SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
BREWSTER JOHN P
(Last) (First) (Middle)
NRG ENERGY, INC.
211 CARNEGIE CENTER
(Street)
PRINCETON NJ 08540
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
NRG ENERGY, INC. [ NRG ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
EVP, Dev Eng, Proc and Constr
3. Date of Earliest Transaction (Month/Day/Year)
11/07/2007
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, par value .01 per share 11/07/2007 M(1) 54,000(2) A $19.9(2) 81,310(2) D
Common Stock, par value .01 per share 11/07/2007 S(1) 300 D $44.9 81,010 D
Common Stock, par value .01 per share 11/07/2007 S(1) 500 D $44.905 80,510 D
Common Stock, par value .01 per share 11/07/2007 S(1) 600 D $44.91 79,910 D
Common Stock, par value .01 per share 11/07/2007 S(1) 100 D $44.915 79,810 D
Common Stock, par value .01 per share 11/07/2007 S(1) 1,075 D $44.92 78,735 D
Common Stock, par value .01 per share 11/07/2007 S(1) 400 D $44.925 78,335 D
Common Stock, par value .01 per share 11/07/2007 S(1) 200 D $44.93 78,135 D
Common Stock, par value .01 per share 11/07/2007 S(1) 2,300 D $44.98 75,835 D
Common Stock, par value .01 per share 11/07/2007 S(1) 7,200 D $45 68,635 D
Common Stock, par value .01 per share 11/07/2007 S(1) 400 D $45.005 68,235 D
Common Stock, par value .01 per share 11/07/2007 S(1) 2,000 D $45.01 66,235 D
Common Stock, par value .01 per share 11/07/2007 S(1) 700 D $45.02 65,535 D
Common Stock, par value .01 per share 11/07/2007 S(1) 100 D $45.03 65,435 D
Common Stock, par value .01 per share 11/07/2007 S(1) 200 D $45.065 65,235 D
Common Stock, par value .01 per share 11/07/2007 S(1) 1,100 D $45.08 64,135 D
Common Stock, par value .01 per share 11/07/2007 S(1) 2,100 D $45.085 62,035 D
Common Stock, par value .01 per share 11/07/2007 S(1) 5,800 D $45.09 56,235 D
Common Stock, par value .01 per share 11/07/2007 S(1) 2,154 D $45.1 54,081 D
Common Stock, par value .01 per share 11/07/2007 S(1) 300 D $45.105 53,781 D
Common Stock, par value .01 per share 11/07/2007 S(1) 1,271 D $45.11 52,510 D
Common Stock, par value .01 per share 11/07/2007 S(1) 100 D $45.115 52,410 D
Common Stock, par value .01 per share 11/07/2007 S(1) 100 D $45.12 52,310 D
Common Stock, par value .01 per share 11/07/2007 S(1) 1,100 D $45.13 51,210 D
Common Stock, par value .01 per share 11/07/2007 S(1) 300 D $45.135 50,910 D
Common Stock, par value .01 per share 11/07/2007 S(1) 2,500 D $45.14 48,410 D
Common Stock, par value .01 per share 11/07/2007 S(1) 2,800 D $45.15 45,610 D
Common Stock, par value .01 per share 11/07/2007 S(1) 700 D $45.155 44,910 D
Common Stock, par value .01 per share 11/07/2007 S(1) 400 D $45.16 44,510 D
Common Stock, par value .01 per share 11/07/2007 S(1) 100 D $45.165 44,410 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Options $19.9(2) 11/07/2007 M(1) 54,000 (3) 03/02/2015 Common Stock, par value $.01 per share 54,000(2) $0.00 0(2) D
Explanation of Responses:
1. Transaction made pursuant to a 10b5-1 plan dated August 29, 2007.
2. On May 2, 2007, NRG Energy, Inc. announced a 2-for-1 stock split in the form of a stock dividend paid on May 31, 2007 to all holders of record of Common Stock on May 22, 2007. The Company's Common Stock began trading on a split-adjusted basis on June 1, 2007.
3. Pursuant to the Grant Agreement by and between NRG Energy, Inc. and Mr. Brewster, the Stock Options vested and became exercisable as follows: 33 1/3% on March 2, 2005; 33 1/3% on March 2, 2006; and 33 1/3% on March 2, 2007.
Remarks:
Form 1 of 2
/s/John P. Brewster 11/08/2007
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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