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 * Cleary Anne M   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) Senior Vice President, Asset M (Last) (First) (Middle) 1000 MAIN STREET 3. Date of Earliest Transaction (Month/Day/Year) 12/03/2010 (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 12/03/2010   A   103,888 A (1) 103,888 D   Common Stock               5 I By spouse

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 Option - Right to Buy

$ 8.7

12/03/2010

A

23,051

12/03/2010

01/13/2016

Common Stock

23,051

(2)

23,051

D

Stock Option - Right to Buy

$ 8.84

12/03/2010

A

25,463

12/03/2010

02/17/2016

Common Stock

25,463

(3)

25,463

D

Stock Option - Right to Buy

$ 13.31

12/03/2010

A

14,430

12/03/2010

03/08/2012

Common Stock

14,430

(4)

14,430

D

Stock Option - Right to Buy

$ 13.06

12/03/2010

A

21,860

12/03/2010

03/07/2013

Common Stock

21,860

(5)

21,860

D

Stock Option - Right to Buy

$ 3.67

12/03/2010

A

67,036

12/03/2010

03/03/2019

Common Stock

67,036

(6)

67,036

D

Stock Option - Right to Buy

$ 4.66

12/03/2010

A

67,522

12/03/2010

03/11/2020

Common Stock

67,522

(7)

67,552

D

Warrants

$ 21.87

12/03/2010

A

99

12/03/2010

01/03/2011

Common Stock

280

(8)

99

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Cleary Anne M 1000 MAIN STREET HOUSTON, TX 77002			Senior Vice President, Asset M

Signatures

/s/ Allison B. Cunningham, Attorney-in-Fact		12/07/2010
**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 36,645 shares of common stock of Mirant Corporation ("Mirant") pursuant to the Agreement and Plan of Merger by and among Mirant, RRI Energy Holdings, Inc. and RRI Energy, Inc., now known as GenOn Energy, Inc. (the "Merger Agreement") based on the exchange ratio in the Merger Agreement.
(2)	Received pursuant to the Merger Agreement in exchange for stock options to acquire 8,131 shares of Mirant common stock for $24.64 per share.
(3)	Received pursuant to the Merger Agreement in exchange for stock options to acquire 8,982 shares of Mirant common stock for $25.05 per share.
(4)	Received pursuant to the Merger Agreement in exchange for stock options to acquire 5,090 shares of Mirant common stock for $37.71 per share.
(5)	Received pursuant to the Merger Agreement in exchange for stock options to acquire 7,711 shares of Mirant common stock for $37.02 per share.
(6)	Received pursuant to the Merger Agreement in exchange for stock options to acquire 23,646 shares of Mirant common stock for $10.40 per share.
(7)	Received pursuant to the Merger Agreement in exchange for stock options to acquire 23,828 shares of Mirant common stock for $13.19 per share.
(8)	Received pursuant to the Merger Agreement in exchange for warrants to acquire 99 shares of Mirant common stock for $21.87 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.