Ardsley Advisory Partners

Ardsley Advisory Partners as of March 31, 2013

Portfolio Holdings for Ardsley Advisory Partners

Ardsley Advisory Partners holds 129 positions in its portfolio as reported in the March 2013 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Spdr S&p 500 Etf (SPY) 22.2 $156M 996k 156.67
United Rentals (URI) 4.9 $35M 628k 54.97
Linn Energy 4.3 $30M 790k 37.97
Pfizer (PFE) 4.1 $29M 1.0M 28.86
Jazz Pharmaceuticals (JAZZ) 3.5 $25M 447k 55.91
Actavis 3.0 $21M 231k 92.11
iShares Russell 2000 Index (IWM) 2.7 $19M 200k 94.43
Industries N shs - a - (LYB) 2.7 $19M 297k 63.29
Freeport-McMoRan Copper & Gold (FCX) 2.6 $19M 562k 33.10
Anadarko Petroleum Corporation 2.4 $17M 193k 87.45
Saba Software 2.3 $16M 2.1M 7.95
SPDR Gold Trust (GLD) 2.2 $15M 100k 154.47
Michael Kors Holdings 1.8 $13M 222k 56.79
TiVo 1.7 $12M 981k 12.39
Ellie Mae 1.7 $12M 493k 24.05
Pioneer Natural Resources (PXD) 1.6 $11M 90k 124.26
Hologic (HOLX) 1.5 $11M 466k 22.60
NetEase (NTES) 1.4 $10M 183k 54.77
Riverbed Technology 1.4 $9.6M 642k 14.92
USG Corporation 1.3 $9.1M 344k 26.44
Newcastle Investment 1.3 $8.9M 800k 11.17
Sensata Technologies Hldg Bv 1.2 $8.6M 262k 32.87
Lennar Corporation (LEN) 1.2 $8.5M 206k 41.48
eBay (EBAY) 1.2 $8.4M 155k 54.22
Ensco Plc Shs Class A 1.1 $8.0M 134k 60.00
EnerSys (ENS) 1.1 $7.9M 174k 45.58
Tripadvisor (TRIP) 1.1 $7.9M 150k 52.52
Primoris Services (PRIM) 1.1 $7.7M 350k 22.11
D.R. Horton (DHI) 1.1 $7.7M 317k 24.30
Intel Corporation (INTC) 1.0 $6.8M 311k 21.84
Sequenom 1.0 $6.8M 1.6M 4.15
Active Power 0.9 $6.6M 1.4M 4.59
Fortinet (FTNT) 0.9 $6.2M 262k 23.68
Westport Innovations 0.9 $6.2M 209k 29.52
Nxp Semiconductors N V (NXPI) 0.8 $5.8M 193k 30.29
Imperva 0.8 $5.9M 153k 38.50
Regional Management (RM) 0.8 $5.7M 280k 20.20
Claymore/AlphaShares China Small Cap ETF 0.7 $5.1M 218k 23.62
Tesla Motors (TSLA) 0.7 $4.8M 128k 37.89
LivePerson (LPSN) 0.7 $4.8M 350k 13.58
Globecomm Systems 0.7 $4.7M 393k 12.01
Yelp Inc cl a (YELP) 0.6 $4.2M 179k 23.71
Ormat Technologies (ORA) 0.6 $4.1M 200k 20.65
Weyerhaeuser Company (WY) 0.5 $3.1M 100k 31.38
Lennar Corporation (LEN.B) 0.4 $3.1M 97k 32.26
World Energy Solutions 0.4 $3.0M 673k 4.39
EnteroMedics 0.4 $3.0M 3.0M 1.00
Thor Industries (THO) 0.4 $2.8M 75k 36.79
Itron (ITRI) 0.3 $2.1M 45k 46.40
Nationstar Mortgage 0.3 $1.8M 50k 36.90
EnerNOC 0.2 $1.8M 102k 17.37
Rockwood Holdings 0.2 $1.7M 26k 65.43
3D Systems Corporation (DDD) 0.2 $1.7M 53k 32.25
Mrc Global Inc cmn (MRC) 0.2 $1.6M 49k 32.93
Veeco Instruments (VECO) 0.2 $1.5M 40k 38.40
Tronox 0.2 $1.4M 73k 19.81
Pentair 0.2 $1.3M 24k 52.77
Ada-es 0.2 $1.2M 44k 26.58
Mueller Water Products (MWA) 0.2 $1.2M 194k 5.93
Stillwater Mining Company 0.2 $1.1M 85k 12.93
Babcock & Wilcox 0.2 $1.1M 39k 28.40
Remy International 0.2 $1.1M 61k 18.08
Casella Waste Systems (CWST) 0.1 $1.1M 245k 4.37
ZBB Energy Corporation (ZBB) 0.1 $1.1M 2.5M 0.43
Cameco Corporation (CCJ) 0.1 $1.0M 48k 20.79
Calpine Corporation 0.1 $1.0M 49k 20.60
General Cable Corporation 0.1 $916k 25k 36.64
United States Steel Corporation (X) 0.1 $946k 49k 19.51
Sunopta (STKL) 0.1 $939k 130k 7.20
Solarcity 0.1 $910k 48k 18.88
Sony Corporation (SONY) 0.1 $844k 49k 17.40
Cheniere Energy (LNG) 0.1 $865k 31k 27.99
Focus Media Holding 0.1 $804k 30k 26.80
Granite Construction (GVA) 0.1 $774k 24k 31.85
Exide Technologies 0.1 $785k 291k 2.70
Steel Dynamics (STLD) 0.1 $778k 49k 15.88
Ameres (AMRC) 0.1 $740k 100k 7.40
Great Lakes Dredge & Dock Corporation (GLDD) 0.1 $684k 102k 6.73
Rda Microelectronics 0.1 $685k 74k 9.26
ProShares UltraShort Euro (EUO) 0.1 $686k 34k 20.00
Ford Motor Company (F) 0.1 $658k 50k 13.16
Gilead Sciences (GILD) 0.1 $612k 13k 48.96
Chicago Bridge & Iron Company 0.1 $621k 10k 62.10
Numerex 0.1 $619k 48k 12.79
Onyx Pharmaceuticals 0.1 $533k 6.0k 88.83
Power-One 0.1 $596k 144k 4.14
Omnicare 0.1 $509k 13k 40.72
ArthroCare Corporation 0.1 $521k 15k 34.73
Fuel Tech (FTEK) 0.1 $505k 117k 4.32
Petrologistics 0.1 $467k 34k 13.78
Bristol Myers Squibb (BMY) 0.1 $391k 9.5k 41.16
Laboratory Corp. of America Holdings (LH) 0.1 $406k 4.5k 90.22
Gevo 0.1 $457k 204k 2.24
Health Care SPDR (XLV) 0.1 $368k 8.0k 46.00
Merck & Co (MRK) 0.1 $332k 7.5k 44.27
Sanofi-Aventis SA (SNY) 0.1 $332k 6.5k 51.08
Shire 0.1 $320k 3.5k 91.43
Coleman Cable 0.1 $375k 25k 15.00
Qihoo 360 Technologies Co Lt 0.1 $356k 12k 29.67
Universal Health Services (UHS) 0.0 $303k 4.8k 63.79
Aetna 0.0 $256k 5.0k 51.20
Forest Laboratories 0.0 $285k 7.5k 38.00
Quest Diagnostics Incorporated (DGX) 0.0 $282k 5.0k 56.40
Trina Solar 0.0 $272k 75k 3.63
Silver Spring Networks 0.0 $260k 15k 17.33
Charles River Laboratories (CRL) 0.0 $221k 5.0k 44.20
Discovery Communications 0.0 $236k 3.0k 78.67
Micron Technology (MU) 0.0 $180k 18k 10.00
hhgregg (HGGG) 0.0 $188k 17k 11.06
Ariad Pharmaceuticals 0.0 $181k 10k 18.10
AtriCure (ATRC) 0.0 $198k 25k 7.92
Covidien 0.0 $237k 3.5k 67.71
Avg Technologies 0.0 $209k 15k 13.93
Icon (ICLR) 0.0 $242k 7.5k 32.27
Leap Wireless International 0.0 $118k 20k 5.90
LSI Corporation 0.0 $170k 25k 6.80
Live Nation Entertainment (LYV) 0.0 $124k 10k 12.40
MetroPCS Communications 0.0 $109k 10k 10.90
KEYW Holding 0.0 $161k 10k 16.10
CECO Environmental (CECO) 0.0 $129k 10k 12.90
Responsys 0.0 $133k 15k 8.87
REPCOM cla 0.0 $172k 10k 16.86
Meru Networks 0.0 $68k 10k 6.80
Tellabs 0.0 $105k 50k 2.10
Alcatel-Lucent 0.0 $53k 40k 1.32
Sonus Networks 0.0 $104k 40k 2.60
Nanosphere 0.0 $55k 25k 2.20
Achillion Pharmaceuticals 0.0 $88k 10k 8.80
iSoftStone Holdings 0.0 $93k 19k 4.89