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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: December 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          2/11/08
-------------------------------------   -----------------   --------------------
[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:        160
Form 13F Information Table Value Total:   $106,532
                                          (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
---------------------------- --------------- --------- -------- --------- --- ---- ---------- -------- --------- ------ ----
                                                                                       
ALBANY INTL CORP             CL A            012348108      987    26,600 SH       SOLE                   26,600      0    0
ALEXION PHARMACEUTICALS INC  NOTE 1.375% 2/0 015351AF6    6,390 2,620,000 PRN      SOLE                2,620,000      0    0
ALLEGHENY ENERGY INC         COM             017361106       13       200 SH       SOLE                      200      0    0
ALLIANCE IMAGING INC         COM NEW         018606202       10     1,000 SH       SOLE                    1,000      0    0
AMERICAN MED SYS HLDGS INC   NOTE 3.250% 7/0 02744MAA6    4,098 4,150,000 PRN      SOLE                4,150,000      0    0
AMERICAN ORIENTAL BIOENGR IN COM             028731107       11     1,000 SH       SOLE                    1,000      0    0
AMIS HLDGS INC               COM             031538101        9       900 SH       SOLE                      900      0    0
AMYLIN PHARMACEUTICALS INC   NOTE 3.000% 6/1 032346AF5    2,824 3,000,000 PRN      SOLE                3,000,000      0    0
ANIXTER INTL INC             COM             035290105       12       200 SH       SOLE                      200      0    0
ANNALY CAP MGMT INC          COM             035710409       10       575 SH       SOLE                      575      0    0
ARENA RESOURCES INC          COM             040049108        8       200 SH       SOLE                      200      0    0
ASSURANT INC                 COM             04621X108       13       200 SH       SOLE                      200      0    0
AUTODESK INC                 COM             052769106       20       400 SH       SOLE                      400      0    0
BALDOR ELEC CO               COM             057741100       13       375 SH       SOLE                      375      0    0
BALLY TECHNOLOGIES INC       COM             05874B107       15       300 SH       SOLE                      300      0    0
BE AEROSPACE INC             COM             073302101       11       200 SH       SOLE                      200      0    0
BEIJING MED PHARM CORP       COM             077255107      307    28,000 SH       SOLE                   28,000      0    0
BIOMARIN PHARMACEUTICAL INC  NOTE 2.500% 3/2 09061GAC5    2,246 1,000,000 PRN      SOLE                1,000,000      0    0
BIOSCRIP INC                 COM             09069N108       12     1,500 SH       SOLE                    1,500      0    0
BJS RESTAURANTS INC          COM             09180C106        2       100 SH       SOLE                      100      0    0
BORLAND SOFTWARE CORP        COM             099849101        2       610 SH       SOLE                      610      0    0
CAI INTERNATIONAL INC        COM             12477X106      498    47,322 SH       SOLE                   47,322      0    0
CARDTRONICS INC              COM             14161H108       20     2,000 SH       SOLE                    2,000      0    0
CENTERPLATE INC              UNIT 99/99/9999 15200E204       45     5,000 SH       SOLE                    5,000      0    0
CEPHEID                      COM             15670R107       13       500 SH       SOLE                      500      0    0
CF INDS HLDGS INC            COM             125269100       17       150 SH       SOLE                      150      0    0
CHEMED CORP NEW              NOTE 1.875% 5/1 16359RAC7    1,425 1,500,000 PRN      SOLE                1,500,000      0    0
CHIPOTLE MEXICAN GRILL INC   CL B            169656204    1,231    10,000 SH       SOLE                   10,000      0    0
CIENA CORP                   NOTE 0.875% 6/1 171779AE1    2,108 2,000,000 PRN      SOLE                2,000,000      0    0
CIRRUS LOGIC INC             COM             172755100        5       957 SH       SOLE                      957      0    0
CNINSURE INC                 SPONSORED ADR   18976M103      124     7,895 SH       SOLE                    7,895      0    0
COGNIZANT TECHNOLOGY SOLUTIO CL A            192446102        3       100 SH       SOLE                      100      0    0
COGNOS INC                   COM             19244C109       12       200 SH       SOLE                      200      0    0
COMMSCOPE INC                COM             203372107        7       150 SH       SOLE                      150      0    0
CONAGRA FOODS INC            COM             205887102        8       325 SH       SOLE                      325      0    0
CONMED CORP                  NOTE 2.500%11/1 207410AD3      899 1,000,000 PRN      SOLE                1,000,000      0    0
CONSTANT CONTACT INC         COM             210313102       54     2,500 SH       SOLE                    2,500      0    0
CORE LABORATORIES LP         NOTE 0.250%10/3 21868FAB9    6,407 4,500,000 PRN      SOLE                4,500,000      0    0
CROCS INC                    COM             227046109      589    16,000 SH       SOLE                   16,000      0    0
CYPRESS SEMICONDUCTOR CORP   NOTE 1.000% 9/1 232806AK5    6,430 4,000,000 PRN      SOLE                4,000,000      0    0
DIGITAL RLTY TR INC          COM             253868103       10       250 SH       SOLE                      250      0    0
DIODES INC                   COM             254543101        8       250 SH       SOLE                      250      0    0
DIODES INC                   NOTE 2.250%10/0 254543AA9    3,442 3,350,000 PRN      SOLE                3,350,000      0    0
DISCOVERY LABORATORIES INC N COM             254668106        2     1,000 SH       SOLE                    1,000      0    0
DRESS BARN INC               NOTE 2.500%12/1 261570AB1    2,079 1,500,000 PRN      SOLE                1,500,000      0    0
EHEALTH INC                  COM             28238P109       13       400 SH       SOLE                      400      0    0
EQUINIX INC                  NOTE 3.000%10/1 29444UAG1      613   500,000 PRN      SOLE                  500,000      0    0





                                                                                       
EURONET WORLDWIDE INC        COM             298736109    1,571    52,366 SH       SOLE                   52,366      0    0
EURONET WORLDWIDE INC        DBCV 1.625%12/1 298736AD1    4,076 3,800,000 PRN      SOLE                3,800,000      0    0
FEI CO                       NOTE 2.875% 6/0 30241LAF6    1,521 1,386,000 PRN      SOLE                1,386,000      0    0
FEI CO                       NOTE        6/1 30241LAD1    3,094 3,000,000 PRN      SOLE                3,000,000      0    0
FINANCIAL FED CORP           DBCV 2.000% 4/1 317492AF3      969 1,000,000 PRN      SOLE                1,000,000      0    0
FLEXTRONICS INTL LTD         ORD             Y2573F102      427    35,400 SH       SOLE                   35,400      0    0
FOSTER WHEELER LTD           SHS NEW         G36535139       16       100 SH       SOLE                      100      0    0
FTI CONSULTING INC           COM             302941109       23       375 SH       SOLE                      375      0    0
GAMESTOP CORP NEW            CL A            36467W109        9       150 SH       SOLE                      150      0    0
GENERAL CABLE CORP DEL NEW   COM             369300108       20       275 SH       SOLE                      275      0    0
GOLDEN TELECOM INC           COM             38122G107       10       100 SH       SOLE                      100      0    0
GREATBATCH INC               COM             39153L106       86     4,300 SH       SOLE                    4,300      0    0
HALLMARK FINL SVCS INC EC    COM NEW         40624Q203        8       490 SH       SOLE                      490      0    0
HARRIS CORP DEL              COM             413875105        8       125 SH       SOLE                      125      0    0
HAYNES INTERNATIONAL INC     COM NEW         420877201       14       200 SH       SOLE                      200      0    0
HEALTH CARE REIT INC         NOTE 4.750%12/0 42217KAP1    2,271 2,150,000 PRN      SOLE                2,150,000      0    0
HERCULES TECH GROWTH CAP INC COM             427096508        5       400 SH       SOLE                      400      0    0
HHGREGG INC                  COM             42833L108       69     5,000 SH       SOLE                    5,000      0    0
HORNBECK OFFSHORE SVCS INC N COM             440543106        9       200 SH       SOLE                      200      0    0
HURON CONSULTING GROUP INC   COM             447462102       10       125 SH       SOLE                      125      0    0
ICONIX BRAND GROUP INC       NOTE 1.875% 6/3 451055AB3    1,930 2,000,000 PRN      SOLE                2,000,000      0    0
IHS INC                      CL A            451734107       51       843 SH       SOLE                      843      0    0
INTELLON CORP                COM             45816W504        1       100 SH       SOLE                      100      0    0
INVERNESS MED INNOVATIONS IN COM             46126P106       11       200 SH       SOLE                      200      0    0
INVESCO LTD                  SHS             G491BT108        9       300 SH       SOLE                      300      0    0
ISHARES TR                   DJ US TECH SEC  464287721       12       200 SH       SOLE                      200      0    0
ITC HLDGS CORP               COM             465685105       17       300 SH       SOLE                      300      0    0
JACK IN THE BOX INC          COM             466367109        8       325 SH       SOLE                      325      0    0
JONES LANG LASALLE INC       COM             48020Q107       14       200 SH       SOLE                      200      0    0
KULICKE & SOFFA INDS INC     NOTE 0.875% 6/0 501242AT8    1,548 2,000,000 PRN      SOLE                2,000,000      0    0
LASALLE HOTEL PPTYS          COM SH BEN INT  517942108       67     2,100 SH       SOLE                    2,100      0    0
LAWSON SOFTWARE INC NEW      NOTE 2.500% 4/1 52078PAA0    3,061 2,770,000 PRN      SOLE                2,770,000      0    0
LAZARD LTD                   SHS A           G54050102       14       350 SH       SOLE                      350      0    0
LIMELIGHT NETWORKS INC       COM             53261M104        6       800 SH       SOLE                      800      0    0
LUMBER LIQUIDATORS INC       COM             55003Q103       45     5,000 SH       SOLE                    5,000      0    0
MACROVISION CORP             COM             555904101      227    12,400 SH       SOLE                   12,400      0    0
MACROVISION CORP             NOTE 2.625% 8/1 555904AB7    3,299 3,500,000 PRN      SOLE                3,500,000      0    0
MAGELLAN MIDSTREAM HLDGS LP  COM LP INTS     55907R108       13       500 SH       SOLE                      500      0    0
MAGMA DESIGN AUTOMATION      NOTE 2.000% 5/1 559181AC6    2,163 2,150,000 PRN      SOLE                2,150,000      0    0
MANITOWOC INC                COM             563571108       12       250 SH       SOLE                      250      0    0
MANNKIND CORP                COM             56400P201       80    10,000 SH       SOLE                   10,000      0    0
MATHSTAR INC                 COM             576801203       55    85,134 SH       SOLE                   85,134      0    0
MB FINANCIAL INC NEW         COM             55264U108       21       689 SH       SOLE                      689      0    0
MCCORMICK & SCHMICKS SEAFD R COM             579793100      397    33,300 SH       SOLE                   33,300      0    0
MCG CAPITAL CORP             COM             58047P107        1       100 SH       SOLE                      100      0    0
MDS INC                      COM             55269P302       33     1,700 SH       SOLE                    1,700      0    0
MERGE TECHNOLOGIES INC       COM             589981109       18    15,000 SH       SOLE                   15,000      0    0
METABOLIX INC                COM             591018809      179     7,500 SH       SOLE                    7,500      0    0
MICREL INC                   COM             594793101      173    20,444 SH       SOLE                   20,444      0    0
MICROSOFT CORP               COM             594918104        4       100 SH       SOLE                      100      0    0
MSC INDL DIRECT INC          CL A            553530106        9       225 SH       SOLE                      225      0    0
NAVTEQ CORP                  COM             63936L100       45       600 SH       SOLE                      600      0    0





                                                                                       
NEW ORIENTAL ED & TECH GRP I SPON ADR        647581107       16       200 SH       SOLE                      200      0    0
NEW YORK & CO INC            COM             649295102      239    37,500 SH       SOLE                   37,500      0    0
NMS COMMUNICATIONS CORP      COM             629248105       97    60,000 SH       SOLE                   60,000      0    0
NOBLE CORPORATION            SHS             G65422100       27       475 SH       SOLE                      475      0    0
NYSE EURONEXT                COM             629491101    4,866    55,440 SH       SOLE                   55,440      0    0
OCWEN FINL CORP              COM NEW         675746309       22     4,000 SH  PUT  SOLE                    4,000      0    0
OCWEN FINL CORP              NOTE 3.250% 8/0 675746AD3    1,490 2,000,000 PRN      SOLE                2,000,000      0    0
ON SEMICONDUCTOR CORP        NOTE        4/1 682189AE5    2,725 2,500,000 PRN      SOLE                2,500,000      0    0
ONYX PHARMACEUTICALS INC     COM             683399109       11       200 SH       SOLE                      200      0    0
OPEN TEXT CORP               COM             683715106       13       400 SH       SOLE                      400      0    0
ORACLE CORP                  COM             68389X105        7       300 SH       SOLE                      300      0    0
OSCIENT PHARMACEUTICALS CORP NOTE 3.500% 4/1 68812RAC9       40   100,000 PRN      SOLE                  100,000      0    0
OSI PHARMACEUTICALS INC      NOTE 2.000%12/1 671040AF0    5,631 3,250,000 PRN      SOLE                3,250,000      0    0
PACIFIC SUNWEAR CALIF INC    COM             694873100        1        82 SH       SOLE                       82      0    0
PACKAGING CORP AMER          COM             695156109       13       475 SH       SOLE                      475      0    0
PANTRY INC                   COM             698657103       24       900 SH       SOLE                      900      0    0
PEDIATRIX MED GROUP          COM             705324101       14       200 SH       SOLE                      200      0    0
PERRIGO CO                   COM             714290103       11       300 SH       SOLE                      300      0    0
PETROHAWK ENERGY CORP        COM             716495106       15       875 SH       SOLE                      875      0    0
PHARMION CORP                COM             71715B409       13       200 SH       SOLE                      200      0    0
PHILADELPHIA CONS HLDG CORP  COM             717528103        8       200 SH       SOLE                      200      0    0
PHILLIPS VAN HEUSEN CORP     COM             718592108        7       200 SH       SOLE                      200      0    0
POWERWAVE TECHNOLOGIES INC   COM             739363109       66    16,447 SH       SOLE                   16,447      0    0
PRECISION CASTPARTS CORP     COM             740189105       21       150 SH       SOLE                      150      0    0
PROSHARES TR                 ULTRASHT SP500  74347R883      433     8,000 SH       SOLE                    8,000      0    0
PROTEIN DESIGN LABS INC      NOTE 2.000% 2/1 74369LAF0    1,940 2,000,000 PRN      SOLE                2,000,000      0    0
RADIATION THERAPY SVCS INC   COM             750323206      773    25,000 SH       SOLE                   25,000      0    0
RANDGOLD RES LTD             ADR             752344309       11       300 SH       SOLE                      300      0    0
RANGE RES CORP               COM             75281A109        9       175 SH       SOLE                      175      0    0
RED ROBIN GOURMET BURGERS IN COM             75689M101       26       800 SH       SOLE                      800      0    0
REPUBLIC AWYS HLDGS INC      COM             760276105       22     1,100 SH       SOLE                    1,100      0    0
RESPIRONICS INC              COM             761230101       13       200 SH       SOLE                      200      0    0
RF MICRODEVICES INC          COM             749941100       38     6,700 SH       SOLE                    6,700      0    0
RICKS CABARET INTL INC       COM NEW         765641303       11       400 SH       SOLE                      400      0    0
RUBIOS RESTAURANTS INC       COM             78116B102        1       100 SH       SOLE                      100      0    0
RUTHS CHRIS STEAK HSE INC    COM             783332109        1       100 SH       SOLE                      100      0    0
SAKS INC                     COM             79377W108      115     5,525 SH       SOLE                    5,525      0    0
SANGAMO BIOSCIENCES INC      COM             800677106       17     1,300 SH       SOLE                    1,300      0    0
SCIELE PHARMA INC            NOTE 2.625% 5/1 808627AA1    1,715 1,759,000 PRN      SOLE                1,759,000      0    0
SEABRIGHT INSURANCE HLDGS IN COM             811656107        3       200 SH       SOLE                      200      0    0
SEQUENOM INC                 COM NEW         817337405       12     1,300 SH       SOLE                    1,300      0    0
SHORETEL INC                 COM             825211105        8       600 SH       SOLE                      600      0    0
SKYWORKS SOLUTIONS INC       COM             83088M102       91    10,700 SH       SOLE                   10,700      0    0
SKYWORKS SOLUTIONS INC       NOTE 1.500% 3/0 83088MAH5      331   300,000 PRN      SOLE                  300,000      0    0
SONIC INNOVATIONS INC        COM             83545M109      215    27,912 SH       SOLE                   27,912      0    0
SOTHEBYS                     COM             835898107       19       500 SH       SOLE                      500      0    0
SPRINT NEXTEL CORP           COM SER 1       852061100      133    10,165 SH       SOLE                   10,165      0    0
SRS LABS INC                 COM             78464M106       95    17,749 SH       SOLE                   17,749      0    0
SUNSTONE HOTEL INVS INC NEW  COM             867892101        9       500 SH       SOLE                      500      0    0
TECHWELL INC                 COM             87874D101        1       105 SH       SOLE                      105      0    0
TELLABS INC                  COM             879664100      134    20,529 SH       SOLE                   20,529      0    0
THOMAS & BETTS CORP          COM             884315102       12       250 SH       SOLE                      250      0    0





                                                                                       
TRICO MARINE SERVICES INC    NOTE 3.000% 1/1 896106AQ4    3,789 3,500,000 PRN      SOLE                3,500,000      0    0
TRIZETTO GROUP INC           NOTE 2.750%10/0 896882AB3    5,001 4,500,000 PRN      SOLE                4,500,000      0    0
ULTRALIFE BATTERIES INC      COM             903899102       12       600 SH       SOLE                      600      0    0
UNITED STATES OIL FUND LP    UNITS           91232N108       15       200 SH       SOLE                      200      0    0
VIROPHARMA INC               COM             928241108        1       100 SH       SOLE                      100      0    0
VITAL SIGNS INC              COM             928469105        1        16 SH       SOLE                       16      0    0
VOLTERRA SEMICONDUCTOR CORP  COM             928708106       88     7,964 SH       SOLE                    7,964      0    0
WISCONSIN ENERGY CORP        COM             976657106        9       175 SH       SOLE                      175      0    0
YAHOO INC                    FRNT        4/0 984332AB2    5,237 4,500,000 PRN      SOLE                4,500,000      0    0