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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 13F

Form 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: June 30, 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: 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: Tim Carter
Title: Treasurer
Phone: 612 303-6000

Signature, Place, and Date of Signing: 

Tim Carter Minneapolis, MN 8/11/08
------------------------------------- ---------------------- ---------------
[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: 234

Form 13F Information Table Value Total: $ 111,055
 (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
---------------------------- ---------------- --------- -------- ------------------ ---------- -------- ---------------------
 Value SHRS OR SH/ PUT/ INVESTMENT OTHER
NAME OF ISSUER TITLE OF CLASS CUSIP (X$1000) PRN AMT PRN CALL DISCRETION MANAGERS SOLE SHARED NONE
-------------- ---------------- --------- -------- --------- --- ---- ---------- -------- --------- ------ ----
ACXIOM CORP COM 005125109 1 61 SH 61 0 0
ADVANCED MICRO DEVICES INC NOTE 5.750% 8/1 007903AN7 368 500,000 PRN 500,000 0 0
AFFILIATED MANAGERS GROUP COM 008252108 5 50 SH 50 0 0
AFFIRMATIVE INS HLDGS INC COM 008272106 1 99 SH 99 0 0
AFFYMETRIX INC COM 00826T108 6 600 SH 600 0 0
AIRGAS INC COM 009363102 9 150 SH 150 0 0
ALIGN TECHNOLOGY INC COM 016255101 7 704 SH 704 0 0
ALLSCRIPTS HEALTHCARE SOLUTI COM 01988P108 93 7,500 SH 7,500 0 0
ALUMINUM CORP CHINA LTD SPON ADR H SHS 022276109 23 800 SH 800 0 0
AMERICAN MED SYS HLDGS INC COM 02744M108 180 12,010 SH 12,010 0 0
AMERICAN MED SYS HLDGS INC NOTE 3.250% 7/0 02744MAA6 5,583 5,726,000 PRN 5,726,000 0 0
AMERICAN TOWER CORP CL A 029912201 6 150 SH 150 0 0
AMERIGROUP CORP NOTE 2.000% 5/1 03073TAB8 3,669 4,400,000 PRN 4,400,000 0 0
AMR CORP COM 001765106 3 600 SH 600 0 0
AMYLIN PHARMACEUTICALS INC NOTE 3.000% 6/1 032346AF5 3,270 4,000,000 PRN 4,000,000 0 0
ANDERSONS INC COM 034164103 4 100 SH 100 0 0
ANHEUSER BUSCH COS INC COM 035229103 62 1,000 SH CALL 1,000 0 0
ANHEUSER BUSCH COS INC COM 035229103 1,056 17,000 SH PUT 17,000 0 0
ANHEUSER BUSCH COS INC COM 035229103 932 15,000 SH 15,000 0 0
ANNALY CAP MGMT INC COM 035710409 9 550 SH 550 0 0
APP PHARMACEUTICALS INC COM 00202H108 25 1,500 SH 1,500 0 0
APPLE INC COM 037833100 502 3,000 SH CALL 3,000 0 0
APPLE INC COM 037833100 837 5,000 SH PUT 5,000 0 0
APPLE INC COM 037833100 486 2,900 SH 2,900 0 0
ARM HLDGS PLC SPONSORED ADR 042068106 6 1,100 SH 1,100 0 0
ARRIS GROUP INC COM 04269Q100 5 600 SH 600 0 0
ASSURANT INC COM 04621X108 7 100 SH 100 0 0
ATLAS AMER INC COM 049167109 18 400 SH 400 0 0
ATS MED INC NOTE 6.000%10/1 002083AB9 2,670 3,000,000 PRN 3,000,000 0 0
AXIS CAPITAL HOLDINGS SHS G0692U109 9 300 SH 300 0 0
BARE ESCENTUALS INC COM 067511105 2 100 SH 100 0 0
BARRICK GOLD CORP COM 067901108 23 500 SH 500 0 0
BAYTEX ENERGY TR TRUST UNIT 073176109 21 600 SH 600 0 0
BOEING CO COM 097023105 131 2,000 SH 2,000 0 0
BUNGE LIMITED COM G16962105 22 200 SH 200 0 0
CALIFORNIA PIZZA KITCHEN INC COM 13054D109 46 4,074 SH 4,074 0 0
CAMERON INTERNATIONAL CORP NOTE 2.500% 6/1 13342BAB1 3,373 2,000,000 PRN 2,000,000 0 0
CARRIZO OIL & CO INC NOTE 4.375% 6/0 144577AA1 2,053 2,000,000 PRN 2,000,000 0 0
CENTRAL EUROPEAN DIST CORP NOTE 3.000% 3/1 153435AA0 1,270 1,000,000 PRN 1,000,000 0 0
CENTRAL FD CDA LTD CL A 153501101 25 1,900 SH 1,900 0 0
CHICOS FAS INC COM 168615102 3 600 SH 600 0 0
CHINA MED TECHNOLOGIES INC SPONSORED ADR 169483104 25 500 SH 500 0 0
CIENA CORP NOTE 0.250% 5/0 171779AB7 3,718 4,500,000 PRN 4,500,000 0 0
CIMAREX ENERGY CO COM 171798101 21 300 SH 300 0 0
CIT GROUP INC COM 125581108 4 600 SH 600 0 0
CITIZENS REPUBLIC BANCORP IN COM 174420109 2 600 SH 600 0 0
CLARCOR INC COM 179895107 21 600 SH 600 0 0
COGNIZANT TECHNOLOGY SOLUTIO CL A 192446102 8 250 SH 250 0 0
COMMSCOPE INC COM 203372107 11 200 SH 200 0 0
COMPELLENT TECHNOLOGIES INC COM 20452A108 115 10,000 SH 10,000 0 0
COMPLETE PRODUCTION SERVICES COM 20453E109 29 800 SH 800 0 0
COMSCORE INC COM 20564W105 22 1,000 SH 1,000 0 0
COMTECH TELECOMMUNICATIONS C COM NEW 205826209 7 150 SH 150 0 0
CORE LABORATORIES LP NOTE 0.250%10/3 21868FAB9 7,048 4,500,000 PRN 4,500,000 0 0
CORE LABORATORIES N V COM N22717107 1,167 8,200 SH 8,200 0 0
CORRECTIONS CORP AMER NEW COM NEW 22025Y407 10 350 SH 350 0 0
COVANCE INC COM 222816100 17 200 SH 200 0 0
COVANTA HLDG CORP DBCV 1.000% 2/0 22282EAA0 1,760 1,658,000 PRN 1,658,000 0 0
CREE INC COM 225447101 203 8,887 SH 8,887 0 0
CVR ENERGY INC COM 12662P108 2 100 SH 100 0 0
CVS CAREMARK CORPORATION COM 126650100 138 3,500 SH 3,500 0 0
DELPHI FINL GROUP INC CL A 247131105 6 250 SH 250 0 0
DELTA AIR LINES INC DEL COM NEW 247361702 3 600 SH 600 0 0
DIGITAL RLTY TR INC COM 253868103 8 200 SH 200 0 0
DIODES INC COM 254543101 10 350 SH 350 0 0
DIODES INC NOTE 2.250%10/0 254543AA9 3,421 3,500,000 PRN 3,500,000 0 0
DOLLAR FINL CORP COM 256664103 14 910 SH 910 0 0
DOLLAR FINL CORP NOTE 2.875% 6/3 256664AB9 731 1,000,000 PRN 1,000,000 0 0
DRS TECHNOLOGIES INC COM 23330X100 874 11,100 SH CALL 11,100 0 0
E TRADE FINANCIAL CORP COM 269246104 628 200,000 SH 200,000 0 0
EINSTEIN NOAH REST GROUP INC COM 28257U104 2 201 SH 201 0 0
ELECTRONIC ARTS INC COM 285512109 38 858 SH 858 0 0
ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 29273R109 22 500 SH 500 0 0
ENPRO INDS INC DBCV 3.937%10/1 29355XAB3 133 100,000 PRN 100,000 0 0
EOG RES INC COM 26875P101 328 2,500 SH CALL 2,500 0 0


EOG RES INC COM 26875P101 656 5,000 SH PUT 5,000 0 0
EOG RES INC COM 26875P101 459 3,500 SH 3,500 0 0
EQUINIX INC NOTE 3.000%10/1 29444UAG1 4,290 4,000,000 PRN 4,000,000 0 0
ESSEX PPTY TR INC COM 297178105 11 100 SH 100 0 0
EV3 INC COM 26928A200 82 8,700 SH 8,700 0 0
EVERGREEN SOLAR INC COM 30033R108 10 1,000 SH 1,000 0 0
EXPEDIA INC DEL COM 30212P105 37 2,000 SH PUT 2,000 0 0
EXPEDIA INC DEL COM 30212P105 18 1,000 SH 1,000 0 0
FEDERAL HOME LN MTG CORP COM 313400301 10 600 SH 600 0 0
FEDERAL NATL MTG ASSN COM 313586109 13 687 SH 687 0 0
FINISAR NOTE 5.250%10/1 31787AAC5 4,950 5,000,000 PRN 5,000,000 0 0
FLOWERS FOODS INC COM 343498101 9 300 SH 300 0 0
FMC TECHNOLOGIES INC COM 30249U101 19 250 SH 250 0 0
FOSSIL INC COM 349882100 10 346 SH 346 0 0
FOUNDATION COAL HLDGS INC COM 35039W100 9 100 SH 100 0 0
FUEL SYS SOLUTIONS INC COM 35952W103 23 600 SH 600 0 0
GAMESTOP CORP NEW CL A 36467W109 40 1,000 SH 1,000 0 0
GENERAL CABLE CORP DEL NEW COM 369300108 12 200 SH 200 0 0
GEORESOURCES INC COM 372476101 13 700 SH 700 0 0
GREATBATCH INC SDCV 2.250% 6/1 39153LAB2 2,116 2,770,000 PRN 2,770,000 0 0
GUESS INC COM 401617105 2,105 56,200 SH CALL 56,200 0 0
GUESS INC COM 401617105 1,498 40,000 SH PUT 40,000 0 0
GUESS INC COM 401617105 225 6,000 SH 6,000 0 0
HALLMARK FINL SVCS INC EC COM NEW 40624Q203 1 100 SH 100 0 0
HASBRO INC COM 418056107 21 600 SH 600 0 0
HERCULES TECH GROWTH CAP INC COM 427096508 2 236 SH 236 0 0
HERSHEY CO COM 427866108 161 4,900 SH CALL 4,900 0 0
HERSHEY CO COM 427866108 66 2,000 SH PUT 2,000 0 0
HERSHEY CO COM 427866108 66 2,000 SH 2,000 0 0
HIRERIGHT INC COM 433538105 1 49 SH 49 0 0
HOLOGIC INC COM 436440101 111 5,100 SH 5,100 0 0
HUGOTON RTY TR TEX UNIT BEN INT 444717102 22 600 SH 600 0 0
HUNTSMAN CORP COM 447011107 400 35,100 SH CALL 35,100 0 0
HUNTSMAN CORP COM 447011107 171 15,000 SH PUT 15,000 0 0
HUNTSMAN CORP COM 447011107 120 10,500 SH 10,500 0 0
ICONIX BRAND GROUP INC NOTE 1.875% 6/3 451055AB3 4,560 6,000,000 PRN 6,000,000 0 0
IDEX CORP COM 45167R104 22 600 SH 600 0 0
IDEXX LABS INC COM 45168D104 19 400 SH 400 0 0
IHS INC CL A 451734107 14 200 SH 200 0 0
ILLUMINA INC COM 452327109 17 200 SH 200 0 0
IMCLONE SYS INC COM 45245W109 405 10,000 SH CALL 10,000 0 0
IMCLONE SYS INC COM 45245W109 162 4,000 SH 4,000 0 0
INCYTE CORP COM 45337C102 114 15,000 SH 15,000 0 0
INNOPHOS HOLDINGS INC COM 45774N108 26 800 SH 800 0 0
INTERNATIONAL SPEEDWAY CORP CL A 460335201 23 600 SH 600 0 0
INTREPID POTASH INC COM 46121Y102 3 50 SH 50 0 0
INVERNESS MED INNOVATIONS IN COM 46126P106 647 19,500 SH CALL 19,500 0 0
INVERNESS MED INNOVATIONS IN COM 46126P106 10 300 SH 300 0 0
ITC HLDGS CORP COM 465685105 18 350 SH 350 0 0
ITT EDUCATIONAL SERVICES INC COM 45068B109 25 300 SH 300 0 0
IXYS CORP COM 46600W106 16 1,300 SH 1,300 0 0
JA SOLAR HOLDINGS CO LTD NOTE 4.500% 5/1 466090AA5 3,098 3,500,000 PRN 3,500,000 0 0
JABIL CIRCUIT INC COM 466313103 10 600 SH 600 0 0
KINDER MORGAN ENERGY PARTNER UT LTD PARTNER 494550106 22 400 SH 400 0 0
KOPPERS HOLDINGS INC COM 50060P106 8 200 SH 200 0 0
KRISPY KREME DOUGHNUTS INC COM 501014104 1 200 SH 200 0 0
LABORATORY CORP AMER HLDGS COM NEW 50540R409 10 150 SH 150 0 0
LANDSTAR SYS INC COM 515098101 8 150 SH 150 0 0
LASALLE HOTEL PPTYS COM SH BEN INT 517942108 6 250 SH 250 0 0
LAWSON SOFTWARE INC NEW NOTE 2.500% 4/1 52078PAA0 2,749 3,000,000 PRN 3,000,000 0 0
LEAPFROG ENTERPRISES INC CL A 52186N106 45 5,400 SH 5,400 0 0
LEGG MASON INC UNIT 99/99/9999 524901303 210 5,000 SH 5,000 0 0
LEHMAN BROS HLDGS INC COM 524908100 119 6,000 SH PUT 6,000 0 0
LEHMAN BROS HLDGS INC 7.25%CONV SR P 52523J453 321 400 SH 400 0 0
LIONS GATE ENTMNT CORP COM NEW 535919203 26 2,500 SH 2,500 0 0
LKQ CORP COM 501889208 16 900 SH 900 0 0
LOGITECH INTL S A SHS H50430232 8 300 SH 300 0 0
LSI CORPORATION COM 502161102 6 932 SH 932 0 0
LUMBER LIQUIDATORS INC COM 55003Q103 130 10,000 SH 10,000 0 0
MAGMA DESIGN AUTOMATION NOTE 2.000% 5/1 559181AC6 2,410 2,869,000 PRN 2,869,000 0 0
MCCORMICK & SCHMICKS SEAFD R COM 579793100 17 1,800 SH 1,800 0 0
MCMORAN EXPLORATION CO COM 582411104 33 1,200 SH 1,200 0 0
MEDAREX INC COM 583916101 4 600 SH 600 0 0
MEDIVATION INC COM 58501N101 56 4,700 SH 4,700 0 0
MERRILL LYNCH & CO INC COM 590188108 412 13,000 SH CALL 13,000 0 0
MERRILL LYNCH & CO INC COM 590188108 381 12,000 SH PUT 12,000 0 0
MERRILL LYNCH & CO INC COM 590188108 48 1,500 SH 1,500 0 0
METABOLIX INC COM 591018809 74 7,600 SH 7,600 0 0
MICROSOFT CORP COM 594918104 275 10,000 SH 10,000 0 0
MOBILE MINI INC COM 60740F105 24 1,200 SH 1,200 0 0
MOTOROLA INC COM 620076109 5 626 SH 626 0 0


NABORS INDUSTRIES LTD SHS G6359F103 25 500 SH 500 0 0
NICE SYS LTD SPONSORED ADR 653656108 6 200 SH 200 0 0
NIGHTHAWK RADIOLOGY HLDGS IN COM 65411N105 13 1,852 SH 1,852 0 0
NMS COMMUNICATIONS CORP COM 629248105 67 60,000 SH 60,000 0 0
NORTHWEST AIRLS CORP COM 667280408 4 600 SH 600 0 0
NOVATEL WIRELESS INC COM NEW 66987M604 7 600 SH 600 0 0
NOVO-NORDISK A S ADR 670100205 20 300 SH 300 0 0
NYSE EURONEXT COM 629491101 2,809 55,440 SH 55,440 0 0
OGE ENERGY CORP COM 670837103 22 700 SH 700 0 0
OIL STS INTL INC COM 678026105 13 200 SH 200 0 0
OLYMPIC STEEL INC COM 68162K106 30 400 SH 400 0 0
OMNICELL INC COM 68213N109 8 600 SH 600 0 0
ON SEMICONDUCTOR CORP NOTE 4/1 682189AE5 5,500 5,000,000 PRN 5,000,000 0 0
OSI PHARMACEUTICALS INC NOTE 2.000%12/1 671040AF0 378 250,000 PRN 250,000 0 0
P F CHANGS CHINA BISTRO INC COM 69333Y108 322 14,400 SH 14,400 0 0
PAETEC HOLDING CORP COM 695459107 10 1,500 SH 1,500 0 0
PAREXEL INTL CORP COM 699462107 24 900 SH 900 0 0
PATRIOT CAPITAL FUNDING INC COM 70335Y104 6 946 SH 946 0 0
PERMIAN BASIN RTY TR UNIT BEN INT 714236106 24 900 SH 900 0 0
PETROLEUM DEV CORP COM 716578109 20 300 SH 300 0 0
PHARMERICA CORP COM 71714F104 2,236 99,000 SH CALL 99,000 0 0
POWERSHARES QQQ TRUST UNIT SER 1 73935A104 452 10,000 SH PUT 10,000 0 0
POWERSHARES QQQ TRUST UNIT SER 1 73935A104 452 10,000 SH 10,000 0 0
PRECISION DRILLING TR TR UNIT 740215108 25 900 SH 900 0 0
PROSHARES TR ULTRASHT SP500 74347R883 500 7,500 SH 7,500 0 0
QUALCOMM INC COM 747525103 244 5,500 SH 5,500 0 0
QUANEX BUILDING PRODUCTS COR COM 747619104 6 400 SH 400 0 0
RALCORP HLDGS INC NEW COM 751028101 25 500 SH 500 0 0
RIVERBED TECHNOLOGY INC COM 768573107 8 600 SH 600 0 0
ROYAL BK SCOTLAND GROUP PLC SP ADR L RP PF 780097788 48 3,000 SH 3,000 0 0
RPC INC COM 749660106 18 1,100 SH 1,100 0 0
RUBY TUESDAY INC COM 781182100 3 600 SH 600 0 0
SALESFORCE COM INC COM 79466L302 68 1,000 SH 1,000 0 0
SALIX PHARMACEUTICALS INC COM 795435106 176 25,000 SH 25,000 0 0
SELECT SECTOR SPDR TR SBI INT-FINL 81369Y605 906 44,700 SH PUT 44,700 0 0
SELECT SECTOR SPDR TR SBI INT-FINL 81369Y605 956 47,200 SH 47,200 0 0
SESI L L C NOTE 1.500%12/1 78412FAH7 4,006 2,976,000 PRN 2,976,000 0 0
SI INTL INC COM 78427V102 6 300 SH 300 0 0
SIGNATURE BK NEW YORK N Y COM 82669G104 6 250 SH 250 0 0
SILICON IMAGE INC COM 82705T102 24 3,300 SH 3,300 0 0
SLM CORP COM 78442P106 10 500 SH 500 0 0
SMITH MICRO SOFTWARE INC COM 832154108 1 100 SH 100 0 0
SNAP ON INC COM 833034101 12 230 SH 230 0 0
SONOSITE INC NOTE 3.750% 7/1 83568GAA2 2,513 2,500,000 PRN 2,500,000 0 0
SOUTHWESTERN ENERGY CO COM 845467109 14 300 SH 300 0 0
SOVEREIGN BANCORP INC COM 845905108 4 500 SH 500 0 0
SPDR TR UNIT SER 1 78462F103 38 300 SH 300 0 0
STARENT NETWORKS CORP COM 85528P108 91 7,264 SH 7,264 0 0
SWITCH & DATA FACILITIES COM COM 871043105 56 3,300 SH 3,300 0 0
TALBOTS INC COM 874161102 35 3,000 SH 3,000 0 0
TARGET CORP COM 87612E106 418 9,000 SH PUT 9,000 0 0
TARGET CORP COM 87612E106 418 9,000 SH 9,000 0 0
TEAM INC COM 878155100 7 200 SH 200 0 0
TEMPLE INLAND INC COM 879868107 6 500 SH 500 0 0
TETRA TECH INC NEW COM 88162G103 23 1,000 SH 1,000 0 0
TIME WARNER INC COM 887317105 15 1,000 SH 1,000 0 0
TOMOTHERAPY INC COM 890088107 45 5,000 SH 5,000 0 0
TRACTOR SUPPLY CO COM 892356106 189 6,500 SH 6,500 0 0
TRIZETTO GROUP INC COM 896882107 279 13,043 SH 13,043 0 0
U S AIRWAYS GROUP INC COM 90341W108 2 600 SH 600 0 0
UAL CORP COM NEW 902549807 3 500 SH 500 0 0
UCBH HOLDINGS INC COM 90262T308 1 500 SH 500 0 0
UNION PAC CORP COM 907818108 189 2,500 SH PUT 2,500 0 0
VITAL IMAGES INC COM 92846N104 25 1,971 SH 1,971 0 0
W & T OFFSHORE INC COM 92922P106 23 400 SH 400 0 0
WACHOVIA CORP NEW CONV7.5%PFD CL A 929903219 441 500 SH 500 0 0
WALTER INDS INC COM 93317Q105 22 200 SH 200 0 0
WISCONSIN ENERGY CORP COM 976657106 9 200 SH 200 0 0
WONDER AUTO TECHNOLOGY INC COM 978166106 7 1,000 SH 1,000 0 0
XM SATELLITE RADIO HLDGS INC CL A 983759101 731 93,200 SH PUT 93,200 0 0
XM SATELLITE RADIO HLDGS INC CL A 983759101 731 93,200 SH 93,200 0 0
XTENT INC COM 984141101 78 31,216 SH 31,216 0 0
YAHOO INC COM 984332106 413 20,000 SH PUT 20,000 0 0
YAHOO INC COM 984332106 10 500 SH 500 0 0
YINGLI GREEN ENERGY HLDG CO ADR 98584B103 398 25,000 SH 25,000 0 0
YINGLI GREEN ENERGY HLDG CO NOTE 12/1 98584BAA1 2,348 2,750,000 PRN 2,750,000 0 0
ZORAN CORP COM 98975F101 236 20,152 SH 20,152 0 0
ZUMIEZ INC COM 989817101 4 221 SH 221 0 0

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