13F-HR 1 b86709e13fvhr.txt 13F-HR ================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F Cover Page Report for the Calendar Year or Quarter End: 03/31/11 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 Information Table Entry Total: 0 Form 13F Information Table Value Total: $ 0~~

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 13F INFORMATION TABLE FORM 13F INFORMATION TABLE AS OF DATE: March 31, 2011

MATRIX VI MANAGEMENT CO LLC 13F-HR