OMB APPROVAL -------------------------- OMB Number: 3235-0006 Expires: October 31, 2003 Estimated average burden hours per response....23.3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2007 --------------------------- 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: Piper Jaffray Companies ------------------------------------------ Address: 800 Nicollet Mall ------------------------------------------ Suite 800 ------------------------------------------ Minneapolis, MN 55402-7020 ------------------------------------------ Form 13F File Number: 28-10776 ------------- 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: Greg Meyer -------------------------------------------- Title: Controller -------------------------------------------- Phone: 612-303-6000 -------------------------------------------- Signature, Place, and Date of Signing: /s/ Greg Meyer Minneapolis, MN 5/10/07 --------------------- -------------------------------------- ------------- [Signature] [City, State] [Date] 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 reporting manager(s).) FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 ----------------------- Form 13F Information Table Entry Total: 57 ----------------------- Form 13F Information Table Value Total: $ 65,488 ----------------------- (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. NONE COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 TITLE OF VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER NAME OF ISSUER CLASS CUSIP (X$1000 PRN AMT PRN CALL DISCRETION MANAGERS SOLE SHARED NONE ----------------------------------------------------------------------------------------------------------------------------------- ACCURAY INC COM 004397105 2 100 SH SOLE 100 0 0 ADVANCED MEDICAL OPTIC COM 00763M108 223 6,000 SH SOLE 6,000 0 0 ALEXION PHARMACEUTICAL NOTE 1.375% 2/0 015351AF6 9,226 6,130,000 PRN SOLE 6,130,000 0 0 ALLSCRIPTS HEALTHCARE COM 01988P108 2 63 SH SOLE 63 0 0 AMERICAN MED SYS HLDGS NOTE 3.250% 7/0 02744MAA6 9,280 7,307,000 PRN SOLE 7,307,000 0 0 ANTHRACITE CAP INC COM 037023108 62 5,188 SH SOLE 5,188 0 0 BIOMARIN PHARMACEUTICA NOTE 2.500% 3/2 09061GAC5 3,172 2,500,000 PRN SOLE 2,500,000 0 0 CALLIDUS SOFTWARE INC COM 13123E500 6 743 SH SOLE 743 0 0 CAPELLA EDUCATION COMP COM 139594105 3 89 SH SOLE 89 0 0 CERADYNE INC COM 156710105 1,369 25,000 SH PUT SOLE 25,000 0 0 CERADYNE INC NOTE 2.875%12/1 156710AA3 1,773 1,535,000 PRN SOLE 1,535,000 0 0 CORNING INC COM 219350105 796 35,000 SH SOLE 35,000 0 0 CORNING INC COM 219350105 1,137 50,000 SH PUT SOLE 50,000 0 0 CREDENCE SYS CORP NOTE 1.500% 5/1 225302AF5 5,610 6,000,000 PRN SOLE 6,000,000 0 0 CROCS INC COM 227046109 5 100 SH SOLE 100 0 0 CUBIST PHARMACEUTICALS NOTE 2.250% 6/1 229678AC1 4,869 5,000,000 PRN SOLE 5,000,000 0 0 CYTYC CORP NOTE 2.250% 3/1 232946AB9 7,054 5,758,000 PRN SOLE 5,758,000 0 0 DIODES INC NOTE 2.250%10/0 254543AA9 2,786 3,000,000 PRN SOLE 3,000,000 0 0 EMAGEON INC COM 29076V109 287 26,075 SH SOLE 26,075 0 0 F5 NETWORKS INC COM 315616102 7 100 SH SOLE 100 0 0 FEI CO COM 30241L109 902 25,000 SH PUT SOLE 25,000 0 0 FEI CO NOTE 6/1 30241LAD1 3,747 2,755,000 PRN SOLE 2,755,000 0 0 GENOMIC HEALTH INC COM 37244C101 7 405 SH SOLE 405 0 0 GENZYME CORP COM 372917104 504 8,400 SH SOLE 8,400 0 0 HALLMARK FINL SVCS IN COM NEW 40624Q203 9 760 SH SOLE 760 0 0 HUTCHINSON TECHNOLOGY COM 448407106 210 9,000 SH SOLE 9,000 0 0 HUTCHINSON TECHNOLOGY COM 448407106 701 30,000 SH PUT SOLE 30,000 0 0 HYDROGEN CORP COM 44887Q108 617 128,875 SH SOLE 128,875 0 0 LIFECORE BIOMEDICAL I COM 532187101 11 570 SH SOLE 570 0 0 LIGAND PHARMACEUTICAL CL B 53220K207 1 100 SH SOLE 100 0 0 MANNKIND CORP COM 56400P201 3 210 SH SOLE 210 0 0 MATHSTAR INC COM 576801203 302 109,988 SH SOLE 109,988 0 0 MEDICINES CO COM 584688105 7 287 SH SOLE 287 0 0 METABASIS THERAPEUTIC COM 59101M105 5 617 SH SOLE 617 0 0 MILLENNIUM PHARMACEU NOTE 2.250%11/1 599902AD5 4,218 4,250,000 PRN SOLE 4,250,000 0 0 NMS COMMUNICATIONS COR COM 629248105 107 60,000 SH SOLE 60,000 0 0 NXSTAGE MEDICAL INC COM 67072V103 9 698 SH SOLE 698 0 0 NYSE GROUP INC COM 62949W103 5,198 55,440 SH SOLE 55,440 0 0 PATRIOT CAPITAL FUNDIN COM 70335Y104 1 100 SH SOLE 100 0 0 PHILADELPHIA CONS HLDG COM 717528103 3 75 SH SOLE 75 0 0 REGENERX BIOPHARMACEUT COM 75886X108 69 30,333 SH SOLE 30,333 0 0 ROCK-TENN CO CL A 772739207 7 200 SH SOLE 200 0 0 ROYAL BK SCOTLAND GROU ADR PREF SER N 780097770 115 4,500 SH SOLE 4,500 0 0 SOURCE INTERLINK COS I COM NEW 836151209 16 2,322 SH SOLE 2,322 0 0 SPANSION INC COM CL A 84649R101 122 10,000 SH SOLE 10,000 0 0 SPANSION INC COM CL A 84649R101 290 23,800 SH PUT SOLE 23,800 0 0 SYBASE INC NOTE 1.750% 2/2 871130AB6 342 301,000 PRN SOLE 301,000 0 0 SYNTA PHARMACEUTICALS COM 87162T206 2 200 SH SOLE 200 0 0 TECHWELL INC COM 87874D101 118 9,474 SH SOLE 9,474 0 0 TEMPUR PEDIC INTL INC COM 88023U101 5 200 SH SOLE 200 0 0 THORATEC CORP COM NEW 885175307 2 100 SH SOLE 100 0 0 TIVO INC COM 888706108 2 300 SH SOLE 300 0 0 TRIAD GTY INC COM 895925105 41 1,000 SH SOLE 1,000 0 0 U.S. AUTO PARTS NETWOR COM 90343C100 19 3,600 SH SOLE 3,600 0 0 ULTRA CLEAN HLDGS INC COM 90385V107 3 200 SH SOLE 200 0 0 US BIOENERGY CORP COM 90342V109 57 5,000 SH SOLE 5,000 0 0 XTENT INC COM 984141101 47 4,150 SH SOLE 4,150 0 0