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, 2008 Check here if Amendment [ ]; Amendment Number: This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: D.B. Zwirn & Co., L.P. Address: 745 Fifth Avenue, 18th Floor New York, New York 10151 13F File Number: 28-11291 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: Name: Lawrence Cutler Title: Officer Phone: (646) 720-9100 Signature, Place, and Date of Signing: Lawrence Cutler New York, New York February 06, 2009 Report Type (Check only one.): [ X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 Form13F Information Table Entry Total: 10 Form13F Information Table Value Total: $64,068 (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional managers with respect to which this report is filed, other than the manager filing this report. NONE FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE - ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- AES CORP COM 00130H105 824 100000 SH PUT SOLE 100000 0 0 AMBASSADORS INTL INC NOTE 3.750% 4/1 023178AA4 93 8000000 SH SOLE 8000000 0 0 AMERICAN TOWER CORP CL A 029912201 22283 760000 SH PUT SOLE 760000 0 0 CABLEVISION SYS CORP CL A NY CABLVS 12686C109 4176 248000 SH PUT SOLE 248000 0 0 CEPHALON INC COM 156708109 19260 250000 SH PUT SOLE 250000 0 0 JOHNSON OUTDOORS INC CL A 479167108 2306 413809 SH SOLE 413809 0 0 LEAR CORP COM 521865105 212 150000 SH PUT SOLE 150000 0 0 MERIX CORP NOTE 4.000% 5/1 590049AB8 97 5250000 SH SOLE 5250000 0 0 NAVISTAR INTL CORP NEW COM 63934E108 13801 645500 SH PUT SOLE 645500 0 0 VERIZON COMMUNICATIONS INC COM 92343V104 1016 29978 SH SOLE 29978 0 0