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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1013871	Nrg Energy Inc.	NRG	Electric Services (4911)	411724239

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1428578	Mauricio Gutierrez	Nrg Energy, Inc. 211 Carnegie Center Princeton NJ 08540	Exec Vp & Chief Operating Ofc	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock, Par Value $.01 Per Share	Acquisiton	2011-05-20	1,000	$19.40	48,991	No	4	M	Direct
Common Stock, Par Value $.01 Per Share	Disposition	2011-05-20	851	$25.09	48,140	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock, Par Value $.01 Per Share	Non-Qualified Stock Options	Disposition	2011-05-20	1,000	$0.00	1,000	$19.40

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2006-08-01	2011-08-01	No	4	M	Direct

Footnotes

This transaction was executed in multiple trades at prices ranging from $25.09 to $25.20. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
Pursuant to the Grant Agreement by and between NRG Energy, Inc. and Mr. Gutierrez, the Non-Qualified Stock Options vested and became exercisable as follows: 33 1/3% on August 1, 2006, 33 1/3% on August 1, 2007 and 33 1/3% on August 1, 2008.