View:
UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1)* NRG ENERGY, INC. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $0.01 Par Value Per Share - -------------------------------------------------------------------------------- (Title of Class of Securities) 629377508 --------- (CUSIP Number) December 31, 2004 ----------------- (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1(b) [X ] Rule 13d-1(c) [ ] Rule 13d-1(d) *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 on the remainder of this cover page shall not be deemed to be "filed" for the purpose 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 16 - ---------------------------- ------------------------------ CUSIP No. 629377508 13G Page 2 of 16 Pages - ---------------------------- ------------------------------ - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON S.A.C. Capital Advisors, LLC - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ---------------------------------------------------------- 6 SHARED VOTING POWER 5,718,615* (see Item 4) ---------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ---------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 5,718,615* (see Item 4 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,718,615* (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.5% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* 00 - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 2 of 16 - ----------------------- -------------------------------- CUSIP No. 629377508 13G Page 3 of 16 Pages ---------------------- -------------------------------- - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON S.A.C. Capital Management, LLC - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------- 6 SHARED VOTING POWER 5,718,615* (see Item 4) ----------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ----------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 5,718,615* (see Item 4) - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,718,615* (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.5% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* 00 - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 3 of 16 - --------------------------- -------------------------------- CUSIP No. 629377508 13G Page 4 of 16 Pages - --------------------------- -------------------------------- - ---------- --------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON S.A.C. Capital Associates, LLC - ---------- --------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Anguilla, British West Indies - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------- 6 SHARED VOTING POWER 5,309,575 (see Item 4) ----------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ----------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 5,309,575 (see Item 4) - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,309,575 (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.1% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* 00 - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 4 of 16 - -------------------------- --------------------------------- CUSIP No. 629377508 13G Page 5 of 16 Pages - -------------------------- --------------------------------- - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON S.A.C. Arbitrage Fund, LLC - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Anguilla, British West Indies - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------- 6 SHARED VOTING POWER 389,640* (see Item 4) ----------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ----------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 389,640* (see Item 4) - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 389,640* (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Less than 1% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* 00 - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 5 of 16 - ------------------------ --------------------------------- CUSIP No. 629377508 13G Page 6 of 16 Pages - ------------------------ --------------------------------- - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON S.A.C. MultiQuant Fund, LLC - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Anguilla, British West Indies - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------- 6 SHARED VOTING POWER 19,400 (see Item 4) ----------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ----------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 19,400 (see Item 4) - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 19,400 (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Less than 1% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* 00 - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 6 of 16 - -------------------------- ------------------------------- CUSIP No. 629377508 13G Page 7 of 16 Pages - -------------------------- ------------------------------- - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Sigma Capital Management, LLC - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------- 6 SHARED VOTING POWER 150,000 (see Item 4) ----------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ----------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 150,000 (see Item 4) - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 150,000 (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Less than 1% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* 00 - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 7 of 16 - ---------------------------- -------------------------------- CUSIP No. 629377508 13G Page 8 of 16 Pages - ---------------------------- -------------------------------- - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Sigma Capital Associates, LLC - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Anguilla, British West Indies - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------- 6 SHARED VOTING POWER 150,000 (see Item 4) ----------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ----------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 150,000 (see Item 4) - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 150,000 (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Less than 1% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* 00 - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 8 of 16 - ------------------------- -------------------------------------- CUSIP No. 629377508 13G Page 9 of 16 Pages - ------------------------- -------------------------------------- - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Steven A. Cohen - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a)| | (b)|X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------- 6 SHARED VOTING POWER 5,868,615* (see Item 4) ----------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 ----------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 5,868,615* (see Item 4) - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,868,615* (see Item 4) - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.7% (see Item 4) - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT Page 9 of 16 ITEM 1(A) NAME OF ISSUER: NRG Energy, Inc. ITEM 1(B) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 211 Carnegie Center Princeton, New Jersey 08540 ITEMS 2(A) NAME OF PERSON FILING: This statement is filed by: (i) S.A.C. Capital Advisors, LLC, ("SAC Capital Advisors") with respect to shares of common stock, $.01 par value per share ("Shares") beneficially owned by S.A.C. Capital Associates, LLC ("SAC Capital Associates"), S.A.C. Arbitrage Fund, LLC ("SAC Arbitrage") and S.A.C. MultiQuant Fund, LLC ("SAC MultiQuant"); (ii) S.A.C. Capital Management, LLC, ("SAC Capital Management") with respect to Shares beneficially owned by SAC Capital Associates, SAC Arbitrage and SAC MultiQuant; (iii) SAC Capital Associates with respect to Shares beneficially owned by it; (iv) SAC Arbitrage with respect to Shares beneficially owned by it; (v) SAC MultiQuant with respect to Shares beneficially owned by it; and (vi) Sigma Capital Management, LLC ("Sigma Capital Management") with respect to Shares beneficially owned by Sigma Capital Associates, LLC ("Sigma Capital Associates"); (vii) Sigma Capital Associates with respect to Shares beneficially owned by it; and (viii) Steven A. Cohen with respect to Shares beneficially owned by SAC Capital Advisors, SAC Capital Management, SAC Capital Associates, SAC Arbitrage, SAC MultiQuant, Sigma Capital Management and Sigma Capital Associates. ITEM 2(B) ADDRESS OF PRINCIPAL BUSINESS OFFICE: The address of the principal business office of (i) SAC Capital Advisors and Mr. Cohen is 72 Cummings Point Road, Stamford, Connecticut 06902, (ii) SAC Capital Management and Sigma Capital Management is 540 Madison Avenue, New York, New York 10022, and (iii) SAC Capital Associates, SAC MultiQuant, SAC Arbitrage and Sigma Capital Associates is P.O. Box 58, Victoria House, The Valley, Anguilla, British West Indies.. ITEM 2(C) CITIZENSHIP: SAC Capital Advisors, SAC Capital Management and Sigma Capital Management are Delaware limited liability companies. SAC Capital Associates, SAC MultiQuant, SAC Arbitrage and Sigma Capital Associates are Anguillan limited liability companies. Mr. Cohen is a United States citizen. Page 10 of 16 ITEM 2(D) TITLE OF CLASS OF SECURITIES: Common Stock, par value $0.01 per share ITEM 2(E) CUSIP NUMBER: 629377508 ITEM 3 Not Applicable ITEM 4 OWNERSHIP: The percentages used herein are calculated based upon the Shares issued and outstanding as of December 3, 2004, as reported on the Issuer's annual report on Form 10-K/A filed with the Securities and Exchange Commission by the Issuer for the fiscal year ended December 31, 2003 and taking into account the repurchase by the Issuer of 13 million Shares in a transaction reported on the Issuer's Form 8-K filed on December 21, 2004 filed with the Securities and Exchange Commission by the Issuer. As of the close of business on December 31, 2004: 1. S.A.C. Capital Advisors, LLC (a) Amount beneficially owned: 5,718,615* (b) Percent of class: 6.5% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 5,718,615* (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 5,718,615* 2. S.A.C. Capital Management, LLC (a) Amount beneficially owned: 5,718,615* (b) Percent of class: 6.5% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 5,718,615* (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 5,718,615* Page 11 of 16 3. S.A.C. Capital Associates, LLC (a) Amount beneficially owned: 5,309,575 (b) Percent of class: 6.1% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 5,309,575 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 5,309,575 4. S.A.C. Arbitrage Fund, LLC (a) Amount beneficially owned: 389,640* (b) Percent of class: Less than 1% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 389,640* (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 389,640* 5. S.A.C. MultiQuant Fund, LLC (a) Amount beneficially owned: 19,400 (b) Percent of class: Less than 1% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 19,400 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 19,400 6. Sigma Capital Management, LLC (a) Amount beneficially owned: 150,000 (b) Percent of class: Less than 1% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 150,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 150,000 7. Sigma Capital Associates, LLC (a) Amount beneficially owned: 150,000 (b) Percent of class: Less than 1% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 150,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 150,000 Page 12 of 16 8. Steven A. Cohen (a) Amount beneficially owned: 5,868,615* (b) Percent of class: 6.7% (c)(i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 5,868,615* (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 5,868,615* * The number of shares reported herein includes 200,000 shares issuable upon conversion of 8000 shares of the Issuer's 4% Convertible Perpetual Preferred Stock. SAC Capital Advisors, SAC Capital Management, Sigma Capital Management and Mr. Cohen own directly no Shares. Pursuant to investment agreements, each of SAC Capital Advisors and SAC Capital Management share all investment and voting power with respect to the securities held by SAC Capital Associates, SAC Arbitrage and SAC MultiQuant. Pursuant to an investment management agreement, Sigma Capital Management maintains investment and voting power with respect to the securities held by Sigma Capital Associates. Mr. Cohen controls each of SAC Capital Advisors, SAC Capital Management, Sigma Capital Management. By reason of the provisions of Rule 13d-3 of the Securities Exchange Act of 1934, as amended, each of (i) SAC Capital Advisors, SAC Capital Management and Mr. Cohen may be deemed to own beneficially 5,718,615 Shares (constituting approximately 6.5% of the Shares outstanding) and (ii) Sigma Capital Management and Mr. Cohen may be deemed to own beneficially 150,000 Shares (constituting approximately less than 1% of the Shares outstanding). Each of SAC Capital Advisors, SAC Capital Management, Sigma Capital Management and Mr. Cohen disclaim beneficial ownership of any of the securities covered by this statement. ITEM 5 OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS: If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following. |_| ITEM 6 OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON: Not Applicable Page 13 of 16 ITEM 7 IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY: Not Applicable ITEM 8 IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP: Not Applicable ITEM 9 NOTICE OF DISSOLUTION OF GROUP: Not Applicable ITEM 10 CERTIFICATION: By signing below the signatory certifies that, to the best of his knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Page 14 of 16 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: February 14, 2005 S.A.C. CAPITAL ADVISORS, LLC By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. CAPITAL MANAGEMENT, LLC By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. CAPITAL ASSOCIATES, LLC By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. ARBITRAGE FUND, LLC By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. MULTIQUANT FUND, LLC By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person Page 15 of 16 SIGMA CAPITAL MANAGEMENT, LLC By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person SIGMA CAPITAL ASSOCIATES, LLC By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person STEVEN A. COHEN By: /s/ Peter Nussbaum ----------------------------------------- Name: Peter Nussbaum Title: Authorized Person Page 16 of 16 December 27, 2004 BY ELECTRONIC FILING Securities and Exchange Commission Filing Desk 450 Fifth Street, N.W. Washington, D.C. 20549 Re: Schedule 13G filed with respect to NRG Energy, Inc. Dear Sirs: On behalf of S.A.C. Capital Advisors, LLC, S.A.C. Capital Management, LLC, S.A.C. Capital Associates, LLC, S.A.C. Arbitrage Fund, LLC, S.A.C. MultiQuant Fund, LLC and Steven A. Cohen, attached for filing pursuant to the Securities Exchange Act of 1934, and Rule 13d-1 promulgated thereunder, is a copy of Schedule 13G relating to the Common Stock, par value $.01 per share, of NRG Energy, Inc.. By copy of this letter, a conforming paper copy of the attached Schedule 13G is being sent by certified mail to NRG Energy, Inc. at its principal executive office. Please direct any questions to the undersigned at (212) 728-8797. Very truly yours, Joseph D. Rose Enclosure