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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                 (RULE 13d-102)

                 INFORMATION TO BE INCLUDED IN STATEMENTS FILED
          PURSUANT TO RULE 13D-1(b), (c) AND (d) AND AMENDMENTS THERETO
                         FILED PURSUANT TO RULE 13d-2(b)

                                (AMENDMENT NO. )*


                                   CMGI, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                          Common Stock, $0.01 par value
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    125750109
             -------------------------------------------------------
                                 (CUSIP Number)


                                December 8, 2004
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

|_|   Rule 13d-1(b)

|X|   Rule 13d-1(c)

|_|   Rule 13d-1(d)

      * 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 the disclosures provided in a prior cover page.

      The information  required in 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).


                                  Page 1 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 - -------------------------------------------------------------------------------- 1 Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). J.P. Morgan Partners (BHCA), L.P. (formerly known as Chase Equity Associates, L.P.) 13-3371826 - -------------------------------------------------------------------------------- 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3. SEC Use Only - -------------------------------------------------------------------------------- 4. Citizenship or Place of Organization Delaware - -------------------------------------------------------------------------------- Number of 5. Sole Voting Power 635,965 Shares ----------------------------------------------------- Beneficially 6. Shared Voting Power Owned by ----------------------------------------------------- Each Reporting 7. Sole Dispositive Power 635,965 Person ----------------------------------------------------- With: 8. Shared Dispositive Power - -------------------------------------------------------------------------------- 9. Aggregate Amount Beneficially Owned by Each Reporting Person 635,965 - -------------------------------------------------------------------------------- 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) XX See Footnote 1 below - -------------------------------------------------------------------------------- 11. Percent of Class Represented by Amount in Row (9) .13% - -------------------------------------------------------------------------------- 12. Type of Reporting Person (See Instructions) PN - -------------------------------------------------------------------------------- ................................................................................. ................................................................................. ................................................................................. ................................................................................. ______________________ 1 The Reporting Person is a party to that certain Stock Transfer Agreement dated as of March 23, 2004 and that certain Stockholder Selling Agreement, dated as of August 2, 2004 (collectively, the "Stockholder Selling Agreements"). As a result, the Reporting Person, together with the other parties to the Stockholder Selling Agreements, may be deemed to constitute a "group" for purposes of Section 13(d)(3) of the Securities Exchange Act of 1932, as amended (the "Act") with respect to 32,637,172 shares of the Issuer's Common Stock (defined herein) representing 6.8% of the Issuer's Common Stock outstanding as of the date hereof. The Reporting Person disclaims beneficial ownership of any securities held by any other party to the Selling Stockholder Agreements and the filing of this Statement on Schedule 13G shall not be deemed an admission that the Reporting Person or any other person or persons party to the Selling Shareholders Agreements constitute a "group" for purposes of Section 13(d)(3) of the Act or Rule 13d-5 thereunder. Page 2 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 13. (a) NAME OF ISSUER: CMGI, Inc. (b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 1100 Winter Street Waltham, Massachusetts 02451 14. (a) NAME OF PERSON FILING: J.P. Morgan Partners (BHCA), L.P. Supplemental information relating to the ownership and control of the person filing this statement is included in Exhibit 2(a) attached hereto. (b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: 1221 Avenue of the Americas New York, New York 10020 (c) CITIZENSHIP: Delaware (d) TITLE OF CLASS OF SECURITIES (OF ISSUER): Common Stock, par value $0.01 per share (e) CUSIP NUMBER: 125750109 15. IF THIS STATEMENT IS FILED PURSUANT TO SS. SS. 240. 13D-1(B) OR 240. 13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A: Not applicable. 16. OWNERSHIP (a) AMOUNT BENEFICIALLY OWNED: 635,965 shares of Common Stock Page 3 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 (b) PERCENT OF CLASS: .13% (c) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS: (i) Sole power to vote or to direct the vote: 635,965 (ii) Shared power to vote or to direct the vote: Not applicable. (iii) Sole power to dispose or to direct the disposition of: 635,965 (iv) Shared power to dispose or to direct the disposition of: Not applicable. 17. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS If this statement is being filed to report the fact that as of the date hereof the Reporting Person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following. 18. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON Not applicable. 19. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY Not applicable. 20. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP The Reporting Person together with Timothy M. Adams, Bain Capital Fund IV, L.P., Bain Capital Partners V, L.P., BankAmerica Investment Corporation, BCIP Associates, BCIP Trust Associates, L.P., BCIP Trust Associates II, BCIP Trust Associates II-B, BCM Capital Partners, L.P., Daniel F. Beck, Canpartners Investments IV, LLC, Rory J. Cowan, Robert T. Dechant, Enterprise Associates, LLC, Vahram V. Erdekian, Sheila M. Flaherty, Fleet National Bank, Trustee of the Alexander S. Moore Trust dated 6/5/96, Fleet National Bank, Trustee of the Abegail L. Moore Trust dated 6/5/96, Harding Holdings, Inc., Information Partners, Deborah A. Keeman, Jeremiah Kelly, Linwood A. Lacy, Terence M. Leahy, Stephen D.R. Moore, R. Scott Murray, OCM Mezzanine Fund, L.P., Nicholas G. Nomicos, Morton H. Rosenthal, Sankaty Credit Opportunities, L.P., Sankaty High Yield Partners II, L.P., Sankaty High Yield Partners III, L.P., W. Ken Southerland, Randy S. Stone, David A. Tanner and The Murray 2003 Qualified Annuity Trust are parties to the Selling Stockholder Agreements and as result thereof may be deemed to constitute a "group" for purposes of Section 13(d)(3) of the Securities Exchange Act of 1932, as amended (the "Act") with respect to 32,637,172 shares of the Issuer's Common Stock representing 6.8% of the Issuer's Common Stock outstanding as of the date hereof. The Reporting Person disclaims beneficial ownership of any securities held by any other party to the Selling Stockholder Agreements and the filing of this Statement on Schedule 13G shall not be deemed an admission that the Reporting Person or any other person or persons party to the Selling Shareholders Agreements constitute a "group" for purposes of Section 13(d)(3) of the Act or Rule 13d-5 thereunder. 21. NOTICE OF DISSOLUTION OF GROUP Not applicable. 22. CERTIFICATION By signing below the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the Issuer and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Page 4 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: December 2004 J.P. MORGAN PARTNERS (BHCA), L.P. By: JPMP Master Fund Manager, L.P., its General Partner By: JPMP Capital Corp., its General Partner By: /s/ Jeffrey C. Walker ---------------------------------- Name: Jeffrey C. Walker Title: President Page 5 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 EXHIBIT 2(a) This statement is being filed by J.P. Morgan Partners (BHCA), L.P. (formerly known as Chase Equity Associates, L.P.), a Delaware limited partnership (hereinafter referred to as "JPMP (BHCA)"), whose principal business office is located at 1221 Avenue of the Americas, New York, New York 10020. JPMP (BHCA) is engaged in the venture capital and leveraged buyout business. The general partner of JPMP (BHCA) is JPMP Master Fund Manager, L.P., a Delaware limited partnership (hereinafter referred to as "JPMP Master Fund"), whose principal business office is located at the same address as JPMP (BHCA), and is also directly or indirectly (through affiliates) engaged in the venture capital and leveraged buyout business. The general partner of JPMP Master Fund is JPMP Capital Corp., a New York corporation (hereinafter referred to as "JPMP Capital Corp."), whose principal business office is located at the same address as JPMP (BHCA), and is also engaged in the venture capital and leveraged buyout business. Set forth in Schedule A hereto and incorporated herein by reference are the names, business addresses, principal occupations and employments of each executive officer and director of JPMP Capital Corp. JPMP Capital Corp. is a wholly owned subsidiary of J.P. Morgan Chase & Co., a Delaware corporation (hereinafter referred to as "JP Morgan Chase") which is engaged (primarily through subsidiaries) in the commercial banking business with its principal office located at 270 Park Avenue, New York, New York 10017. Set forth in Schedule B hereto and incorporated herein by reference are the names, business addresses, principal occupations and employments of each executive officer and director of JP Morgan Chase. Page 6 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 SCHEDULE A SCHEDULE A JPMP CAPITAL CORP. EXECUTIVE OFFICERS(1) President Jeffrey C. Walker* Chief Investment Officer Arnold L. Chavkin* Managing Director Dr. Dana Beth Ardi* Managing Director Christopher C. Behrens* Managing Director Julie Casella-Esposito* Managing Director Rodney A. Ferguson* Managing Director Cornell P. French* Managing Director Michael R. Hannon* Managing Director David J. Gilbert* Managing Director Jonathan R. Lynch* Managing Director Stephen P. Murray* Managing Director Timothy Purcell* Managing Director John Reardon* Managing Director Faith Rosenfeld* Managing Director Shahan D. Soghikian* Managing Director William Stuck* Managing Director Patrick J. Sullivan* Managing Director Timothy J. Walsh* Managing Director Richard D. Waters, Jr. * Managing Director Damion E. Wicker, M.D.* ____________________ (1) Each of whom is a United States citizen except for Messrs. Irigoin and Soghikian. * Principal occupation is employee and/or officer of J.P. Morgan Partners, LLC. Business address is c/o J.P. Morgan Partners, LLC, 1221 Avenue of the Americas, New York, New York 10020. Page 7 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 SCHEDULE B DIRECTORS(1) William B. Harrison** Jeffrey C. Walker* ____________________ (1) Each of whom is a United States citizen except for Messrs. Irigoin and Soghikian. * Principal occupation is employee and/or officer of J.P. Morgan Partners, LLC. Business address is c/o J.P. Morgan Partners, LLC, 1221 Avenue of the Americas, New York, New York 10020. ** Principal occupation is employee or officer of J.P. Morgan Chase & Co. Business address is c/o J.P. Morgan Chase & Co., 270 Park Avenue, New York, New York 10017. Page 8 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 SCHEDULE B J.P. MORGAN CHASE & CO. EXECUTIVE OFFICERS(1) Chairman of the Board and Chief Executive Officer William B. Harrison Jr.* President and Chief Operating Officer James Dimon* Vice Chairman, Chairman of Investment Bank and Head of Private Equity and Asset & Wealth Management David A. Coulter* Chief Information Officer Austin Adams* Chief Financial Officer Michael J. Cavanagh* Director of Human Resources, Head of Real Estate/Facilities, General Services, Security John J. Farrell* Co-General Counsel Joan Guggenheimer* Director of Corporate Marketing and Communications Frederick W. Hill* Co-General Counsel William H. McDavid* Head of JPMorgan Partners Jeffrey C. Walker** Chief Risk Officer Don M. Wilson III* ____________________ (1) Each of whom is a United States citizen. * Principal occupation is employee or officer of J.P. Morgan Chase & Co. Business address is c/o J.P. Morgan Chase & Co., 270 Park Avenue, New York, New York 10017. ** Principal occupation is employee and/or officer of J.P. Morgan Partners, LLC. Business address is c/o J.P. Morgan Partners, LLC, 1221 Avenue of the Americas, New York New York 10020. Page 9 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 DIRECTORS(2) NAME PRINCIPAL OCCUPATION OR EMPLOYMENT; BUSINESS OR RESIDENCE ADDRESS - -------------------------------------------------------------------------------- Hans W. Becherer Retired Chairman of the Board and Chief Executive Officer Deere & Company c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- John H. Biggs Former Chairman and CEO TIAA - CREF c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- Lawrence A. Bossidy Retired Chairman of the Board Honeywell International c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- Stephen B. Burke President Comcast Cable Communications, Inc. c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- James S. Crown President Henry Crown and Company c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- James Dimon President and Chief Operating Officer J.P. Morgan Chase & Co. 270 Park Avenue, 8th Floor New York, New York 10017-2070 - -------------------------------------------------------------------------------- Ellen V. Futter President and Trustee American Museum of Natural History c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- William H. Gray, III President and Chief Executive Officer The College Fund/UNCF c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- ____________________ 2 Each of whom is a United States citizen. Page 10 of 11

SCHEDULE 13G ISSUER: CMGI,INC. CUSIP NO.: 125750109 NAME PRINCIPAL OCCUPATION OR EMPLOYMENT; BUSINESS OR RESIDENCE ADDRESS - -------------------------------------------------------------------------------- William B. Harrison, Jr. Chairman of the Board and Chief Executive Officer J.P. Morgan Chase & Co. 270 Park Avenue, 8th Floor New York, New York 10017-2070 - -------------------------------------------------------------------------------- Laban P. Jackson, Jr. Chairman and Chief Executive Officer Clear Creek Properties, Inc. c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- Lee R. Raymond Chairman of the Board and Chief Executive Officer Exxon Mobil Corporation c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- John W. Kessler Owner John W. Kessler Company c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- Robert I. Lipp Chairman The St. Paul Travelers Companies, Inc. c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- Richard A. Monoogian Chairman and Chief Executive Officer Masco Corporation c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- David C. Novak Chairman and Chief Executive Officer Yum! Brands, Inc. c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- John R. Stafford Retired Chairman of the Board Wyeth c/o J.P. Morgan Chase & Co. 270 Park Avenue New York, New York 10017 - -------------------------------------------------------------------------------- Page 11 of 11