UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: September 30, 2000 Check here if Amendment [ ]; Amendment Number: _____ This Amendment (Check only one): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: CMGI, Inc. 100 Brickstone Square Andover, MA 01810 Form 13F File Number: 028-05757 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Andrew J. Hajducky, III Executive Vice President, Chief Financial Officer and Treasurer (978) 684-3600 Signature, Place and Date of Signing: /s/ Andrew J. Hajducky, III - ------------------------------- Andover, Massachusetts November 13, 2000 Report Type (Check only one): [X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [ ] 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) [ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other manager(s).)

Form 13F SUMMARY PAGE REPORTING MANAGER: CMGI, Inc. Report Summary: Number of Other Included Managers: 3 Form 13F Information Table Entry Total: 30 --------- Form 13F Information Table Value Total: $ 3,643,396 (thousands) ------------ List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. 1. CMG@Ventures, Inc. File No. 028-05751 2. CMG@Ventures Capital Corp. File No. 028-05755 3. CMG@Ventures Securities Corp. File No. 028-05763

FORM 13F INFORMATION TABLE REPORTING MANAGER: CMGI, Inc. ITEM 4: ITEM 5: FAIR SHARES ITEM 8: ITEM 2: ITEM 3: MARKET OR ITEM 6: VOTING AUTHORITY ITEM 1: TITLE OF CUSIP VALUE PRINCIPAL SH/ INVESTMENT ITEM 7: (A) (B) (C) NAME OF ISSUER CLASS NUMBER (000) AMOUNT PRN DISCRETION MANAGERS SOLE SHARED NONE Akamai Technologies, Inc. COM 00971T101 13,129 250,000 SH SOLE 250,000 Critical Path, Inc. COM 22674V100 8,141 134,000 SH SOLE 134,000 Critical Path, Inc. COM 22674V100 799 13,158 SH DEFINED 1 13,158 Critical Path, Inc. COM 22674V100 36,611 602,645 SH DEFINED 2 602,645 eMachines, Inc. COM 29076P102 1,134 1,100,056 SH DEFINED 1,100,056 Engage, Inc. COM 292827102 1,256,441 154,638,839 SH SOLE 154,638,839 GLOBALMEDIA.COM COM 37935A109 2,213 2,082,430 SH DEFINED 2,082,430 Hollywood Entertainment Corporation COM 436141105 17,314 2,327,934 SH SOLE 2,327,934 Hollywood Entertainment Corporation COM 436141105 151 20,297 SH DEFINED 1 20,297 Hollywood Entertainment Corporation COM 436141105 14,945 2,009,378 SH DEFINED 2 2,009,378 Kana Communications, Inc. COM 483600102 822 36,922 SH DEFINED 1 36,922 Kana Communications, Inc. COM 483600102 5,603 251,813 SH DEFINED 3 251,813 Lycos, Inc. COM 550818108 234,888 3,415,777 SH DEFINED 1 3,415,777 Lycos, Inc. COM 550818108 617,563 8,980,690 SH DEFINED 3 8,980,690 Mail.com, Inc. COM 560311102 525 100,669 SH DEFINED 100,669 marchFIRST, Inc. COM 966834103 18 1,126 SH SOLE 1,126 marchFIRST, Inc. COM 966834103 239 15,243 SH DEFINED 1 15,243 marchFIRST, Inc. COM 966834103 1,749 111,468 SH DEFINED 3 111,468 Marketing Services Group, Inc. COM 570907105 6,756 2,252,061 SH SOLE 2,252,061 NaviSite, Inc. COM 63935M109 1,080,624 40,115,979 SH SOLE 40,115,979 Netcentives, Inc. COM 64108P101 12,973 1,694,492 SH SOLE 1,694,492 Open Market, Inc. COM 68370M100 794 126,473 SH SOLE 126,473 priceline.com Incorporated COM 741503106 59 5,000 SH DEFINED 5,000 PRIMEDIA Inc. COM 74157K101 131,000 8,000,000 SH SOLE 8,000,000 Value America, Inc. COM 92038N102 2 13,000 SH DEFINED 13,000 Ventro Corporation COM 163595101 10,141 921,908 SH DEFINED 2 921,908 Vicinity Corporation COM 925653107 60,643 5,513,024 SH DEFINED 1 5,513,024 Virage, Inc. COM 92763Q106 18,186 1,077,709 SH DEFINED 1,077,709 Yahoo! Inc. COM 984332106 52,679 578,885 SH DEFINED 1 578,885 Yahoo! Inc. COM 984332106 57,256 629,183 SH DEFINED 3 629,183