures is available (1) without charge, upon request, by calling, toll-free 1-866-399-1516; (2) on the Trust's website at http://www.BabsonCapital.com/mpv; and (3) on the U.S. Securities and Exchange Commission's ("SEC") website at http://www.sec.gov. Information regarding how the Trust voted proxies relating to portfolio securities during the most recent 12-month period ended June 30, 2007 is available (1) on the Trust's web-site at http://www. BabsonCapital.com/mpv; and (2) on the SEC's website at http://www.sec.gov. FORM N-Q The Trust files its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. This information is available (i) on the SEC's website at http://www.sec.gov; and (ii) at the SEC's Public Reference Room in Washington, DC (which information on their operation may be obtained by calling 1-800-SEC-0330). A complete schedule of portfolio holdings as of each quarter-end is available on the Trust's website at http://www.BabsonCapital.com/mpv or upon request by calling, toll-free, 1-866-399-1516. MASSMUTUAL PARTICIPATION INVESTORS MassMutual Participation Investors is a closed-end investment company, first offered to the public in 1988, whose shares are traded on the New York Stock Exchange. -------------------------------------------------------------------------------- MassMutual Participation Investors INVESTMENT OBJECTIVE & POLICY MassMutual Participation Investors (the "Trust") is a closedend investment company, first offered to the public in 1988, whose shares are traded on the New York Stock Exchange under the trading symbol "MPV". The Trust's share price can be found in the financial section of most newspapers as "MassPrt" or "MassMuPrt" under either the New York Stock Exchange listings or Closed-End Fund listings. The Trust's investment objective is to maximize total return by providing a high level of current income, the potential for growth of income, and capital appreciation. The Trust's principal investments are privately placed, below-investment grade, long-term debt obligations purchased directly from their issuers, which tend to be smaller companies. At least half of these investments normally include equity features such as warrants, conversion rights, or other equity features that provide the Trust with the opportunity to realize capital gains. The Trust will also invest in publicly traded debt securities (including high yield securities), again with an emphasis on those with equity features, and in convertible preferred stocks and, subject to certain limitations, readily marketable equity securities. Below investment grade or high yield securities have predominantly speculative characteristics with respect to the capacity of the issuer to pay interest and repay principal. In addition, the Trust may temporarily invest in high quality, readily marketable securities. Babson Capital Management LLC ("Babson Capital") manages the Trust on a total return basis. The Trust distributes substantially all of its net income to shareholders each year. Accordingly, the Trust pays dividends to shareholders quarterly in January, May, August, and November. All registered shareholders are automatically enrolled in the Dividend Reinvestment and Cash Purchase Plan unless cash distributions are requested. In this report you will find a complete listing of the Trust's holdings. We encourage you to read this section carefully for a better understanding of the Trust. We cordially invite all shareholders to attend the Trust's Annual Meeting of Shareholders, which will be held on April 25, 2008 at 1:00 P.M. in Springfield, Massachusetts. -------------------------------------------------------------------------------- 1 MassMutual Participation Investors TOTAL ANNUAL PORTFOLIO RETURN (AS OF 12/31 EACH YEAR)* [BAR CHART APPEARS HERE] 10.91 4.77 8.11 3.47 5.70 23.72 25.14 22.51 18.64 9.95 MASSMUTUAL PARTICIPATION INVESTORS (BASED ON CHANGE IN THE NET ASSET VALUE WITH REINVESTED DIVIDENDS) -2.56 21.26 -3.03 2.49 -20.48 47.25 18.33 4.55 18.37 -1.57 RUSSELL 2000 INDEX 1.87 2.39 -5.86 5.28 -1.41 28.97 11.13 2.74 11.85 1.87 LEHMAN BROTHERS U.S. CORPORATE HIGH YIELD INDEX 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 * Data for MassMutual Participation Investors (the "Trust") represents portfolio returns based on change in the Trust's net asset value assuming the reinvestment of all dividends and distributions which differs from the total investment return based on market value of the Trust's shares due to the difference between the Trust's net asset value and the market value of its shares outstanding (see page 12 for total investment return based on market value); past performance is no guarantee of future results. PORTFOLIO COMPOSITION AS OF 12/31/07* [PIE CHART APPEARS HERE] Private / 144A Cash & Short Term High Yield Debt Invesments 54.0% 6.1% Private Investment Public High Grade Debt Yield Debt 1.4% 21.4% Private / Restricted Public Equity Equity 1.4% 15.7% *Based on value of total investments (including cash) -------------------------------------------------------------------------------- 2 MassMutual Participation Investors TO OUR SHAREHOLDERS I am pleased to share with you the Trust's Annual Report for the year ended December 31, 2007. THE TRUST'S 2007 PORTFOLIO PERFORMANCE The Trust's net total portfolio rate of return for 2007 was 9.95%, as measured by the change in net asset value, assuming the reinvestment of all dividends and distributions. The Trust's total net assets were $126,625,334, or $12.84 per share, as of December 31, 2007 compared to $126,515,013, or $12.90 per share, as of December 31, 2006. The Trust paid a quarterly dividend of 25 cents per share for each quarter of 2007, with the fourth quarter dividend paid in January 2008. In addition, the Trust declared a special year-end dividend of 25 cents per share, paid in January to shareholders of record on December 31, 2007, bringing total dividends for the year to $1.25 per share. We are very pleased with the Trust's 2007 portfolio performance. The table below lists the average annual net returns of the Trust's portfolio, based on the change in net assets, assuming the reinvestment of all dividends and distributions, compared to the average annual returns of the Lehman Brothers U.S. Corporate High Yield Index and the Russell 2000 Index for the 1, 3, 5 and 10 years ended December 31, 2007. Lehman Brothers U.S. Russell The Trust Corporate High Yield Index 2000 Index -------------------------------------------------------------------------------- 1 Year 9.95% 1.87% -1.57% -------------------------------------------------------------------------------- 3 Year 16.91% 5.39% 6.80% -------------------------------------------------------------------------------- 5 Year 19.86% 10.90% 16.24% -------------------------------------------------------------------------------- 10 Year 13.01% 5.51% 7.08% -------------------------------------------------------------------------------- Past performance is no guarantee of future results. [PHOTO OF PRESIDENT AND CHAIRMAN] Left to right: Clifford M. Noreen PRESIDENT Roger W. Crandall CHAIRMAN -------------------------------------------------------------------------------- 3 MassMutual Participation Investors The U.S. economy and investment markets started the year strong but 2007 will long be remembered for the major mortgage- and credit-market crisis that wreaked havoc in the second half of the year and into 2008. The issues began in the residential sub-prime mortgage market, where underwriting standards that began loosening in 2005 allowed many homeowners to borrow debt that could only be supported by continuously rising home prices. As housing prices softened, mortgage defaults and foreclosures rose dramatically and mortgage related collateralized debt obligation (CDO) products also suffered. General investor confidence began to tumble, and the major stock market indexes experienced declines and volatility not seen in some time, eventually closing the year with modest gains but concerns among many analysts of what could be next. Overall, the US economy finished 2007 on an uncertain note. The unemployment rate was 5 percent in December, up from 4.5 percent the previous year, according to the US Department of Labor. Also, core inflation was 2.3 percent at year's end, not quite as bad as the 2.6 percent increase during 2006. The value of the dollar versus several other currencies, however, dropped precipitously in 2007. The corporate credit market continued a remarkable run, as corporate credit defaults around the globe continued their downward trend for the fifth consecutive year, according to Moody's Investors Service. Moody's global issuer-weighted speculativegrade default rate finished the year at 0.9 percent, down from 1.7 percent in 2006 and its lowest level since 1981. Moody's expects the default rate to climb in 2008 to 4.8 percent and reach its historical average of 5 percent in 2009. Corporate bond spreads widened significantly in the second half of 2007 and the trend continued at the beginning of 2008. PORTFOLIO ACTIVITY Overall, the Trust closed 20 new private placement transactions during 2007 and added to five existing private placement investments. Total direct placement purchases were $23,908,409. -------------------------------------------------------------------------------- 4 MassMutual Participation Investors New private placement transactions invested in during the year were: Advanced Technologies Holdings, Inc.; A H C Holding Company Inc.; Aero Holdings, Inc.; Connecticut Electric, Inc.; Electra Bicycle Company LLC; Golden Country Foods Holding, Inc.; NetShape Technologies, Inc.; K H O F Holdings, Inc.; K W P I Holdings Corporation; K-Tek Holding Corporation; Mail Communications Group, Inc.; Nesco Holdings Corporation; Pacific Consolidated Holdings LLC; Smart Source Holdings LLC; Torrent Group Holdings, Inc.; Total Equipment & Service, Inc.; Transpac Holding Company; Visioneering, Inc.; Waggin' Train Holdings LLC; and Workplace Media Holding Co. In addition, the Trust added to existing private placement investments in HM Holding Company; Moss, Inc.; NABCO, Inc.; Savage Sports Holding, Inc.; and Transtar Holding Company. The Trust also had 14 realizations in 2007. [PHOTO OF OFFICERS] Left to right: James M. Roy VICE PRESIDENT & CHIEF FINANCIAL OFFICER Rodney J. Dillman VICE PRESIDENT, SECRETARY & CHIEF LEGAL OFFICER Jill A. Fields VICE PRESIDENT Michael P. Hermsen VICE PRESIDENT Michael L. Klofas VICE PRESIDENT Richard E. Spencer, II VICE PRESIDENT -------------------------------------------------------------------------------- 5 MassMutual Participation Investors OUTLOOK FOR 2008 The year 2008 opened with worldwide financial markets under pressure. The credit crisis continues to find new victims and with each new report, investor confidence wanes further. Consumer confidence showed cracks in late 2007, and the housing market may take some time to hit bottom. Oil prices rose to new heights in the latter half of 2007 and approached $100 per barrel. Early Fed action in 2008 indicates that it is targeting lower interest rates to help the residential real estate market and weakening economy. As always, no one can predict the future with any degree of certainty. Despite all this, merger and acquisition activity continued at a record pace in 2007, although activity is expected to be lower in 2008. Last year saw $4.5 trillion in announced deals worldwide, up 24 percent from 2006, according to Thomson Financial, and included the three largest leveraged buyouts in history. Private equity firms had been a significant part of the activity in the first six months of 2007 (reportedly more than 30 percent of total volume), but nearly disappeared in the second half of the year and are expected to be very quiet at the start of 2008. Corporate buyers are expected to be more active players, as they are flush with cash. Regardless of the economic environment, however, the Trust continues to repeatedly employ the investment philosophy that has served it well since its inception: investing in companies which we believe have a strong business model, solid cash flow and experienced, ethical management. This philosophy, combined with Babson Capital's seasoned investment-management team and the Trust's financial position, contribute to the Trust being well positioned for future investment opportunities that meet its investment objectives and policies. As always, I would like to thank you for your continued interest in and support of MassMutual Participation Investors. Sincerely, /s/ Clifford M. Noreen Clifford M. Noreen, President Cautionary Notice: Certain statements contained in this report may be "forward looking" statements. Investors are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date in which they are made and which reflect management's current estimates, projections, expectations or beliefs, and which are subject to risks and uncertainties that may cause actual results to differ materially. These statements are subject to change at any time based upon economic, market or other conditions and may not be relied upon as investment advice or an indication of the Trust's trading intent. References to specific securities are not recommendations of such securities, and may not be representative of the Trust's current or future investments. We undertake no obligation to publicly update forward looking statements, whether as a result of new information, future events, or otherwise. -------------------------------------------------------------------------------- 2007 Record Net Investment Short-Term Tax Long-Term Dividends Date Income Gains Effect Gains -------------------------------------------------------------------------------- Regular 5/7/2007 0.2500 -- -- 7/27/2007 0.2500 -- -- 10/29/2007 0.2500 -- -- 12/31/2007 0.2500 -- -- Special 12/31/2007 0.2310 0.0190 -- -------------------------------------------------------------------------------- $ 1.2310 $ 0.0190 $ 1.2500 $ -- ================================================================================ The following table summarizes the tax effects of the retention of capital gains for 2007: AMOUNT PER SHARE FORM 2439 -------------------------------------------------------------------------------- 2007 Gains Retained 0.1802 Line 1a Long - Term Gains Retained 0.1802 Taxes Paid 0.0631 Line 2* Basis Adjustment 0.1171 ** * If you are not subject to federal capital gains tax (e.g., charitable organizations, IRAs and Keogh Plans), you may be able to claim a refund by filing Form 990-T. ** For federal income tax purposes, you may increase the adjusted cost basis of your shares by this amount (the excess of Line 1a over Line 2). Qualified for Dividend Interest Earned on Annual Dividend Received Deduction*** Qualified Dividends**** U.S. Gov't. Obligations Amount Per Share Percent Amount Per Share Percent Amount Per Share Percent Amount Per Share --------------------------------------------------------------------------------------------------------- $1.25 14.2106% 0.1775 15.1898% 0.1897 0% 0.0000 ========================================================================================================= *** Not available to individual shareholders **** Qualified dividends are reported in Box 1b on IRS Form 1099-Div for 2007 -------------------------------------------------------------------------------- 6 MassMutual Participation Investors FINANCIAL REPORT Consolidated Statement of Assets and Liabilities.......................... 8 Consolidated Statement of Operations...................................... 9 Consolidated Statement of Cash Flows...................................... 10 Consolidated Statements of Changes in Net Assets.......................... 11 Consolidated Selected Financial Highlights................................ 12 Consolidated Schedule of Investments...................................... 13-34 Notes to Consolidated Financial Statements................................ 35-39 Report of Independent Registered Public Accounting Firm................... 40 Interested Trustees....................................................... 41-42 Independent Trustees...................................................... 43-45 Officers of the Trust..................................................... 46 -------------------------------------------------------------------------------- 7 MassMutual Participation Investors CONSOLIDATED STATEMENT OF ASSETS AND LIABILITIES December 31, 2007 ASSETS: Investments (See Consolidated Schedule of Investments) Corporate restricted securities at fair value (Cost - $98,834,452) $ 100,222,485 Corporate public securities at market value (Cost - $32,978,150) 32,092,037 Short-term securities at amortized cost 7,525,258 ------------- 139,839,780 ------------- Cash 1,029,074 Interest receivable 2,993,441 Receivable for investments sold 955,352 ------------- TOTAL ASSETS 144,817,647 ------------- LIABILITIES: Dividend payable 4,930,806 Investment advisory fee payable 284,907 Note payable 12,000,000 Interest payable 92,755 Accrued expenses 125,115 Accrued taxes payable 755,592 Other payables 3,138 ------------- TOTAL LIABILITIES 18,192,313 ------------- TOTAL NET ASSETS $ 126,625,334 ============= NET ASSETS: Common shares, par value $.01 per share; an unlimited number authorized $ 98,616 Additional paid-in capital 91,741,979 Retained net realized gain on investments, prior years 32,187,872 Undistributed net investment income 991,196 Accumulated net realized gain on investments 1,103,751 Net unrealized appreciation of investments 501,920 ------------- TOTAL NET ASSETS $ 126,625,334 ------------- COMMON SHARES ISSUED AND OUTSTANDING 9,861,611 ------------- NET ASSET VALUE PER SHARE $ 12.84 ============= SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -------------------------------------------------------------------------------- 8 MassMutual Participation Investors CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2007 INVESTMENT INCOME: Interest $ 12,735,335 Dividends 1,750,121 Other 60,406 ------------- TOTAL INVESTMENT INCOME 14,545,862 ------------- EXPENSES: Investment advisory fees 1,168,468 Interest 720,475 Professional fees 180,800 Trustees' fees and expenses 157,000 Reports to shareholders 110,000 Custodian fees 28,500 Transfer agent/registrar's expenses 20,000 Other 102,659 ------------- TOTAL EXPENSES 2,487,902 ------------- INVESTMENT INCOME - NET 12,057,960 -------------- NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain on investments before taxes 1,904,589 Income tax expense (720,563) ------------- NET REALIZED GAIN ON INVESTMENTS 1,184,026 ------------- Net change in unrealized appreciation of investments before taxes (2,028,367) Net change in deferred income tax expense 384,226 ------------- NET CHANGE IN UNREALIZED APPRECIATION OF INVESTMENTS (1,644,141) ------------- NET LOSS ON INVESTMENTS (460,115) ------------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 11,597,845 ============= SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -------------------------------------------------------------------------------- 9 MassMutual Participation Investors CONSOLIDATED STATEMENT OF CASH FLOWS For the year ended December 31, 2007 NET DECREASE IN CASH: Cash flows from operating activities: Purchases/Proceeds/Maturities from short-term portfolio securities, net $ (328,363) Purchases of portfolio securities (43,655,661) Proceeds from disposition of portfolio securities 45,755,626 Interest, dividends and other received 13,818,169 Interest expense paid (716,653) Operating expenses paid (1,782,528) Income taxes paid (3,540,046) ------------- NET CASH PROVIDED BY OPERATING ACTIVITIES 9,550,544 ------------- Cash flows from financing activities: Cash dividends paid from net investment income (11,896,704) Cash dividends paid from net realized gain on investments (96,562) Receipts for shares issued on reinvestment of dividends 828,061 ------------- NET CASH USED FOR FINANCING ACTIVITIES (11,165,205) ------------- NET DECREASE IN CASH (1,614,661) Cash - beginning of year 2,643,735 ------------- CASH - END OF YEAR $ 1,029,074 ------------- RECONCILIATION OF NET INCREASE IN NET ASSETS TO NET CASH PROVIDED BY OPERATING ACTIVITIES: NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 11,597,845 ------------- Decrease in investments 1,858,297 Decrease in interest and dividends receivable 7,385 Increase in receivable for investments sold (698,860) Increase in investment advisory fee payable 248 Increase in interest payable 3,822 Decrease in accrued expenses (17,622) Decrease in accrued taxes payable (3,203,709) Increase in other payables 3,138 ------------- TOTAL ADJUSTMENTS TO NET ASSETS FROM OPERATIONS (2,047,301) ------------- NET CASH PROVIDED BY OPERATING ACTIVITIES $ 9,550,544 ============= SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -------------------------------------------------------------------------------- 10 MassMutual Participation Investors CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS For the years ended December 31, 2007 and 2006 2007 2006 ------------ ------------ INCREASE IN NET ASSETS: OPERATIONS: Investment income - net $ 12,057,960 $ 10,728,662 Net realized gain on investments 1,184,026 6,733,116 Net change in unrealized appreciation of investments (1,644,141) 814,564 ------------ ------------ NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS 11,597,845 18,276,342 ------------ ------------ Increase from common shares issued on reinvestment of dividends Common shares issued (2007 - 56,329; 2006 - 61,052) 828,061 867,979 Dividends to shareholders from: Net investment income (2007 - $1.23 per share; 2006 - $1.18 per share) (12,127,939) (11,551,712) Net realized gains on investments (2007 - $0.02 per share; 2006 - $0.01 per share) (187,646) (96,562) ------------ ------------ TOTAL INCREASE IN NET ASSETS 110,321 7,496,047 ------------ ------------ NET ASSETS, BEGINNING OF YEAR 126,515,013 119,018,966 ------------ ------------ NET ASSETS, END OF YEAR (INCLUDING UNDISTRIBUTED NET INVESTMENT INCOME OF $991,196 AND $1,028,648, RESPECTIVELY) $126,625,334 $126,515,013 ============ ============ SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -------------------------------------------------------------------------------- 11 MassMutual Participation Investors CONSOLIDATED SELECTED FINANCIAL HIGHLIGHTS Selected data for each share of beneficial interest outstanding: For the years ended December 31, 2007 2006 2005 2004 2003 ----------------------------------------------------------------------------------------------------- NET ASSET VALUE: BEGINNING OF YEAR $ 12.90 $ 12.21 $ 11.13 $ 9.84 $ 8.78 Net investment income (a) 1.23 1.10 0.99 1.00 0.80 Net realized and unrealized gain (loss) on investments (0.05) 0.77 1.09(b) 1.36 1.21 TOTAL FROM INVESTMENT OPERATIONS 1.18 1.87 2.08 2.36 2.01 Dividends from net investment income to common shareholders (1.23) (1.18) (1.01) (1.10) (0.96) Dividends from net realized gain on investments to common shareholders (0.02) (0.01) -- -- -- Increase from dividends reinvested 0.01 0.01 0.01 0.03 0.01 ---------- ---------- ---------- ---------- ---------- TOTAL DIVIDENDS (1.24) (1.18) (1.00) (1.07) (0.95) ---------- ---------- ---------- ---------- ---------- NET ASSET VALUE: END OF YEAR $ 12.84 $ 12.90 $ 12.21 $ 11.13 $ 9.84 ---------- ---------- ---------- ---------- ---------- PER SHARE MARKET VALUE: END OF YEAR $ 13.18 $ 14.70 $ 14.05 $ 13.31 $ 11.65 ========== ========== ========== ========== ========== Total investment return Market value (1.30)% 16.81% 17.25% 25.77% 35.50% Net asset value (c) 9.95% 18.64% 22.51% 25.14% 23.72% Net assets (in millions): End of year $ 126.63 $ 126.52 $ 119.02 $ 107.61 $ 94.40 Ratio of operating expenses to average net assets 1.36% 1.17% 1.45% 1.63% 1.65% Ratio of interest expense to average net assets 0.56% 0.57% 0.80% 0.89% 0.97% Ratio of income tax expense to average net assets (d) 0.48% 2.68% 2.83% 0.16% -- Ratio of total expenses before custodian reduction to average net assets (d) 2.40% 4.46% 5.12% 2.68% 2.62% Ratio of net expenses after custodian reduction to average net assets (d) 2.40% 4.42% 5.08% 2.68% 2.62% Ratio of net investment income to average net assets 9.32% 8.43% 8.45% 9.60% 8.55% Portfolio turnover 33% 34% 32% 51% 55% (a) Calculated using average shares. (b) Amount includes $0.10 per share in litigation proceeds. (c) Net asset value return represents portfolio returns based on change in the Trust's net asset value assuming the reinvestment of all dividends and distributions which differs from the total investment return based on the Trust's market value due to the difference between the Trust's net asset value and the market value of its shares outstanding; past performance is no guarantee of future results. (d) As additional information, this ratio is included to reflect the taxes paid on retained long-term gains. These taxes paid are netted against realized capital gains in the Statement of Operations. The taxes paid are treated as deemed distributions and a credit for the taxes paid is passed on to shareholders. Senior securities: Total principal amount (in millions) $ 12 $ 12 $ 12 $ 22.5 $ 22.5 Asset coverage per $1,000 of indebtedness $ 11,552 $ 11,543 $ 10,918 $ 5,783 $ 5,195 SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -------------------------------------------------------------------------------- 12 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES - 79.16% (A) Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- PRIVATE PLACEMENT INVESTMENTS - 74.56% A H C HOLDING COMPANY, INC. A DESIGNER AND MANUFACTURER OF BOILERS AND WATER HEATERS FOR THE COMMERCIAL SECTOR. 15% Senior Subordinated Note due 2015 $ 1,230,991 11/21/07 $ 1,206,371 $ 1,223,203 Limited Partnership Interest (B) 7.93% int. 11/21/07 119,009 113,060 ------------- ------------- 1,325,380 1,336,263 ------------- ------------- A T I ACQUISITION COMPANY A FOR-PROFIT POST-SECONDARY SCHOOL SERVING STUDENTS IN TEXAS, FLORIDA AND ARIZONA. 12% Senior Subordinated Note due 2012 $ 1,125,000 04/08/04 1,125,000 1,125,000 Warrant, exercisable until 2012, to purchase preferred stock at $.01 per share (B) 7 shs. 11/16/07 -- 8,801 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 1,230 shs. 04/08/04 -- 10,848 ------------- ------------- 1,125,000 1,144,649 ------------- ------------- ADVANCED TECHNOLOGIES HOLDINGS A PROVIDER OF FACTORY MAINTENANCE SERVICES TO INDUSTRIAL COMPANIES. 15% Senior Subordinated Note due 2013 $ 1,080,000 12/27/07 1,058,400 1,080,418 Preferred Stock (B) 546 shs. 12/27/07 270,000 256,501 ------------- ------------- 1,328,400 1,336,919 ------------- ------------- AERO HOLDINGS, INC. A PROVIDER OF GEOSPATIAL SERVICES TO CORPORATE AND GOVERNMENT CLIENTS. 10.5% Senior Secured Term Note due 2014 $ 930,000 03/09/07 916,050 925,619 14% Senior Subordinated Note due 2015 $ 720,000 03/09/07 645,918 716,335 Common Stock (B) 150,000 shs. 03/09/07 150,000 142,500 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 37,780 shs. 03/09/07 63,730 378 ------------- ------------- 1,775,698 1,784,832 ------------- ------------- AMERICAN HOSPICE MANAGEMENT HOLDING LLC A FOR-PROFIT HOSPICE CARE PROVIDER IN THE UNITED STATES. 12% Senior Subordinated Note due 2010 $ 1,125,000 01/22/04 1,046,517 1,081,718 Preferred Class A Unit (B) 1,706 uts. * 170,600 59,710 Common Class B Unit (B) 16,100 uts. 01/22/04 1 161 Common Class D Unit (B) 3,690 uts. 09/12/06 -- 37 ------------- ------------- *01/22/04 and 09/12/06. 1,217,118 1,141,626 ------------- ------------- ARROW TRU-LINE HOLDINGS, INC. A MANUFACTURER OF HARDWARE FOR RESIDENTIAL AND COMMERCIAL OVERHEAD GARAGE DOORS IN NORTH AMERICA. 12% Senior Subordinated Note due 2012 $ 861,702 05/18/05 818,433 823,981 Common Stock (B) 263 shs. 05/18/05 263,298 47,690 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 69 shs. 05/18/05 59,362 12,503 ------------- ------------- 1,141,093 884,174 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 13 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- AUGUSTA SPORTSWEAR HOLDING CO. A MANUFACTURER AND DISTRIBUTOR OF ATHLETIC APPAREL, ACTIVEWEAR AND TEAM UNIFORMS. 12% Senior Subordinated Note due 2012 $ 893,000 12/31/04 $ 846,053 $ 893,000 Common Stock (B) 275 shs. * 275,108 1,039,145 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 73 shs. 12/31/04 63,254 274,942 ------------- ------------- *12/31/04, 03/31/05 and 05/02/06. 1,184,415 2,207,087 ------------- ------------- BRAVO SPORTS HOLDING CORPORATION A DESIGNER AND MARKETER OF NICHE BRANDED CONSUMER PRODUCTS INCLUDING CANOPIES, TRAMPOLINES, IN-LINE SKATES, SKATEBOARDS, AND URETHANE WHEELS. 12.5% Senior Subordinated Note due 2014 $ 1,207,902 06/30/06 1,140,670 1,222,791 Preferred Stock Class A (B) 465 shs. 06/30/06 141,946 131,814 Common Stock (B) 1 sh. 06/30/06 152 26,037 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 164 shs. 06/30/06 48,760 46,325 ------------- ------------- 1,331,528 1,426,967 ------------- ------------- CAPESUCCESS LLC A PROVIDER OF DIVERSIFIED STAFFING SERVICES. Preferred Membership Interests (B) 806 uts. 04/29/00 3,598 180 Common Membership Interests (B) 10,421 uts. 04/29/00 46,706 2,332 ------------- ------------- 50,304 2,512 ------------- ------------- CAPITAL SPECIALTY PLASTICS, INC. A PRODUCER OF DESICCANT STRIPS USED FOR PACKAGING PHARMACEUTICAL PRODUCTS. Common Stock (B) 55 shs. * 252 279,466 ------------- ------------- *12/30/97 and 05/29/99. COEUR, INC. A PRODUCER OF PROPRIETARY, DISPOSABLE POWER INJECTION SYRINGES. 8.75% Senior Secured Term Note due 2010 $ 202,899 04/30/03 202,899 204,996 11.5% Senior Subordinated Note due 2011 $ 242,754 04/30/03 230,003 243,545 Common Stock (B) 72,464 shs. 04/30/03 72,463 208,588 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 50,099 shs. 04/30/03 23,317 144,210 ------------- ------------- 528,682 801,339 ------------- ------------- CONNECTICUT ELECTRIC, INC. A SUPPLIER AND DISTRIBUTOR OF ELECTRICAL PRODUCTS SOLD INTO THE RETAIL AND WHOLESALE MARKETS. 12% Senior Subordinated Note due 2014 $ 1,267,387 01/12/07 1,182,283 1,215,226 Limited Liability Company Unit Class A (B) 82,613 uts. 01/12/07 82,613 78,482 Limited Liability Company Unit Class C (B) 59,756 uts. 01/12/07 59,756 56,769 ------------- ------------- 1,324,652 1,350,477 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 14 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- CONNOR SPORT COURT INTERNATIONAL, INC. A DESIGNER AND MANUFACTURER OF OUTDOOR AND INDOOR SYNTHETIC SPORTS FLOORING AND OTHER TEMPORARY FLOORING PRODUCTS. Preferred Stock Series B-2 (B) 9,081 shs. 07/05/07 $ 370,795 $ 403,296 Preferred Stock Series C 3,781 shs. 07/05/07 158,913 126,409 Common Stock (B) 380 shs. 07/05/07 18,333 4 Limited Partnership Interest (B) 4.43% int. * 103,135 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 92 shs. ** 84,829 -- ------------- ------------- *08/12/04 and 01/14/05. **08/12/04 and 01/18/05. 736,005 529,709 ------------- ------------- CONSOLIDATED FOUNDRIES HOLDINGS A MANUFACTURER OF ENGINEERED CAST METAL COMPONENTS FOR THE GLOBAL AEROSPACE AND DEFENSE INDUSTRIES. 12% Senior Subordinated Note due 2013 $ 1,157,143 06/15/05 1,115,385 1,168,714 Common Stock (B) 269 shs. * 278,521 762,586 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 54 shs. 06/15/05 53,295 154,233 ------------- ------------- *06/15/05 and 05/22/06. 1,447,201 2,085,533 ------------- ------------- COREPHARMA LLC A MANUFACTURER OF ORAL DOSE GENERIC PHARMACEUTICALS TARGETED AT NICHE APPLICATIONS. 12% Senior Subordinated Note due 2013 $ 1,350,000 08/04/05 1,290,633 1,356,750 Warrant, exercisable until 2013, to purchase common stock at $.001 per share (B) 10 shs. 08/04/05 72,617 57,870 ------------- ------------- 1,363,250 1,414,620 ------------- ------------- DAVIS-STANDARD LLC A MANUFACTURER, ASSEMBLER, AND INSTALLER OF A BROAD RANGE OF CAPITAL EQUIPMENT THAT IS USED IN THE EXTRUSION, CONVERSION, AND PROCESSING OF PLASTIC MATERIALS. 12% Senior Subordinated Note due 2014 $ 978,261 10/30/06 918,656 1,017,391 Limited Partnership Interest (B) 0.97% int. 10/30/06 371,739 846,233 Warrant, exercisable until 2014, to purchase preferred stock at $.01 per share (B) 26 shs. 10/30/06 26,380 29,018 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 18 shs. 10/30/06 18,000 92,437 ------------- ------------- 1,334,775 1,985,079 ------------- ------------- DIRECTED ELECTRONICS, INC. A DESIGNER AND DISTRIBUTOR OF BRAND NAME AUTOMOTIVE SECURITY SYSTEMS, AUDIO PRODUCTS AND INSTALLATION ACCESSORIES. Common Stock (B) 195,118 shs. * 982,868 323,896 ------------- ------------- *12/19/05 and 06/17/06. DIVERSCO, INC./DHI HOLDINGS, INC. A CONTRACT PROVIDER OF JANITORIAL AND EQUIPMENT MAINTENANCE SERVICES AND TEMPORARY PRODUCTION LABOR TO INDUSTRIAL CUSTOMERS. Membership Interests of MM/Lincap Diversco Investments Ltd. LLC (B) 13.57% int. 08/27/98 366,495 -- Preferred Stock (B) 1,639 shs. 12/14/01 1,392,067 -- Warrants, exercisable until 2011, to purchase common stock of DHI Holdings, Inc. at $.01 per share (B) 6,676 shs. * 201,655 -- ------------- ------------- *10/24/96 and 08/28/98. 1,960,217 -- ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 15 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- DUNCAN SYSTEMS, INC. A DISTRIBUTOR OF WINDSHIELDS AND SIDE GLASS FOR THE RECREATIONAL VEHICLE MARKET. 10% Senior Secured Term Note due 2013 $ 308,571 11/01/06 $ 303,942 $ 307,084 13% Senior Subordinated Note due 2014 $ 488,572 11/01/06 438,009 485,689 Common Stock (B) 102,857 shs. 11/01/06 102,857 154,873 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 32,294 shs. 11/01/06 44,663 48,626 ------------- ------------- 889,471 996,272 ------------- ------------- DWYER GROUP, INC. A FRANCHISER OF A VARIETY OF HOME REPAIR SERVICES. Common Stock (B) 3,656 shs. * 365,600 560,855 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,077 shs. 10/30/03 98,719 165,159 ------------- ------------- *10/30/03 and 01/02/04. 464,319 726,014 ------------- ------------- E X C ACQUISITION CORPORATION A MANUFACTURER OF PRE-FILLED SYRINGES AND PUMP SYSTEMS USED FOR INTRAVENOUS DRUG DELIVERY. Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 11 shs. 06/28/04 40,875 97,932 ------------- ------------- ELECTRA BICYCLE COMPANY LLC A DESIGNER AND MARKETER OF BRANDED LEISURE BICYCLES. 10.5% Senior Secured Term Note A due 2009 $ 72,875 04/12/07 71,417 72,516 10.5% Senior Secured Term Note B due 2012 $ 404,453 04/12/07 397,519 400,789 12% Senior Secured Term Note C due 2012 $ 291,498 04/12/07 271,410 286,489 Limited Liability Company Unit Series F 36,913 uts. 04/12/07 36,913 35,068 Limited Liability Company Unit Series G (B) 2,852 uts. 04/12/07 2,852 2,709 ------------- ------------- 780,111 797,571 ------------- ------------- ENZYMATIC THERAPY, INC. A MANUFACTURER AND DISTRIBUTOR OF BRANDED NATURAL MEDICINES AND NUTRITIONAL SUPPLEMENTS. Limited Partnership Interest (B) 0.70% int. 03/30/00 281,250 72,070 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 15,415 shs. 03/30/00 135,000 45,233 ------------- ------------- 416,250 117,303 ------------- ------------- EVANS CONSOLES, INC. A DESIGNER AND MANUFACTURER OF CONSOLES AND CONTROL CENTER SYSTEMS. Common Stock 45,000 shs. 05/06/04 6 534,195 ------------- ------------- F H S HOLDINGS LLC A NATIONAL PROVIDER OF CUSTOMIZED DISEASE MANAGEMENT SERVICES TO LARGE SELF-INSURED EMPLOYERS. 12% Senior Subordinated Note due 2014 $ 1,265,625 06/01/06 1,184,234 1,274,077 Preferred Unit (B) 84 uts. 06/01/06 83,524 83,530 Common Unit (B) 844 uts. 06/01/06 844 73,097 Common Unit Class B (B) 734 uts. 06/01/06 64,779 63,548 ------------- ------------- 1,333,381 1,494,252 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 16 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- FLUTES, INC. AN INDEPENDENT MANUFACTURER OF MICRO FLUTED CORRUGATED SHEET MATERIAL FOR THE FOOD AND CONSUMER PRODUCTS PACKAGING INDUSTRIES. 10% Senior Secured Term Note due 2013 $ 524,791 04/13/06 $ 516,919 $ 524,368 14% Senior Subordinated Note due 2014 $ 317,177 04/13/06 286,706 317,307 Common Stock (B) 62,535 shs. 04/13/06 62,535 29,025 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 17,680 shs. 04/13/06 27,676 8,206 ------------- ------------- 893,836 878,906 ------------- ------------- FOWLER HOLDING, INC. A PROVIDER OF SITE DEVELOPMENT SERVICES TO RESIDENTIAL HOMEBUILDERS AND DEVELOPERS IN THE RALEIGH/DURHAM REGION OF NORTH CAROLINA. 12% Senior Subordinated Note due 2013 $ 1,252,174 02/03/06 1,143,612 1,207,433 Common Stock (B) 98 shs. 02/03/06 97,826 56,794 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 135 shs. 02/03/06 110,348 78,129 ------------- ------------- 1,351,786 1,342,356 ------------- ------------- FUEL SYSTEMS HOLDING CORPORATION AN INDEPENDENT NORTH AMERICAN SUPPLIER OF FUEL TANKS FOR A WIDE VARIETY OF COMMERCIAL VEHICLES. 12% Senior Subordinated Note due 2014 $ 1,237,500 01/31/06 1,159,203 1,146,751 Common Stock (B) 112,500 shs. 01/31/06 112,500 22,500 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 73,275 shs. 01/31/06 63,113 14,655 ------------- ------------- 1,334,816 1,183,906 ------------- ------------- GOLDEN COUNTRY FOODS HOLDING, INC. A MANUFACTURER OF FROZEN APPETIZERS AND SNACKS. 12% Senior Subordinated Note due 2015 $ 1,012,500 11/01/07 914,607 1,005,457 8% Series A Convertible, cumulative Preferred Stock, convertible into 4.25% of the fully diluted common shares 77,643 shs. 11/01/07 77,643 73,761 ------------- ------------- 992,250 1,079,218 ------------- ------------- H M HOLDING COMPANY A DESIGNER, MANUFACTURER, AND IMPORTER OF PROMOTIONAL AND WOOD FURNITURE. 12% Senior Subordinated Note due 2013 $ 1,170,000 02/10/06 1,084,725 585,000 Preferred Stock (B) 11 shs. 09/18/07 10,714 -- Common Stock (B) 180 shs. 02/10/06 180,000 -- Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 67 shs. 02/10/06 61,875 -- ------------- ------------- 1,337,314 585,000 ------------- ------------- HIGHGATE CAPITAL LLC AN ACQUIRER OF CONTROLLING OR SUBSTANTIAL INTERESTS IN MANUFACTURING AND MARKETING ENTITIES. Series A Preferred Units (B) 0.30% int. 07/21/94 91,867 -- ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 17 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- HOME DECOR HOLDING COMPANY A DESIGNER, MANUFACTURER AND MARKETER OF FRAMED ART AND WALL DECOR PRODUCTS. 12.5% Senior Subordinated Note due 2012 $ 1,081,731 * $ 1,002,911 $ 1,086,480 Common Stock (B) 33 shs. * 33,216 39,838 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 106 shs. * 105,618 126,661 ------------- ------------- *06/30/04 and 08/19/04. 1,141,745 1,252,979 ------------- ------------- INSURANCE CLAIMS MANAGEMENT, INC. A THIRD PARTY ADMINISTRATOR PROVIDING AUTO AND PROPERTY CLAIM ADMINISTRATION SERVICES FOR INSURANCE COMPANIES. Common Stock 37 shs. 02/27/07 1,100 -- Warrant, exercisable until 2011, to purchase common stock at $.01 per share 11 shs. 02/27/07 324 -- ------------- ------------- 1,424 -- ------------- ------------- INTEGRATION TECHNOLOGY SYSTEMS, INC. A MANUFACTURER OF STEEL PROTECTIVE COMPUTER AND NETWORK SYSTEMS FOR THE INDUSTRIAL AND OFFICE ENVIRONMENTS. 12% Senior Secured Note due 2008 (D) $ 25,055 03/01/04 1 -- Common Stock (B) 130 shs. 06/01/00 149,500 -- ------------- ------------- 149,501 -- ------------- ------------- JASON, INC. A DIVERSIFIED MANUFACTURING COMPANY SERVING VARIOUS INDUSTRIAL MARKETS. 13% Senior Subordinated Note due 2010 $ 510,187 08/04/00 483,194 501,545 Limited Partnership Interest of Saw Mill Capital Fund II, L.P. (B) 1.30% int. 08/03/00 469,245 424,886 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 26,931 shs. 08/04/00 61,101 85,329 ------------- ------------- 1,013,540 1,011,760 ------------- ------------- JUSTRITE MANUFACTURING ACQUISITION CO. A MANUFACTURER OF SAFETY PRODUCTS SUCH AS STORAGE CABINETS AND CONTAINERS. 12% Senior Subordinated Note due 2011 $ 843,750 12/15/04 806,517 852,188 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 594 shs. 12/15/04 53,528 131,999 ------------- ------------- 860,045 984,187 ------------- ------------- K H O F HOLDINGS, INC. A MANUFACTURER OF PREMIUM DISPOSABLE TABLEWARE PRODUCTS SERVING BOTH THE FOODSERVICE AND CONSUMER CHANNELS. 14% Senior Subordinated Note due 2014 $ 1,233,173 10/15/07 1,208,510 1,234,184 Common Stock (B) 116,827 shs. 10/15/07 116,827 110,986 ------------- ------------- 1,325,337 1,345,170 ------------- ------------- K N B HOLDINGS CORPORATION A DESIGNER, MANUFACTURER AND MARKETER OF PRODUCTS FOR THE CUSTOM FRAMING MARKET. 13.5% Senior Subordinated Note due 2013 $ 1,305,062 05/25/06 1,247,285 1,318,375 Common Stock (B) 71,053 shs. 05/25/06 71,053 67,557 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 43,600 shs. 05/25/06 37,871 41,455 ------------- ------------- 1,356,209 1,427,387 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 18 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- K W P I HOLDINGS CORPORATION A MANUFACTURER AND DISTRIBUTOR OF VINYL WINDOWS AND PATIO DOORS THROUGHOUT THE NORTHWESTERN UNITED STATES. 12% Senior Subordinated Note due 2014 $ 1,227,000 03/14/07 $ 1,123,038 $ 1,204,110 Common Stock (B) 123 shs. 03/13/07 123,000 116,850 Warrant, exercisable until 2017, to purchase common stock at $.01 per share (B) 89 shs. 03/14/07 85,890 1 ------------- ------------- 1,331,928 1,320,961 ------------- ------------- K-TEK HOLDING CORPORATION A MANUFACTURER OF INSTRUMENTATION FOR LIQUID AND BULK SOLIDS LEVEL DETECTION FOR PROCESS AND STORAGE TANKS. 14% Senior Secured Tranche B Note due 2015 $ 1,157,143 12/20/07 1,136,314 1,148,981 Preferred Stock (B) 192,314 shs. 12/20/07 192,314 182,698 Common Stock (B) 54,326 shs. 12/20/07 543 543 ------------- ------------- 1,329,171 1,332,222 ------------- ------------- MAGNATECH INTERNATIONAL, INC. A SUPPLIER OF PROCESS EQUIPMENT AND RELATED PARTS USED IN THE MANUFACTURING OF MEDIUM AND HIGH-PRESSURE REINFORCED HOSES. 12% Senior Subordinated Note due 2014 $ 618,750 04/05/06 578,768 626,014 13% Preferred Stock (B) 299 shs. 04/05/06 299,295 338,209 Common Stock (B) 66 shs. 04/05/06 66,202 217,095 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 7 shs. 04/05/06 6,832 22,398 ------------- ------------- 951,097 1,203,716 ------------- ------------- MAIL COMMUNICATIONS GROUP, INC. A PROVIDER OF MAIL PROCESSING AND HANDLING SERVICES, LETTERSHOP SERVICES, AND COMMERCIAL PRINTING SERVICES. 12.5% Senior Subordinated Note due 2014 $ 516,177 05/04/07 483,072 513,746 Limited Liability Company Unit (B) 12,176 uts. 05/04/07 158,824 150,883 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 1,787 shs. 05/04/07 22,781 18 ------------- ------------- 664,677 664,647 ------------- ------------- MAVERICK ACQUISITION COMPANY A MANUFACTURER OF CAPSULES THAT COVER THE CORK AND NECK OF WINE BOTTLES. 9.73% Senior Secured Tranche A Note due 2010 (C) $ 286,891 09/03/04 286,891 285,982 12% Senior Secured Tranche B Note due 2011 $ 179,104 09/03/04 164,308 176,380 Limited Partnership Interest (B) 4.48% int. 09/03/04 33,582 22,960 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 243 shs. 09/03/04 22,556 16,589 ------------- ------------- 507,337 501,911 ------------- ------------- MICROGROUP, INC. A MANUFACTURER OF PRECISION PARTS AND ASSEMBLIES, AND A VALUE-ADDED SUPPLIER OF METAL TUBING AND BARS. 12% Senior Subordinated Note due 2013 $ 1,421,795 * 1,345,547 1,421,234 Common Stock (B) 238 shs. * 238,000 159,028 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 87 shs. * 86,281 58,005 ------------- ------------- *08/12/05 and 09/11/06. 1,669,828 1,638,267 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 19 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- MOMENTUM HOLDING CO. A DESIGNER AND SUPPLIER OF UPHOLSTERY FABRIC TO COMMERCIAL FURNITURE MANUFACTURERS AND ARCHITECTURAL AND DESIGN FIRMS. 12% Senior Subordinated Note due 2014 $ 618,802 08/04/06 $ 555,603 $ 631,178 Limited Partnership Interest (B) 11.24% int. 08/04/06 56,198 87,773 Warrant, exercisable until 2014, to purchase common stock at $.02 per share (B) 586 shs. 08/04/06 56,705 91,494 ------------- ------------- 668,506 810,445 ------------- ------------- MONESSEN HOLDING CORPORATION A DESIGNER AND MANUFACTURER OF A BROAD LINE OF GAS, WOOD, AND ELECTRIC HEARTH PRODUCTS AND ACCESSORIES. 12% Senior Subordinated Note due 2014 $ 1,350,000 03/31/06 1,259,338 1,280,787 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 81 shs. 03/31/06 73,125 1 ------------- ------------- 1,332,463 1,280,788 ------------- ------------- MORTON INDUSTRIAL GROUP, INC. A MANUFACTURER OF HIGHLY ENGINEERED METAL FABRICATED COMPONENTS. 12% Senior Subordinated Note due 2014 $ 1,292,246 08/25/06 1,194,861 1,190,012 Common Stock (B) 57,754 shs. 08/25/06 57,754 -- Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 91,923 shs. 08/25/06 79,380 -- ------------- ------------- 1,331,995 1,190,012 ------------- ------------- MOSS, INC. A MANUFACTURER AND DISTRIBUTOR OF LARGE DISPLAY AND EXHIBIT STRUCTURES. Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 19.20% int. * 199,301 344,456 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 122 shs. 12/21/05 20,941 21,088 ------------- ------------- *09/20/00, 05/23/02 and 02/21/07. 220,242 365,544 ------------- ------------- NABCO, INC. A PRODUCER OF EXPLOSIVE CONTAINMENT VESSELS IN THE UNITED STATES. 14% Senior Subordinated Note due 2014 $ 352,389 02/24/06 326,397 176,195 Limited Liability Company Unit (B) 437 uts. * 436,984 -- Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 26 shs. 02/24/06 19,687 -- ------------- ------------- *02/24/06 and 06/22/07. 783,068 176,195 ------------- ------------- NAVIS GLOBAL A DESIGNER, MANUFACTURER, SELLER AND SERVICER OF FINISHING MACHINERY FOR THE KNIT AND WOVEN SEGMENTS OF THE GLOBAL TEXTILE INDUSTRY. 12% Senior Subordinated Note due 2014 $ 705,457 05/28/04 650,065 695,800 8.75% Senior Secured Note due 2011 $ 327,497 05/28/04 327,497 326,259 Common Stock (B) 385,233 shs. 05/28/04 385,233 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 116,521 shs. 05/28/04 74,736 -- ------------- ------------- 1,437,531 1,022,059 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 20 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- NESCO HOLDINGS CORPORATION A SALES AND LEASING COMPANY THAT PROVIDES EQUIPMENT TO THE ELECTRIC UTILITY, TELECOMMUNICATIONS, AND VARIOUS OTHER INDUSTRIES. 12% Senior Subordinated Note due 2015 $ 1,125,000 08/02/07 $ 999,658 $ 1,117,327 Common Stock (B) 225,000 shs. 08/02/07 225,000 213,750 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 63,191 shs. 08/02/07 102,842 632 ------------- ------------- 1,327,500 1,331,709 ------------- ------------- NETSHAPE TECHNOLOGIES, INC. A MANUFACTURER OF POWDER METAL AND METAL INJECTION MOLDED PRECISION COMPONENTS USED IN INDUSTRIAL, CONSUMER, AND OTHER APPLICATIONS. 12% Senior Subordinated Note due 2014 $ 810,000 02/02/07 745,713 754,623 Limited Partnership Interest of Saw Mill PCG Partners LLC (B) 540 uts. 02/01/07 540,000 486,000 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 48 shs. 02/02/07 48,087 -- ------------- ------------- 1,333,800 1,240,623 ------------- ------------- NONNI'S FOOD COMPANY A PRODUCER AND DISTRIBUTOR OF PREMIUM BISCOTTI AND BAGEL CHIPS IN NORTH AMERICA. 12.25% Senior Subordinated Note due 2012 $ 986,538 03/29/04 982,661 1,002,784 10% Preferred Stock (B) 135 shs. 03/29/04 135,044 137,123 Common Stock (B) 3,418 shs. 03/29/04 3,418 141,285 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 4,565 shs. 03/29/04 3,877 188,683 ------------- ------------- 1,125,000 1,469,875 ------------- ------------- NYLONCRAFT, INC. A SUPPLIER OF ENGINEERED PLASTIC COMPONENTS FOR THE AUTOMOTIVE INDUSTRY. 9% Senior Secured Note due 2009 $ 464,286 01/28/02 464,286 441,072 11.5% Senior Subordinated Note due 2012 $ 857,143 01/28/02 808,625 642,857 Common Stock (B) 178,571 shs. 01/28/02 178,571 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 138,928 shs. 01/28/02 92,597 -- ------------- ------------- 1,544,079 1,083,929 ------------- ------------- OAKRIVER TECHNOLOGY, INC. DESIGNS, ENGINEERS AND ASSEMBLES HIGH PRECISION AUTOMATED PROCESS EQUIPMENT FOR THE MEDICAL DEVICE INDUSTRY, WITH A FOCUS ON DEFIBRILLATORS AND STENTS. 10% Senior Secured Note due 2012 $ 323,115 01/03/06 318,268 322,647 13% Senior Subordinated Note due 2013 $ 392,709 01/03/06 354,816 392,407 Common Stock (B) 184,176 shs. 01/03/06 184,176 117,607 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 43,073 shs. 01/03/06 35,900 27,505 ------------- ------------- 893,160 860,166 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 21 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- OLYMPIC SALES, INC. A BOAT RETAILER IN WASHINGTON STATE, OREGON, CALIFORNIA AND BRITISH COLUMBIA. 12% Senior Subordinated Note due 2008 $ 511,000 08/07/98 $ 511,000 $ 504,437 12% Senior Subordinated Note due 2008 $ 244,154 02/09/00 242,972 243,442 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. 10.66% int. * 808,386 -- Warrants, exercisable until 2008, to purchase common stock at $.01 per share (B) 15,166 shs. ** 206,041 -- ------------- ------------- *08/07/98, 02/23/99, 12/22/99 and 02/25/03. **08/07/98 and 02/29/00. 1,768,399 747,879 ------------- ------------- ONTARIO DRIVE & GEAR LTD. A MANUFACTURER OF ALL-WHEEL DRIVE, OFF-ROAD AMPHIBIOUS VEHICLES AND RELATED ACCESSORIES. 13% Senior Subordinated Note due 2013 $ 1,047,115 01/17/06 955,158 1,047,115 Limited Liability Company Unit (B) 1,942 uts. 01/17/06 302,885 674,426 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 328 shs. 01/17/06 90,424 113,868 ------------- ------------- 1,348,467 1,835,409 ------------- ------------- P A S HOLDCO LLC AN INDEPENDENT PROVIDER OF MAINTENANCE, REPAIR AND OVERHAUL SERVICES TO THE AEROSPACE GAS TURBINE ENGINE AND AIRFRAME MARKETS. 14% Senior Subordinated Note due 2014 $ 1,176,469 07/03/06 1,121,168 1,199,999 Preferred Unit (B) 202 uts. 07/03/06 202,320 226,598 Preferred Unit (B) 36 uts. 07/03/06 36,420 40,790 Common Unit Class I (B) 78 uts. 07/03/06 -- 91,998 Common Unit Class L (B) 17 uts. 07/03/06 -- 19,435 ------------- ------------- 1,359,908 1,578,820 ------------- ------------- P I I HOLDING CORPORATION A MANUFACTURER OF PLASTIC FILM AND BAGS FOR THE GENERAL INDUSTRIAL, MEDICAL, AND FOOD INDUSTRIES. 12% Senior Subordinated Note due 2013 $ 1,215,000 03/31/06 1,142,340 1,239,300 Preferred Stock (B) 19 shs. 03/31/06 174,492 201,294 Common Stock (B) 12 shs. 03/31/06 13,500 25,537 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 7 shs. 03/31/06 5,888 14,860 ------------- ------------- 1,336,220 1,480,991 ------------- ------------- PACIFIC CONSOLIDATED HOLDINGS LLC A MANUFACTURER OF RUGGED, MOBILE LIQUID AND GASEOUS OXYGEN AND NITROGEN GENERATING SYSTEMS USED IN THE GLOBAL DEFENSE, OIL & GAS AND MEDICAL SECTORS. 12% Senior Subordinated Note due 2012 $ 690,683 04/27/07 632,752 672,740 Limited Liability Company Unit (B) 928,962 uts. 04/27/07 33,477 31,771 ------------- ------------- 666,229 704,511 ------------- ------------- PARADIGM PACKAGING, INC. A MANUFACTURER OF PLASTIC BOTTLES AND CLOSURES FOR THE NUTRITIONAL, PHARMACEUTICAL, PERSONAL CARE AND FOOD PACKAGING MARKETS. 12% Senior Subordinated Note due 2008 $ 1,125,000 12/19/00 1,097,731 1,123,650 Membership Interests of MM/Lincap PPI Investments, Inc., LLC (B) 1.28% int. 12/21/00 140,625 155,239 ------------- ------------- 1,238,356 1,278,889 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 22 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- POSTLE ALUMINUM COMPANY LLC A MANUFACTURER AND DISTRIBUTOR OF ALUMINUM EXTRUDED PRODUCTS. 12% Senior Subordinated Note due 2014 $ 1,080,000 10/02/06 $ 1,004,058 $ 1,103,884 Limited Liability Company Unit (B) 733 uts. 10/02/06 270,000 271,022 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 182 shs. 10/02/06 65,988 67,408 ------------- ------------- 1,340,046 1,442,314 ------------- ------------- PROTEIN GENETICS, INC. A PRODUCER OF BOVINE ARTIFICIAL INSEMINATION PRODUCTS, RELATED BREEDING AND HEALTHCARE PRODUCTS AND SPECIALTY GENETICS SOLD TO THE DAIRY AND BEEF INDUSTRIES. 9.8% Redeemable Exchangeable Preferred Stock (B) 332 shs. 08/12/94 33,217 -- Common Stock (B) 867 shs. * 42,365 -- ------------- ------------- *08/12/94 and 11/14/01. 75,582 -- ------------- ------------- QUALIS AUTOMOTIVE LLC A DISTRIBUTOR OF AFTERMARKET AUTOMOTIVE BRAKE AND CHASSIS PRODUCTS. 12% Senior Subordinated Note due 2012 $ 937,500 05/28/04 809,820 921,930 Common Stock 187,500 shs. 05/28/04 187,500 68,110 Warrant, exercisable until 2012, to purchase common stock at $.01 per share 199,969 shs. 05/28/04 199,969 72,639 ------------- ------------- 1,197,289 1,062,679 ------------- ------------- QUALSERV CORPORATION A PROVIDER OF FOODSERVICE EQUIPMENT AND SUPPLIES TO MAJOR RESTAURANT CHAINS AND THEIR FRANCHISEES. Limited Partnership Interest (B) 4.90% int. 07/09/04 1 -- ------------- ------------- R A J MANUFACTURING HOLDINGS LLC A DESIGNER AND MANUFACTURER OF WOMEN'S SWIMWEAR SOLD UNDER A VARIETY OF LICENSED BRAND NAMES. 12.5% Senior Subordinated Note due 2014 $ 1,200,277 12/15/06 1,106,662 1,224,283 Limited Liability Company Unit (B) 1,497 uts. 12/15/06 149,723 161,538 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 2 shs. 12/15/06 69,609 76,229 ------------- ------------- 1,325,994 1,462,050 ------------- ------------- RADIAC ABRASIVES, INC. A MANUFACTURER OF BONDED ABRASIVE AND SUPER ABRASIVE GRINDING WHEELS IN THE UNITED STATES. 12% Senior Subordinated Note due 2014 $ 1,196,809 02/10/06 1,119,163 1,232,713 Common Stock (B) 153,191 shs. 02/10/06 153,191 187,207 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 69,647 shs. 02/10/06 63,421 85,112 ------------- ------------- 1,335,775 1,505,032 ------------- ------------- ROYAL BATHS MANUFACTURING COMPANY A MANUFACTURER AND DISTRIBUTOR OF ACRYLIC AND CULTURED MARBLE BATHROOM PRODUCTS. 12.5% Senior Subordinated Note due 2011 $ 562,500 11/14/03 522,278 567,966 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 74 shs. 11/14/03 65,089 84,722 ------------- ------------- 587,367 652,688 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 23 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- SAFETY SPEED CUT MANUFACTURING COMPANY, INC. A MANUFACTURER OF VERTICAL PANEL SAWS AND ROUTERS FOR THE WOOD WORKING INDUSTRY. Class B Common Stock (B) 846 shs. 06/02/99 $ 146,456 $ 736,270 ------------- ------------- SAVAGE SPORTS HOLDING, INC. A MANUFACTURER OF SPORTING FIREARMS. 12% Senior Subordinated Note due 2012 $ 814,655 09/10/04 771,030 830,948 Common Stock (B) 324 shs. * 340,378 623,194 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 71 shs. 09/10/04 60,129 136,064 ------------- ------------- *09/10/04 and 10/05/07. 1,171,537 1,590,206 ------------- ------------- SMART SOURCE HOLDINGS LLC A SHORT-TERM COMPUTER RENTAL COMPANY. 12% Senior Subordinated Note due 2015 $ 1,038,462 08/31/07 943,515 1,033,872 Limited Liability Company Unit (B) 312 uts. 08/31/07 311,538 295,963 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 76 shs. 08/31/07 76,154 1 ------------- ------------- 1,331,207 1,329,836 ------------- ------------- SPECIALTY FOODS GROUP, INC. A MANUFACTURER AND DISTRIBUTOR OF BRANDED MEAT PRODUCTS. Limited Partnership Interest of MHD Holdings LLC 0.76% int. 08/29/00 363,576 -- ------------- ------------- STANTON CARPET HOLDING CO. A DESIGNER AND MARKETER OF HIGH AND MID-PRICED DECORATIVE CARPETS AND RUGS. 12.13% Senior Subordinated Note due 2014 $ 1,185,366 08/01/06 1,117,440 1,193,510 Common Stock (B) 165 shs. 08/01/06 164,634 197,621 Warrant, exercisable until 2014, to purchase common stock at $.02 per share (B) 55 shs. 08/01/06 49,390 65,818 ------------- ------------- 1,331,464 1,456,949 ------------- ------------- STRATEGIC EQUIPMENT & SUPPLY CORPORATION, INC. A PROVIDER OF KITCHEN AND RESTAURANT DESIGN, EQUIPMENT FABRICATION AND INSTALLATION SERVICES. Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 61,862 shs. 01/14/00 382,501 -- ------------- ------------- SYNVENTIVE EQUITY LLC A MANUFACTURER OF HOT RUNNER SYSTEMS USED IN THE PLASTIC INJECTION MOLDING PROCESS. Limited Liability Company Unit (B) 150,000 uts. 08/20/03 33,462 7,465 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 45,942 shs. 08/21/03 10,249 10,249 ------------- ------------- 43,711 17,714 ------------- ------------- TANGENT RAIL CORPORATION A MANUFACTURER OF RAIL TIES AND PROVIDES SPECIALTY SERVICES TO THE NORTH AMERICAN RAILROAD INDUSTRY. 13% Senior Subordinated Note due 2013 $ 1,173,909 10/14/05 1,023,086 1,173,909 Common Stock (B) 1,167 shs. 10/14/05 1,167 502,946 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 618 shs. 10/14/05 155,860 266,342 ------------- ------------- 1,180,113 1,943,197 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 24 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- TERRA RENEWAL SERVICES, INC. A PROVIDER OF WASTEWATER RESIDUAL MANAGEMENT AND REQUIRED ENVIRONMENTAL REPORTING, PERMITTING, NUTRIENT MANAGEMENT PLANNING AND RECORD KEEPING TO COMPANIES INVOLVED IN POULTRY AND FOOD PROCESSING. 9.25% Senior Secured Tranche B Note due 2012 (C) $ 868,863 * $ 865,646 $ 869,541 12% Senior Subordinated Note due 2014 $ 664,062 ** 633,855 668,625 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. 2.30% int. 03/01/05 66,448 228,526 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 41 shs. 04/28/06 34,627 39,842 ------------- ------------- *04/28/06 and 12/21/06. **04/28/06 and 09/13/06. 1,600,576 1,806,534 ------------- ------------- TORRENT GROUP HOLDINGS, INC. A CONTRACTOR SPECIALIZING IN THE SALES AND INSTALLATION OF ENGINEERED DRYWELLS FOR THE RETENTION AND FILTRATION OF STORMWATER AND NUISANCE WATER FLOW. 12.5% Senior Subordinated Note due 2013 $ 1,185,366 10/26/07 1,113,016 1,187,772 8% Convertible Preferred Stock 219 shs. 10/26/07 219,203 208,240 ------------- ------------- 1,332,219 1,396,012 ------------- ------------- TOTAL EQUIPMENT & SERVICE, INC. A MANUFACTURER OF A WIDE VARIETY OF EQUIPMENT USED IN THE OIL AND GAS INDUSTRY. 10.5% Senior Secured Term Note due 2013 $ 486,487 03/02/07 479,190 485,616 13% Senior Subordinated Note due 2014 $ 341,971 03/02/07 280,347 341,032 Common Stock (B) 71,542 shs. 03/02/07 71,542 67,965 Warrant, exercisable until 2014 to purchase common stock at $.01 per share (B) 19,733 shs. 03/02/07 54,784 197 ------------- ------------- 885,863 894,810 ------------- ------------- THE TRANZONIC COMPANIES A PRODUCER OF COMMERCIAL AND INDUSTRIAL SUPPLIES, SUCH AS SAFETY PRODUCTS, JANITORIAL SUPPLIES, WORK APPAREL, WASHROOM AND RESTROOM SUPPLIES AND SANITARY CARE PRODUCTS. 13% Senior Subordinated Note due 2009 $ 1,356,000 02/05/98 1,309,924 1,356,000 Common Stock (B) 315 shs. 02/04/98 315,000 161,768 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 222 shs. 02/05/98 184,416 114,008 ------------- ------------- 1,809,340 1,631,776 ------------- ------------- TRANSPAC HOLDING COMPANY A DESIGNER, IMPORTER, AND WHOLESALER OF HOME DECOR AND SEASONAL GIFT PRODUCTS. 12% Senior Subordinated Note due 2015 $ 938,651 10/31/07 873,703 937,247 Common Stock (B) 110 shs. 10/31/07 110,430 104,909 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 50 shs. 10/31/07 46,380 1 ------------- ------------- 1,030,513 1,042,157 ------------- ------------- TRANSTAR HOLDING COMPANY A DISTRIBUTOR OF AFTERMARKET AUTOMOTIVE TRANSMISSION PARTS. 12% Senior Subordinated Note due 2013 $ 918,000 08/31/05 884,194 945,540 Common Stock (B) 571 shs. * 570,944 667,510 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 46 shs. 08/31/05 41,021 53,196 ------------- ------------- *08/31/05 and 04/30/07. 1,496,159 1,666,246 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 25 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- TRONAIR, INC. A DESIGNER, ENGINEER AND MANUFACTURER OF GROUND SUPPORT EQUIPMENT FOR THE BUSINESS, COMMUTER AND COMMERCIAL AVIATION MARKETS. 10.5% Senior Secured Term Note due 2008 $ 225,806 01/20/00 $ 225,806 $ 225,812 12% Senior Subordinated Note due 2010 $ 758,100 01/20/00 743,786 758,626 Common Stock (B) 129,960 shs. 01/20/00 129,960 727,978 Warrant, exercisable until 2010, to purchase common stock at $1 per share (B) 148,911 shs. 01/20/00 56,316 834,133 ------------- ------------- 1,155,868 2,546,549 ------------- ------------- TRUCK BODIES & EQUIPMENT INTERNATIONAL A DESIGNER AND MANUFACTURER OF ACCESSORIES FOR HEAVY AND MEDIUM DUTY TRUCKS, PRIMARILY DUMP BODIES, HOISTS, VARIOUS FORMS OF FLAT-BED BODIES, LANDSCAPE BODIES AND OTHER ACCESSORIES. 12% Senior Subordinated Note due 2013 $ 1,222,698 * 1,148,723 1,192,784 Common Stock (B) 393 shs. * 423,985 277,121 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 81 shs. * 84,650 57,230 ------------- ------------- *07/19/05 and 12/22/05. 1,657,358 1,527,135 ------------- ------------- TRUSTILE DOORS, INC. A MANUFACTURER AND DISTRIBUTOR OF INTERIOR DOORS. 12.5% Senior Subordinated Note due 2010 $ 450,000 04/11/03 432,339 454,500 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 3,060 shs. 04/11/03 44,432 116,119 ------------- ------------- 476,771 570,619 ------------- ------------- U-LINE CORPORATION A MANUFACTURER OF HIGH-END, BUILT-IN, UNDERCOUNTER ICE MAKING, WINE STORAGE AND REFRIGERATION APPLIANCES. 12.5% Senior Subordinated Note due 2012 $ 996,500 04/30/04 919,097 991,550 Common Stock (B) 96 shs. 04/30/04 96,400 75,821 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 122 shs. 04/30/04 112,106 95,956 ------------- ------------- 1,127,603 1,163,327 ------------- ------------- VICTORY VENTURES LLC AN ACQUIRER OF CONTROLLING OR SUBSTANTIAL INTERESTS IN OTHER ENTITIES. Series A Preferred Units 1 ut. 12/02/96 236 -- ------------- ------------- VISIONEERING, INC. A DESIGNER AND MANUFACTURER OF TOOLING AND FIXTURES FOR THE AEROSPACE INDUSTRY. 10.5% Senior Secured Term Loan due 2013 $ 458,824 05/17/07 451,942 460,126 13% Senior Subordinated Note due 2014 $ 370,588 05/17/07 333,332 375,534 Common Stock (B) 70,588 shs. 05/17/07 70,588 67,059 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 20,003 shs. 05/17/07 31,460 200 ------------- ------------- 887,322 902,919 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 26 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES: (A) CONTINUED Percentage Date Cost Fair Value --------------------------------------------------------------------------------------------------------------------------------- VITALITY FOODSERVICE, INC. A NON-CARBONATED BEVERAGE DISPENSING COMPANY FOCUSED ON THE FOODSERVICE INDUSTRY. 15% Senior Subordinated Note due 2011 $ 1,157,670 09/24/04 $ 1,076,461 $ 1,041,900 Common Stock (B) 14,006 shs. * 140,064 84,634 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 12,593 shs. 09/24/04 98,938 76,096 ------------- ------------- *09/24/04 and 12/22/06. 1,315,463 1,202,630 ------------- ------------- VITEX PACKAGING GROUP, INC. A MANUFACTURER OF SPECIALTY PACKAGING, PRIMARILY ENVELOPES AND TAGS USED ON TEA BAGS. 12.5% Senior Subordinated Note due 2012 $ 900,000 07/19/04 785,152 810,000 14.5% PIK Note due 2010 56,250 06/30/07 51,402 50,625 Limited Liability Company Unit Class A (B) 219,375 uts. 07/19/04 219,375 -- Limited Liability Company Unit Class B (B) 96,848 uts. 07/19/04 96,848 -- ------------- ------------- 1,152,777 860,625 ------------- ------------- WAGGIN' TRAIN HOLDINGS LLC A PRODUCER OF PREMIUM QUALITY MEAT DOG TREATS. 14% Senior Subordinated Note due 2014 $ 1,126,243 11/15/07 1,103,718 1,117,998 Limited Liability Company Unit Class B (B) 224 uts. 11/15/07 223,757 212,572 Limited Liability Company Unit Class C (B) 224 uts. 11/15/07 -- 2 ------------- ------------- 1,327,475 1,330,572 ------------- ------------- WALLS INDUSTRIES, INC. A PROVIDER OF BRANDED WORKWEAR AND SPORTING GOODS APPAREL. Limited Partnership Interest 0.20% int. 07/12/04 1,974 11,480 Common Stock (B) 2,133 shs. 12/21/07 -- 12,406 ------------- ------------- 1,974 23,886 ------------- ------------- WELLBORN FOREST HOLDING CO. A MANUFACTURER OF SEMI-CUSTOM KITCHEN AND BATH CABINETRY. 12.13% Senior Subordinated Note due 2014 $ 911,250 11/30/06 850,851 876,358 Common Stock (B) 101 shs. 11/30/06 101,250 91,125 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 51 shs. 11/30/06 45,790 1 ------------- ------------- 997,891 967,484 ------------- ------------- WORKPLACE MEDIA HOLDING CO. A DIRECT MARKETER SPECIALIZING IN PROVIDING ADVERTISERS WITH ACCESS TO CONSUMERS IN THE WORKPLACE. 13% Senior Subordinated Note due 2015 $ 613,692 05/14/07 559,053 607,451 Limited Partnership Interest (B) 12.26% int. 05/14/07 61,308 58,243 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 47 shs. 05/14/07 44,186 -- ------------- ------------- 664,547 665,694 ------------- ------------- TOTAL PRIVATE PLACEMENT INVESTMENTS (E) 92,832,456 94,407,034 ------------- ------------- --------------------------------------------------------------------------------------------------------------------------------- 27 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 INTEREST DUE PRINCIPAL CORPORATE RESTRICTED SECURITIES:(A) CONTINUED RATE DATE AMOUNT COST FAIR VALUE --------------------------------------------------------------------------------------------------------------------------------- RULE 144A SECURITIES - 4.60%:(A) BONDS - 4.60% Bristow Group, Inc. 7.500% 09/15/17 $ 75,000 $ 75,000 $ 75,375 Charter Communications Op LLC 8.000 04/30/12 750,000 736,875 723,750 Compucom Systems, Inc. 12.500 10/01/15 670,000 647,534 654,925 Douglas Dynamics LLC 7.750 01/15/12 325,000 326,335 281,125 G F S I, Inc. (C) 10.500 06/01/11 375,000 340,343 356,250 Intergen NV 9.000 06/30/17 375,000 371,959 394,688 Packaging Dynamics Corporation of America 10.000 05/01/16 1,200,000 1,199,327 1,056,000 Penhall International 12.000 08/01/14 325,000 333,079 302,250 Quebecor Media, Inc. 7.750 03/15/16 575,000 550,877 553,438 Ryerson, Inc. 12.000 11/01/15 30,000 30,000 29,625 Snoqualmie Entertainment Authority 9.125 02/01/15 250,000 244,063 240,625 Steel Dynamics, Inc. 6.750 04/01/15 100,000 100,000 97,000 Tenneco, Inc. 8.125 11/15/15 50,000 50,000 49,500 TRW Automotive, Inc. 7.250 03/15/17 500,000 440,000 448,750 Tunica-Biloxi Gaming Authority 9.000 11/15/15 540,000 556,604 552,150 TOTAL BONDS 6,001,996 5,815,451 ------------ ------------ TOTAL RULE 144A SECURITIES 6,001,996 5,815,451 ------------ ------------ TOTAL CORPORATE RESTRICTED SECURITIES $ 98,834,452 $100,222,485 ------------ ------------ --------------------------------------------------------------------------------------------------------------------------------- 28 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 INTEREST DUE PRINCIPAL CORPORATE PUBLIC SECURITIES - 25.34%:(A) RATE DATE AMOUNT COST MARKET VALUE --------------------------------------------------------------------------------------------------------------------------------- BONDS - 23.62% Allied Waste NA 7.375% 04/15/14 $ 140,000 $ 141,550 $ 139,650 Appleton Papers, Inc. 8.125 06/15/11 250,000 250,000 245,313 Aramark Corporation 8.500 02/01/15 100,000 100,000 101,250 Aramark Corporation (C) 8.411 02/01/15 100,000 100,000 97,500 Atlas Pipeline Partners 8.125 12/15/15 600,000 611,633 594,000 Basic Energy Services 7.125 04/15/16 625,000 610,043 587,500 Blockbuster, Inc. (C) 9.000 09/01/12 275,000 276,093 235,125 Boyd Gaming Corporation 7.125 02/01/16 150,000 146,625 141,750 Cablevision Systems Corporation 8.000 04/15/12 500,000 505,760 485,000 Cincinnati Bell, Inc. 8.375 01/15/14 550,000 503,750 536,250 Clayton Williams Energy, Inc. 7.750 08/01/13 575,000 557,000 503,125 Community Health Systems, Inc. 8.875 07/15/15 475,000 464,276 483,906 Del Monte Corporation 8.625 12/15/12 200,000 200,000 201,500 Dynegy Holdings, Inc. 7.500 06/01/15 250,000 222,261 233,750 Dynegy Holdings, Inc. 8.375 05/01/16 665,000 675,847 650,038 Edison Mission Energy 7.750 06/15/16 35,000 35,000 36,050 Electronic Data Systems Corporation 7.125 10/15/09 500,000 502,581 516,163 Esterline Technologies 7.750 06/15/13 175,000 175,000 179,375 Ford Motor Credit Co. 7.375 10/28/09 750,000 748,125 705,935 Ford Motor Credit Co. 8.000 12/15/16 375,000 358,125 320,130 Gencorp, Inc. 9.500 08/15/13 130,000 130,000 131,300 General Motors Acceptance Corporation 5.850 01/14/09 750,000 741,353 717,251 Goodyear Tire & Rubber Co. 7.857 08/15/11 350,000 327,250 354,375 Goodyear Tire & Rubber Co. 8.625 12/01/11 250,000 262,474 260,625 Goodyear Tire & Rubber Co. 9.000 07/01/15 64,000 65,234 67,840 GulfMark Offshore, Inc. 7.750 07/15/14 300,000 298,725 303,000 H C A, Inc. 9.250 11/15/16 500,000 508,603 525,000 Hughes Network Systems 9.500 04/15/14 525,000 535,874 531,561 Idearc, Inc. 8.000 11/15/16 520,000 521,094 477,100 Inergy LP 8.250 03/01/16 75,000 75,000 77,625 Intelsat Bermuda Ltd. 9.250 06/15/16 690,000 716,657 693,450 Interline Brands, Inc. 8.125 06/15/14 830,000 824,237 821,700 Iron Mountain, Inc. 8.750 07/15/18 500,000 514,807 525,625 Koppers, Inc. 9.875 10/15/13 170,000 170,000 178,925 Lear Corporation 8.750 12/01/16 1,000,000 950,938 910,000 Leucadia National Corporation 7.000 08/15/13 350,000 355,195 335,125 Liberty Media Corporation 5.700 05/15/13 500,000 475,805 463,206 Majestic Star Casino LLC 9.500 10/15/10 250,000 250,000 236,250 Manitowoc Company, Inc. 7.125 11/01/13 100,000 100,000 99,000 Mariner Energy, Inc. 8.000 05/15/17 400,000 402,642 380,500 Markwest Energy Operating Co. 6.875 11/01/14 550,000 532,750 523,875 Mediacom Broadband LLC 8.500 10/15/15 750,000 765,889 664,687 --------------------------------------------------------------------------------------------------------------------------------- 29 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 INTEREST DUE PRINCIPAL CORPORATE PUBLIC SECURITIES:(A) CONTINUED RATE DATE AMOUNT COST MARKET VALUE --------------------------------------------------------------------------------------------------------------------------------- BONDS, CONTINUED Metaldyne Corporation (C) 10.000% 11/01/13 $ 340,000 $ 341,676 $ 280,500 N R G Energy, Inc. 7.375 02/01/16 600,000 598,750 585,000 N T L Cable PLC 9.125 08/15/16 790,000 813,424 782,100 Neiman Marcus Group, Inc. 10.375 10/15/15 600,000 600,000 624,750 Nextel Communications, Inc. 7.375 08/01/15 400,000 407,680 393,847 North American Energy Partners 8.750 12/01/11 200,000 200,000 197,500 NOVA Chemicals Corporation (C) 7.863 11/15/13 515,000 511,538 481,525 O E D Corp/Diamond Jo Company Guarantee 8.750 04/15/12 500,000 492,980 500,000 Offshore Logistics, Inc. 6.125 06/15/13 350,000 350,000 336,000 Petrohawk Energy Corporation 9.125 07/15/13 750,000 762,292 789,375 Pliant Corporation (C) 11.850 06/15/09 764,203 774,565 779,487 Quicksilver Resources, Inc. 7.125 04/01/16 600,000 583,125 589,500 R H Donnelley, Inc. 8.875 01/15/16 625,000 653,069 584,375 Rental Service Corporation 9.500 12/01/14 500,000 506,864 447,500 Rock-Tenn Co. 8.200 08/15/11 430,000 441,181 445,050 Rogers Wireless, Inc. 7.500 03/15/15 560,000 594,819 612,408 Sheridan Acquisition Corporation 10.250 08/15/11 225,000 222,001 225,000 Stewart & Stevenson LLC 10.000 07/15/14 750,000 770,972 753,750 Tenet Healthcare Corporation 6.375 12/01/11 250,000 241,250 227,500 Tenneco, Inc. 8.625 11/15/14 500,000 501,192 491,250 Tesoro Petroleum Corporation 6.500 06/01/17 250,000 250,000 247,500 Texas Industries, Inc. 7.250 07/15/13 35,000 35,000 34,300 Titan International, Inc. 8.000 01/15/12 70,000 70,000 67,550 Transdigm, Inc. 7.750 07/15/14 150,000 151,385 152,250 Triton PCS, Inc. 8.500 06/01/13 500,000 500,000 517,500 Tube City IMS Corporation 9.750 02/01/15 1,000,000 992,062 900,000 United Components, Inc. 9.375 06/15/13 535,000 535,989 528,313 United Rentals, Inc. 7.750 11/15/13 325,000 325,000 282,750 Valassis Communications, Inc. 8.250 03/01/15 75,000 73,191 66,844 Vought Aircraft Industries 8.000 07/15/11 650,000 648,309 615,875 Warner Music Group Corporation 7.375 04/15/14 125,000 125,000 96,250 ------------ ------------ TOTAL BONDS 30,781,510 29,906,879 ------------ ------------ --------------------------------------------------------------------------------------------------------------------------------- 30 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 SHARES OR INTEREST DUE PRINCIPAL CORPORATE PUBLIC SECURITIES:(A) CONTINUED RATE DATE AMOUNT COST MARKET VALUE --------------------------------------------------------------------------------------------------------------------------------- COMMON STOCK - 1.53% Comcast Corporation (B) 16,800 $ 310,632 $ 306,768 Distributed Energy Systems Corporation (B) 14,000 177,078 5,600 EnerNOC, Inc. (B) 23,500 648,410 1,153,850 ITC^Deltacom, Inc. (B) 94,588 827,645 472,940 ------------ ------------ TOTAL COMMON STOCK 1,963,765 1,939,158 ------------ ------------ CONVERTIBLE BONDS - 0.19% Citadel Broadcasting Corporation 1.875% 02/15/11 $ 300,000 232,875 246,000 ------------ ------------ TOTAL CONVERTIBLE BONDS 232,875 246,000 ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 32,978,150 $ 32,092,037 ------------ ------------ INTEREST DUE PRINCIPAL SHORT TERM SECURITIES RATE/YIELD* DATE AMOUNT COST MARKET VALUE --------------------------------------------------------------------------------------------------------------------------------- COMMERCIAL PAPER - 5.94% Avery Dennison Corporation 5.605% 01/02/08 $ 651,000 $ 650,900 $ 650,900 Computer Sciences Corporation 5.056 01/08/08 2,616,000 2,613,431 2,613,431 Kinder Morgan Energy Partners LP 5.605 01/03/08 2,603,000 2,602,190 2,602,190 Textron Financial Corporation 5.706 01/02/08 1,659,000 1,658,737 1,658,737 ------------ ------------ TOTAL SHORT-TERM SECURITIES $ 7,525,258 $ 7,525,258 ------------ ------------ TOTAL INVESTMENTS 110.44% $139,337,860 $139,839,780 ------ ============ ------------ Other Assets 3.93 4,977,867 Liabilities (14.37) (18,192,313) ------ ------------ TOTAL NET ASSETS 100.00% $126,625,334 ====== ============ (A) In each of the convertible note, warrant, and common stock investments, the issuer has agreed to provide certain registration rights. (B) Non-income producing security. (C) Variable rate security; rate indicated is as of 12/31/07. (D) Defaulted security; interest not accrued. (E) Illiquid securities. At December 31, 2007, the value of these securities amounted to $94,407,034 or 74.56% of net assets. * Effective yield at purchase PIK - Payment-in-kind --------------------------------------------------------------------------------------------------------------------------------- 31 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Fair Value/ Fair Value/ Industry Classification Market Value Industry Classification Market Value ------------------------------------------------------------ ------------------------------------------------------------ AEROSPACE - 4.88% BUILDINGS & REAL ESTATE - 1.52% Consolidated Foundries Holdings $ 2,085,533 K W P I Holdings Corporation $ 1,320,961 Esterline Technologies 179,375 Texas Industries, Inc. 34,300 Gencorp, Inc. 131,300 TruStile Doors, Inc. 570,619 Hughes Network Systems 531,561 ------------ P A S Holdco LLC 1,578,820 1,925,880 Transdigm, Inc. 152,250 ------------ Visioneering, Inc. 902,919 CHEMICAL, PLASTICS & RUBBER - 0.74% Vought Aircraft Industries 615,875 Capital Specialty Plastics, Inc. 279,466 ------------ Koppers, Inc. 178,925 6,177,633 NOVA Chemicals Corporation 481,525 ------------ ------------ AUTOMOBILE - 10.30% 939,916 Ford Motor Credit Co. 1,026,065 ------------ Fuel Systems Holding Corporation 1,183,906 CONSUMER PRODUCTS - 9.31% General Motors Acceptance Corporation 717,251 Aero Holdings, Inc. 1,784,832 Goodyear Tire & Rubber Co. 682,840 Augusta Sportswear Holding Co. 2,207,087 Jason, Inc. 1,011,760 Bravo Sports Holding Corporation 1,426,967 Lear Corporation 910,000 G F S I, Inc. 356,250 Metaldyne Corporation 280,500 K N B Holdings Corporation 1,427,387 Nyloncraft, Inc. 1,083,929 Momentum Holding Co. 810,445 Ontario Drive & Gear Ltd. 1,835,409 R A J Manufacturing Holdings LLC 1,462,050 Qualis Automotive LLC 1,062,679 Royal Baths Manufacturing Company 652,688 Tenneco, Inc. 540,750 The Tranzonic Companies 1,631,776 Titan International, Inc. 67,550 Walls Industries, Inc. 23,886 Transtar Holding Company 1,666,246 ------------ TRW Automotive, Inc. 448,750 11,783,368 United Components, Inc. 528,313 ------------ ------------ CONTAINERS, PACKAGING & GLASS - 5.40% 13,045,948 Flutes, Inc. 878,906 ------------ Maverick Acquisition Company 501,911 BEVERAGE, DRUG & FOOD - 3.28% P I I Holding Corporation 1,480,991 Aramark Corporation 198,750 Packaging Dynamics Corporation of America 1,056,000 Del Monte Corporation 201,500 Paradigm Packaging, Inc. 1,278,889 Golden Country Foods Holding, Inc. 1,079,218 Pliant Corporation 779,487 Nonni's Food Company 1,469,875 Vitex Packaging Group, Inc. 860,625 Specialty Foods Group, Inc. -- ------------ Vitality Foodservice, Inc. 1,202,630 6,836,809 ------------ ------------ 4,151,973 DISTRIBUTION - 1.74% ------------ Duncan Systems, Inc. 996,272 BROADCASTING & ENTERTAINMENT - 2.81% Magnatech International, Inc. 1,203,716 Cablevision Systems Corporation 485,000 QualServ Corporation -- Charter Communications Op LLC 723,750 Strategic Equipment & Supply Corporation, Inc. -- Citadel Broadcasting Corporation 246,000 ------------ Comcast Corporation 306,768 2,199,988 Liberty Media Corporation 463,206 ------------ Mediacom Broadband LLC 664,687 DIVERSIFIED/CONGLOMERATE, MANUFACTURING - 5.93% Workplace Media Holdings Co. 665,694 A H C Holding Company, Inc. 1,336,263 ------------ Arrow Tru-Line Holdings, Inc. 884,174 3,555,105 Douglas Dynamics LLC 281,125 ------------ Evans Consoles, Inc. 534,195 Postle Aluminum Company LLC 1,442,314 Radiac Abrasives, Inc. 1,505,032 Truck Bodies & Equipment International 1,527,135 ------------ 7,510,238 ------------ ---------------------------------------------------------------------------------------------------------------------------------- 32 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Fair Value/ Fair Value/ Industry Classification Market Value Industry Classification Market Value ------------------------------------------------------------ ------------------------------------------------------------ DIVERSIFIED/CONGLOMERATE, SERVICE - 4.68% HOME & OFFICE FURNISHINGS, HOUSEWARES, AND DURABLE Advanced Technologies Holdings $ 1,336,919 CONSUMER PRODUCTS - 8.38% Allied Waste NA 139,650 Connor Sport Court International, Inc. $ 529,709 CapeSuccess LLC 2,512 H M Holding Company 585,000 Diversco, Inc./DHI Holdings, Inc. -- Home Decor Holding Company 1,252,979 Dwyer Group, Inc. 726,014 Justrite Manufacturing Acquisition Co. 984,187 Fowler Holding, Inc. 1,342,356 K H O F Holdings, Inc. 1,345,170 Insurance Claims Management, Inc. -- Monessen Holding Corporation 1,280,788 Interline Brands, Inc. 821,700 Stanton Carpet Holding Co. 1,456,949 Iron Mountain, Inc. 525,625 Transpac Holdings Company 1,042,157 Mail Communications Group, Inc. 664,647 U-Line Corporation 1,163,327 Moss, Inc. 365,544 Wellborn Forest Holding Co. 967,484 ------------ ------------ 5,924,967 10,607,750 ------------ ------------ ELECTRONICS - 1.73% LEISURE, AMUSEMENT, ENTERTAINMENT - 3.28% Connecticut Electric, Inc. 1,350,477 Boyd Gaming Corporation 141,750 Directed Electronics, Inc. 323,896 Electra Bicycle Company LLC 797,571 Distributed Energy Systems Corporation 5,600 Majestic Star Casino LLC 236,250 Electronic Data Systems Corporation 516,163 O E D Corp/Diamond Jo Company Guarantee 500,000 ------------ Savage Sports Holding, Inc. 1,590,206 2,196,136 Snoqualmie Entertainment Authority 240,625 ------------ Tunica-Biloxi Gaming Authority 552,150 FARMING & AGRICULTURE - 1.05% Warner Music Group Corporation 96,250 Protein Genetics, Inc. -- ------------ Waggin' Train Holdings LLC 1,330,572 4,154,802 ------------ ------------ 1,330,572 MACHINERY - 9.18% ------------ Davis-Standard LLC 1,985,079 FINANCIAL SERVICES - 1.55% Integration Technology Systems, Inc. -- Highgate Capital LLC -- K-Tek Holdings Corporation 1,332,222 Leucadia National Corporation 335,125 Manitowoc Company, Inc. 99,000 Nesco Holdings Corporation 1,331,709 Morton Industrial Group, Inc. 1,190,012 Penhall International 302,250 Navis Global 1,022,059 Victory Ventures LLC -- NetShape Technologies, Inc. 1,240,623 ------------ Pacific Consolidated Holdings LLC 704,511 1,969,084 Safety Speed Cut Manufacturing Company, Inc. 736,270 ------------ Stewart & Stevenson LLC 753,750 HEALTHCARE, EDUCATION & CHILDCARE - 3.96% Synventive Equity LLC 17,714 A T I Acquisition Company 1,144,649 Tronair, Inc. 2,546,549 American Hospice Management Holding LLC 1,141,626 ------------ Community Health Systems, Inc. 483,906 11,627,789 F H S Holdings LLC 1,494,252 ------------ H C A, Inc. 525,000 MEDICAL DEVICES/BIOTECH - 2.68% Tenet Healthcare Corporation 227,500 Coeur, Inc. 801,339 ------------ E X C Acquisition Corporation 97,932 5,016,933 MicroGroup, Inc. 1,638,267 ------------ OakRiver Technology, Inc. 860,166 ------------ 3,397,704 ------------ ---------------------------------------------------------------------------------------------------------------------------------- 33 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2007 Fair Value/ Fair Value/ Industry Classification Market Value Industry Classification Market Value ------------------------------------------------------------ ------------------------------------------------------------ MINING, STEEL, IRON & NON PRECIOUS METALS - 0.81% TECHNOLOGY - 2.48% Ryerson, Inc. $ 29,625 Compucom Systems, Inc. $ 654,925 Steel Dynamics, Inc. 97,000 EnerNOC, Inc. 1,153,850 Tube City IMS Corporation 900,000 Smart Source Holdings, Inc. 1,329,836 ------------ ------------ 1,026,625 3,138,611 ------------ ------------ NATURAL RESOURCES - 0.55% TELECOMMUNICATIONS - 3.17% Appleton Papers, Inc. 245,313 Cincinnati Bell, Inc. 536,250 Rock-Tenn Co. 445,050 Intelsat Bermuda Ltd. 693,450 ------------ ITC^DeltaCom, Inc. 472,940 690,363 Nextel Communications, Inc. 393,847 ------------ N T L Cable PLC 782,100 OIL & GAS - 3.72% Rogers Wireless, Inc. 612,408 Atlas Pipeline Partners 594,000 Triton P C S, Inc. 517,500 Basic Energy Services 587,500 ------------ Bristow Group, Inc. 75,375 4,008,495 Clayton Williams Energy, Inc. 503,125 ------------ GulfMark Offshore, Inc. 303,000 TRANSPORTATION - 1.67% Mariner Energy, Inc. 380,500 NABCO, Inc. 176,195 North American Energy Partners 197,500 Tangent Rail Corporation 1,943,197 Offshore Logistics 336,000 ------------ Quicksilver Resources, Inc. 589,500 2,119,392 Tesoro Petroleum Corporation 247,500 ------------ Total Equipment & Service, Inc. 894,810 UTILITIES - 2.60% ------------ Dynegy Holdings, Inc. 883,788 4,708,810 Edison Mission Energy 36,050 ------------ Inergy LP 77,625 PHARMACEUTICALS - 1.21% Intergen NV 394,688 CorePharma LLC 1,414,620 Markwest Energy Operating Co. 523,875 Enzymatic Therapy, Inc. 117,303 N R G Energy, Inc. 585,000 ------------ Petrohawk Energy Corporation 789,375 1,531,923 ------------ ------------ 3,290,401 PUBLISHING/PRINTING - 1.51% ------------ Idearc, Inc. 477,100 WASTE MANAGEMENT / POLLUTION - 2.53% Quebecor Media, Inc. 553,438 Terra Renewal Services, Inc. 1,806,534 R H Donnelley, Inc. 584,375 Torrent Group Holdings, Inc. 1,396,012 Sheridan Acquisition Corporation 225,000 ------------ Valassis Communications, Inc. 66,844 3,202,546 ------------ ------------ 1,906,757 TOTAL CORPORATE RESTRICTED AND PUBLIC ------------ SECURITIES - 104.50% $132,314,522 RETAIL STORES - 1.85% ============ Blockbuster, Inc. 235,125 Neiman Marcus Group, Inc. 624,750 Olympic Sales, Inc. 747,879 Rental Service Corporation 447,500 United Rentals, Inc. 282,750 ------------ 2,338,004 ------------ ---------------------------------------------------------------------------------------------------------------------------------- 34 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2007 1. HISTORY MassMutual Participation Investors (the "Trust") was organized as a Massachusetts business trust under the laws of the Commonwealth of Massachusetts pursuant to a Declaration of Trust dated April 7, 1988. The Trust is a diversified closed-end management investment company. Babson Capital Management LLC ("Babson Capital"), a wholly-owned indirect subsidiary of Massachusetts Mutual Life Insurance Company ("MassMutual"), acts as its investment adviser. The Trust's investment objective is to maximize total return by providing a high level of current income, the potential for growth of income, and capital appreciation. The Trust's principal investments are privately placed, below-investment grade, long-term debt obligations purchased directly from their issuers, which tend to be smaller companies. At least half of these investments normally include equity features such as warrants, conversion rights, or other equity features that provide the Trust with the opportunity to realize capital gains. The Trust will also invest in publicly traded debt securities (including high yield securities), again with an emphasis on those with equity features, and in convertible preferred stocks and, subject to certain limitations, readily marketable equity securities. Below investment grade or high yield securities have predominantly speculative characteristics with respect to the capacity of the issuer to pay interest and repay principal. In addition, the Trust may temporarily invest in high quality, readily marketable securities. On January 27, 1998, the Board of Trustees authorized the formation of a wholly owned subsidiary of the Trust ("MMPI Subsidiary Trust") for the purpose of holding certain investments. The results of the MMPI Subsidiary Trust are consolidated in the accompanying financial statements. Footnote 2.D below discusses the federal tax consequences of the MMPI Subsidiary Trust. 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of significant accounting policies followed consistently by the Trust in the preparation of its consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. A. VALUATION OF INVESTMENTS: Valuation of a security in the Trust's portfolio is made on the basis of market price whenever market quotations are readily available and all securities of the same class held by the Trust can be readily sold in such market. Nearly all securities which are acquired by the Trust directly from the issuers and shares into which such securities may be converted or which may be purchased on the exercise of warrants attached to such securities will be subject to legal or contractual delays in, or restrictions on, resale and will therefore be "restricted securities." Generally speaking, as contrasted with open-market sales of unrestricted securities, which may be effected immediately if the market is adequate, restricted securities can be sold only in a public offering for which a registration statement is in effect under the Securities Act of 1933, as amended (the "1933 Act") or pursuant to a transaction that is exempt from registration under the 1933 Act. The value of restricted securities, and of any other assets for which there are no reliable market quotations, is the fair value as determined in good faith by the Trust's Board of Trustees (the "Trustees"). Each restricted security is valued by the Trustees as of the time of its acquisition and at least quarterly thereafter. The Trustees have established guidelines to aid in the valuation of each security. Generally, restricted securities are initially valued at cost or less at the time of acquisition by the Trust. Values greater or less than cost are used thereafter for restricted securities in appropriate circumstances. Among the factors ordinarily considered are the existence of restrictions upon the sale of a security held by the Trust; an estimate of the existence and the extent of a market for the security; the extent of any discount at which the security was acquired; the estimated period of time during which the security will not be freely marketable; the estimated expenses of registering or otherwise qualifying the security for public sale; estimated underwriting commissions if underwriting would be required to effect a sale; in the case of a convertible security, whether or not it would trade on the basis of its stock equivalent; in the case of a debt obligation which would trade independently of any equity equivalent, the current yields on comparable securities; the estimated amount of the floating supply of such securities available for purchase; the proportion of the issue held by the Trust; changes in the financial condition and prospects of the issuer; the existence of merger proposals or tender offers affecting the issuer; and any other factors affecting fair value, all in accordance with the Investment Company Act of 1940, as amended (the "1940 Act"). In making -------------------------------------------------------------------------------- 35 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2007 valuations, opinions of counsel may be relied upon as to whether or not securities are restricted securities and as to the legal requirements for public sale. When market quotations are readily available for unrestricted securities of an issuer, restricted securities of the same class are generally valued at a discount from the market price of such unrestricted securities. The Trustees, however, consider all factors in fixing any discount, including the filing of a registration statement for such securities under the 1933 Act and any other developments which are likely to increase the probability that the securities may be publicly sold by the Trust without restriction. The Trustees meet at least once in each quarter to approve the value of the Trust's portfolio securities as of the close of business on the last business day of the preceding quarter. This valuation requires the approval of a majority of the Trustees of the Trust, including a majority of the Trustees who are not interested persons of the Trust or of Babson Capital. In making valuations, the Trustees will consider reports by Babson Capital analyzing each portfolio security in accordance with the relevant factors referred to above. Babson Capital has agreed to provide such reports to the Trust at least quarterly. The consolidated financial statements include private placement restricted securities valued at $94,407,034 (74.56% of net assets) as of December 31, 2007 whose values have been estimated by the Trustees in the absence of readily ascertainable market values. Due to the inherent uncertainty of valuation, those estimated values may differ significantly from the values that would have been used had a ready market for the securities existed, and the differences could be material. The values for Rule 144A restricted securities and corporate public securities are stated at the last reported sales price or at prices based upon quotations obtained from brokers and dealers as of December 31, 2007, subject to discount where appropriate, and are approved by the Trustees. Short-term securities with more than sixty days to maturity are valued at fair value and short-term securities having a maturity of sixty days or less are valued at amortized cost, which approximates market value. B. ACCOUNTING FOR INVESTMENTS: Investment transactions are accounted for on the trade date. Dividend income is recorded on the ex-dividend date. Interest income is recorded on the accrual basis, including the amortization of premiums and accretion of discounts on bonds held using the yield-to-maturity method. The Trust does not accrue income when payment is delinquent and when management believes payment is questionable. Realized gains and losses on investment transactions and unrealized appreciation and depreciation of investments are reported for financial statement and federal income tax purposes on the identified cost method. C. USE OF ESTIMATES: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. D. FEDERAL INCOME TAXES: The Trust has elected to be taxed as a "regulated investment company" under the Internal Revenue Code, and intends to maintain this qualification and to distribute substantially all of its net taxable income to its shareholders. In any year when net long-term capital gains are realized by the Trust, management, after evaluating the prevailing economic conditions, will recommend that Trustees either designate the net realized long-term gains as undistributed and pay the federal capital gains taxes thereon, or distribute all or a portion of such net gains. For the year ended December 31, 2007, the Trust had a net realized taxable long-term capital gain balance of $1,777,038, which the Trustees voted to retain and pay the federal capital gain tax thereon. The Trust has accrued income tax expense of $621,963 on the Statement of Operations related to the retained realized capital gains. The Trust is taxed as a regulated investment company and is therefore limited as to the amount of non-qualified income that it may receive as the result of operating a trade or business, e.g. the Trust's PRO RATA share of income -------------------------------------------------------------------------------- 36 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2007 allocable to the Trust by a partnership operating company. The Trust's violation of this limitation could result in the loss of its status as a regulated investment company, thereby subjecting all of its net income and capital gains to corporate taxes prior to distribution to its shareholders. The Trust, from time-to-time, identifies investment opportunities in the securities of entities that could cause such trade or business income to be allocable to the Trust. The MMPI Subsidiary Trust (described in Footnote 1, above) was formed in order to allow investment in such securities without adversely affecting the Trust's status as a regulated investment company. The MMPI Subsidiary Trust is not taxed as a regulated investment company. Accordingly, prior to the Trust's receiving any distributions from the MMPI Subsidiary Trust, all of the MMPI Subsidiary Trust's taxable income and realized gains, including non-qualified income and realized gains, is subject to taxation at prevailing corporate tax rates. For the year ended December 31, 2007, the MMPI Subsidiary Trust has accrued income tax expense of $98,600. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of the existing assets and liabilities and their respective tax basis. As of December 31, 2007, the MMPI Subsidiary Trust has a deferred tax asset of $71,096 for which a full valuation reserve has been recorded. No future tax benefit is expected to be realized from this asset as of December 31, 2007. The MMPI Subsidiary Trust has recorded a deferred income tax benefit in the current year in the amount of $384,226 resulting from the decrease to zero of the deferred tax liability at December 31, 2006. In, June 2006, the Financial Accounting Standards Board ("FASB") issued FASB Interpretation No. 48, ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES - AN INTERPRETATION OF FASB STATEMENT NO. 109 ("FIN 48"). Management has analyzed the Trust's tax positions taken on federal income tax returns for all open tax years and has concluded that as of December 31, 2007, no provisions for income tax would be required in the Trust's financial statements. The Trust's federal and state income and federal excise tax returns for tax years for which the applicable statutes of limitations have not expired are subject to examination by the Internal Revenue Service and state departments of revenue. E. DISTRIBUTIONS TO SHAREHOLDERS: The Trust records distributions to shareholders from net investment income and net realized gains, if any, on the ex-dividend date. The Trust's net investment income dividend is declared four times per year, in April, July, October and December. The Trust's net realized capital gain distribution, if any, is declared in December. As of December 31, 2007, the components of distributable earnings on a tax basis included $1,026,768 of undistributed ordinary income. Such distributions and distributable earnings on a tax basis are determined in conformity with income tax regulations, which may differ from accounting principles generally accepted in the United States of America. Net investment income and net realized gains or losses of the Trust as presented under accounting principles generally accepted in the United States of America may differ from distributable earnings due to earnings from the MMPI Subsidiary Trust as well as certain permanent and temporary differences in the recognition of income and net realized gains or losses on certain investments. Permanent differences will result in reclassifications to the capital accounts. In 2007, the Trust increased undistributed net investment income and decreased additional paid in capital by a total of $32,527 to more accurately display the Trust's financial position on a tax-basis in accordance with accounting principles generally accepted in the United States of America. These re-classifications had no impact on net asset value. The tax character of distributions declared during the years ended December 31, 2007 and 2006 was as follows: DISTRIBUTIONS PAID FROM: 2007 2006 ---------------------------- Ordinary Income $ 12,315,585 $ 11,648,274 Long-term Capital gains $ -- $ -- F. EXPENSE REDUCTION: Citibank, N.A. ("Citibank") serves as custodian to the Trust. Pursuant to the custodian agreement, Citibank receives a fee reduced by credits on cash balances the Trust maintains with Citibank. All credit balances, if -------------------------------------------------------------------------------- 37 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2007 any, used to reduce the Trust's custodian fees are reported as fees paid indirectly on the Statement of Operations. For the year ended December 31, 2007, there were no credit balances used to reduce custodian fees. 3. INVESTMENT ADVISORY AND ADMINISTRATIVE SERVICES FEE A. SERVICES: Under an Investment Advisory and Administrative Services Contract (the "Contract") with the Trust, Babson Capital has agreed to use its best efforts to present to the Trust a continuing and suitable investment program consistent with the investment objectives and policies of the Trust. Babson Capital represents the Trust in any negotiations with issuers, investment banking firms, securities brokers or dealers and other institutions or investors relating to the Trust's investments. Under the Contract, Babson Capital also provides administration of the day-to-day operations of the Trust and provides the Trust with office space and office equipment, accounting and bookkeeping services, and necessary executive, clerical and secretarial personnel for the performance of the foregoing services. B. FEE: For its services under the Contract, Babson Capital is paid a quarterly investment advisory fee equal to .225% of the value of the Trust's net assets as of the last business day of each fiscal quarter, an amount approximately equivalent to .90% on an annual basis. A majority of the Trustees, including a majority of the Trustees who are not interested persons of the Trust or of Babson Capital, approve the valuation of the Trust's net assets as of such day. 4. SENIOR SECURED INDEBTEDNESS A. NOTE PAYABLE: MassMutual holds the Trust's $12,000,000 Senior Fixed Rate Convertible Note (the "Note") issued by the Trust in 1995. The Note, as amended, is due December 13, 2011 and accrues interest at 5.80% per annum. MassMutual, at its option, can convert the principal amount of the Note into common shares. The dollar amount of principal would be converted into an equivalent dollar amount of common shares based upon the average price of the common shares for ten business days prior to the notice of conversion. For the year ended December 31, 2007, the Trust incurred total interest expense on the Note of $696,000. The Trust may redeem the Note, in whole or in part, at the principal amount proposed to be redeemed together with the accrued and unpaid interest thereon through the redemption date plus a Make Whole Premium. The Make Whole Premium equals the excess of (i) the present value of the scheduled payments of principal and interest which the Trust would have paid but for the proposed redemption, discounted at the rate of interest of U.S. Treasury obligations whose maturity approximates that of the Note plus 0.50% over (ii) the principal of the Note proposed to be redeemed. B. REVOLVING CREDIT AGREEMENT: The Trust entered into a $15,000,000 Revolving Credit Agreement with Bank of America N.A. (the "Agent Bank") dated May 29, 1997, which had a stated maturity date of May 31, 2004, (the maturity date was later extended to May 31, 2007 pursuant to the First Amended and Restated Revolving Credit Agreement). On May 31, 2007, the maturity date of this loan was extended to May 30, 2008, and its terms were amended and restated pursuant to the First Amendment to the First Amended and Restated Revolving Credit Agreement (the "Revolver"), between the Trust and the Agent Bank. The Revolver bears interest payable quarterly in arrears at a per annum rate that varies depending upon whether the Trust requests a Base Rate Loan or Eurodollar Base Rate Loan. Interest on Base Rate loans equals the higher of: (i) the annual "Base Rate" as set periodically by the Agent Bank and (ii) the most recent Federal Funds Effective Rate plus .50% per annum. Per annum interest on Eurodollar Base Rate Loans equals .35% plus the British Bankers Association LIBOR rate, divided by 1 minus the Eurodollar Reserve Percentage. The Trust also incurs expense on the undrawn portion of the total Revolver at a rate of .25% from January 1, 2007 through May 31, 2007, and the amended rate of .10% from June 1, 2007 through December 31, 2007 per annum. As of December 31, 2007, there were no outstanding loans against the Revolver. For the year ended December 31, 2007, the Trust incurred expense on the Revolver of $24,475 related to the undrawn portion. -------------------------------------------------------------------------------- 38 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2007 5. PURCHASES AND SALES OF INVESTMENTS FOR THE YEAR ENDED COST OF INVESTMENTS 12/31/2007 ACQUIRED ----------------------------------------------------------------------------- Corporate restricted securities $ 31,739,132 Corporate public securities 11,917,394 ----------------------------------------------------------------------------- PROCEEDS FROM SALES OR MATURITIES ----------------------------------------------------------------------------- Corporate restricted securities $ 28,650,640 Corporate public securities 17,803,846 ----------------------------------------------------------------------------- The aggregate cost of investments is substantially the same for financial reporting and federal income tax purposes as of December 31, 2007. The net unrealized appreciation of investments for financial reporting and federal tax purposes as of December 31, 2007 is $501,920 and consists of $13,263,766 appreciation and $12,761,846 depreciation. 6. QUARTERLY RESULTS OF INVESTMENT OPERATIONS (UNAUDITED) AMOUNT PER SHARE ----------------------------------------------------------------------------- MARCH 31, 2007 ----------------------------------------------------------------------------- Investment income $ 3,065,532 Net investment income 2,439,056 $ 0.25 Net realized and unrealized gain on investments (net of taxes) 663,578 0.07 ----------------------------------------------------------------------------- JUNE 30, 2007 ----------------------------------------------------------------------------- Investment income $ 3,689,385 Net investment income 3,111,679 $ 0.32 Net realized and unrealized loss on investments (net of taxes) (698,739) (0.07) ----------------------------------------------------------------------------- SEPTEMBER 30, 2007 ----------------------------------------------------------------------------- Investment income $ 4,378,106 Net investment income 3,768,181 $ 0.38 Net realized and unrealized gain on investments (net of taxes) 786,409 0.08 ----------------------------------------------------------------------------- DECEMBER 31, 2007 ----------------------------------------------------------------------------- Investment income $ 3,412,839 Net investment income 2,739,044 $ 0.28 Net realized and unrealized loss on investments (net of taxes) (1,211,363) (0.13) 7. AGGREGATE REMUNERATION PAID TO OFFICERS, TRUSTEES AND THEIR AFFILIATED PERSONS For the year ended December 31, 2007, the Trust paid its Trustees aggregate remuneration of $142,750. During the year the Trust did not pay any compensation to any of its Trustees who are "interested persons" (as defined by the 1940 Act) of the Trust. The Trust classifies Messers. Crandall and Joyal as "interested persons" of the Trust. All of the Trust's officers are employees of Babson Capital or MassMutual. Pursuant to the Contract, the Trust does not compensate its officers who are employees of Babson Capital or MassMutual. Mr. Crandall, one of the Trust's Trustees, is an "affiliated person" (as defined by the 1940 Act) of MassMutual and Babson Capital. The Trust did not make any payments to Babson Capital for the year ended December 31 2007, other than amounts payable to Babson Capital pursuant to the Contract. For the year ended December 31, 2007, the Trust paid the following amounts to MassMutual, exclusive of interest expense on the Note explained in Footnote 4.A: Preparation of the Trust's Quarterly and Annual Reports to Shareholders $ 11,683 Preparation of Certain of the Trust's Shareholder Communications 1,223 Preparation of the Trust's Annual Proxy Statements 1,642 -------- $ 14,548 ======== 8. NEW ACCOUNTING PRONOUNCEMENTS In September 2006, FASB issued Statement of Financial Accounting Standards No. 157, FAIR VALUE MEASUREMENTS ("FAS 157"). FAS 157 establishes a single authoritative definition of fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. FAS 157 applies to fair value measurements already required or permitted by existing standards. The change to current generally accepted accounting principles from the application of FAS 157 relates to the definition of fair value, the methods used to measure fair value, and the expanded disclosures about fair value measurements. Management of the Trust does not believe the adoption of FAS 157 will materially impact the financial statement amounts, however, additional disclosures may be required about the inputs used to develop the measurements and the effect of certain of the measurements on changes in net assets for the period. FAS 157 is effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. -------------------------------------------------------------------------------- 39 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2007 9. CERTIFICATIONS (UNAUDITED) As required under New York Stock Exchange ("NYSE") Corporate Governance Rules, the Trust's principal executive officer has certified to the NYSE that he was not aware, as of the certification date, of any violation by the Trust of the NYSE's Corporate Governance listing standards. In addition, as required by Section 302 of the Sarbanes-Oxley Act of 2002 and related SEC rules, the Trust's principal executive and principal financial officers have made quarterly certifications, included in filings with the Securities and Exchange Commission on Forms N-CSR and N-Q, relating to, among other things, the Trusts disclosure controls and procedures and internal control over financial reporting, as applicable. -------------------------------------------------------------------------------- 40 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Shareholders and Board of Trustees of MassMutual Participation Investors We have audited the accompanying statement of assets and liabilities of MassMutual Participation Investors (the Trust), including the schedule of investments, as of December 31, 2007, and the related statements of operations and cash flows for the year then ended, the statements of changes in net assets for each of the years in the two-year period then ended and the financial highlights for each of the years in the four-year period then ended. These financial statements and financial highlights are the responsibility of the Trust's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. The financial highlights for the year ended December 31, 2003 was audited by other independent registered public accountants whose report, dated February 6, 2004, expressed an unqualified opinion on those financial highlights. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of December 31, 2007 by counting securities at the custodian and by correspondence with the custodian, or by other appropriate auditing procedures. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MassMutual Participation Investors as of December 31, 2007, and the results of its operations, its cash flows, the changes in its net assets, and the financial highlights for the years described above, in conformity with accounting principles generally accepted in the United States of America. KPMG LLP Boston, Massachusetts February 11, 2008 -------------------------------------------------------------------------------- 41 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- INTERESTED TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ ROGER W. CRANDALL* (43) Trustee 3 years/ Executive Vice President and 2 Trustee, Chairman (since (since 2005) 1 year, Chief Investment Officer 2005), President (2003- 2005), Massachusetts Mutual Life 10 months (since 2005) and Co-Chief and Vice President Insurance Company Operating Officer (since (2002-2003), of the Trust; 1295 State Street Chairman 1 year/ 2007) of MassMutual; and Director (since 2004), Babson Springfield, MA 01111 (since 2005) 7 months Chairman (since 2005), Capital Europe Limited (an President (2006-2007) and institutional debt-fund Chief Executive Officer manager); Director (since (since 2006), Vice Chairman 2004), Babson Capital Guernsey (2005), Member of the Board Limited (an investment of Managers (since 2004), management company); Member of the Board of Non-Executive Director (since Directors (2003-2004), and 2005), Baring Asset Management Managing Director of Babson Limited (an investment Capital (2000-2005). manager/ adviser); Chairman (since 2005), Cornerstone Real Estate Advisers LLC (an investment adviser); Director (since 2003), MassMutual Corporate Value Partners Limited (investment company); Director (since 2003), MassMutual Corporate Value Limited (investment company); Director (since 2005), MassMutual Holdings (Bermuda) Ltd. (holding company); Director (since 2004), MML Assurance, Inc. (a New York insurance company); Director (since 2005), Oppenheimer Acquisition Corp. (holding company); Director (since 2004), Jefferies Finance LLC (a finance company); Director (since 2004), Great Lakes LLC (investment company); Director (since 1999), SAAR Holdings CDO Ltd. (investment company); Chairman, Chief Executive Officer and Director (since 2006), MassMutual Capital Partners (investment company); Director (since 2006), Invicta Advisers LLC (derivative trading company); Director (since 2006), Invicta Capital LLC (derivative trading company); Director (since 2006), Invicta Credit LLC (derivative trading company); Director (since 2006), Invicta Holdings LLC (derivative trading company); Director (since 2006), Director (since 2006), MassMutual International LLC (holding company); Trustee (since 2003), President (2003-2005), and Chairman (since 2005), MMCI Subsidiary Trust and MMPI Subsidiary Trust; and Trustee (since 2005), Chairman (since 2005), President (2003-2005), and Vice President (2002-2003), of MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). * Mr. Crandall is classified as an "interested person" of the Trust and Babson Capital (as defined in the Investment Company Act of 1940, as amended) because of his position as an Officer of the Trust; and Chairman, Chief Executive Officer, and Member of the Board of Managers of Babson Capital. ------------------------------------------------------------------------------------------------------------------------------------ 42 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- INTERESTED TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ ROBERT E. JOYAL* (63) Trustee 3 years/ President (2001-2003) of 57 President (1999-2003) and (since 2003) 10 months Babson Capital. Trustee (since 2003), of the MassMutual Participation Trust; Director (since 2006), Investors Jefferies Group, Inc. 1500 Main Street (financial services); Director Suite 600 (since 2003), Pemco Aviation P.O. Box 15189 Group, Inc. (aircraft Springfield, MA 01115-5189 maintenance and overhaul); Director (since 2007), Scottish Re Group Ltd. (global life reinsurance specialist); Trustee (since 2003), MassMutual Select Funds, formerly MassMutual Institutional Funds, (an open-end investment company advised by MassMutual); Trustee (since 2003), MML Series Investment Fund (an open-end investment company advised by MassMutual); Trustee (1998- 2003), Senior Vice President (1998-2001) and President (2001-2003), MMCI Subsidiary Trust and MMPI Subsidiary Trust; and President (1999- 2003), Trustee (since 2003), MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). * Mr. Joyal retired as President of Babson Capital in June 2003. In addition and as noted above, Mr. Joyal is a director of Jefferies Group, Inc., which has a wholly-owned broker-dealer subsidiary that may execute portfolio transactions and/or engage in principal transactions with the Trust, other investment companies advised by Babson Capital or any other advisory accounts over which Babson Capital has brokerage placement discretion. Accordingly, the Trust has determined to classify Mr. Joyal as an "interested person" of the Trust and Babson Capital (as defined in the Investment Company Act of 1940, as amended). ------------------------------------------------------------------------------------------------------------------------------------ 43 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- INDEPENDENT TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ WILLIAM J. BARRETT (68) Trustee 2 years/ President (since 2002), 2 Trustee (since 2006), MassMutual (since 2006) 10 months Barrett-Gardner Associates, MassMutual Corporate Investors Participation Investors Inc. (investments); and Senior (a closed-end investment 1500 Main Street Vice President (1976-2002), company advised by Babson Suite 600, P.O. Box 15189 Janney Montgomery Scott Capital). Springfield, MA 01115-5189 LLC (investments). DONALD E. BENSON (77) Trustee 3 years/ Executive Vice President 2 Director (since 1997), MAIR MassMutual (since 1988) 10 months and Director (since 1992), Holdings, Inc. (commuter Participation Investors Marquette Financial airline holding company); 1500 Main Street Companies (financial services); Director (since 1997), First Suite 600, P.O. Box 15189 Partner (since 1996), Benson California Financial Group Springfield, MA 01115-5189 Family Limited Partnership Inc. (bank holding company); No. 1 and Benson Family and Trustee (since 1986), Limited Partnership No. 2 MassMutual Corporate Investors (investment partnerships); and (closed-end investment company Partner (1987-2004), Benson, advised by Babson Capital). Pinckney, Oates Partnership (building partnership) ------------------------------------------------------------------------------------------------------------------------------------ 44 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- INTERESTED TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ MICHAEL H. BROWN (51) Trustee 1 year/ Private Investor; and 2 Trustee (since 2005), MassMutual (since 2005) 10 months Managing Director (1994- MassMutual Corporate Investors Participation Investors 2005), Morgan Stanley. (a closed-end investment 1500 Main Street company advised by Babson Suite 600, P.O. Box 15189 Capital); Independent Director Springfield, MA 01115-5189 (since 2006), Invicta Holdings LLC (a derivative trading company). DONALD GLICKMAN (74) Trustee 3 years/ Chairman (since 1992), Donald 2 Director (since 1984), Monro MassMutual (since 1992) 10 months Glickman and Company, Muffler Brake, Inc. Participation Investors Inc. (private investments); (automobile repair service); 1500 Main Street and Partner (since 1992), Director (since 1998), MSC Suite 600, P.O. Box 15189 J.F. Lehman & Co. (private Software, Corp. (simulation Springfield, MA 01115-5189 investments). software); and Trustee (since 1992), MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). ------------------------------------------------------------------------------------------------------------------------------------ 45 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- INDEPENDENT TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ MARTIN T. HART (72) Trustee 3 years/ Private Investor; and 2 Director (since 2004), Texas MassMutual (since 1991) 1 year, President and Director Roadhouse, Inc. (operates Participation Investors 10 months (since 1983), H Investment restaurant chain); Director 1500 Main Street Company LLC (family (since 1999), ValueClick Inc. Suite 600, P.O. Box 15189 partnership). (internet advertising Springfield, MA 01115-5189 company); Director (since 2002), Spectranetics Corp. (medical device company); and Trustee (since 1991), MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). CORINE T. NORGAARD (70) Trustee 3 years/ President, (2004-2005), 34 Trustee (since 2005), MML MassMutual (since 1998) 2 years, Thompson Enterprises Real Series Investment Fund II (an Participation Investors 10 months Estate Investment; and Dean open-end investment company 1500 Main Street (1996-2004), Barney School advised by MassMutual); Suite 600, P.O. Box 15189 of Business, University of Trustee (since 2004), Springfield, MA 01115-5189 Hartford. MassMutual Premier Funds, formerly The DLB Fund Group (an open-end investment company advised by MassMutual); Trustee (since 1993), ING Series Fund (investment company); Director (since 1992), ING Variable Series Fund; and Trustee (since 1998), MassMutual Corporate Investors (a closed-end investment company advised by Babson Capital). MALEYNE M. SYRACUSE (51) Trustee 6 months/ Managing Director (2000- Trustee (since 2007), MassMutual (since 2007) 4 months* 2007), JP Morgan Securities, MassMutual Corporate Investors Participation Investors Inc. (a closed-end investment 1500 Main Street company advised by Babson Suite 600, P.O. Box 15189 Capital). Springfield, MA 01115-5189 * Ms. Syracuse was appointed by the Board of Trustees to fill a newly created board seat on October 19, 2007. ------------------------------------------------------------------------------------------------------------------------------------ 46 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- OFFICERS OF THE TRUST PRINCIPAL POSITION OCCUPATION(S) NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST ADDRESS THE TRUST OF TIME SERVED 5 YEARS ------------------------------------------------------------------------------------------------------------------------------------ CLIFFORD M. NOREEN (50) President 1 year/ President (since 2005), Vice President (1993-2005) of the Trust; MassMutual 7 months Vice Chairman (since 2007),; Member of the Board of Managers Participation Investors (since 2006), and Managing Director (since 2000) of Babson 1500 Main Street Capital; Trustee (since 2005), and President (since 2005) MMCI Suite 600, P.O. Box 15189 Subsidiary Trust and MMPI Subsidiary Trust; and President (since Springfield, MA 01115-5189 2005), Vice President (1993-2005), MassMutual Corporate Investors. RODNEY J. DILLMAN (55) Vice 1 year/ Vice President, Secretary, and Chief Legal Officer (since 2006) MassMutual President, 7 months of the Trust; Vice President and Associate General Counsel (since Participation Investors Secretary, and 2000) of MassMutual; General Counsel and Secretary (since 2006) 1500 Main Street Chief Legal of Babson Capital; Secretary (since 2006), MMCI Subsidiary Trust Suite 600, P.O. Box 15189 Officer and MMPI Subsidiary Trust; and Vice President, Secretary, and Springfield, MA 01115-5189 Chief Legal Officer (since 2006), MassMutual Corporate Investors. JAMES M. ROY (45) President 1 year/ Vice President and Chief Financial Officer (since 2005), MassMutual and Chief 7 months Treasurer (2003-2005), and Associate Treasurer (1999-2003) of the Participation Investors Financial Trust; Managing Director (since 2005), and Director (2000-2005) 1500 Main Street Officer of Babson Capital; Trustee (since 2005), Treasurer (since 2005), Suite 600, P.O. Box 15189 and Controller (2003-2005), MMCI Subsidiary Trust and MMPI Springfield, MA 01115-5189 Subsidiary Trust; and Vice President and Chief Financial Officer (since 2005), Treasurer (2003-2005) and Associate Treasurer (1999-2003), MassMutual Corporate Investors. JOHN T. DAVITT, JR. (40) Comptroller 1 year/ Comptroller (since 2001) of the Trust; Director (since 2000) of MassMutual 7 months Babson Capital; Controller (since 2005), MMCI Subsidiary Trust Participation Investors and MMPI Subsidiary Trust; and Comptroller (since 2001), 1500 Main Street MassMutual Corporate Investors. Suite 600, P.O. Box 15189 Springfield, MA 01115-5189 MELISSA M. LAGRANT (34) Chief 1 year/ Chief Compliance Officer (since 2006) of the Trust; Managing MassMutual Compliance 7 months Director (since 2005) of Babson Capital; Vice President and Participation Investors Officer Senior Compliance Trading Manager (2003-2005), Loomis, Sayles & 1500 Main Street Company, L.P.; Assistant Vice President-Business Risk Management Suite 600, P.O. Box 15189 Group (2002-2003), and Assistant Vice President-Investment Springfield, MA 01115-5189 Compliance (2001-2002), Zurich Scudder Investments/Deutsche Asset Management; and Chief Compliance Officer (since 2006), MassMutual Corporate Investors. RONALD S. TALAIA (39) Treasurer 1 year/ Treasurer (since 2006) of the Trust; Director (since 2001) of MassMutual 7 months Babson Capital; and Treasurer (since 2006), MassMutual Corporate Participation Investors Investors. Vice 1500 Main Street Suite 600, P.O. Box 15189 Springfield, MA 01115-5189 ------------------------------------------------------------------------------------------------------------------------------------ 47 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- THIS PAGE WAS INTENTIONALLY LEFT BLANK. -------------------------------------------------------------------------------- 48 MASSMUTUAL PARTICIPATION INVESTORS -------------------------------------------------------------------------------- MEMBERS OF THE BOARD OF DIVIDEND REINVESTMENT AND CASH TRUSTEES REPURCHASE PLAN LEFT TO RIGHT: MassMutual Participation Investors Donald Glickman offers a Dividend Reinvestment and Cash Chairman, Purchase Plan. The Plan provides a Donald Glickman & Company, Inc. simple and automatic way for shareholders to add to their holdings in Robert E. Joyal the Trust through the receipt of Retired President, dividend shares issued by the Trust or Babson Capital Management LLC through the reinvestment of cash dividends in Trust shares purchased in William J. Barrett the open market. The dividends of each President, shareholder will be automatically Barrett-Gardner Associates, Inc. reinvested in the Trust by Shareholder Financial Services Inc., the Transfer Michael H. Brown Agent, in accordance with the Plan, Private Investor unless such shareholder elects not to participate by providing written notice Donald E. Benson* to the Transfer Agent. A shareholder may Executive Vice President terminate his or her participation by and Director, notifying the Transfer Agent in writing. Marquette Financial Companies Participating shareholders may also make Dr. Corine T. Norgaard* additional contributions to the Plan President, from their own funds. Such contributions Thompson Enterprises may be made by personal check or other Real Estate Investment means in an amount not less than $100 nor more than $5,000 per quarter. Cash Roger W. Crandall contributions must be received by the Executive Vice President, Transfer Agent at least five days (but Chief Investment Officer and no more then 30 days) before the payment Co-Chief Operating Officer date of a dividend or distributions. Massachusetts Mutual Life Cash contributions must be received by Insurance Company the Transfer Agent at least five days (but no more then 30 days) before the Martin T. Hart* payment date of a dividend or Private Investor distributions. Maleyne M. Syracuse Whenever the Trust declares a dividend Private Investor payable in cash or shares, the Transfer Agent, acting on behalf of each *Member of the Audit Committee participating shareholder, will take the dividend in shares only if the net asset OFFICERS value is lower than the market price plus an estimated brokerage commission Roger W. Crandall as of the close of business on the Chairman valuation day. The valuation day is the last day preceding the day of dividend Clifford M. Noreen payment. When the dividend is to be President taken in shares, the number of shares to be received is determined by dividing James M. Roy the cash dividend by the net asset value Vice President & Chief as of the close of business on the Financial Officer valuation date or, if greater than net asset value, 95% of the closing share Rodney J. Dillman price. If the net asset value of the Vice President, Secretary shares is higher than the market value & Chief Legal Officer plus an estimated commission, the Transfer Agent, consistent with Jill A. Fields obtaining the best price and execution, Vice President will buy shares on the open market at current prices promptly after the Michael P. Hermsen dividend payment date. Vice President The reinvestment of dividends does not, Mary Wilson Kibbe in anyway, relieve participating Vice President shareholders of any federal, state or local tax. For federal income tax Michael L. Klofas purposes, the amount reportable in Vice President respect of a dividend received in newly-issued shares of the Trust will be Richard E. Spencer, II the fair market value of the shares Vice President received, which will be reportable as ordinary income and/or capital gains. Ronald S. Talaia Treasurer As compensation for its services, the Transfer Agent receives a fee of 5% of John T. Davitt, Jr. any dividend and cash contribution (in Comptroller no event in excess of $2.50 per distribution per shareholder.) Melissa M. LaGrant Chief Compliance Officer Any questions regarding the Plan should be addressed to Shareholder Financial Services, Inc., Agent for MassMutual Participation Investors' Dividend Reinvestment and Cash Purchase Plan, P.O. Box 173673, Denver, CO 80217-3673. -------------------------------------------------------------------------------- [LOGO] MASSMUTUAL PARTICIPATION INVESTORS P12597 ITEM 2. CODE OF ETHICS. The Registrant adopted a Code of Ethics for Senior Financial Officers (the "Code") on October 17, 2003, which is available on the Registrant's website at www.babsoncapital.com/mpv. During the period covered by this Form N-CSR, there were no amendments to, or waivers from, the Code. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. The Registrant's Board of Trustees has determined that Mr. Donald E. Benson, a Trustee of the Registrant and a member of its Audit Committee, is an audit committee financial expert. Mr. Benson is "independent" for purposes of this Item 3 as required by applicable regulation. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. FEES BILLED TO THE REGISTRANT KPMG LLP KPMG LLP Year Ended Year Ended December 31, December 31, 2007 2006 ---------- ---------- Audit Fees $ 48,000 $ 35,500 Audit-Related Fees 5,700 5,400 Tax Fees 37,200 28,500 All Other Fees 0 0 ---------- ---------- Total Fees $ 90,900 $ 69,400 ========== ========== NON-AUDIT FEES BILLED TO BABSON CAPITAL AND MASSMUTUAL KPMG LLP KPMG LLP Year Ended Year Ended December 31, December 31, 2007 2006 ---------- ---------- Audit-Related Fees $1,102,280 $ 912,760 Tax Fees 0 0 All Other Fees 75,000 0 ---------- ---------- Total Fees $1,177,280 $ 912,760 ========== ========== The category "Audit Related Fees" reflects fees billed by KPMG for various non-audit and non-tax services rendered to the Registrant, Babson Capital Management LLC ("Babson Capital") and Massachusetts Mutual Life Insurance Company ("MassMutual"), such as SAS 70 review, agreed upon procedures reports. Preparation of Federal, state and local income tax returns and compliance work are representative of the fees billed in the "Tax Fees" category. The category "All Other Fees" represents fees billed by KPMG for tax consulting rendered to Babson Capital and MassMutual. The Sarbanes-Oxley Act of 2002 and its implementing regulations allows the Registrant's Audit Committee to establish a pre-approval policy for certain services rendered by the Registrant's independent accountants. During 2007, the Registrant's Audit Committee approved all of the services rendered to the Registrant by KPMG and did not rely on such a pre-approval policy for any such services. The Audit Committee reviewed the aggregate fees billed for professional services rendered by KPMG for the Registrant and for the non-audit services provided to Babson Capital, and Babson Capital's parent, MassMutual. As part of this review, the Audit Committee considered whether the provision of such non-audit services were compatible with maintaining the principal accountant's independence. The 2006 fees billed represent final 2006 amounts, which may differ from the preliminary figures available as of the filing date of the Trust's 2007 Annual Form N-CSR and includes, among other things, fees for services that may not have been billed as of the filing date of the Trust's 2007 Annual Form N-CSR, but are now properly included in the 2006 fees billed to the Trust, Babson Capital, and MassMutual. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. The Registrant maintains an Audit Committee composed exclusively of Trustees of the Registrant who qualify as "independent" Trustees under the current listing standards of the New York Stock Exchange and the rules of U.S. Securities and Exchange Commission. The Committee operates pursuant to a written Audit Committee Charter, which is available (1) on the Registrant's website, www.babsoncapital.com/mpv; and (2) without charge, upon request, by calling, toll-free 866-399-1516. The current members of the Audit Committee are Donald E. Benson, Martin T. Hart, and Corine T. Norgaard. ITEM 6. SCHEDULE OF INVESTMENTS Not applicable for this filing. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED END MANAGEMENT INVESTMENT COMPANIES. The Registrant's Board of Trustees delegated proxy voting responsibilities relating to voting securities held by the Registrant to its investment adviser, Babson Capital Management LLC ("Babson Capital"). A summary of Babson Capital's proxy voting policies and procedures is set forth below. Summary of Babson Capital's Proxy Voting Policy ----------------------------------------------- Babson Capital views the voting of proxies as part of its investment management responsibility and believes, as a general principle, that proxies should be voted solely in the best interests of its clients (i.e. in a manner it believes is most likely to enhance the economic value of the underlying securities and cliet accounts). To implement this general principle, it is Babson Capital's policy to generally vote proxies in accordance with the recommendations of Institutional Shareholder Services ("ISS"), a recognized authority on proxy voting and corporate governance, or, in cases where ISS has not made any recommendations with respect to a proxy, in accordance with ISS's proxy voting guidelines. Babson Capital recognizes, however, that there may be times when Babson Capital believes that it will be in the best interests of clients holding the securities to (1) vote against ISS's recommendations or (2) in cases where ISS has not provided Babson Capital with any recommendations with respect to a proxy, vote against ISS's proxy voting guidelines. Babson Capital may vote, in whole or part, against ISS's recommendations or ISS's proxy voting guidelines, as applicable. The procedures set forth in the Policy are designed to ensure that votes against ISS's recommendations or proxy voting guidelines have been made in the best interests of clients and are not the result of any material conflict of interest (a "Material Conflict"). Summary of Babson Capital's Proxy Voting Procedures --------------------------------------------------- Babson Capital has established a Proxy Committee that is responsible for the implementation and governance of the Policy and designated Proxy Administrators who will receive and post proxies for voting with ISS. In accordance with the Policy, Babson Capital will generally vote all client proxies in accordance with ISS's recommendation or proxy voting guidelines, unless a person authorized by the Proxy Committee (each a "Proxy Analyst"), the Proxy Committee or a designated member of the Proxy Committee determines that it is in the clients' best interest to vote against ISS's recommendation or proxy voting guidelines. In these cases, Babson Capital will vote against ISS's recommendation or proxy voting guidelines, so long as no other Proxy Analyst reviewing such proxy disagrees with such recommendation, and no known Material Conflict is identified by the Proxy Analyst(s) or the Proxy Administrator. Otherwise, the proxy is to be submitted to a member of the Proxy Committee, who shall determine how to vote the proxy unless (i) the Proxy Analyst or Proxy Administrator has identified a Babson Capital Material Conflict or (ii) said Proxy Committee member has identified a Material Conflict pertinent to him or herself or a Babson Capital material conflict. In such cases, the proxy shall be submitted to the Proxy Committee, which may authorize a vote against ISS's recommendation or proxy voting guidelines only if the Proxy Committee determines that such vote is in the clients' best interests. No employee, officer, director, or Board of Managers Member of Babson Capital or its affiliates (other than those assigned such responsibilities under the Policy) may influence how Babson Capital votes any client proxy, unless such person has been requested to provide such assistance by a Proxy Analyst or Proxy Committee member and has disclosed any known Material Conflict. Any pre-vote communications prohibited by the Policy shall be reported to the Proxy Committee member prior to voting and to Babson Capital's General Counsel. Obtaining a Copy of the Policy ------------------------------ The full text of Babson Capital's Policy is available (1) without charge, upon request, by calling 1-866-399-1516 or (2) on the Registrant's website, www.babsoncapital.com/mpv. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. The following disclosure item is made as of the date of this Form N-CSR unless otherwise indicated. PORTFOLIO MANAGER. Clifford M. Noreen serves as the President of the Registrant (since 2005) and as its Portfolio Manager. Mr. Noreen began his service to the Registrant in 1993 as a Vice President. With over 25 years of industry experience, Mr. Noreen is Vice Chairman, a Managing Director and a Member of the Board of Managers of Babson Capital Management LLC ("Babson Capital") and head of Babson Capital's Corporate Securities Group, where he oversees public equities and corporate credit related investments, including public and private bonds, mezzanine, and private equity investments, and structured credit products. Mr. Noreen joined Massachusetts Mutual Life Insurance Company ("MassMutual"), Babson Capital's parent company, in 1985 and began leading its High Yield Team in 1992, where he was responsible for oversight of all public high yield portfolios. In 2004, Mr. Noreen assumed responsibility for Babson Capital's Public Corporate Credit Group, which included the Investment Grade and High Yield Institutional Fixed Income teams. Mr. Noreen also presently serves as President of MassMutual Corporate Investors, another closed-end registered investment company advised by Babson Capital. Mr. Noreen holds a B.A. from the University of Massachusetts and an M.B.A from American International College. PORTFOLIO MANAGEMENT TEAM. Mr. Noreen has primary responsibility for overseeing the investment of the Registrant's portfolio, with the day-to-day investment management responsibility of the Registrant's portfolio being shared with the following Babson Capital investment professionals (together with the Portfolio Manager, the "Portfolio Team"). Michael P. Hermsen, Michael L. Klofas, and Richard E. Spencer II are each a Vice President of the Registrant and a Managing Director of Babson Capital. Together they are responsible for managing Babson Capital's Mezzanine Investment and Private Equity Investments Team within the Corporate Securities Group, which is responsible for finding, analyzing, negotiating and servicing mezzanine private placement securities for the Registrant. Mr. Hermsen joined MassMutual in 1990 and has been an officer of the Registrant since 1992. Previously, he worked at Teachers Insurance and Annuity Association where he was a generalist private placement analyst. At MassMutual and then Babson Capital, Mr. Hermsen has analyzed and invested in traditional private placements, high yield public and private bonds, and leveraged bank loans. He has also been responsible for managing a small portfolio of distressed investments. Since 1993, he has focused on originating, analyzing, structuring and documenting mezzanine and private equity investments. He holds a B.A. from Bowdoin College and an M.B.A. from Columbia University. Mr. Klofas joined MassMutual in 1988 and has been an officer of the Registrant since 1989. Prior to joining MassMutual, he spent two years at a small venture capital firm and two years at a national public accounting firm. At MassMutual and then Babson Capital, Mr. Klofas has analyzed and invested in traditional private placements and high yield public bonds. He also spent four years leading Babson Capital's workout and restructuring activities. Since 1993, he has focused on originating, analyzing, structuring and documenting mezzanine and private equity investments. Mr. Klofas holds a B.A. from Brandeis University and an M.B.A. from Babson College as well as a Certified Public Accountant designation. Mr. Spencer joined MassMutual in 1989 after three years as a corporate loan analyst at a major New England bank. He has been an officer of Registrant since 1990. At MassMutual and then Babson Capital, Mr. Spencer has analyzed and invested in traditional private placements, high yield public and private bonds, leveraged bank loans, mezzanine debt and private equity. From 1993 to 1999, he was the lead restructuring professional at Babson Capital. Since 1999, Mr. Spencer has been focused on the origination, analysis, structuring and documentation of mezzanine and private equity investments. He holds a B.A. from Bucknell University and an M.B.A. from the State University of New York at Buffalo. Jill A. Fields is responsible for the day-to-day management of the Registrant's public high yield and investment grade fixed income portfolio. Ms. Fields has been a Vice President of the Registrant since 2006. Ms. Fields is a Managing Director of Babson Capital with over 20 years of industry experience in high yield total return, structured credit, leveraged loans and private placemet investing. Prior to joining Babson Capital in 1997, she was a credit analyst at Shawmut National Bank, and the Director of Corporate Bond Research at Hartford Life Insurance Group. Ms. Fields holds a B.S. from Pennsylvania State University and an M.B.A. from the University of Connecticut. OTHER ACCOUNTS MANAGED BY THE PORTFOLIO TEAM. The members of the Registrant's Portfolio Team also have primary responsibility for the day-to-day management of other Babson Capital advisory accounts, including, among others, closed-end and open-end investment companies, private investment funds, MassMutual-affiliated accounts, as well as separate accounts for institutional clients. These advisory accounts are identified below. NUMBER OF ACCOUNTS APPROXIMATE TOTAL WITH ASSET SIZE OF NUMBER APPROXIMATE PERFORMANCE- PERFORMANCE- PORTFOLIO ACCOUNT OF TOTAL ASSET BASED BASED ADVISORY TEAM CATEGORY ACCOUNTS SIZE(A) ADVISORY FEE FEE ACCOUNTS(A) ------------ --------------------- -------- ------------ ------------ -------------- Clifford M. Registered Investment Noreen(B) Companies 1 $251.2 million 0 N/A ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 1 $42.2 million 1 $42.2 million ----------------------------------------------------------------------------------------- Other Accounts 0 N/A 0 N/A ----------------------------------------------------------------------------------------- Jill A. Registered Investment Fields Companies 3 $879.1 million 0 N/A ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 1 $55.6 million 1 $55.6 million ----------------------------------------------------------------------------------------- Other Accounts 5(C) $1.8 billion 0 N/A ----------------------------------------------------------------------------------------- Michael P. Registered Investment Hermsen Companies 1 $251.2 million 0 N/A ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 5 $403.5 million 5 $403.5 million ----------------------------------------------------------------------------------------- Other Accounts 1(D) $1.5 billion N/A N/A ----------------------------------------------------------------------------------------- Michael L. Registered Investment Klofas Companies 1 $251.2 million 0 N/A ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 5 $403.5 million 5 $403.5 million ----------------------------------------------------------------------------------------- Other Accounts 1(D) $1.5 billion N/A N/A ----------------------------------------------------------------------------------------- Richard E. Registered Investment Spencer II Companies 1 $251.2 million 0 N/A ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 5 $403.5 million 5 $403.5 million ----------------------------------------------------------------------------------------- Other Accounts 1(D) $1.5 billion N/A N/A (A) Account asset size has been calculated as of December 31, 2007. (B) Mr. Noreen, as the head of Babson Capital's Corporate Securities Group, has overall responsibility for all corporate credit related investments, including public and private bonds, mezzanine, and private equity investments, as well as structured credit products managed by Babson Capital. Except for the accounts noted in the table above, Mr. Noreen is not primarily responsible for the day-to-day management of the other accounts managed by Babson Capital's Corporate Securities Group. (C) Ms. Fields manages approximately $960 million of the general investment account of Massachusetts Mutual Life Insurance Company. These assets are represented as one account in the table above. (D) The listed account and managed assets represent that portion of the general investment account of MassMutual and C.M. Life Insurance Company for which an individual Portfolio Team member has primary day-to-day responsibility. As of December 31, 2007, Babson Capital's total general investment account assets under management were $57.7 billion dollars. MATERIAL CONFLICTS OF INTEREST. The potential for material conflicts of interest may exist as the members of the Portfolio Team have responsibilities for the day-to-day management of multiple accounts. These conflicts may be heightened to the extent the individual, Babson Capital and/or an affiliate has an investment in one or much of such accounts or an interest in the performance of such accounts. Babson Capital has identified (and summarized below) areas where material conflicts of interest are most likely to arise, and has adopted policies and procedures that it believes are reasonably designed to address such conflicts. It is possible that an investment opportunity may be suitable for both the Registrant and other accounts managed by a member of the Portfolio Team, but may not be available in sufficient quantities for both the Registrant and the other accounts to participate fully. Similarly, there may be limited opportunity to sell an investment held by the Registrant and another account. A conflict may arise where a member of the Portfolio Team may have an incentive to treat an account preferentially as compared to the Registrant because the account pays Babson Capital a performance-based fee or a member of the Portfolio Team, Babson Capital, or an affiliate has an interest in the account. Babson Capital has adopted an investment allocation policy and trade allocation procedures to address allocation of portfolio transactions and investment opportunities across multiple clients. These policies are designed to achieve fair and equitable treatment of all clients over time, and specifically prohibit allocations based on performance of an account, the amount or structure of the management fee, performance fee or profit sharing allocations, participation or investment by an employee, Babson Capital or an affiliate, whether the account is public, private, proprietary or third party. Additionally, the Registrant, MassMutual, Babson Capital, MassMutual Corporate Investors, and any private investment company advised or sub-advised by Babson Capital have obtained a blanket order from the Securities and Exchange Commission pursuant to Section 17(d), and Rule 17(d)-1 thereunder, of the Investment Company Act of 1940, as amended, which sets forth the conditions by which the entities can engage in private placement co-investment activities. Potential material conflicts of interest may also arise related to the knowledge and timing of the Registrant's trades, investment opportunities and broker selection. A member of the Portfolio Team will have information about the size, timing and possible market impact of the Registrant's trades. It is theoretically possible that a member of the Portfolio Team could use this information for his or her personal advantage or the advantage of other accounts he manages or the possible detriment of the Registrant. For example, a member of the Portfolio Team could front run a fund's trade or short sell a security for an account immediately prior to the Registrant's sale of that security. To address these conflicts, Babson Capital has adopted policies and procedures governing employees' personal securities transactions, the use of short sales, and trading between the Registrant and other accounts managed by members of the Portfolio Team or accounts owned by Babson Capital or its affiliates. With respect to securities transactions for the Registrant, Babson Capital determines which broker to use to execute each order, consistent with its duty to seek best execution of the transaction. Babson Capital manages certain other accounts, however, where Babson Capital may be limited by the client with respect to the selection of brokers or directed to trade such client's transactions through a particular broker. In these cases, trades for a fund in a particular security may be placed separately from, rather than aggregated with, such other accounts. Placing separate transaction orders for a security may temporarily affect the market price of the security or otherwise affect the execution of the transaction to the possible detriment of a fund or the other account(s) involved. Babson Capital has policies and procedures that address best execution and directed brokerage. Members of the Portfolio Team may also face other potential conflicts of interest in managing the Registrant, and the above is not a complete description of every conflict of interest that could be deemed to exist in managing both the Registrant and the other accounts listed above. COMPENSATION. The current Babson Capital compensation and incentive program for investment professionals is designed to attract, motivate and retain high-performing individuals. To help Babson Capital make informed decisions, the Company participates in annual compensation surveys of investment management firms using McLagan Partners, in addition to other industry specific resources. The firms selected for periodic peer-group comparisons typically have similar asset size or business mix. Annually, a review is conducted of total compensation versus market, to ensure that individual pay is competitive with the defined overall market. The compensation package for the members of the Portfolio Team is comprised of a market-driven base salary, a performance-driven annual bonus, and discretionary long-term incentives. The performance-driven bonus is based on the performance of the accounts managed by the members of the Portfolio Team relative to appropriate benchmarks, including with respect to the Registrant, to the Russell 2000 Index and Lehman Brothers U.S. Corporate High Yield Index. Performance of the Registrant, like other accounts Portfolio Team members manage, are evaluated on a pre-tax basis, and are reviewed over one and three-year periods, with greater emphasis given to the latter. There are other factors that affect bonus awards to a lesser extent, such as client satisfaction, teamwork, the assets under management, and the overall success of Babson Capital. Such factors are considered as a part of the overall annual bonus evaluation process by the management of Babson Capital. Long-Term incentives are designed to share with participants the longer-term value created in Babson Capital. Long-term incentives may take the form of deferred cash awards (including deferred cash awards that provide a portfolio manager with the economic equivalent of a "shareholder" interest in the firm by linking the value of the award to a formula which ties to the value of the business), and/or, in the case of a portfolio manager who manages a private investment fund with a performance fee, a deferred cash award or a direct profit sharing interest that results in the manager receiving amounts based on the amount of the performance fee paid by such fund. These long-term incentives vest over time and are granted annually, based upon the same criteria used to determine the performance-driven annual bonus detailed above. Because the Portfolio Team members are generally responsible for multiple accounts (including the Registrant), they are compensated on the overall performance of the accounts that they manage, rather than a specific account, except for the portion of compensation relating to any performance fee award. BENEFICIAL OWNERSHIP. As of December 31, 2007, members of the Portfolio Team beneficially owned the following dollar range of equity securities in the Registrant: DOLLAR RANGE OF BENEFICIALLY OWNED* PORTFOLIO TEAM EQUITY SECURITIES OF THE REGISTRANT ---------------------- ----------------------------------- Clifford M. Noreen None Jill A. Fields None Michael P. Hermsen $10,001-$50,000 Michael L. Klofas None Richard E. Spencer II None * Beneficial ownership has been determined in accordance with Rule 16a-1(a)(2) under the Securities Exchange Act of 1934, as amended. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. Not Applicable for this filing. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Not Applicable for this filing. ITEM 11. CONTROLS AND PROCEDURES. (a) The principal executive officer and principal financial officer of the Registrant evaluated the effectiveness of the Registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the "Act")) as of a date within 90 days of the filing date of this report and based on that evaluation have concluded that such disclosure controls and procedures are effective to provide reasonable assurance that material information required to be disclosed by the Registrant on Form N-CSR is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. (b) There were no changes in the Registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act) during the Registrant's second fiscal half-year that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting. ITEM 12. EXHIBITS. (a)(1) ANY CODE OF ETHICS, OR AMENDMENTS THERETO, THAT IS THE SUBJECT OF DISCLOSURE REQUIRED BY ITEM 2, TO THE EXTENT THAT THE REGISTRANT INTENDS TO SATISFY THE ITEM 2 REQUIREMENTS THROUGH THE FILING OF AN EXHIBIT. None. (a)(2) A SEPARATE CERTIFICATION FOR EACH PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER OF THE REGISTRANT AS REQUIRED BY RULE 30a-2 UNDER THE ACT. Attached hereto as EX-99.31.1 Attached hereto as EX-99.31.2 (a)(3) ANY WRITTEN SOLICITATION TO PURCHASE SECURITIES UNDER RULE 23c-1 UNDER THE 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 for this filing. (b) CERTIFICATIONS PURSUANT TO RULE 302-2(b) UNDER THE ACT. Attached hereto as EX-99.32 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): MassMutual Participation Investors ---------------------------------- By: /s/ Clifford M Noreen ---------------------------------- Clifford M Noreen, President ---------------------------------- Date: March 7, 2008 ---------------------------------- 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: /s/ Clifford M Noreen ---------------------------------- Clifford M Noreen, President ---------------------------------- Date: March 7, 2008 ---------------------------------- By: /s/ James M. Roy ---------------------------------- James M. Roy, Vice President, and Chief Financial Officer ---------------------------------- Date: March 7, 2008 ----------------------------------