Edgar Filing: BLACKSTONE CAPITAL PARTNERS IV-A LP

Ownership Submission

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
INITIAL STATEMENT OF 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 ^*

Â BLACKSTONE MANAGEMENT ASSOCIATES IV LLC

2. Date of Event Requiring Statement (Month/Day/Year)
08/09/2006

3. Issuer Name and Ticker or Trading Symbol
NRG ENERGY, INC. [NRG]

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP,Â 345 PARK AVENUE

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	__X__ 10% Owner
_____ Officer (give title below)	__X__ Other (specify below)
See Remarks

5. If Amendment, Date Original Filed(Month/Day/Year)

(Street)

NEW YORK,Â NYÂ 10154

6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person

(City)

(State)

(Zip)

Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common stock, par value $0.01 per share	6,619,165	I	See footnotes ⁽¹⁾ ⁽²⁾ ⁽³⁾ ⁽⁴⁾
Common stock, par value $0.01 per share	1,259,655	I	See footnotes ⁽¹⁾ ⁽²⁾ ⁽³⁾ ⁽⁴⁾
Common stock, par value $0.01 per share	416,320	I	See footnotes ⁽¹⁾ ⁽²⁾ ⁽³⁾ ⁽⁴⁾
Common stock, par value $0.01 per share	115,370	I	See footnotes ⁽¹⁾ ⁽²⁾ ⁽³⁾ ⁽⁴⁾
Common stock, par value $0.01 per share	15,251	I	See footnotes ⁽¹⁾ ⁽²⁾ ⁽³⁾ ⁽⁴⁾

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
BLACKSTONE MANAGEMENT ASSOCIATES IV LLC C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks
Blackstone TG Capital Partners IV L.P. C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks
Blackstone TG Capital Partners IV-B L.P. C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks
BLACKSTONE FAMILY INVESTMENT PARTNERSHIP IV-A LP C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks
BLACKSTONE CAPITAL PARTNERS IV-A LP C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks
Blackstone Participation Partnership IV L.P. C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks
PETERSON PETER G C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks
SCHWARZMAN STEPHEN A C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK,Â NYÂ 10154	Â	Â X	Â	See Remarks

Signatures

/s/ David Foley (on behalf of Blackstone Management Associates IV L.L.C.)		08/11/2006
^**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	Blackstone TG Capital Partners IV L.P., Blackstone TG Capital Partners IV-B L.P., Blackstone Family Investment Partnership IV-A L.P., Blackstone Capital Partners IV-A L.P. and Blackstone Participation Partnership IV L.P. (collectively, the "Blackstone Funds") directly own respectively 6,619,165, 1,259,655, 416,320, 115,370 and 15,251 shares of NRG Energy, Inc.'s common stock (the "Common Stock") reported as beneficially owned in the above table. Blackstone Management Associates IV L.L.C. is the sole general partner of each of the Blackstone Funds and, as such, may be deemed to share beneficial ownership of the shares of Common Stock held by the Blackstone Funds.
(2)	Messrs. Peter G. Peterson and Stephen A. Schwarzman are the founding members of Blackstone Management Associates IV L.L.C. and, as such, may be deemed to share beneficial ownership of the shares of Common Stock held by the Blackstone Funds.
(3)	Information with respect to each of the Reporting Persons is given solely by such Reporting Persons, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.
(4)	Pursuant to Rule 16a-1(a)(4) of the Securities Exchange Act of 1934, as amended, each of the Reporting Persons, other than the Blackstone Funds, herein states that this filing shall not be deemed an admission that he or it is the beneficial owner of any of the shares of Common Stock covered by this Statement. Each of Blackstone Management Associates IV L.L.C., Messrs. Peter G. Peterson and Stephen A. Schwarzman disclaims beneficial ownership of the Common Stock, except to the extent of its or his pecuniary interest in such shares of Common Stock.
Â Remarks: AsÂ describedÂ inÂ AmendmentÂ No.Â 1Â toÂ ScheduleÂ 13DÂ filedÂ onÂ AugustÂ 11,Â 2006Â withÂ respectÂ toÂ theÂ CommonÂ StockÂ byÂ theÂ ReportingÂ PersonsÂ andÂ theÂ otherÂ filersÂ listedÂ onÂ theÂ signatureÂ pagesÂ theretoÂ (theÂ "OtherÂ 13DÂ Filers"),Â theÂ BlackstoneÂ FundsÂ andÂ certainÂ OtherÂ 13DÂ FilersÂ mayÂ beÂ deemedÂ toÂ beÂ aÂ "group"Â underÂ SectionÂ 13(d)Â ofÂ theÂ SecuritiesÂ ExchangeÂ ActÂ andÂ eachÂ ReportingÂ PersonÂ mayÂ beÂ deemedÂ toÂ haveÂ beneficialÂ ownershipÂ ofÂ 10%Â orÂ moreÂ ofÂ theÂ CommonÂ Stock.Â Â EachÂ ReportingÂ PersonÂ expresslyÂ disclaimsÂ membershipÂ inÂ anyÂ suchÂ groupÂ underÂ SectionÂ 13(d)Â ofÂ theÂ SecuritiesÂ ExchangeÂ ActÂ orÂ forÂ anyÂ otherÂ purpose.

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