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 * BLACKSTONE MANAGEMENT ASSOCIATES IV LLC   2. Issuer Name and Ticker or Trading Symbol Nalco Holding CO [NLC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O THE BLACKSTONE GROUP L.P., 345 PARK AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 08/22/2005 (Street) NEW YORK, NY 10154 4. If Amendment, Date Original Filed(Month/Day/Year) 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 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 $0.01 per share 08/22/2005   S   1,618,605 D $ 18.41 (6) 19,767,140 I See Footnotes (1) (2) (3) (4) (5)

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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BLACKSTONE MANAGEMENT ASSOCIATES IV LLC C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK, NY 10154		X
BLACKSTONE CAPITAL PARTNERS IV LP C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK, NY 10154		X
BLACKSTONE FAMILY INVESTMENT PARTNERSHIP IV-A LP C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK, NY 10154		X
BLACKSTONE CAPITAL PARTNERS IV-A LP C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK, NY 10154		X
PETERSON PETER G C/O BLACKSTONE MANAGEMENT PARTNERS III L.L.C. 345 PARK AVENUE, 31ST FLOOR NEW YORK, NY 10154		X
SCHWARZMAN STEPHEN A C/O BLACKSTONE MANAGEMENT PARTNERS III L.L.C. 345 PARK AVENUE, 31ST FLOOR NEW YORK, NY 10154		X

Signatures

/s/ Chinh Chu, Member of Blackstone Management Associates IV L.L.C.		08/24/2005
**Signature of Reporting Person		Date
(See signatures of other Reporting Persons attached as Exhibit 99.1)		08/24/2005
**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)	On August 22, 2005, an additional 4,350,000 shares of Nalco Holding Company (the "Issuer") common stock (the "Common Stock") were sold in a registered public offering pursuant to the underwriters' exercise of their over-allotment option. Nalco LLC (the selling stockholder) received all proceeds from this over-allotment offering.
(2)	The shares of the Issuer's common stock reported as beneficially owned in the above table reflect an indirect beneficial ownership in the Issuer based on the membership interests in Nalco LLC held by Blackstone Capital Partners IV L.P., Blackstone Family Investment Partnership IV-A L.P. and Blackstone Capital Partners IV-A L.P. (collectively, the "Blackstone Funds"). Blackstone Management Associates IV LLC ("BMA") is the general partner having voting and investment power over the shares of common stock held or controlled by each of the Blackstone Funds. The membership interests in Nalco LLC are held by the Blackstone Funds and affiliates of the Goldman Sachs Group, Inc. and Apollo Management, LP (together with the Blackstone Funds, the "LLC Members"), as well as certain members of management of the Issuer. (Continued in footnote (3))
(3)	(Continued from footnote (2)) Because voting and dispositive decisions of Nalco LLC with respect to the common stock of the Issuer require the approval of at least two of the LLC Members, the Blackstone Funds disclaim beneficial ownership of the Issuer's securities held by Nalco LLC. Nonetheless, BMA, the Blackstone Funds and the other reporting persons identified herein are voluntarily reporting an indirect beneficial ownership in the Issuer's common stock, as reflected herein.
(4)	The Blackstone Funds, BMA, Messrs. Peter G. Peterson and Stephen A. Schwarzman (the founding members of BMA) disclaim beneficial ownership of all shares of the Issuer's common stock in excess of their pecuniary interest, if any, and this report shall not be deemed an admission that any such person or entity is the beneficial owner of, has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
(5)	Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.
(6)	Represents price to public in an underwritten public offering.

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