SECURITIES & EXCHANGE COMMISSION Washington, D.C. 20549 ---------------------- SCHEDULE 13D* (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(a) NAVISTAR INTERNATIONAL CORPORATION (Name of Issuer) Common Stock (Title of Class of Securities) 63934E108 (CUSIP Number) Owl Creek Asset Management, L.P. 640 Fifth Avenue, 20th Floor, New York, NY 10019, Attn: Daniel Sapadin (212) 688-2550 (Name, address and telephone number of person authorized to receive notices and communications) January 24, 2008 (Date of event which requires filing of this statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), Rule 13d-1(f) or Rule 13d-1(g), check the following box [ ] NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent. *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). (Page 1 of 17 Pages) CUSIP No. 63934E108 13D Page 2 of 17 pages ------------------------------------------------------------------------------ (1) NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Owl Creek I, L.P. ----------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [ ] (b) [X] ----------------------------------------------------------------------------- (3) SEC USE ONLY ----------------------------------------------------------------------------- (4) SOURCE OF FUNDS ** WC, OO ----------------------------------------------------------------------------- (5) CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] ----------------------------------------------------------------------------- (6) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ----------------------------------------------------------------------------- NUMBER OF (7) SOLE VOTING POWER -0- SHARES -------------------------------------------------------------- BENEFICIALLY (8) SHARED VOTING POWER 129,400 OWNED BY -------------------------------------------------------------- EACH (9) SOLE DISPOSITIVE POWER -0- REPORTING -------------------------------------------------------------- PERSON WITH (10) SHARED DISPOSITIVE POWER 129,400 ----------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 129,400 ----------------------------------------------------------------------------- (12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ** [ ] ----------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.18% ----------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON ** PN ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 63934E108 13D Page 3 of 17 Pages ----------------------------------------------------------------------------- (1) NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Owl Creek II, L.P. ----------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [ ] (b) [X] ----------------------------------------------------------------------------- (3) SEC USE ONLY ----------------------------------------------------------------------------- (4) SOURCE OF FUNDS ** WC, OO ----------------------------------------------------------------------------- (5) CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] ----------------------------------------------------------------------------- (6) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ----------------------------------------------------------------------------- NUMBER OF (7) SOLE VOTING POWER -0- SHARES -------------------------------------------------------------- BENEFICIALLY (8) SHARED VOTING POWER 1,003,800 OWNED BY -------------------------------------------------------------- EACH (9) SOLE DISPOSITIVE POWER -0- REPORTING -------------------------------------------------------------- PERSON WITH (10) SHARED DISPOSITIVE POWER 1,003,800 ----------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,003,800 ----------------------------------------------------------------------------- (12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ** [ ] ----------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.43% ----------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON ** PN ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 63934E108 13D Page 4 of 17 pages ----------------------------------------------------------------------------- (1) NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Owl Creek Advisors, LLC ----------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [ ] (b) [X] ----------------------------------------------------------------------------- (3) SEC USE ONLY ----------------------------------------------------------------------------- (4) SOURCE OF FUNDS ** WC, OO ----------------------------------------------------------------------------- (5) CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] ----------------------------------------------------------------------------- (6) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ----------------------------------------------------------------------------- NUMBER OF (7) SOLE VOTING POWER -0- SHARES -------------------------------------------------------------- BENEFICIALLY (8) SHARED VOTING POWER 1,133,200 OWNED BY -------------------------------------------------------------- EACH (9) SOLE DISPOSITIVE POWER -0- REPORTING -------------------------------------------------------------- PERSON WITH (10) SHARED DISPOSITIVE POWER 1,133,200 ----------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,133,200 ----------------------------------------------------------------------------- (12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ** [ ] ----------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.61% ----------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON ** CO ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 63934E108 13D Page 5 of 17 Pages ----------------------------------------------------------------------------- (1) NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Owl Creek Asset Management, L.P. ----------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [ ] (b) [X] ----------------------------------------------------------------------------- (3) SEC USE ONLY ----------------------------------------------------------------------------- (4) SOURCE OF FUNDS ** WC, OO ----------------------------------------------------------------------------- (5) CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] ----------------------------------------------------------------------------- (6) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ----------------------------------------------------------------------------- NUMBER OF (7) SOLE VOTING POWER -0- SHARES -------------------------------------------------------------- BENEFICIALLY (8) SHARED VOTING POWER 3,135,554 OWNED BY -------------------------------------------------------------- EACH (9) SOLE DISPOSITIVE POWER -0- REPORTING -------------------------------------------------------------- PERSON WITH (10) SHARED DISPOSITIVE POWER 3,135,554 ----------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,135,554 ----------------------------------------------------------------------------- (12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ** [ ] ----------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 4.46% ----------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON ** PN ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 63934E108 13D Page 6 of 17 Pages ----------------------------------------------------------------------------- (1) NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Jeffrey A. Altman ----------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [ ] (b) [X] ----------------------------------------------------------------------------- (3) SEC USE ONLY ----------------------------------------------------------------------------- (4) SOURCE OF FUNDS ** WC, OO ----------------------------------------------------------------------------- (5) CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] ----------------------------------------------------------------------------- (6) CITIZENSHIP OR PLACE OF ORGANIZATION United States ----------------------------------------------------------------------------- NUMBER OF (7) SOLE VOTING POWER -0- SHARES -------------------------------------------------------------- BENEFICIALLY (8) SHARED VOTING POWER 4,268,754 OWNED BY -------------------------------------------------------------- EACH (9) SOLE DISPOSITIVE POWER -0- REPORTING -------------------------------------------------------------- PERSON WITH (10) SHARED DISPOSITIVE POWER 4,268,754 ----------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,268,754 ----------------------------------------------------------------------------- (12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ** [ ] ----------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.08% ----------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON ** IN ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 63934E108 13D Page 7 of 17 Pages Item 1. Security and Issuer. This Schedule 13D relates to the common stock, par value $.10 (the "Common Stock"), of Navistar International Corporation (the "Issuer"), a Delaware corporation whose principal executive offices are located at 4201 Winfield Road, P.O. Box 1488, Warrenville, Illinois 60555. Item 2. Identity and Background. (a) This statement is filed by: (i) Owl Creek I, L.P., a Delaware limited partnership ("Owl Creek I"), with respect to the shares of Common Stock beneficially owned by it; (ii) Owl Creek II, L.P., a Delaware limited partnership ("Owl Creek II"), with respect to the shares of Common Stock beneficially owned by it; (iii) Owl Creek Advisors, LLC, a Delaware limited liability company (the "General Partner"), with respect to the shares of Common Stock beneficially owned by Owl Creek I and Owl Creek II; (iv) Owl Creek Asset Management, L.P., a Delaware limited partnership (the "Investment Manager"), with respect to the shares of Common Stock beneficially owned by Owl Creek Overseas Fund, Ltd., an exempted company organized under the laws of the Cayman Islands ("Owl Creek Overseas"), and Owl Creek Socially Responsible Investment Fund, Ltd., an exempted company organized under the laws of the Cayman Islands ("SRIF"); and (v) Jeffrey A. Altman, with respect to shares of Common Stock beneficially owned by Owl Creek I, Owl Creek II, Owl Creek Overseas and SRIF. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons." Any disclosures made herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party. (b) The address of the principal office of the Reporting Persons is 640 Fifth Avenue, 20th Floor, New York, NY 10019. (c) The principal business of each of Owl Creek I and Owl Creek II is serving as a private investment limited partnership. The principal business of the General Partner is serving as general partner of Owl Creek I and Owl Creek II, respectively. The principal business of the Investment Manager is serving as Investment Manager to Owl Creek Overseas and SRIF. (d) None of the Reporting Persons have, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). CUSIP No. 63934E108 13D Page 8 of 17 Pages (e) None of the Reporting Persons have, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was, or is subject to, a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, Federal or State securities laws or finding any violation with respect to such laws. (f) Each of Owl Creek I, Owl Creek II and the Investment Manager is a limited partnership organized under the laws of the State of Delaware. The General Partner is a limited liability company organized under the laws of the State of Delaware. Mr. Altman is a United States citizen. Item 3. Source and Amount of Funds and Other Consideration. The shares of Common Stock were purchased on margin. The Reporting Person's margin transactions are with Morgan Stanley & Co., on such firm's usual terms and conditions. All or part of the shares of Common Stock beneficially owned by the Reporting Persons may from time to time be pledged with one or more banking institutions or brokerage firms as collateral for loans made by such bank(s) or brokerage firm(s) to Owl Creek I, Owl Creek II, Owl Creek Overseas or SRIF. Such loans bear interest at a rate based upon the broker's call rate from time to time in effect. Such indebtedness may be refinanced with other banks or broker-dealers. Item 4. Purpose of the Transaction. The purpose of the acquisition of the shares of Common Stock by the Reporting Persons is for investment, and the purchases of the shares of Common Stock by the Reporting Persons were made in the ordinary course of business and were not made for the purpose of acquiring control of the Company. Although the acquisition of the shares of Common Stock by the Reporting Persons is for investment purposes, the Reporting Persons have pursued and may in the future pursue further discussions with management in an effort to maximize long-term value for shareholders. Also, the Reporting Persons may at times hold discussions with management in order to ensure that the interests of current shareholders are protected. The Reporting Persons intend to dispose of the shares in one or more open market or privately negotiated transactions or otherwise, when and if an opportunity becomes available to do so, and may dispose of any or all of the shares at any time. The Reporting Persons have no present plan or proposal that would relate to or result in any of the matters set forth in subparagraphs (a)-(j) of Item 4 of Schedule 13D. The Reporting Persons intend to review their investment in the Issuer on a continuing basis and may engage in further discussions with management, the board of directors, other shareholders of the Issuer and other relevant parties concerning the business, operations, management, strategy, board composition and future plans of the Issuer. Depending on various factors including, without limitation, the Issuer's financial position and strategic direction, the outcome of the discussions and actions referenced above, actions taken by the Board of Directors, price levels of the Common Stock, other investment opportunities available to the Reporting Persons, conditions in the securities market and general economic and industry conditions, the Reporting Persons may in the future take such actions with respect to their investment in the Issuer as they deem appropriate including, without limitation, CUSIP No. 63934E108 13D Page 9 of 17 Pages purchasing additional Common Stock or selling some or all of their Common Stock, engaging in short selling of or any hedging or similar transactions with respect to the Common Stock, taking actions with respect to the Company's restructuring plan and/or otherwise changing their intention with respect to any and all matters referred to in Item 4 of Schedule 13D. Item 5. Interest in Securities of the Issuer. A. Owl Creek I, L.P. (a) Aggregate number of shares beneficially owned: 129,400. Percentage: 0.18% The percentages used herein and in the rest of Item 5 are calculated based upon the 70,236,415 shares of Common Stock issued and outstanding as of November 30, 2007 as reported by the Company in its Form 10-K for the fiscal year ended October 31, 2005, filed on December 10, 2007. (b) 1. Sole power to vote or direct vote: -0- 2. Shared power to vote or direct vote: 129,400 3. Sole power to dispose or direct the disposition: -0- 4. Shared power to dispose or direct the disposition: 129,400 (c) The acquisition dates, number of shares of Common Stock acquired and the price per share for all transactions by Owl Creek I in the Common Stock within the last 60 days, are set forth in Schedule A and are incorporated by reference. (d) Owl Creek Advisors, LLC, the general partner of Owl Creek I, has the power to direct the affairs of Owl Creek I, including decisions respecting the receipt of dividends from the shares and the disposition of the proceeds from the sale of the shares. Mr. Altman is the managing member of Owl Creek Advisors, LLC and in that capacity directs its operations. (e) Not applicable. B. Owl Creek II, L.P. (a) Aggregate number of shares beneficially owned: 1,003,800 Percentage: 1.43% (b) 1. Sole power to vote or direct vote: -0- 2. Shared power to vote or direct vote: 1,003,800 3. Sole power to dispose or direct the disposition: -0- 4. Shared power to dispose or direct the disposition: 1,003,800 (c) The acquisition dates, number of shares of Common Stock acquired and the price per share for all transactions by Owl Creek II in the Common Stock within the last 60 days, are set forth in Schedule A and are incorporated by reference. (d) Owl Creek Advisors, LLC, the general partner of Owl Creek II, has the power to direct the affairs of Owl Creek II, including decisions respecting the receipt of dividends from the shares and the disposition of the proceeds from the sale of the shares. Mr. Altman is the managing member of Owl Creek Advisors, LLC and in that capacity directs its operations. (e) Not applicable. CUSIP No. 63934E108 13D Page 10 of 17 Pages C. Owl Creek Advisors, LLC (a) Aggregate number of shares beneficially owned: 1,133,200 Percentage: 1.61% (b) 1. Sole power to vote or direct vote: -0- 2. Shared power to vote or direct vote: 1,133,200 3. Sole power to dispose or direct the disposition: -0- 4. Shared power to dispose or direct the disposition: 1,133,200 (c) Owl Creek Advisors, LLC did not enter into any transactions in the Common Stock of the Company within the last sixty days. However, Owl Creek Advisors, LLC is the general partner of Owl Creek I and Owl Creek II, and has the power to direct the affairs of Owl Creek I and Owl Creek II. The acquisition dates, number of shares of Common Stock acquired and the price per share for all transactions by Owl Creek I and Owl Creek II in the Common Stock within the last 60 days, are set forth in Schedule A and are incorporated by reference. (d) Owl Creek Advisors, LLC, as the general partner of Owl Creek I and Owl Creek II, has the power to direct the affairs of Owl Creek I and Owl Creek II, including decisions respecting the receipt of dividends from the shares and the disposition of the proceeds from the sale of the shares. Mr. Altman is the managing member of Owl Creek Advisors, LLC and in that capacity directs its operations. (e) Not applicable. D. Owl Creek Asset Management, L.P. (a) Aggregate number of shares beneficially owned: 3,135,554 Percentage: 4.46% (b) 1. Sole power to vote or direct vote: -0- 2. Shared power to vote or direct vote: 3,135,554 3. Sole power to dispose or direct the disposition: -0- 4. Shared power to dispose or direct the disposition: 3,135,554 (c) Owl Creek Asset Management, L.P. did not enter into any transactions in the Common Stock of the Company within the last sixty days. However, Owl Creek Asset Management, L.P. is the investment manager to Owl Creek Overseas and SRIF and has the power to direct the investment activities of Owl Creek Overseas and SRIF. The acquisition dates, number of shares of Common Stock acquired and the price per share for all transactions by Owl Creek Overseas and SRIF in the Common Stock within the last 60 days, are set forth in Schedule A and are incorporated by reference. (d) Owl Creek Asset Management, L.P., as the investment manager to Owl Creek Overseas and SRIF, has the power to direct the investment activities of Owl Creek Overseas and SRIF, including decisions respecting the receipt of dividends from the shares and the disposition of the proceeds from the sale of the shares. Mr. Altman is the managing member of the general partner of Owl Creek Asset Management, L.P. and in that capacity directs its operations. (e) Not applicable. CUSIP No. 63934E108 13D Page 11 of 17 Pages E. Jeffrey A. Altman (a) Aggregate number of shares beneficially owned: 4,268,754 Percentage: 6.08% (b) 1. Sole power to vote or direct vote: -0- 2. Shared power to vote or direct vote: 4,268,754 3. Sole power to dispose or direct the disposition: -0- 4. Shared power to dispose or direct the disposition: 4,268,754 (c) Mr. Altman did not enter into any transactions in the Common Stock of the Company within the last sixty days. The acquisition dates, number of shares of Common Stock acquired and the price per share for all transactions by Owl Creek I, Owl Creek II, Owl Creek Overseas and SRIF in the Common Stock within the last 60 days, are set forth in Schedule A and are incorporated by reference. (d) Not applicable. (e) Not applicable. Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Company. Except as described herein, there are no contracts, arrangements, understandings or relationships (legal or otherwise) among the persons named in Item 2 hereof and between such persons and any person with respect to any securities of the Issuer, including, but not limited to, transfer or voting of any other securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, divisions of profits or loss, or the giving or withholding of proxies. CUSIP No. 63934E108 13D Page 12 of 17 Pages Item 7. Materials to be Filed as Exhibits. Exhibit 1. Joint Filing Agreement CUSIP No. 63934E108 13D Page 13 of 17 Pages SIGNATURES After reasonable inquiry and to the best of knowledge and belief of the undersigned, the undersigned certify that the information set forth in this statement is true, complete and correct. DATED: January 31, 2008 /s/ JEFFREY A. ALTMAN --------------------- Jeffrey A. Altman, individually, and as managing member of Owl Creek Advisors, LLC, for itself and as general partner of Owl Creek I, L.P. and Owl Creek II L.P., and as managing member of the general partner of Owl Creek Asset Management, L.P., for itself and as investment manager to Owl Creek Overseas Fund, Ltd. and Owl Creek Socially Responsible Investment Fund, Ltd. CUSIP No. 63934E108 13D Page 14 of 17 pages Schedule A OWL CREEK I, L.P. Open market/ Price Date of Number of shares Cross per Transaction Purchased/(Sold) Transaction share ----------- ---------------- ----------- ----- 11/28/2007 1,500.00 O 49.62 12/1/2007 (1,800.00) C 51.95 12/7/2007 400.00 O 53.55 12/10/2007 200.00 O 55.62 12/10/2007 900.00 O 55.57 1/1/2008 (300.00) C 54.20 1/24/2008 900.00 O 48.47 1/24/2008 10,900.00 O 48.51 1/25/2008 9,100.00 O 48.48 1/29/2008 2,600.00 O 48.25 CUSIP No. 63934E108 13D Page 15 of 17 Pages OWL CREEK II, L.P. Open market/ Price Date of Number of shares Cross per Transaction Purchased/(Sold) Transaction share ----------- ---------------- ----------- ----- 11/28/2007 11,800.00 O 49.62 12/1/2007 (8,500.00) C 51.95 12/7/2007 1,800.00 O 53.55 12/10/2007 1,800.00 O 55.62 12/10/2007 6,700.00 O 55.57 1/1/2008 (18,300.00) C 54.20 1/24/2008 5,300.00 O 48.47 1/24/2008 84,400.00 O 48.51 1/25/2008 72,400.00 O 48.48 1/29/2008 20,600.00 O 48.25 CUSIP No. 63934E108 13D Page 16 of 17 Pages OWL CREEK OVERSEAS FUND, LTD. Open market/ Price Date of Number of shares Cross per Transaction Purchased/(Sold) Transaction share ----------- ---------------- ----------- ----- 11/28/2007 35,600.00 O 49.62 12/1/2007 13,100.00 C 51.95 12/7/2007 7,700.00 O 53.55 12/10/2007 5,300.00 O 55.62 12/10/2007 16,600.00 O 55.57 1/1/2008 23,400.00 C 54.20 1/24/2008 4,419.00 O 48.47 1/24/2008 252,400.00 O 48.51 1/25/2008 211,500.00 O 48.48 1/29/2008 73,400.00 O 48.25 CUSIP No. 63934E108 13D Page 17 of 17 Pages OWL CREEK SOCIALLY RESPONSIBLE INVESTMENT FUND, LTD. Open market/ Price Date of Number of shares Cross per Transaction Purchased/(Sold) Transaction share ----------- ---------------- ----------- ----- 11/28/2007 1,100.00 O 49.62 12/1/2007 (2,800.00) C 51.95 12/7/2007 100.00 O 53.55 12/10/2007 200.00 O 55.62 12/10/2007 800.00 O 55.57 1/1/2008 (4,800.00) C 54.20 1/24/2008 8,600.00 O 48.51 1/25/2008 7,600.00 O 48.48 1/29/2008 3,400.00 O 48.25 EXHIBIT 1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D may be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein and therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate. Dated: January 31, 2008 /s/ JEFFREY A. ALTMAN --------------------- Jeffrey A. Altman, individually, and as managing member of Owl Creek Advisors, LLC, for itself and as general partner of Owl Creek I, L.P. and Owl Creek II L.P., and as managing member of the general partner of Owl Creek Asset Management, L.P., for itself and as investment manager to Owl Creek Overseas Fund, Ltd. and Owl Creek Socially Responsible Investment Fund, Ltd.