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: March 31, 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: 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 5/9/06 ------------------------ -------------------------- ------- [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: 54 ------------- Form 13F Information Table Value Total: $851,150 ------------- (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 --------------------------------- -------------- --------- -------- -------- --- ---- ---------- -------- -------- -------- ------- AETNA INC NEW COM 00817Y108 34,113 694,200 SH SOLE 694,200 AMERICAN EAGLE OUTFITTERS NE COM 02553E106 4,479 150,000 SH CALL SOLE 150,000 AMGEN INC COM 031162100 7,275 100,000 SH SOLE 100,000 APPLE COMPUTER INC COM 037833100 7,840 125,000 SH SOLE 125,000 BIOGEN IDEC INC COM 09062X103 24,513 520,450 SH SOLE 520,450 BROADCOM CORP CL A 111320107 23,738 550,000 SH SOLE 550,000 CARDINAL HEALTH INC COM 14149Y108 21,909 294,000 SH SOLE 294,000 CAREMARK RX INC COM 141705103 59,754 1,215,000 SH SOLE 1,215,000 CHICAGO BRIDGE & IRON CO NV NY REGISTRY SH 167250109 19,044 793,500 SH SOLE 793,500 CHINA MED TECHNOLOGIES INC SPONSORED ADR 169483104 5,287 175,000 SH SOLE 175,000 CONNETICS CORP COM 208192104 10,073 595,000 SH SOLE 595,000 CORAUTUS GENETICS INC COM NEW 218139202 4,117 1,186,500 SH SOLE 1,186,500 COVANTA HLDG CORP COM 22282E102 38,234 2,293,600 SH SOLE 2,293,600 ECLIPSYS CORP COM 278856109 13,461 570,150 SH SOLE 570,150 ENSCO INTL INC COM 26874Q100 17,879 347,500 SH SOLE 347,500 FORMFACTOR INC COM 346375108 13,642 346,950 SH SOLE 346,950 FOXHOLLOW TECHNOLOGIES INC COM 35166A103 38,951 1,275,000 SH SOLE 1,275,000 GENERAL ELECTRIC CO COM 369604103 34,484 991,500 SH CALL SOLE 991,500 GRACE W R & CO DEL NEW COM 38388F108 43,890 3,300,000 SH SOLE 3,300,000 HALLIBURTON CO COM 406216101 9,047 123,900 SH SOLE 123,900 HARRIS INTERACTIVE INC COM 414549105 5,793 1,030,750 SH SOLE 1,030,750 HEALTHEXTRAS INC COM 422211102 4,413 125,000 SH SOLE 125,000 I2 TECHNOLOGIES INC COM NEW 465754208 3,412 198,350 SH SOLE 198,350 ICICI BK LTD ADR 45104G104 30,162 1,089,650 SH SOLE 1,089,650 INDIA GLOBALIZATION CAP INC UNIT 99/99/99 45408X209 1,358 205,800 SH SOLE 205,800 INTEGRATED DEVICE TECHNOLOGY COM 458118106 9,946 669,300 SH SOLE 669,300 INVITROGEN CORP COM 46185R100 20,850 297,300 SH SOLE 297,300 KOPPERS HOLDINGS INC COM 50060P106 6,136 312,250 SH SOLE 312,250 MARVELL TECHNOLOGY GROUP LTD ORD G5876H105 8,115 150,000 SH SOLE 150,000 MASCO CORP COM 574599106 1,625 50,000 SH CALL SOLE 50,000 MAXWELL TECHNOLOGIES INC COM 577767106 5,609 287,500 SH SOLE 287,500 MICROSOFT CORP COM 594918104 60,733 2,232,000 SH CALL SOLE 2,232,000 NATCO GROUP INC CL A 63227W203 6,911 255,000 SH SOLE 255,000 NEKTAR THERAPEUTICS COM 640268108 21,210 1,040,750 SH SOLE 1,040,750 NUVELO INC COM NEW 67072M301 5,309 297,900 SH SOLE 297,900 OMNICARE INC COM 681904108 13,632 247,900 SH SOLE 247,900 ORIGIN AGRITECH LIMITED SHS G67828106 11,493 669,750 SH SOLE 669,750 PACIFIC ETHANOL INC COM 69423U107 13,062 605,000 SH SOLE 605,000 PANACOS PHARMACEUTICALS INC COM 69811Q106 5,246 693,900 SH SOLE 693,900 PIONEER COS INC COM NEW 723643300 19,050 624,600 SH SOLE 624,600 POWER INTEGRATIONS INC COM 739276103 2,478 100,000 SH SOLE 100,000 QUALCOMM INC COM 747525103 17,714 350,000 SH SOLE 350,000 QUALITY SYS INC COM 747582104 14,438 436,200 SH SOLE 436,200 QUEST DIAGNOSTICS INC COM 74834L100 11,455 223,300 SH SOLE 223,300 RTI INTL METALS INC COM 74973W107 9,516 173,500 SH SOLE 173,500 SATYAM COMPUTER SERVICES LTD ADR 804098101 32,547 743,750 SH SOLE 743,750 SONUS NETWORKS INC COM 835916907 2,055 375,000 SH CALL SOLE 375,000 STARWOOD HOTELS & RESORTS WRLD PAIRED CTF 85590A401 9,387 138,600 SH SOLE 138,600 SUN MICROSYSTEMS INC COM 866810104 7,695 1,500,000 SH SOLE 1,500,000 SUPERGEN INC COM 868059106 4,828 850,000 SH SOLE 850,000 TODCO CL A 88889T107 11,723 297,450 SH SOLE 297,450 TYCO INTL LTD NEW COM 902124106 22,649 842,600 SH SOLE 842,600 UAL CORP COM NEW 902549807 9,903 248,000 SH SOLE 248,000 VALERO ENERGY CORP NEW COM 91913Y100 8,967 150,000 SH SOLE 150,000