13F-HR 1 b80935e13fvhr.txt MATRIX VI MANAGEMENT CO. L.L.C. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F Cover Page Report for the Calendar Year or Quarter End: 3/31/2010 Matrix VI Management Co., L.L.C. Name of Institutional Investment Manager 1000 Winter Street, Suite 4500 Waltham MA 02451 Business Address (Street) (City) (State) (Zip) 13F File Number: 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 herein is true, correct and complete, and that it is understood that all required items, statements, schedules, and tables, are considered integral parts of this form. Name, Title and Telephone Number of Person Submitting Report: Timothy A. Barrows Authorized Member 781-890-2244 ------------------------- ------------------------- ------------------------ (Name) (Title) (Phone) Signature, Place and Date of Signing: /s/ Timothy A. Barrows ------------------------------------- Report Type: [X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARY PAGE Number of Other Included Managers: None List of Other Included Managers: None Form 13F File Number: Name: No. Form 13F Information Table Entry Total: 2 Form 13F Information Table Value Total: $131,324 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 13F INFORMATION TABLE FORM 13F INFORMATION TABLE AS OF DATE: March 31, 2010

ITEM 1 ITEM 2 ITEM 3 ITEM 4 ITEM 5 ITEM 6 ITEM 7 ITEM 8 -------------- -------------- ----------- -------- ---------------------- ------- --------- ---------------- VALUE SHARES/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT SH/PRN CALL DSCRETN MANAGERS* SOLE SHARED NONE -------------- -------------- ----------- -------- ---------- ------ ---- ------- --------- ---- ------ ---- Airvana, Inc. Common 00950V 10 1 7778,~~997~~613 10,262,760 Sole None Sole Netezza Corporation Common 64111N 10 1 6052,~~059~~711 64,~~185~~121,272 Sole None Sole

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