Ardsley Advisory Partners

Ardsley Advisory Partners as of March 31, 2011

Portfolio Holdings for Ardsley Advisory Partners

Ardsley Advisory Partners holds 109 positions in its portfolio as reported in the March 2011 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Halliburton Company (HAL) 9.2 $64M 1.3M 49.84
JPMorgan Chase & Co. (JPM) 6.7 $46M 1.0M 46.10
ArthroCare Corporation 3.4 $23M 700k 33.34
BroadSoft 3.3 $23M 475k 47.62
Harbin Electric 3.2 $22M 1.1M 20.69
Alcatel-Lucent 3.0 $21M 3.6M 5.81
Linn Energy 2.5 $18M 450k 38.93
Amarin Corporation (AMRN) 2.5 $17M 2.4M 7.30
Rockwood Holdings 2.4 $17M 340k 49.22
Yuhe International (YUII) 2.4 $17M 2.5M 6.66
Industries N shs - a - (LYB) 2.4 $17M 416k 39.55
Anadarko Petroleum Corporation 2.4 $16M 200k 81.92
Westport Innovations 2.2 $15M 700k 21.98
Human Genome Sciences 2.0 $14M 500k 27.45
Baxter International (BAX) 1.9 $13M 250k 53.77
Yahoo! 1.9 $13M 800k 16.68
Spdr S&p 500 Etf (SPY) 1.9 $13M 100k 132.59
United States Steel Corporation (X) 1.8 $12M 225k 53.94
Qualcomm (QCOM) 1.6 $11M 200k 54.83
Oracle Corporation (ORCL) 1.5 $10M 307k 33.43
Moly 1.4 $9.9M 165k 60.02
Alpha Natural Resources 1.4 $9.8M 165k 59.37
Heckmann Corporation 1.4 $9.8M 1.5M 6.55
Halozyme Therapeutics (HALO) 1.4 $9.4M 1.4M 6.70
Mellanox Technologies 1.3 $8.8M 350k 25.23
Radian (RDN) 1.2 $8.3M 1.2M 6.81
Pfizer (PFE) 1.2 $8.1M 400k 20.31
VMware 1.2 $8.2M 100k 81.54
Weatherford International Lt reg 1.1 $7.9M 350k 22.60
Gannett 1.1 $7.6M 500k 15.23
Wonder Auto Technology 1.1 $7.4M 1.4M 5.42
Chesapeake Energy Corporation 1.0 $6.7M 200k 33.52
China Yida Holding 1.0 $6.7M 882k 7.60
Comverge 0.9 $6.1M 1.3M 4.66
Globe Specialty Metals 0.9 $5.9M 260k 22.76
Delta Air Lines (DAL) 0.8 $5.9M 600k 9.80
Market Vectors Junior Gold Miners ETF 0.8 $5.9M 150k 39.22
Yongye International 0.8 $5.8M 950k 6.13
Newfield Exploration 0.8 $5.7M 75k 76.01
Pioneer Natural Resources (PXD) 0.8 $5.6M 55k 101.93
Freeport-McMoRan Copper & Gold (FCX) 0.8 $5.6M 100k 55.55
Bridgepoint Education 0.7 $5.1M 300k 17.10
Sino Clean Energy 0.7 $4.8M 850k 5.70
Exide Technologies 0.7 $4.7M 425k 11.17
Nxp Semiconductors N V (NXPI) 0.7 $4.8M 160k 29.96
SandRidge Energy 0.7 $4.5M 350k 12.80
Fuel Systems Solutions 0.7 $4.5M 150k 30.18
QKL Stores 0.6 $4.2M 1.6M 2.64
Sensata Technologies Hldg Bv 0.6 $4.2M 120k 34.73
EnteroMedics 0.6 $4.1M 1.5M 2.76
Calix (CALX) 0.6 $4.1M 200k 20.31
Covanta Holding Corporation 0.6 $3.8M 225k 17.08
KBR (KBR) 0.6 $3.8M 100k 37.77
Imris (IMRSQ) 0.6 $3.8M 525k 7.26
American Superconductor Corporation 0.5 $3.7M 150k 24.87
Transatlantic Petroleum 0.5 $3.8M 1.2M 3.10
Keyuan Petrochemicals (KEYP) 0.5 $3.5M 714k 4.88
ZBB Energy Corporation (ZBB) 0.5 $3.3M 2.9M 1.16
Calpine Corporation 0.5 $3.2M 200k 15.87
Steel Dynamics (STLD) 0.4 $2.8M 150k 18.77
China Valves Technology 0.4 $2.9M 615k 4.64
Rubicon Technology 0.4 $2.8M 100k 27.68
Telvent Git Alcobendas Com Stk 0.4 $2.8M 95k 29.11
Examworks 0.4 $2.8M 125k 22.23
FuelCell Energy 0.4 $2.7M 1.3M 2.14
Ormat Technologies (ORA) 0.4 $2.5M 100k 25.33
Cosan Ltd shs a 0.4 $2.5M 196k 12.90
Global Power Equipment Grp I 0.3 $2.2M 81k 27.50
Ecotality 0.3 $2.2M 687k 3.16
Solutia 0.3 $1.9M 75k 25.40
Active Power 0.3 $1.9M 650k 2.93
Alcoa 0.3 $1.8M 100k 17.66
Headwaters Incorporated 0.3 $1.8M 300k 5.90
Coeur d'Alene Mines Corporation (CDE) 0.2 $1.7M 50k 34.78
China Hydroelectric Corp 0.2 $1.6M 225k 7.26
Metali 0.2 $1.6M 250k 6.22
JINPAN International 0.2 $1.5M 132k 11.68
China Yuchai Intl (CYD) 0.2 $1.5M 50k 29.34
Tesla Motors (TSLA) 0.2 $1.4M 50k 27.76
SunPower Corporation 0.2 $1.3M 75k 17.13
Green Plains Renewable Energy (GPRE) 0.2 $1.3M 110k 12.02
Boeing Company (BA) 0.2 $1.1M 15k 73.93
Quanta Services (PWR) 0.2 $1.1M 50k 22.44
Johnson Controls 0.1 $1.0M 25k 41.56
Quality Distribution 0.1 $1.0M 86k 11.85
Cereplast (CERP) 0.1 $998k 210k 4.75
American Railcar Industries 0.1 $874k 35k 24.97
Titanium Metals Corporation 0.1 $929k 50k 18.58
Generac Holdings (GNRC) 0.1 $913k 45k 20.29
Tsakos Energy Navigation 0.1 $824k 75k 10.99
New Oriental Education & Tech 0.1 $500k 5.0k 100.00
VisionChina Media 0.1 $433k 100k 4.33
Keynote Systems 0.1 $399k 22k 18.56
Brocade Communications Systems 0.1 $338k 55k 6.15
FalconStor Software 0.1 $319k 70k 4.56
Focus Media Holding 0.0 $307k 10k 30.70
Telefonaktiebolaget LM Ericsson (ERIC) 0.0 $257k 20k 12.85
Atmel Corporation 0.0 $273k 20k 13.65
NetEase (NTES) 0.0 $248k 5.0k 49.60
Baidu (BIDU) 0.0 $276k 2.0k 138.00
Finisar Corporation 0.0 $246k 10k 24.60
tw tele 0.0 $288k 15k 19.20
Sierra Wireless 0.0 $273k 25k 10.92
Sonus Networks 0.0 $301k 80k 3.76
Yucheng Technologies 0.0 $261k 65k 4.02
MetroPCS Communications 0.0 $244k 15k 16.27
Ctrip.com International 0.0 $207k 5.0k 41.40
China Lodging 0.0 $174k 10k 17.40
Blue Coat Systems 0.0 $141k 5.0k 28.20