13F-HR 1 efc7-0556_dc916033form13fhr.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: December 29, 2006 ----------------- 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: Magnetar Financial LLC Address: 1603 Orrington Avenue 13th Floor Evanston, IL 60201 Form 13F File Number: 028-11800 --------------- 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: Michael Turro Title: Chief Compliance Officer Phone: 847-905-4690 Signature, Place and Date of Signing: /s/ Michael Turro Evanston IL February 14, 2007 ---------------------------------- ------------ ----------------- [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: 252 -------------------------- Form 13F Information Table Value Total: $2,666,213 -------------------------- (in 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
MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 ----------------------------------------------------------------------------------------------------------------------------------- CLASS VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY ----- ----- ------- --- ---- ---------- ----- ---------------- NAME OF ISSUER TITLE CUSIP (X$1,000) PRN AMT PRN CALL DISCRETION MANAGERS SOLE SHARED NONE -------------- ----- ----- --------- ------- --- ---- ---------- -------- ---- ------ ---- ----------------------------------------------------------------------------------------------------------------------------------- ACCESS INTEGRATED CL A 004329108 $4,999 573,266 SH SOLE 573,266 ACERGY S A SPONSORED 00443E104 $4,121 213,975 SH SOLE 213,975 ADR ACQUIROR TECHNOLOGY COM 00489A107 $124 22,000 SH SOLE 22,000 ACQUIROR TECHNOLOGY *W EXP 00489A115 $249 300,000 SH SOLE 300,000 03/15/201 ADMINISTAFF INC COM 007094105 $2,070 48,388 SH SOLE 48,388 AEGEAN MARINE PETROLE SHS Y0017S102 $6,560 400,000 SH SOLE 400,000 AFC ENTERPRISES INC COM 00104Q107 $884 50,000 SH SOLE 50,000 AFFILIATED MGRS GP COM 008252108 $4,459 42,411 SH SOLE 42,411 AK STL HLDG CORP COM 001547108 $29,080 1,720,700 SH CALL SOLE 1,720,700 ALEXION PHARMACEUTIC COM 015351109 $3,220 79,726 SH SOLE 79,726 ALKERMES INC COM 01642T108 $2,562 191,647 SH SOLE 191,647 ALKERMES INC COM 01642T108 $1,337 100,000 SH CALL SOLE 100,000 ALLOY INC NEW COM 019855303 $5,889 511,624 SH SOLE 511,624 ALLTEL CORP COM 020039103 $6,048 100,000 SH SOLE 100,000 AMERISTAR CASINOS INC COM 03070Q101 $845 27,500 SH CALL SOLE 27,500 AMGEN INC COM 031162100 $6,659 97,477 SH SOLE 97,477 AMGEN INC COM 031162100 $10,247 150,000 SH PUT SOLE 150,000 AMICAS INC COM 001712108 $2,896 985,084 SH SOLE 985,084 ANHEUSER BUSCH COS COM 035229103 $9,373 190,500 SH SOLE 190,500 ANSWERTHINK INC COM 036916104 $2,323 754,325 SH SOLE 754,325 ARCH CHEMICALS INC COM 03937R102 $666 20,000 SH SOLE 20,000 ASCENDIA BRANDS INC COM 043509108 $1,271 502,200 SH SOLE 502,200 ASHWORTH INC COM 04516H101 $1,928 265,610 SH SOLE 265,610 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 ASPREVA PHARMACEUTIC COM 04538T109 $5,795 282,425 SH SOLE 282,425 AT&T INC COM 00206R102 $11,840 331,200 SH PUT SOLE 331,200 ATHEROGENTICS INC COM 047439104 $3,964 400,000 SH CALL SOLE 400,000 ATLANTIC TELE NETWORK COM NEW 049079205 $1,647 56,213 SH SOLE 56,213 ATLAS AMER INC COM 049167109 $91,179 1,788,884 SH SOLE 1,788,884 AVON PRODS INC COM 054303102 $1,543 46,700 SH SOLE 46,700 BALDWIN TECHNOLOGY CL A 058264102 $50 10,000 SH SOLE 10,000 BARRIER THERAPEUTICS COM 06850R108 $5,484 727,384 SH SOLE 727,384 BASIN WTR INC COM 07011T306 $6,389 943,702 SH SOLE 943,702 BEACON ROOFING SUPPLY COM 073685109 $5,352 284,390 SH SOLE 284,390 BEST BUY INC COM 086516101 $3,561 72,400 SH SOLE 72,400 BORDERS GROUP INC COM 099709107 $17,250 771,800 SH SOLE 771,800 BOSTON PPTYS LTD NOTE 3.75% 10112RAG9 $5,820 5,000,000 PRN SOLE 5,000,000 5/1 BROOKFIELD PPTYS CORP COM 112900105 $25,958 660,000 SH SOLE 660,000 CADENCE DESIGN SYSTEM NOTE 8/1 127387AB4 $16,044 13,500,000 PRN SOLE NONE CARIBOU COFFEE INC COM 142042209 $1,475 172,886 SH SOLE 172,886 CBRE REALTY FINANCE COM 12498B307 $3,928 250,000 SH SOLE 250,000 CEC ENTMT INC COM 125137109 $325 8,083 SH SOLE 8,083 CENTER FINL CORP CALIF COM 15146E102 $1,433 59,770 SH SOLE 59,770 CEPHALON INC NOTE 156708AP4 $19,764 12,000,000 PRN SOLE NONE 2.000% 6/0 CHEMTURA CORP COM 163893100 $1,660 172,336 SH SOLE 172,336 CHESAPEAKE ENERGY NOTE 165167BW6 $5,081 5,000,000 PRN SOLE NONE 2.750% 11/1 CHIPOTLE MEXICAN GRILL CL A 169656105 $1,283 22,500 SH PUT SOLE 22,500 COGENT INC COM 19239Y108 $683 62,064 SH SOLE 62,064 COLD SPRING CAP INC COM 192865103 $4,088 750,000 SH SOLE 750,000 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 COLD SPRING CAP INC *W EXP 192865111 $360 1,500,000 SH SOLE 1,500,000 11/11/200 COLDWATER CREEK INC COM 193068103 $1,704 69,488 SH SOLE 69,488 COMMERICAL VEH GROUP COM 202608105 $872 40,000 SH SOLE 40,000 COMPLETE PRODUCTION COM 20453e109 $9,221 434,974 SH SOLE 434,974 CONOR MEDSYSTEMS INC COM 208264101 $1,410 45,000 SH SOLE 45,000 CONOR MEDSYSTEMS INC COM 208264101 $9,628 307,300 SH CALL SOLE 307,300 COOPER TIRE & RUBR CO COM 216831107 $429 30,000 SH SOLE 30,000 COPA HOLDINGS SA CL A P31076105 $4,306 92,486 SH SOLE 92,486 CYCLACEL PHARMACEUTI COM 23254l108 $4,052 590,676 SH SOLE 590,676 CYPRESS BIOSCIENCES COM PAR 232674507 $199 25,627 SH SOLE 25,627 $.02 D R HORTON COM 23331A109 $2,225 84,000 SH SOLE 84,000 DADE BEHRING HLDGS COM 23342J206 $74,208 1,864,064 SH SOLE 1,864,064 DISNEY WALT CO COM DISNEY 254687106 $6,607 192,800 SH SOLE 192,800 DOLLAR GEN CORP COM 256669102 $512 31,900 SH SOLE 31,900 DYNVAX TECHNOLOGIES COM 268158102 $1,882 205,000 SH SOLE 205,000 EXELIXIS INC COM 30161Q104 $698 77,608 SH SOLE 77,608 FALCONSTOR SOFTWARE COM 306137100 $6,626 766,014 SH SOLE 766,014 FINANCIAL FED CORP DBCV 317492AF3 $10,506 9,500,000 PRN SOLE NONE 2.000% 4/1 FIRST ADVANTAGE CORP CL A 31845F100 $7,972 347,218 SH SOLE 347,218 FIRST DATA CORP COM 319963104 $20,416 800,000 SH SOLE 800,000 FLOWSERVE CORP COM 34354P105 $62,269 1,233,786 SH SOLE 1,233,786 FORD MTR CO DEL NOTE 345370CF5 $133,786 125,000,000PRN SOLE NONE 4.250% 12/1 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 FOREST OIL CORP COM PAR 346091705 $3,842 117,570 SH SOLE 117,570 $0.01 GASTAR EXPL LTD COM 367299104 $1,210 563,005 SH SOLE 563,005 GAYLORD ENTMT CO NEW COM 367905106 $1,019 20,000 SH SOLE 20,000 GENESIS LEASE LTD ADR 37183T107 $8,225 350,000 SH SOLE 350,000 GILEAD SCIENCES INC COM 375558103 $3,284 50,577 SH SOLE 50,577 GILDAN ACTIVEWEAR INC COM 375916103 $2,075 44,500 SH SOLE 44,500 GLOBALSANTAFE CORP SHS G3930E101 $9,307 158,332 SH SOLE 158,332 GLOBALSANTAFE CORP SHS G3930E101 $17,634 300,000 SH PUT SOLE 300,000 GOODMAN GLOBAL INC COM 38239A100 $627 36,465 SH SOLE 36,465 HANA BIOSCIENCES INC COM 40963P105 $4,064 722,727 SH SOLE 722,727 HANESBRANDS INC COM 410345102 $20,374 862,566 SH SOLE 862,566 HAWK CORP CL A 420089104 $1,820 152,058 SH SOLE 152,058 HEALTH GRADES INC COM 42218Q102 $7,263 1,617,494 SH SOLE 1,617,494 HEALTHEXTRAS INC COM 422211102 $6,015 249,605 SH SOLE 249,605 HEALTHWAYS INC COM 422245100 $2,079 43,574 SH SOLE 43,574 HEINZ H J CO COM 423074103 $675 15,000 SH SOLE 15,000 HERCULES TECH GROWTH COM 427096508 $5,592 392,387 SH SOLE 392,387 HITTITE MICROWAVE COM 433665Y104 $6,528 201,977 SH SOLE 201,977 HOME DIAGNOSTICS INC COM 437080104 $3,237 305,345 SH SOLE 305,345 HORIZON LINES INC COM 44044K101 $25,454 944,126 SH SOLE 944,126 HORNBECK OFFSHORE COM 440543106 $4,487 125,700 SH SOLE 125,700 HYTHIAM INC COM 44919F104 $5,986 647,792 SH SOLE 647,792 ICON PUB LTD CO SPONSORED 45103T107 $8,334 221,051 SH SOLE 221,051 ADR INFINITY PHARMACEUTIC COM 45665G303 $553 44,411 SH SOLE 44,411 INNERWORKINGS INC COM 45773Y105 $383 23,985 SH SOLE 23,985 INSTEEL INDUSTRIES INC COM 45774W108 $890 50,000 SH SOLE 50,000 INTRALASE CORP COM 461169104 $10,292 459,875 SH SOLE 459,875 INVESTMENT TECH GROUP COM 46145F105 $4,925 114,847 SH SOLE 114,847 IPC HLDGS LTD ORD G4933P101 $2,355 74,875 SH SOLE 74,875 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 ISHARES TR DJ US FINL 464287788 $41,237 350,000 SH SOLE 350,000 SEC ISHARES TR RUSSELL 464287655 $140,634 1,800,000 SH PUT 1,800,000 2000 IXYS CORP COM 46600W106 $1,335 150,000 SH SOLE 150,000 JAMBA INC COM 47023A101 $21,105 2,095,783 SH SOLE 2,095,783 JARDEN CORP COM 471109108 $9,343 268,542 SH SOLE 268,542 JDA SOFTWARE GROUP COM 46612K108 $513 37,286 SH SOLE 37,286 KAMAN CORP COM 483548103 $2,635 117,703 SH SOLE 117,703 KANBAY INTL INC COM 48369P207 $41,425 1,439,881 SH SOLE 1,439,881 KERYX BIOPHARMACEUTI COM 492515101 $5,363 403,215 SH SOLE 403,215 KINTERA INC COM 49720P506 $4,055 3,347,337 SH SOLE 3,347,337 KOHLBERG CAPITAL CORP COM 500233101 $4,325 250,000 SH SOLE 250,000 KRISPY KREME COM 501014104 $17,201 1,549,634 SH SOLE 1,549,634 LAUDER ESTEE COS INC CL A 518439104 $1,494 36,600 SH SOLE 36,600 LENNAR CORP CL A 526057104 $839 16,000 SH SOLE 16,000 LENOX GROUP INC COM 52626100 $999 156,016 SH SOLE 156,016 LIFECELL CORP COM 531927101 $4,828 200,000 SH CALL SOLE 200,000 LIONS GATE ENTMNT COM NEW 535919203 $333 31,019 SH SOLE 31,019 LINN ENERGY LLC UNIT 536020100 $10,590 362,930 SH SOLE 362,930 99/99/9999 LIONBRIDGE TECHNOLOGI COM 536252109 $4,259 661,382 SH SOLE 661,382 LUNA INNOVATIONS COM 550351100 $819 233,408 SH SOLE 233,408 MACQUARIE INFRASTRUC SH BEN INT 55607X108 $7,327 206,500 SH SOLE 206,500 MARINEMAX INC COM 567908108 $975 37,600 SH SOLE 37,600 MARLIN BUSINESS SVCS COM 571157106 $3,605 150,000 SH SOLE 150,000 MATERIAL SCIENCES COM 576674105 $712 55,000 SH SOLE 55,000 MATRIA HEALTHCARE COM NEW 576817209 $11,812 411,146 SH SOLE 411,146 MAX RE CAPITAL LTD HA SHS G6052F103 $4,468 180,000 SH SOLE 180,000 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 MCCORMICK & CO INC COM NON VTG 579780206 $3,455 89,600 SH SOLE 89,600 MEDIMMUNE INC COM 584699102 $3,530 109,038 SH SOLE 109,038 MEDTRONIC INC COM 585055106 $1,351 25,242 SH SOLE 25,242 MEDTRONIC INC NOTE 585055am8 $7,990 7,500,000 PRN SOLE NONE 1.625% 4/1 MENTOR CORP MINN COM 587188103 $1,306 26,716 SH SOLE 26,716 MICROSEMI CORP COM 595137100 $9,163 466,286 SH SOLE 466,286 MIDAS GROUP INC COM 595626102 $1,380 60,000 SH SOLE 60,000 MOLDFLOW CORP COM 608507109 $930 66,954 SH SOLE 66,954 MULTIMEDIA GAMES INC COM 625453105 $2,832 294,984 SH SOLE 294,984 NATIONAL FINL PARTNER COM 63607p208 $5,852 133,084 SH SOLE 133,084 NAVIGATORS GROUP INC COM 638904102 $1,120 23,249 SH SOLE 23,249 NCI BUILDING SYS INCE COM 628852105 $4,140 80,000 SH SOLE 80,000 NEW YORK TIMES CO CL A 650111107 $2,056 84,400 SH SOLE 84,400 NEXTEST SYS CORP COM 653339101 $7,504 665,803 SH SOLE 665,803 NRG ENERGY INC COM NEW 629377508 $84,149 1,502,391 SH SOLE 1,502,391 NRG ENERGY INC COM NEW 629377958 $28,005 500,000 SH SOLE 500,000 99 CENTS ONLY STORES COM 65440K106 $495 40,700 SH SOLE 40,700 NOBLE CORPORATION SHS G65422100 $10,771 141,444 SH SOLE 141,444 NOBLE CORPORATION SHS G65422100 $19,038 250,000 SH PUT SOLE 250,000 NTELOS HLDGS CORP COM 67020Q107 $3,089 172,746 SH SOLE 172,746 NUANCE COMMUNICATIO COM 67020Y100 $4,176 364,361 SH SOLE 364,361 OIL SVC HOLDRS TR DEPOSTRY 678002106 $125,811 900,000 SH SOLE 900,000 RCPT ON ASSIGNMENT INC COM 682159108 $7,415 631,053 SH SOLE 631,053 OPEN SOLUTIONS INC COM 68371P102 $22,584 600,000 SH SOLE 600,000 OPEXA THERAPEUTICS COM 68372t103 $4,057 668,315 SH SOLE 668,315 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 OPTIMAL GROUP INC CL A NEW 68388R208 $7,807 820,045 SH SOLE 820,045 OPTION CARE INC COM 683948103 $10,466 734,447 SH SOLE 734,447 OPTIONSXPRESS HLDGS COM 684010101 $2,411 106,244 SH SOLE 106,244 ORIENT-EXPRESS HOTELS CL A G67743107 $497 10,500 SH SOLE 10,500 ORTHOVITA INC COM 68750U102 $16,044 4,419,868 SH SOLE 4,419,868 OSI PHARMACEUTICALS COM 671040103 $2,260 64,618 SH SOLE 64,618 P F CHANGS CHINA BISTRO COM 69333Y108 $2,341 61,000 SH SOLE 61,000 PANACOS PHARMACEUTIC COM 69811Q106 $802 200,000 SH SOLE 200,000 PAYLESS SHOESOURCE COM 704379106 $3,915 119,300 SH SOLE 119,300 PENN NATL GAMING INC COM 707569109 $4,430 106,447 SH SOLE 106,447 PENN VA CORP COM 707882106 $47,085 672,264 SH SOLE 672,264 PENNY J C INC COM 708160106 $1,988 25,000 SH SOLE 25,000 PEOPLESUPPORT INC COM 712714302 $1,126 53,496 SH SOLE 53,496 PHILADELPHIA CONS HLD COM 717528103 $1,067 23,942 SH SOLE 23,942 PHYSICIANS FORMULA COM 719427106 3,423 183,132 SH SOLE 183,132 PICO HLDGS INC COM NEW 693366205 $4,012 115,400 SH SOLE 115,400 PIONEER COS INC COM NEW 723643300 $2,471 86,235 SH SOLE 86,235 PLAYBOY ENTERPRISES CL B 728117300 $868 75,773 SH SOLE 75,773 PLEXUS CORP COM 729132100 $4,041 169,238 SH SOLE 169,238 POWER-ONE INC COM 739308104 $5,855 804,293 SH SOLE 804,293 PRIDE INTL INC DEL COM 74153Q102 $15,755 525,000 SH SOLE 525,000 PRIDE INTL INC DEL COM 74153Q102 $30,010 1,000,000 SH PUT SOLE 1,000,000 PROCTER & GAMBLE CO COM 742718109 $4,743 73,800 SH SOLE 73,800 PROTEIN DESIGN LABS INC NOTE 74369LAF0 $5,250 5,000,000 PRN SOLE NONE 2.000% 2/1 PSS WORLD MED INC COM 69366A100 $1,074 55,000 SH SOLE 55,000 PSYCHIATRIC SOLUTIONS COM 74439H108 $4,214 112,320 SH SOLE 112,320 QUALCOMM INC COM 747525103 $7,558 200,000 SH SOLE 200,000 QUICKSILVER RESOURCES COM 74837R104 $567 15,503 SH SOLE 15,503 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 RACKABLE SYS INC COM 750077109 $2,141 69,137 SH SOLE 69,137 RAM ENERGY RESOURCES *W EXP 75130P117 $199 231,000 SH SOLE 231,000 99/99/999 RC2 CORP COM 749388104 $660 15,000 SH SOLE 15,000 REALOGY CORP COM 75605E100 $33,352 1,100,000 SH SOLE 1,100,000 RED ROBIN GOURMET BUR COM 75689M101 $33,989 948,090 SH SOLE 948,090 REDWOOD TR INC COM 758075402 $2,768 47,660 SH SOLE 47,660 RESTORE MEDICAL INC COM 76128C100 $3,400 807,562 SH SOLE 807,562 REVLON INC CL A 761525500 $893 697,964 SH SOLE 697,964 RITE AID CORP COM 767754104 $495 91,009 SH SOLE 91,009 RLI CORP COM 749607107 $2,500 44,309 SH SOLE 44,309 RUBIOS RESTAURANTS IN COM 78116B102 $2,376 241,173 SH SOLE 241,173 RUDOLPH TECHNOLOGIES COM 781270103 $951 59,758 SH SOLE 59,758 RYERSON INC COM 78375P107 $30,108 1,200,000 SH SOLE 1,200,000 RYLAND GROUP INC COM 783764103 $205 3,750 SH SOLE 3,750 SANTARUS INC COM 802817304 $1,748 223,298 SH SOLE 223,298 SCIENTIFIC GAMES CORP CL A 80874P109 $15,404 509,549 SH SOLE 509,549 SEARS HLDGS CORP COM 812350106 $1,478 8,800 SH SOLE 8,800 SEASPAN CORP SHS Y75638109 $11,560 500,000 SH SOLE 500,000 SELECT SECTOR SPDR TR SBI INT- 81369Y506 $29,315 500,000 SH PUT SOLE 500,000 ENERGY SILICON LABORATORIES COM 826919102 $8,663 250,000 SH CALL SOLE 250,000 SIX FLAGS INC COM 83001P109 $6,288 1,200,000 SH SOLE 1,200,000 SIX FLAGS INC COM 83001P109 $11,666 2,226,300 SH CALL SOLE 2,226,300 SIX FLAGS INC COM 83001P109 $6,288 1,200,000 SH PUT SOLE 1,200,000 SPECIALTY UNDERWRITER COM 84751T309 $392 46,626 SH SOLE 46,626 STATION CASINOS INC COM 857689103 $32,668 400,000 SH SOLE 400,000 STREETTRACKS GOLD TR GOLD SHS 863307104 $2,083 33,000 SH SOLE 33,000 SUNAIR SERVICES CORP COM 867017105 $962 259,900 SH SOLE 259,900 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 SYMBOL TECHNOLOGIES COM 871508107 $46,620 3,120,494 SH SOLE 3,120,494 TEKTRONIX INC COM 879131100 $1,896 65,000 SH SOLE 65,000 TENNANT CO COM 880345103 $1,230 42,403 SH SOLE 42,403 THINK PARTNERSHIP INC COM 88409N101 $15,654 4,801,896 SH SOLE 4,801,896 TIME WARNER TELECOM DBCV 887319AC5 $15,726 12,500,000 PRN SOLE NONE 2.375% 4/0 TLC VISION CORP COM 872549100 $3,764 719,717 SH SOLE 719,717 TOLL BROTHERS INC COM 889478103 $902 28,000 SH SOLE 28,000 TOWN SPORTS INTL HLDG COM 89214A102 $3,586 217,576 SH SOLE 217,576 TRANSOCEAN ORD G90078109 $20,223 250,000 SH PUT SOLE 250,000 TRANSOCEAN INC ORD G90078109 $10,997 135,944 SH SOLE 135,944 TRONOX INC COM CL B 897051207 $17,666 1,118,800 SH SOLE 1,118,800 TYSON FOODS INC CL A 902494103 $1,202 73,100 SH SOLE 73,100 URS CORP NEW COM 903236107 $1,714 40,000 SH SOLE 40,000 U S G CORP COM NEW 903293405 $32,880 600,000 SH SOLE 600,000 U S G CORP COM NEW 903293405 $54,800 1,000,000 SH PUT SOLE 1,000,000 UAP HLDG CORP COM 903441103 $3,525 140,000 SH SOLE 140,000 ULTIMATE SOFTWARE GR COM 90385D107 $5,502 236,560 SH SOLE 236,560 ULTRA CLEAN HLDGS INC COM 90385V107 $4,865 393,941 SH SOLE 393,941 UNITED AMER INDEMNITY CL A 90933T109 $3,885 153,363 SH SOLE 153,363 UNITED PANAM FINANCIA COM 911301109 $3,283 238,556 SH SOLE 238,556 UNITED WESTN BANCORP COM 913201109 $5,716 285,919 SH SOLE 285,919 UNIVERSAL AMERN FINL COM 913377107 $41,951 2,250,598 SH SOLE 2,250,598 UNIVERSAL COMPRESSION COM 913431102 $128,165 2,063,528 SH SOLE 2,063,528 US BIOENERGY CORP COM 90342V109 $2,125 125,000 SH SOLE 125,000 USI HLDGS CORP COM 90333H101 $2,001 130,280 SH SOLE 130,280 VALERO ENERGY CORP COM 91913Y100 $33,510 655,000 SH SOLE 655,000 VALERO ENERGY CORP COM 91913Y100 $51,160 1,000,000 SH PUT SOLE 1,000,000 MAGNETAR FINANCIAL LLC FORM 13F Quarter Ended December 29, 2006 VALUEVISION MEDIA INC CL A 92047K107 $5,673 431,720 SH SOLE 431,720 VCA ANTECH INC COM 918194101 $3,058 95,012 SH SOLE 95,012 VENOCO INC COM 92275P307 $24,584 1,400,000 SH SOLE 1,400,000 VERASUN ENERGY CORP COM 92336G106 $5,105 258,483 SH SOLE 258,483 VERTEX PHARMACEUTICA COM 92532F100 $2,756 73,644 SH SOLE 73,644 VERTEX PHARMACEUTICA COM 92532F100 $3,742 100,000 SH PUT SOLE 100,000 VISTAPRINT LIMITED SHS G93762204 $7,077 213,729 SH SOLE 213,729 VOCUS INC COM 92858J108 $5,192 309,055 SH SOLE 309,055 VOLCANO CORPORATION COM 928645100 $14,556 888,129 SH SOLE 888,129 WATTS WATER TECHNOLO CL A 942749102 $2,672 65,000 SH SOLE 65,000 WEB COM INC COM NEW 94732Q100 $122 29,053 SH SOLE 29,053 WEBSIDESTORY INC COM 947685103 $4,531 357,911 SH SOLE 357,911 WEBSITE PROS INC COM 94769V105 $5,052 558,227 SH SOLE 558,227 WET SEAL INC CL A 961840105 $3,401 509,929 SH SOLE 509,929 WEYERHAEUSER CO COM 962166104 $28,260 400,000 SH SOLE 400,000 WINTRUST FINANCIAL COM 97650W108 $7,232 150,601 SH SOLE 150,601 WORKSTREAM INC COM 981402100 $3,720 3,321,634 SH SOLE 3,321,634 XENOPORT INC COM 98411C100 $1,171 47,701 SH SOLE 47,701 XETHANOL CORP COM 98420A103 $1,705 888,889 SH SOLE 888,889 YOUBET COM INC COM 987413101 $5,171 1,401,348 SH SOLE 1,401,348