Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
MULLER EDWARD R
   2. Issuer Name and Ticker or Trading Symbol
NRG ENERGY, INC. [NRG] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
NRG ENERGY, INC., 211 CARNEGIE CENTER		 3. Date of Earliest Transaction (Month/Day/Year)
12/14/2012
(Street)

PRINCETON, NJ 08533		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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 12/14/2012   A   291,095 A (1) 291,095 D  
Common Stock, par value $.01 per share 12/14/2012   A   5,000 (2) A (3) 296,095 D  
Common Stock, par value $.01 per share 12/14/2012   A   138,128 (4) A (5) 434,223 D  
Common Stock, par value $.01 per share 12/14/2012   A   144,773 A (6) 144,773 I By Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities
(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 of Derivative Security: 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
Stock Option (right to buy) $ 71.55 12/14/2012   A   139,908   12/14/2012 01/13/2016 Common Stock, par value $.01 per share 139,908 (7) 139,908 D  
Stock Option (right to buy) $ 72.7 12/14/2012   A   137,619   12/14/2012 02/17/2016 Common Stock, par value $.01 per share 137,619 (8) 137,619 D  
Stock Option (right to buy) $ 107.41 12/14/2012   A   45,071   12/14/2012 03/07/2013 Common Stock, par value $.01 per share 45,071 (9) 45,071 D  
Stock Options (right to buy) $ 30.19 12/14/2012   A   76,420   12/14/2012 03/03/2019 Common Stock, par value $.01 per share 76,420 (10) 76,420 D  
Stock Option (right to buy) $ 38.33 12/14/2012   A   69,491   12/14/2012 03/11/2020 Common Stock, par value $.01 per share 69,491 (11) 69,491 D  
Stock Option (right to buy) $ 31.34 12/14/2012   A   90,548   12/14/2012 02/22/2021 Common Stock, par value $.01 per share 90,548 (12) 90,548 D  
Stock Option (right to buy) $ 20.7 12/14/2012   A   141,885   01/04/2013 02/26/2022 Common Stock, par value $.01 per share 141,885 (13) 141,885 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MULLER EDWARD R
NRG ENERGY, INC.
211 CARNEGIE CENTER
PRINCETON, NJ 08533		   X      

Signatures

 /s/ Brian Curci, under Power of Attorney   12/18/2012
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Received in exchange for 2,393,913 shares of GenOn Energy, Inc. common stock in connection with the merger of Plus Merger Corporation, a wholly owned subsidiary of NRG Energy, Inc., into GenOn Energy, Inc. (the "Merger").
(2) Represents Deferred Stock Units issued to Mr. Muller by NRG Energy, Inc. under NRG Energy, Inc.'s Amended and Restated Long-Term Incentive Plan.
(3) Each Deferred Stock Unit is equivalent in value to one share of NRG Energy, Inc.'s Common Stock, par value $.01 per share. Mr. Muller will receive from NRG Energy, Inc. one such share of Common Stock for each Deferred Stock Unit he owns upon termination of his service on NRG Energy, Inc.'s Board of Directors.
(4) Represents time-based restricted stock awards that will vest on January 4, 2013.
(5) Received in the Merger in exchange for 1,135,933 shares of time-based restricted stock of GenOn Energy, Inc.
(6) Received in exchange for 1,190,573 shares of GenOn Energy, Inc. common stock in connection with the Merger.
(7) Received in the Merger in exchange for a stock option to acquire 1,150,567 shares of GenOn Energy,Inc. common stock for $8.70 per share.
(8) Received in the Merger in exchange for a stock option to acquire 1,131,737 shares of GenOn Energy,Inc. common stock for $8.84 per share.
(9) Received in the Merger in exchange for a stock option to acquire 370,653 shares of GenOn Energy,Inc. common stock for $13.06 per share.
(10) Received in the Merger in exchange for a stock option to acquire 628,459 shares of GenOn Energy,Inc. common stock for $3.67 per share.
(11) Received in the Merger in exchange for a stock option to acquire 571,473 shares of GenOn Energy,Inc. common stock for $4.66 per share.
(12) Received in the Merger in exchange for a stock option to acquire 744,641 shares of GenOn Energy,Inc. common stock for $3.81 per share.
(13) Received in the Merger in exchange for a stock option to acquire 1,166,823 shares of GenOn Energy, Inc. common stock for $2.44 per share.

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