-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, DW17a6MIhmwRyAXrDLFyoKNB4MEdzGJiTo0vDOAJpsMdI0ztBnX7/l5PqX56u5Mx PrPqQpe7rhZ49WTJT9GZ5g== 0000950136-06-002186.txt : 20060323 0000950136-06-002186.hdr.sgml : 20060323 20060323163344 ACCESSION NUMBER: 0000950136-06-002186 CONFORMED SUBMISSION TYPE: SC 13D/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20060323 DATE AS OF CHANGE: 20060323 GROUP MEMBERS: BLACKSTONE CAPITAL PARTNERS IV LP GROUP MEMBERS: BLACKSTONE CAPITAL PARTNERS IV-A LP GROUP MEMBERS: BLACKSTONE FAMILY INVESTMENT PARTNERSHIP IV-A LP GROUP MEMBERS: PETER G. PETERSON GROUP MEMBERS: STEPHEN A. SCHWARZMAN FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: BLACKSTONE MANAGEMENT ASSOCIATES IV LLC CENTRAL INDEX KEY: 0001277410 IRS NUMBER: 000000000 FILING VALUES: FORM TYPE: SC 13D/A MAIL ADDRESS: STREET 1: C/O THE BLACKSTONE GROUP STREET 2: 345 PARK AVE CITY: NEW YORK STATE: NY ZIP: 10154 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Nalco Holding CO CENTRAL INDEX KEY: 0001298341 STANDARD INDUSTRIAL CLASSIFICATION: MISCELLANEOUS CHEMICAL PRODUCTS [2890] IRS NUMBER: 161701300 FISCAL YEAR END: 1204 FILING VALUES: FORM TYPE: SC 13D/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-80171 FILM NUMBER: 06706431 BUSINESS ADDRESS: STREET 1: 1601 WEST DIEHL ROAD CITY: NAPERVILLE STATE: IL ZIP: 60563 BUSINESS PHONE: (630) 305-1000 MAIL ADDRESS: STREET 1: 1601 WEST DIEHL ROAD CITY: NAPERVILLE STATE: IL ZIP: 60563 FORMER COMPANY: FORMER CONFORMED NAME: Nalco CORP DATE OF NAME CHANGE: 20040723 SC 13D/A 1 file001.htm SCHEDULE 13D/A 


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13D
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934


                                (AMENDMENT NO. 3)

                              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:

                             Richard A. Fenyes, Esq.
                         Simpson Thacher & Bartlett LLP
                               425 Lexington Ave.
                            New York, New York 10017

                                 March 21, 2006
- --------------------------------------------------------------------------------
             (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. [ ]








CUSIP NO. 62985Q 10 1
- ------- --------------------------------------------------------------------- ----------------------------------------

1       NAME OF REPORTING PERSON
        I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITY ONLY)

        Blackstone Management Associates IV LLC
- ------- ---------------------------------------------------------- ---------------------------------------------------

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

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

 NUMBER OF SHARES   8      SHARED VOTING POWER
   BENEFICIALLY
  OWNED BY EACH            501,261 shares (See Items 4 and 5)
 REPORTING PERSON
       WITH
                    ------ -------------------------------------------------------------------------------------------
                    9
                           SOLE DISPOSITIVE POWER

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

                    10     SHARED DISPOSITIVE POWER

                           501,261 shares (See Items 4 and 5)

- ------------------- ------ -------------------------------------------------------------------------------------------

11                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    14,185,745 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)

                    9.9%

- ---------- -------- --------------------------------------------------------------------------------------------------
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 LP
- ------- --------------------------------------------------------------------- ----------------------------------------

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

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

 NUMBER OF SHARES   8      SHARED VOTING POWER
   BENEFICIALLY
  OWNED BY EACH
 REPORTING PERSON          None
       WITH
                    ------ -------------------------------------------------------------------------------------------
                    9
                           SOLE DISPOSITIVE POWER

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

                    10     SHARED DISPOSITIVE POWER

                           None
- ------------------- ------ -------------------------------------------------------------------------------------------

11                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


                    13,684,484 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)

                    9.6%

- ---------- -------- --------------------------------------------------------------------------------------------------
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 LP
- ------- ---------------------------------------------------------- ---------------------------------------------------

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
 REPORTING PERSON          217,546 shares (See Items 4 and 5)
       WITH
                    ------ -------------------------------------------------------------------------------------------

                    9      SOLE DISPOSITIVE POWER

                           None
                    ------ -------------------------------------------------------------------------------------------

                    10     SHARED DISPOSITIVE POWER

                           217,546 shares (See Items 4 and 5)
- ---------- -------- --------------------------------------------------------------------------------------------------

11                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    217,546 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)

                    0.002%
- ---------- -------- --------------------------------------------------------------------------------------------------

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 LP
- ------- --------------------------------------------------------------------- ----------------------------------------

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
 REPORTING PERSON          283,715 shares (See Items 4 and 5)
       WITH
                    ------ -------------------------------------------------------------------------------------------
                    9
                           SOLE DISPOSITIVE POWER

                           None
                    ------ -------------------------------------------------------------------------------------------

                    10     SHARED DISPOSITIVE POWER

                           283,715 shares (See Items 4 and 5)
- ------------------- ------ -------------------------------------------------------------------------------------------

11                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    283,715 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)

                    0.002%

- ---------- -------- --------------------------------------------------------------------------------------------------
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

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

 NUMBER OF SHARES   8      SHARED VOTING POWER
   BENEFICIALLY
  OWNED BY EACH            501,261 shares (See Items 4 and 5)
 REPORTING PERSON
       WITH
                    ------ -------------------------------------------------------------------------------------------
                    9
                           SOLE DISPOSITIVE POWER

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

                    10     SHARED DISPOSITIVE POWER

                           501,261 shares (See Items 4 and 5)

- ---------- -------- --------------------------------------------------------------------------------------------------

11                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    14,185,745 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)

                    9.9%

- ---------- -------- --------------------------------------------------------------------------------------------------
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

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

 NUMBER OF SHARES   8      SHARED VOTING POWER
   BENEFICIALLY
  OWNED BY EACH            501,261 shares (See Items 4 and 5)
 REPORTING PERSON
       WITH
                    ------ -------------------------------------------------------------------------------------------
                    9
                           SOLE DISPOSITIVE POWER

                           13,684,484
                    ------ -------------------------------------------------------------------------------------------

                    10     SHARED DISPOSITIVE POWER

                           501,261 shares (See Items 4 and 5)

- ------------------- ------ -------------------------------------------------------------------------------------------

11                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    14,185,745 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)

                    9.9%

- ---------- -------- --------------------------------------------------------------------------------------------------
14
                    TYPE OF REPORTING PERSON
                       IN
- ---------- -------- --------------------------------------------------------------------------------------------------






         This Amendment No. 3 supplements and amends Items 5, 6 and 7 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 and Amendment
No. 2 to the Statement on Schedule 13D filed on August 24, 2005 (as so amended,
the "Statement on Schedule 13D") by (i) Blackstone Management Associates IV LLC,
a Delaware limited liability company ("BMA"), (ii) Blackstone Capital Partners
IV LP, a Delaware limited partnership ("BCP IV"), (iii) Blackstone Capital
Partners IV-A LP, a Delaware limited partnership ("BCP IV-A"), (iv) Blackstone
Family Investment Partnership IV-A LP, 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"), each 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.

         Responses to each item of this Amendment No. 3 to Statement on Schedule
13D are incorporated by reference into the response to each other item, as
applicable.

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 December 30, 2005, Nalco LLC made a distribution of an aggregate of
38,029,261 shares of the Issuer's common stock to the members of Nalco LLC that
qualified as a "venture capital operating company" (as defined in 29 C.F.R. sec.
2510.3-101(d)) in proportion to their membership interests pursuant to the terms
of the previously reported Stockholders Agreement, which included the
distribution of 19,068,658 shares to BCP IV, which was formerly a member of
Nalco LLC. Following such distribution, BCP IV, and BCP IV-A and BFIP IV (which
continued as members of Nalco LLC), beneficially held an aggregate of 19,767,140
shares of the Issuer's common stock, consisting of (i) 19,068,658 shares of
which BCP IV was the record holder and (ii) 698,482 shares in which BCP IV-A and
BFIP IV held an indirect beneficial economic interest based on the membership
interests in Nalco LLC held by such funds.

         On March 21, 2006, Nalco LLC, Apollo Investment Fund V, L.P., BCP IV
and GS Capital Partners 2000, L.P. (collectively, the "Selling Stockholders")
sold an aggregate of 15,000,000 shares of Common Stock in connection with an
underwritten offering registered on the registration statement on Form S-3 (File
No. 333-130715) filed by the Issuer with the Securities and Exchange Commission
on December 27, 2005, as supplemented by the prospectus supplement dated March
15, 2006 (the "Prospectus"). Following such sale, (i) BCP IV is the record
holder of 13,684,684 shares of Common Stock and (ii) BFIP IV and BCP IV-A may be
deemed to beneficially hold an economic interest in 501,261 shares of Common
Stock held of record by Nalco LLC, which collectively represents in the
aggregate approximately 9.9% of the outstanding Common Stock of the Issuer.

         The 14,185,745 shares of Common Stock shown as beneficially owned by
the Blackstone Funds in this Amendment No. 3 to Schedule 13D reflect (i) the
direct ownership of 13,684,484 shares of Common Stock by BCP IV and (ii) the
percentage interest of BCP IV-A and BFIP IV in the 10,894,108 shares of Common
Stock held of record by Nalco LLC, based on the combined percentage economic
interest of BCP IV-A and BFIP IV 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. 3 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. 3 to Schedule 13D, which is incorporated herein by reference. The percentage
of the class beneficially owned by each Reporting Person is based on 142,809,895
issued and outstanding shares of Common Stock, as reported by the Issuer in the
Prospectus.

         (b) See the information contained on the cover pages to this Amendment
No. 3 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.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
SECURITIES OF THE ISSUER

         Item 6 is hereby amended and supplemented as follows:

         Underwriting Agreement

         On March 15, 2006, the Selling Stockholders entered into an
Underwriting Agreement with the Issuer and Citigroup Global Markets Inc. (the
"Underwriter") for the sale by the Selling Stockholders of an aggregate of
15,000,000 shares of Common Stock and, at the election of the Underwriter, up to
2,250,000 additional shares of Common Stock to cover over-allotments. Closing of
the sale occurred on March 21, 2006. Pursuant to the terms of the Underwriting
Agreement, each of the Issuer and the Selling Stockholders agreed, subject to
certain exceptions, not to dispose of or hedge any of their Common Stock or
securities convertible into or exchangeable for shares of Common Stock during
the period that is 60 days from March 15, 2006, subject to an extension of up to
18 additional days under certain circumstances, except with the prior written
consent of the Underwriter, with certain exceptions.

         References to, and descriptions of, the Underwriting Agreement as set
forth in this Item 6 are qualified in their entirety by reference to the
Underwriting Agreement filed herewith.


ITEM 7. MATERIAL TO BE FILED AS EXHIBITS

Exhibit        Title
- -------        -----
1.             Underwriting Agreement, dated as of March 15, 2006, among Nalco
               Holding Company, the Selling Stockholders and the Underwriter
               (incorporated herein by reference to Exhibit 99.1 to the Nalco
               Holding Company Current Report on Form 8-K filed with the SEC on
               March 20, 2006 (File No. 001-32342)).








                                    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: March 23, 2006


                BLACKSTONE MANAGEMENT ASSOCIATES IV LLC

                By: /s/ Chinh Chu
                    ------------------------------------
                    Name: Chinh Chu
                    Title: Member

                BLACKSTONE CAPITAL PARTNERS IV LP
                BLACKSTONE CAPITAL PARTNERS IV-A LP
                BLACKSTONE FAMILY INVESTMENT PARTNERSHIP IV-A LP

                By: Blackstone Management Associates IV LLC, 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
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