<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 13F
Form 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: December 31, 1999
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: 28-______
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
May 12, 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).)
<PAGE>
Form 13F SUMMARY PAGE
REPORTING MANAGER: CMGI, Inc.
Report Summary:
Number of Other Included Managers: 3
Form 13F Information Table Entry Total: 17
--------
Form 13F Information Table Value Total: $ 6,986,871 (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. 28-_________
2. CMG@Ventures Capital Corp. File No. 28-_________
3. CMG@Ventures Securities Corp. File No. 28-_________
<PAGE>
FORM 13F INFORMATION TABLE
REPORTING MANAGER: CMGI, Inc.
<TABLE>
<CAPTION>
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
-------------- ------- ------- ------ --------- --- ---------- -------- ---- ------ ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
Akamai Technologies,
Inc. COM 00971T101 81,906 250,000 SH SOLE 250,000
Engage, Inc. (formerly
Engage Technologies,
Inc.) COM 292827102 2,612,507 87,083,572 SH SOLE 87,083,572
Hollywood Entertainment
Corporation COM 436141105 33,755 2,327,934 SH SOLE 2,327,934
Informix Corporation COM 456779107 1,343 117,396 SH DEFINED 117,396
Lycos, Inc. COM 550818108 308,484 3,877,276 SH SOLE 3,877,276
Lycos, Inc. COM 550818108 383,815 4,824,096 SH DEFINED 1 4,824,096
Lycos, Inc. COM 550818108 399,652 5,023,156 SH DEFINED 2 5,023,156
Lycos, Inc. COM 550818108 170,840 2,147,258 SH DEFINED 3 2,147,258
Mail.com, Inc. COM 560311102 1,830 97,611 SH DEFINED 97,611
USWeb Corporation COM 917327108 58 1,302 SH SOLE 1,302
USWeb Corporation COM 917327108 783 17,622 SH DEFINED 1 17,622
USWeb Corporation COM 917327108 5,727 128,865 SH DEFINED 3 128,865
Marketing Services
Group, Inc. COM 570907105 37,722 2,252,061 SH SOLE 2,252,061
NaviSite, Inc. COM 63935M109 1,953,360 39,067,200 SH SOLE 39,067,200
Open Market, Inc. COM 68370M100 5,707 126,473 SH SOLE 126,473
Yahoo! Inc. COM 984332106 175,624 811,780 SH DEFINED 1 811,780
Yahoo! Inc. COM 984332106 813,758 3,761,408 SH DEFINED 3 3,761,408
</TABLE>
(all share amounts have been adjusted to reflect all stock splits that have
occurred prior to the date of the filing of this Form 13F)
