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

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * Garlick James P   2. Issuer Name and Ticker or Trading Symbol GenOn Energy, Inc. [GEN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, Plant Operations (Last) (First) (Middle) 1000 MAIN STREET 3. Date of Earliest Transaction (Month/Day/Year) 12/14/2012 (Street) HOUSTON, TX 77002 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 12/14/2012   F   11,508 (1) D $ 2.87 335,583 D   Common Stock 12/14/2012   D   335,583 D (2) 0 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

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 Options

$ 3.95

12/14/2012

D

45,908

(3)

07/31/2021

Common Stock

45,908

(3)

0

D

Stock Options

$ 2.44

12/14/2012

D

143,303

(4)

02/26/2022

Common Stock

143,303

(4)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Garlick James P 1000 MAIN STREET HOUSTON, TX 77002			SVP, Plant Operations

Signatures

/s/ Allison B. Cunningham, Attorney-in-Fact		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)	The reporting person disposed of these shares to satisfy tax withholding obligations related to the vesting of restricted stock units.
(2)	The reporting person disposed of these shares in connection with the merger (the "Merger") involving GenOn Energy, Inc. and NRG Energy, Inc.("NRG") in exchange for shares of NRG common stock, based on the exchange ratio of 0.1216 and having a market value of $23.00 per share on the effective date of the Merger, plus cash consideration for fractional shares.
(3)	Upon completion of the Merger involving GenOn Energy, Inc. and NRG Energy, Inc., this fully-vested option was converted into an option to purchase 5,582 shares of NRG Energy, Inc. common stock at $32.49 per share.
(4)	Upon completion of the Merger involving GenOn Energy, Inc. and NRG Energy, Inc., this option, which vests in three equal annual installments beginning February 27, 2013, was converted into an option to purchase 17,425 shares of NRG Energy, Inc. common stock at $20.07 per share.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.