SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 2) NALCO HOLDING COMPANY -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, par value $0.01 per share -------------------------------------------------------------------------------- (Title of Class of Securities) 62985Q 10 1 -------------------------------------------------------------------------------- (CUSIP Number) Chinh Chu c/o The Blackstone Group 345 Park Avenue, New York, NY 10154 (212) 583-5000 -------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) Copy to: Edward P. Tolley III, Esq. Simpson Thacher & Bartlett LLP 425 Lexington Ave. New York, New York 10017 August 22, 2005 -------------------------------------------------------------------------------- (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Amendment No. 1, and is filing this schedule because of Rule 13d-1(e), Rule 13d-1(f) or Rule 13d-1(g), check the following box. [ ] NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See (ss)240.13d-7 for other parties to whom copies are to be sent. * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). CUSIP NO. 62985Q 10 1 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITY ONLY) Blackstone Management Associates IV L.L.C. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) _ (b) X -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7 SOLE VOTING POWER None ------------------------------------------------------------ NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY EACH 19,767,140 shares (See Items 4 and 5) REPORTING PERSON ------------------------------------------------------------ WITH 9 SOLE DISPOSITIVE POWER None ------------------------------------------------------------ 10 SHARED DISPOSITIVE POWER 19,767,140 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 19,767,140 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [X] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON OO -------------------------------------------------------------------------------- CUSIP NO. 62985Q 10 1 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITY ONLY) Blackstone Capital Partners IV L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) _ (b) X -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7 SOLE VOTING POWER None ------------------------------------------------------------ NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY EACH 19,068,659 shares (See Items 4 and 5) REPORTING PERSON ------------------------------------------------------------ WITH 9 SOLE DISPOSITIVE POWER None ------------------------------------------------------------ 10 SHARED DISPOSITIVE POWER 19,068,659 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 19,068,659 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [X] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 13.5% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON PN -------------------------------------------------------------------------------- CUSIP NO. 62985Q 10 1 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Blackstone Capital Partners IV-A L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) _ (b) X -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7 SOLE VOTING POWER None ------------------------------------------------------------ NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY EACH 303,139 shares (See Items 4 and 5) REPORTING PERSON ------------------------------------------------------------ WITH 9 SOLE DISPOSITIVE POWER None ------------------------------------------------------------ 10 SHARED DISPOSITIVE POWER 303,139 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 303,139 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [X] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.2% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON PN -------------------------------------------------------------------------------- CUSIP NO. 62985Q 10 1 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITY ONLY) Blackstone Family Investment Partnership IV-A L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) _ (b) X -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7 SOLE VOTING POWER None ------------------------------------------------------------ NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY EACH 395,343 shares (See Items 4 and 5) REPORTING PERSON ------------------------------------------------------------ WITH 9 SOLE DISPOSITIVE POWER None ------------------------------------------------------------ 10 SHARED DISPOSITIVE POWER 395,343 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 395,343 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [X] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.3% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON PN -------------------------------------------------------------------------------- CUSIP NO. 62985Q 10 1 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Peter G. Peterson -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) _ (b) X -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION U.S.A. -------------------------------------------------------------------------------- 7 SOLE VOTING POWER None ------------------------------------------------------------ NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY EACH 19,767,140 shares (See Items 4 and 5) REPORTING PERSON ------------------------------------------------------------ WITH 9 SOLE DISPOSITIVE POWER None ------------------------------------------------------------ 10 SHARED DISPOSITIVE POWER 19,767,140 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 19,767,140 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [X] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN -------------------------------------------------------------------------------- CUSIP NO. 62985Q 10 1 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Stephen A. Schwarzman -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) _ (b) X -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION U.S.A. -------------------------------------------------------------------------------- 7 SOLE VOTING POWER None ------------------------------------------------------------ NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY EACH 19,767,140 shares (See Items 4 and 5) REPORTING PERSON ------------------------------------------------------------ WITH 9 SOLE DISPOSITIVE POWER None ------------------------------------------------------------ 10 SHARED DISPOSITIVE POWER 19,767,140 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 19,767,140 shares (See Items 4 and 5) -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [X] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN -------------------------------------------------------------------------------- This Amendment No. 2 supplements and amends Item 5, of the Statement on Schedule 13D filed on November 24, 2004 as amended by Amendment No. 1 to the Statement on Schedule 13D filed on August 19, 2005 (as so amended, the "Statement on Schedule 13D") by (i) Blackstone Management Associates IV L.L.C., a Delaware limited liability company ("BMA"), (ii) Blackstone Capital Partners IV L.P., a Delaware limited partnership ("BCP IV"), (iii) Blackstone Capital Partners IV-A L.P., a Delaware limited partnership ("BCP IV-A"), (iv) Blackstone Family Investment Partnership IV-A L.P., a Delaware limited partnership ("BFIP IV" and, together with BCP IV and BCP IV-A, the "Blackstone Funds"), (v) Mr. Peter G. Peterson and (vi) Mr. Stephen A. Schwarzman (the foregoing, collectively, the "Reporting Persons"), relating to the shares of common stock, par value $0.01 (the "Common Stock"), of Nalco Holding Company (the "Issuer"). Unless otherwise indicated, each capitalized term used but not otherwise defined herein shall have the meaning assigned to such term in the Statement on Schedule 13D. ITEM 5. INTEREST IN SECURITIES OF THE ISSUER Item 5 is hereby amended and supplemented by deleting it in its entirety and replacing it with the following: On August 17, 2005, Nalco LLC sold an aggregate of 29,000,000 shares of Common Stock pursuant to an underwritten offering registered on the registration statement on Form S-1 (File No. 333-126642) filed by the Issuer with the Securities and Exchange Commission on July 15, 2005 and thereafter amended on August 2, 4, 9 and 12, 2005 (as amended, the "Registration Statement"). On August 18, 2005, the underwriters exercised their over-allotment option to purchase an additional 4,350,000 shares of Common Stock from Nalco LLC. The closing of such sale occurred on August 22, 2005. The 19,767,140 shares of Common Stock shown as beneficially owned by the Blackstone Funds in this Amendment No. 2 to Schedule 13D reflect the Blackstone Funds' percentage interest in the 57,202,258 shares of Common Stock held of record by Nalco LLC, based on the Blackstone Funds' combined percentage economic interest in Nalco LLC, and excludes the balance of such shares which represent the other Sponsors' and management members' percentage interest in Nalco LLC. The shares of Common Stock shown as beneficially owned by BMA and the Founding Members include the shares of Common Stock shown as beneficially owned by the Blackstone Funds. Because voting and dispositive decisions of Nalco LLC with respect to the Common Stock require the approval of at least two of the Sponsors, the Blackstone Funds, BMA and the Founding Members each disclaim beneficial ownership of the Common Stock reported as beneficially owned by Nalco LLC or any of the other Sponsors, and the filing of this Amendment No. 2 to Schedule 13D shall not be construed as an admission that any such person is the beneficial owner of any such securities. (a) See the information contained on the cover pages to this Amendment No. 2 to Schedule 13D, which is incorporated herein by reference. The percentage of the class beneficially owned by each Reporting Person is based on 141,663,369 issued and outstanding shares of Common Stock, as reported by the Issuer in the Registration Statement. (b) See the information contained on the cover pages to this Amendment No. 2 to Schedule 13D, which is incorporated herein by reference. (c) Except for the information set forth herein, or incorporated by reference herein, none of the Reporting Persons has effected any transaction relating to the Common Stock during the past 60 days. (d) In accordance with the terms of the Nalco LLC Limited Liability Company Operating Agreement and, if approved by the board of directors of Nalco LLC, the members of Nalco LLC have the right to receive dividends from and the proceeds from any sale of Common Stock in accordance with their membership interests in Nalco LLC. (e) Not applicable. SIGNATURE After reasonable inquiry and to the best knowledge and belief of each of the undersigned, each of the undersigned certifies that the information set forth in this statement with respect to such person is true, complete and correct. Dated: August 24, 2005 BLACKSTONE MANAGEMENT ASSOCIATES IV L.L.C. By: /s/ Chinh Chu ---------------------------------------- Name: Chinh Chu Title: Member BLACKSTONE CAPITAL PARTNERS IV L.P. By: Blackstone Management Associates IV L.L.C., its General Partner By: /s/ Chinh Chu ------------------------------------ Name: Chinh Chu Title: Member BLACKSTONE CAPITAL PARTNERS IV-A L.P. By: Blackstone Management Associates IV L.L.C., its General Partner By: /s/ Chinh Chu ------------------------------------ Name: Chinh Chu Title: Member BLACKSTONE FAMILY INVESTMENT PARTNERSHIP IV-A L.P. By: Blackstone Management Associates IV L.L.C., its General Partner By: /s/ Chinh Chu ------------------------------------ Name: Chinh Chu Title: Member /s/ Peter G. Peterson ----------------------------------- PETER G. PETERSON /s/ Stephen A. Schwarzman ----------------------------------- STEPHEN A. SCHWARZMAN