13F-HR 1 form13fhr.txt ARDSLEY ADVISORY PARTNERS 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, 2005 ----------------------- 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: Ardsley Advisory Partners -------------------------------------------------- Address: 262 Harbor Drive, 4th Floor -------------------------------------------------- Stamford, CT 06902 -------------------------------------------------- -------------------------------------------------- Form 13F File Number: 28-04639 ------------------ 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: Steven Napoli -------------------------------------------------- Title: Partner -------------------------------------------------- Phone: 203-564-4230 -------------------------------------------------- Signature, Place, and Date of Signing: /s/ Steven Napoli Stamford, CT 02/8/06 ------------------------ --------------------------- --------- [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).) List of Other Managers Reporting for this Manager: none Form 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 ------------- Form 13F Information Table Entry Total: 50 ------------- Form 13F Information Table Value Total: $861,647 ------------- (thousands) List of Other Included Managers: none 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.
Form 13F INFORMATION TABLE COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 --------------------------------- -------------- --------- -------- ----------------- ---------- -------- ------------------------- VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGERS SOLE SHARED NONE --------------------------------- -------------- --------- -------- -------- --- ---- ---------- -------- -------- -------- ------ ADOBE SYSTEMS INC COM 00724F101 16,632 450,000(SH) (SOLE) 450,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- AETNA INC NEW COM 00817Y108 28,293 300,000(SH) (SOLE) 300,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- ATWOOD OCEANICS INC COM 050095108 8,739 112,000(SH) (SOLE) 112,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- BAKER HUGHES INC COM 057224107 9,117 150,000(SH) (SOLE) 150,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- BEARINGPOINT INC COM 074002106 4,716 600,000(SH) (SOLE) 600,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- BIOGEN IDEC INC COM 09062X103 11,320 250,000(SH) (SOLE) 250,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- BROADCOM CORP CL A 111320107 18,615 394,800(SH) (SOLE) 394,800(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- CARDINAL HEALTH INC COM 14149Y108 20,412 296,900(SH) (SOLE) 296,900(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- CAREMARK RX INC COM 141705103 51,039 985,500(SH) (SOLE) 985,500(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- CHESAPEAKE ENERGY CORP COM 165167107 31,419 990,200(SH) (SOLE) 990,200(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- CHICAGO BRIDGE & IRON CO NV NY REGISTRY SH 167250109 7,563 300,000(SH) (SOLE) 300,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- CONSOL ENERGY INC COM 20854P109 7,822 120,000(SH) (SOLE) 120,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- CORAUTUS GENETICS INC COM 218139202 3,162 760,000(SH) (SOLE) 760,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- COVANTA HOLDING CORP COM 22282E102 40,511 2,690,000(SH) (SOLE) 2,690,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- CV THERAPEUTICS INC COM 126667104 7,603 307,450(SH) (SOLE) 307,450(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- DEALERTRACK HLDGS INC COM 242309102 7,868 375,000(SH) (SOLE) 375,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- EBAY INC COM 278642103 18,185 420,750(SH) (SOLE) 420,750(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- ECLIPSYS CORP COM 278856109 7,496 396,000(SH) (SOLE) 396,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- ELECTRONIC DATA SYS NEW COM 285661104 14,424 600,000(SH) (SOLE) 600,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- GENERAL MTRS CORP COM 370442105 15,536 800,000(SH) (SOLE) 800,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- GOOGLE INC CL A 38259P508 26,595 64,105(SH) (SOLE) 64,105(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- GUIDANT CORP COM 401698105 11,299 174,500(SH) (SOLE) 174,500(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- HARRIS INTERACTIVE INC COM 414549105 4,741 1,100,000(SH) (SOLE) 1,100,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- HOUSEVALUES INC COM 44183Y102 8,476 650,000(SH) (SOLE) 650,000 (SOLE) ---------------------------------------------------------------------------------------------------------------------------------- ICICI BK LTD ADR 45104G104 31,680 1,100,000(SH) (SOLE) 1,100,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- IKANOS COMMUNICATIONS COM 45173E105 3,523 239,000(SH) (SOLE) 239,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- IMS HEALTH INC COM 449934108 4,934 198,000(SH) (SOLE) 198,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- INTEGRATED DEVICE TECHNOLOGY COM 458118106 10,284 780,300(SH) (SOLE) 780,300(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- INVITROGEN CORP COM 46185R100 14,161 212,500(SH) (SOLE) 212,500(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- KONGZHONG CORP SPONSORED ADR 50047P104 27,938 2,235,000(SH) (SOLE) 2,235,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- MAXWELL TECHNOLOGIES INC COM 577767106 4,464 315,000(SH) (SOLE) 315,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- MICROSOFT CORP COM 594918104 26,150 1,000,000(SH)CALL (SOLE) 1,000,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- MIDCAP SPDR TR UNIT SER 1 595635103 101,018 750,000(SH)PUT (SOLE) 750,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- NABORS INDUSTRIES LTD SHS G6359F103 18,725 247,200(SH) (SOLE) 247,200(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- NEKTAR THERAPEUTICS COM 640268108 15,637 950,000(SH) (SOLE) 950,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- NETLOGIC MICROSYSTEMS INC COM 64118B100 13,620 500,000(SH) (SOLE) 500,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- ORIGIN AGRITECH LTD SHS G67828106 9,875 771,500(SH) (SOLE) 771,500(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- PANACOS PHARMACEUTICALS INC COM 69811Q106 4,331 625,000(SH) (SOLE) 625,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- PARKER HANNIFIN CORP COM 701094104 8,905 135,000(SH) (SOLE) 135,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- PIONEER COS INC COM NEW 723643300 22,696 757,300(SH) (SOLE) 757,300(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- SAKS INC COM 79377W108 6,698 397,300(SH) (SOLE) 397,300(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- SATYAM COMPUTER SERVICES LTD ADR 804098101 26,273 718,050(SH) (SOLE) 718,050(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- SPRINT NEXTEL CORP COM FON 852061100 6,324 270,700(SH) (SOLE) 270,700(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- SUNTECH POWER HLDGS CO LTD ADR 86800C104 1,363 50,000(SH) (SOLE) 50,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- SUPERGEN INC COM 868059106 3,661 725,000(SH) (SOLE) 725,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- TODCO CL A 88889T107 13,321 350,000(SH) (SOLE) 350,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- TYCO INTL LTD NEW COM 902124106 36,075 1,250,000(SH)CALL (SOLE) 1,250,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- GRACE W R & CO DEL NEW COM 38388F108 25,756 2,740,000(SH) (SOLE) 2,740,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- WALTER INDS INC COM 93317Q105 33,561 675,000(SH) (SOLE) 675,000(SOLE) ---------------------------------------------------------------------------------------------------------------------------------- YOUBET COM INC COM 987413101 9,091 1,922,000(SH) (SOLE) 1,922,000(SOLE) ----------------------------------------------------------------------------------------------------------------------------------