Ardsley Advisory Partners

Ardsley Advisory Partners as of Dec. 31, 2010

Portfolio Holdings for Ardsley Advisory Partners

Ardsley Advisory Partners holds 91 positions in its portfolio as reported in the December 2010 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Halliburton Company (HAL) 8.2 $53M 1.3M 40.83
JPMorgan Chase & Co. (JPM) 6.6 $42M 1.0M 42.42
Yuhe International (YUII) 3.5 $22M 2.5M 8.95
Apple (AAPL) 3.4 $22M 68k 322.57
Anadarko Petroleum Corporation 3.0 $19M 250k 76.16
Citi 2.9 $19M 3.9M 4.73
Yongye International 2.9 $18M 2.2M 8.40
ArthroCare Corporation 2.8 $18M 582k 31.06
China Valves Technology 2.8 $18M 1.7M 10.48
Oracle Corporation (ORCL) 2.6 $17M 547k 31.30
Harbin Electric 2.6 $17M 975k 17.35
Amarin Corporation (AMRN) 2.3 $15M 1.8M 8.20
Rubicon Technology 2.3 $15M 695k 21.08
Industries N shs - a - (LYB) 2.2 $14M 416k 34.40
Rockwood Holdings 2.2 $14M 365k 39.12
Monsanto Company 2.1 $14M 193k 69.64
Qualcomm (QCOM) 1.9 $12M 249k 49.49
Wonder Auto Technology 1.9 $12M 1.6M 7.54
Petroleo Brasileiro SA (PBR.A) 1.8 $12M 337k 34.17
Hess (HES) 1.8 $11M 148k 76.54
Mellanox Technologies 1.7 $11M 415k 26.17
Ford Mtr Co Del *w exp 01/01/201 1.6 $10M 1.3M 8.15
VMware 1.5 $9.4M 106k 88.91
Halozyme Therapeutics (HALO) 1.5 $9.4M 1.2M 7.92
Heckmann Corporation 1.4 $9.1M 1.8M 5.03
China Yida Holding 1.4 $9.0M 881k 10.16
F5 Networks (FFIV) 1.4 $8.9M 68k 130.16
Pfizer (PFE) 1.3 $8.4M 479k 17.51
Yahoo! 1.3 $8.3M 500k 16.63
Comverge 1.3 $8.1M 1.2M 6.91
Radian (RDN) 1.2 $7.8M 964k 8.07
Westport Innovations 1.2 $7.6M 408k 18.52
Healthsouth 1.0 $6.6M 319k 20.71
Hldgs (UAL) 1.0 $6.6M 275k 23.82
Sino Clean Energy 1.0 $6.5M 990k 6.61
Human Genome Sciences 1.0 $6.3M 263k 23.89
Bridgepoint Education 0.9 $5.7M 300k 19.00
QKL Stores 0.8 $5.3M 1.5M 3.55
OmniVision Technologies 0.8 $5.2M 175k 29.61
China Medical Technologies 0.8 $4.9M 438k 11.24
Calix (CALX) 0.7 $4.2M 250k 16.90
Transatlantic Petroleum 0.6 $4.0M 1.2M 3.33
Market Vectors Junior Gold Miners ETF 0.6 $4.0M 100k 39.89
EnteroMedics 0.6 $3.8M 1.2M 3.08
Exide Technologies 0.6 $3.8M 400k 9.41
Metali 0.6 $3.5M 600k 5.88
Covanta Holding Corporation 0.5 $3.4M 200k 17.19
Globe Specialty Metals 0.5 $3.4M 200k 17.09
Telvent Git Alcobendas Com Stk 0.5 $3.3M 125k 26.42
First Solar (FSLR) 0.5 $3.3M 25k 130.16
Keyuan Petrochemicals (KEYP) 0.5 $3.2M 715k 4.45
ZBB Energy Corporation (ZBB) 0.5 $3.1M 2.9M 1.08
Active Power 0.5 $3.0M 1.2M 2.46
iSoftStone Holdings 0.5 $2.9M 160k 18.17
Imris (IMRSQ) 0.4 $2.8M 487k 5.75
Sensata Technologies Hldg Bv 0.4 $2.7M 90k 30.11
SPX Corporation 0.4 $2.5M 35k 71.49
Infinera (INFN) 0.4 $2.3M 225k 10.33
FuelCell Energy 0.4 $2.3M 1.0M 2.31
General Electric Company 0.3 $2.3M 125k 18.29
Ecotality 0.3 $2.2M 694k 3.22
Fuel Systems Solutions 0.3 $2.2M 75k 29.39
Openwave Systems 0.3 $2.1M 1.0M 2.12
Coeur d'Alene Mines Corporation (CDE) 0.3 $2.0M 75k 27.32
Weyerhaeuser Company (WY) 0.3 $1.9M 100k 18.93
Global Power Equipment Grp I 0.3 $1.9M 80k 23.19
Solutia 0.3 $1.7M 75k 23.08
Titanium Metals Corporation 0.3 $1.7M 100k 17.18
Headwaters Incorporated 0.3 $1.7M 375k 4.58
Trina Solar 0.3 $1.8M 75k 23.43
Fuel Tech (FTEK) 0.3 $1.7M 170k 9.71
EnerNOC 0.3 $1.7M 70k 23.91
China Hydroelectric Corp 0.2 $1.6M 215k 7.39
Capstone Turbine Corporation 0.2 $1.4M 1.5M 0.96
Calpine Corporation 0.2 $1.3M 100k 13.34
Daqo New Energy 0.2 $1.3M 125k 10.16
Cameco Corporation (CCJ) 0.2 $1.2M 30k 40.37
Tutor Perini Corporation (TPC) 0.2 $1.1M 50k 21.42
Green Plains Renewable Energy (GPRE) 0.2 $1.1M 100k 11.26
GSE Systems 0.2 $1.1M 300k 3.62
Primo Water Corporation 0.2 $1.1M 75k 14.21
Axt (AXTI) 0.2 $1.0M 100k 10.44
Quality Distribution 0.2 $1.0M 111k 9.09
Quanta Services (PWR) 0.1 $996k 50k 19.92
Commercial Metals Company (CMC) 0.1 $830k 50k 16.60
LDK Solar 0.1 $860k 85k 10.12
China Yuchai Intl (CYD) 0.1 $792k 25k 31.68
GT Solar International 0.1 $684k 75k 9.12
MasTec (MTZ) 0.1 $730k 50k 14.60
Golar Lng (GLNG) 0.1 $675k 45k 15.00
United States Natural Gas Fund 0.1 $300k 50k 6.00