Ardsley Advisory Partners LP

In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 15, 2025), Ardsley Advisory Partners LP reported 102 stock positions worth $431.7 million. Its top holding was Fluor (FLR) at 6.1% of the portfolio, followed by Broadcom (AVGO, 5.1%) and Alamos Gold Class A (AGI, 3.4%). Compared with Q4 2024, it opened 48 new positions, sold out of 47, added to 26 and reduced 25. The biggest buy was Broadcom (AVGO, shares +374%) and the biggest sale Salesforce (CRM, shares −76%).

Most Recent 13F
Q2 2026
Location
Norwalk, CT
CIK
0000900529
Portfolio Value
$431.7M (Q1 2025)
SEC Filing
0001172661-25-002033 ↗ filed May 15, 2025

Holdings Value

0$200.0M$400.0M$600.0M$800.0M$1.0B Q1 2024: $696.1M Q1 2024 Q2 2024: $552.7M Q2 2024 Q3 2024: $528.5M Q3 2024 Q4 2024: $516.3M Q4 2024 Q1 2025: $431.7M $431.7M Q1 2025 Q2 2025: $611.9M Q2 2025 Q3 2025: $652.1M Q3 2025 Q4 2025: $785.4M Q4 2025 Q1 2026: $656.4M Q1 2026 Q2 2026: $921.1M Q2 2026

Holdings 102 stocks · $431.7M

FLR Fluor Corp. 6.10% 735,000 $26.3M Add +32.4%
AVGO Broadcom Inc. 5.14% 132,600 $22.2M Add +373.6%
AGI Alamos Gold Inc. Class A 3.41% 550,000 $14.7M Add +4.8%
CLS Celestica Inc. 3.40% 186,000 $14.7M Add +210.0%
OKTA Okta Inc. 2.62% 107,500 $11.3M Add +10.6%
ORCL Oracle Corp. 2.59% 80,000 $11.2M New
MELI MercadoLibre Inc. 2.33% 5,150 $10.0M Add +221.9%
ALDX Aldeyra Therapeutics Inc. 2.29% 1,750,000 $9.9M Add +52.2%
FCX Freeport-McMoran Inc. 2.19% 250,000 $9.5M New
RUN Sunrun Inc. 2.16% 1,590,000 $9.3M Add +68.3%
LSCC Lattice Semiconductor Corp. 2.08% 171,550 $9.0M Add +55.3%
XIFR XPLR Infrastructure LP 1.93% 875,000 $8.3M Add +360.5%
WULF Terawulf Inc. 1.88% 2,975,000 $8.1M Add +52.6%
TEVA Teva Pharmaceutical-SP ADR 1.78% 500,000 $7.7M Add +66.7%
BRBR Bellring Brands Inc. 1.64% 95,000 $7.1M Reduce -9.5%
MU Micron Technology Inc. 1.61% 80,000 $7.0M Add +128.6%
AMZN Amazon.com Inc. 1.60% 36,300 $6.9M Reduce -30.9%
NFLX Netflix Inc. 1.58% 7,300 $6.8M Reduce -33.6%
GSM Ferroglobe PLC 1.55% 1,802,595 $6.7M Add +8.1%
ADSK Autodesk Inc. 1.54% 25,450 $6.7M New
CRM Salesforce Inc. 1.40% 22,500 $6.0M Reduce -75.5%
CIEN Ciena Corp. 1.39% 99,500 $6.0M Add +298.0%
INDV Indivior Ltd. 1.38% 625,000 $6.0M Reduce -47.9%
ADMA Adma Biologics Inc. 1.38% 300,000 $6.0M New
SGRY Surgery Partners Inc. 1.38% 250,000 $5.9M Reduce -7.5%
NVDA Nvidia Corp. 1.36% 54,500 $5.9M New
COHR Coherent Corp. 1.35% 89,500 $5.8M New
STKL Sunopta Inc. 1.25% 1,110,000 $5.4M Reduce -20.1%
MP MP Materials Corp. 1.24% 220,000 $5.4M Reduce -4.3%
AMRC Ameresco Inc. Class A 1.12% 400,000 $4.8M New
DKNG Draftkings Inc. Class A 1.12% 145,000 $4.8M Reduce -3.3%
MTZ Mastec Inc. 1.08% 40,000 $4.7M Add +17.6%
SLV iShares Silver Trust 1.08% 150,000 $4.6M New
OSCR Oscar Health Inc. Class A 1.06% 350,000 $4.6M Reduce -68.9%
TEL Te Connectivity PLC 1.06% 32,400 $4.6M Reduce -12.0%
TEAM Atlassian Corp. Class A 1.05% 21,400 $4.5M Add +65.3%
ITRI Itron Inc. 1.03% 42,500 $4.5M Reduce -69.6%
MSFT Microsoft Corp. 1.02% 11,700 $4.4M Reduce -61.0%
SMCI Super Micro Computer Inc. 1.00% 126,700 $4.3M Reduce -48.3%
BIOX Bioceres Crop Solutions Corp. 1.00% 948,614 $4.3M Reduce -10.9%
CRDO Credo Technology Group Holdi 1.00% 107,000 $4.3M New
CYBR Cyberark Software Ltd./Israel 0.99% 12,700 $4.3M Add +111.7%
GLW Corning Inc. 0.95% 90,000 $4.1M Reduce -50.0%
SPRY Ars Pharmaceuticals Inc. 0.95% 325,000 $4.1M New
AES AES Corp. 0.91% 315,000 $3.9M Reduce -30.0%
SHOP Shopify Inc. Class A 0.90% 40,650 $3.9M New
SITM Sitime Corp. 0.89% 25,100 $3.8M New
PWR Quanta Services Inc. 0.88% 15,000 $3.8M New
ARM Arm Holdings PLC-ADR 0.86% 34,850 $3.7M Add +74.3%
TTMI TTM Technologies 0.75% 157,000 $3.2M New
FN Fabrinet 0.72% 15,750 $3.1M New
CCJ Cameco Corp. 0.71% 75,000 $3.1M No change
P Everpure Inc. Class A filed as PURE STORAGE INC 0.70% 68,000 $3.0M Add +51.1%
AEIS Advanced Energy Industries 0.68% 31,000 $3.0M Add +24.0%
CORZ Core Scientific Inc. 0.67% 400,000 $2.9M New
COMP Compass Inc. Class A 0.64% 317,800 $2.8M Add +429.7%
CEVA Ceva Inc. 0.63% 107,000 $2.7M New
S Sentinelone Inc. Class A 0.63% 150,000 $2.7M Reduce -42.3%
ROKU Roku Inc. 0.62% 38,000 $2.7M New
EBAY eBay Inc. 0.60% 38,000 $2.6M Add +43.4%
MIR Mirion Technologies Inc. 0.59% 175,000 $2.5M Add +40.0%
SPY SS SPDR S&P 500 ETF Trust-US 0.52% 4,000 $2.2M New
WNS WNS Holdings Ltd. filed as WNS HLDGS LTD 0.51% 36,000 $2.2M New
GTLS Chart Industries Inc. 0.50% 15,000 $2.2M Reduce -25.0%
PYPL PayPal Holdings Inc. 0.50% 33,000 $2.2M Reduce -55.4%
PRIM Primoris Services Corp. 0.47% 35,000 $2.0M New
MGNI Magnite Inc. 0.41% 156,000 $1.8M New
DOCN Digitalocean Holdings Inc. 0.41% 52,500 $1.8M New
PROF Profound Medical Corp. 0.40% 295,000 $1.7M No change
VERX Vertex Inc. Class A 0.38% 47,000 $1.6M New
CWEN Clearway Energy Inc. Class C 0.35% 50,000 $1.5M New
AMPL Amplitude Inc. Class A 0.32% 135,000 $1.4M New
AOSL Alpha & Omega Semiconductor 0.31% 53,700 $1.3M New
ORN Orion Group Holdings Inc. 0.30% 250,000 $1.3M Add +25.0%
TRIP Tripadvisor Inc. 0.30% 92,000 $1.3M New
DNN Denison Mines Corp. 0.30% 1,000,000 $1.3M No change
TAC Transalta Corp. 0.28% 130,000 $1.2M Reduce -80.7%
BABA Alibaba Group Holding-SP ADR 0.28% 9,000 $1.2M New
CHWY Chewy Inc. Class A 0.27% 36,000 $1.2M New
SHLS Shoals Technologies Group -A 0.27% 350,000 $1.2M New
ADBE Adobe Inc. 0.27% 3,000 $1.2M New
URA Global X Uranium ETF 0.27% 50,000 $1.1M New
ZBRA Zebra Technologies Corp. Class A 0.26% 4,000 $1.1M New
CLNE Clean Energy Fuels Corp. 0.25% 700,000 $1.1M Reduce -60.0%
HASI Ha Sustainable Infrastructur 0.24% 35,000 $1.0M Add +16.7%
WM Waste Management Inc. 0.21% 4,000 $926K New
ALGM Allegro Microsystems Inc. 0.19% 32,500 $817K New
PCTY Paylocity Holding Corp. 0.18% 4,200 $787K New
BOX Box Inc. Class A 0.17% 24,000 $741K New
BASE Couchbase Inc. 0.17% 46,500 $732K New
FLNC Fluence Energy Inc. 0.17% 150,000 $728K Reduce -70.9%
WDAY Workday Inc. Class A 0.16% 3,000 $701K New
BEPC Brookfield Renewable Corp. 0.16% 25,000 $698K New
FSLR First Solar Inc. 0.15% 5,000 $632K Reduce -87.8%
MYRG MYR Group Inc./Delaware 0.13% 5,000 $565K New
ARRY Array Technologies Inc. 0.11% 100,000 $487K New
GOOG Alphabet Inc. Class C 0.11% 3,000 $469K Reduce -90.0%
FIS Fidelity National Info Serv 0.09% 5,000 $373K New
CMRC Commerce.com Inc. filed as BIGCOMMERCE HLDGS INC 0.09% 64,500 $372K New
VRRM Verra Mobility Corp. 0.06% 12,000 $270K New

Show all 102 holdings

Options reported separately and not counted above: ICLN calls ($10.3M), ORCL calls ($9.8M), SMCI calls ($9.2M), TEL calls ($6.1M), AVGO calls ($4.9M), CLS calls ($4.6M), RUN calls ($3.8M), AAPL puts ($3.3M), NVDA calls ($3.3M), TAN calls ($3.0M), MGNI calls ($2.9M), ARM calls ($2.7M), and 25 more.

Portfolio Sells Q4 2024 → Q1 2025

CRM Salesforce Inc. Reduce -75.5% 1.40% −4.56
LITE Lumentum Holdings Inc. Sold out 0.00% −2.03
UNH Unitedhealth Group Inc. Sold out 0.00% −1.96
CAMT Camtek Ltd. Sold out 0.00% −1.96
ITRI Itron Inc. Reduce -69.6% 1.03% −1.91
OSCR Oscar Health Inc. Class A Reduce -68.9% 1.06% −1.87
TAC Transalta Corp. Reduce -80.7% 0.28% −1.57
NOW ServiceNow Inc. Sold out 0.00% −1.56
MIRM Mirum Pharmaceuticals Inc. Sold out 0.00% −1.52
INDV Indivior Ltd. Reduce -47.9% 1.38% −1.51
MSFT Microsoft Corp. Reduce -61.0% 1.02% −1.43
FLNC Fluence Energy Inc. Reduce -70.9% 0.17% −1.42
MRVL Marvell Technology Inc. Sold out 0.00% −1.28
FSLR First Solar Inc. Reduce -87.8% 0.15% −1.25
ELAN Elanco Animal Health Inc. Sold out 0.00% −1.17
META Meta Platforms Inc. Class A Sold out 0.00% −1.13
GOOG Alphabet Inc. Class C Reduce -90.0% 0.11% −1.00
FTAI Ftai Aviation Ltd. Sold out 0.00% −0.98
TER Teradyne Inc. Sold out 0.00% −0.96
IREN Iren Ltd. Sold out 0.00% −0.86
TSM Taiwan Semiconductor-SP ADR Sold out 0.00% −0.84
STKL Sunopta Inc. Reduce -20.1% 1.25% −0.82
AVAV Aerovironment Inc. Sold out 0.00% −0.82
EXPE Expedia Group Inc. Sold out 0.00% −0.79
PYPL PayPal Holdings Inc. Reduce -55.4% 0.50% −0.72
SNOW Snowflake Inc. Sold out 0.00% −0.72
GLW Corning Inc. Reduce -50.0% 0.95% −0.70
ONTO Onto Innovation Inc. Sold out 0.00% −0.69
BILL Bill Holdings Inc. Sold out 0.00% −0.67
AMZN Amazon.com Inc. Reduce -30.9% 1.60% −0.63
ASPN Aspen Aerogels Inc. Sold out 0.00% −0.60
CLNE Clean Energy Fuels Corp. Reduce -60.0% 0.25% −0.60
GEAR Revelyst Inc. Sold out 0.00% −0.56
RSP Invesco S&P 500 Equal Weight Sold out 0.00% −0.51
S Sentinelone Inc. Class A Reduce -42.3% 0.63% −0.49
AMSC American Superconductor Corp. Sold out 0.00% −0.48
ENPH Enphase Energy Inc. Sold out 0.00% −0.47
SMCI Super Micro Computer Inc. Reduce -48.3% 1.00% −0.44
XYZ Block Inc. Sold out 0.00% −0.43
NET Cloudflare Inc. Class A Sold out 0.00% −0.41
ZS Zscaler Inc. Sold out 0.00% −0.36
BE Bloom Energy Corp. Class A Sold out 0.00% −0.34
T AT&T Inc. Sold out 0.00% −0.33
NFLX Netflix Inc. Reduce -33.6% 1.58% −0.32
ETN Eaton Corp. PLC Sold out 0.00% −0.32
NXE Nexgen Energy Ltd. Sold out 0.00% −0.26
BIOX Bioceres Crop Solutions Corp. Reduce -10.9% 1.00% −0.25
TOST Toast Inc. Class A Sold out 0.00% −0.25
VIAV Viavi Solutions Inc. Sold out 0.00% −0.24
GTLS Chart Industries Inc. Reduce -25.0% 0.50% −0.24

Portfolio Buys Q4 2024 → Q1 2025

AVGO Broadcom Inc. Add +373.6% 5.14% +3.89
ORCL Oracle Corp. New 2.59% +2.59
CLS Celestica Inc. Add +210.0% 3.40% +2.32
FCX Freeport-McMoran Inc. New 2.19% +2.19
MELI MercadoLibre Inc. Add +221.9% 2.33% +1.80
ADSK Autodesk Inc. New 1.54% +1.54
AGI Alamos Gold Inc. Class A Add +4.8% 3.41% +1.53
ADMA Adma Biologics Inc. New 1.38% +1.38
NVDA Nvidia Corp. New 1.36% +1.36
COHR Coherent Corp. New 1.35% +1.35
XIFR XPLR Infrastructure LP Add +360.5% 1.93% +1.27
ALDX Aldeyra Therapeutics Inc. Add +52.2% 2.29% +1.18
OKTA Okta Inc. Add +10.6% 2.62% +1.13
AMRC Ameresco Inc. Class A New 1.12% +1.12
SLV iShares Silver Trust New 1.08% +1.08
MU Micron Technology Inc. Add +128.6% 1.61% +1.04
CRDO Credo Technology Group Holdi New 1.00% +1.00
CIEN Ciena Corp. Add +298.0% 1.39% +0.98
SPRY Ars Pharmaceuticals Inc. New 0.95% +0.95
SHOP Shopify Inc. Class A New 0.90% +0.90
SITM Sitime Corp. New 0.89% +0.89
PWR Quanta Services Inc. New 0.88% +0.88
LSCC Lattice Semiconductor Corp. Add +55.3% 2.08% +0.87
FLR Fluor Corp. Add +32.4% 6.10% +0.80
TTMI TTM Technologies New 0.75% +0.75
FN Fabrinet New 0.72% +0.72
CORZ Core Scientific Inc. New 0.67% +0.67
CEVA Ceva Inc. New 0.63% +0.63
ROKU Roku Inc. New 0.62% +0.62
CYBR Cyberark Software Ltd./Israel Add +111.7% 0.99% +0.61
COMP Compass Inc. Class A Add +429.7% 0.64% +0.57
SPY SS SPDR S&P 500 ETF Trust-US New 0.52% +0.52
WNS WNS Holdings Ltd. New 0.51% +0.51
TEVA Teva Pharmaceutical-SP ADR Add +66.7% 1.78% +0.50
PRIM Primoris Services Corp. New 0.47% +0.47
RUN Sunrun Inc. Add +68.3% 2.16% +0.47
TEAM Atlassian Corp. Class A Add +65.3% 1.05% +0.44
MGNI Magnite Inc. New 0.41% +0.41
DOCN Digitalocean Holdings Inc. New 0.41% +0.41
ARM Arm Holdings PLC-ADR Add +74.3% 0.86% +0.38
VERX Vertex Inc. Class A New 0.38% +0.38
CWEN Clearway Energy Inc. Class C New 0.35% +0.35
GSM Ferroglobe PLC Add +8.1% 1.55% +0.32
AMPL Amplitude Inc. Class A New 0.32% +0.32
AOSL Alpha & Omega Semiconductor New 0.31% +0.31
TRIP Tripadvisor Inc. New 0.30% +0.30
EBAY eBay Inc. Add +43.4% 0.60% +0.28
BABA Alibaba Group Holding-SP ADR New 0.28% +0.28
CHWY Chewy Inc. Class A New 0.27% +0.27
SHLS Shoals Technologies Group -A New 0.27% +0.27

Options Activity Q4 2024 → Q1 2025

ANET Arista Networks Inc. put Sold out 108,000 $11.9Mbefore exit
RSP Invesco S&P 500 Equal Weight call Sold out 60,000 $10.5Mbefore exit
ICLN iShares Global Clean Energy call New 900,000 $10.3M
ORCL Oracle Corp. call New 70,000 $9.8M
SMCI Super Micro Computer Inc. call New 270,000 $9.2M
SMTC Semtech Corp. put Sold out 125,000 $7.7Mbefore exit
CRM Salesforce Inc. call Sold out 20,000 $6.7Mbefore exit
NVDA Nvidia Corp. put Sold out 47,000 $6.3Mbefore exit
INTC Intel Corp. call Sold out 305,000 $6.1Mbefore exit
FXI iShares China Large-Cap ETF call Sold out 200,000 $6.1Mbefore exit
TEL Te Connectivity PLC call New 43,000 $6.1M
GOOG Alphabet Inc. Class C call Sold out 30,000 $5.7Mbefore exit
FTNT Fortinet Inc. put Sold out 55,000 $5.2Mbefore exit
AVGO Broadcom Inc. call New 29,100 $4.9M
CLS Celestica Inc. call New 59,000 $4.6M
SNOW Snowflake Inc. call Sold out 25,000 $3.9Mbefore exit
RUN Sunrun Inc. call Add +116.7% 650,000 $3.8M
MU Micron Technology Inc. call Sold out 40,000 $3.4Mbefore exit
AAPL Apple Inc. put New 15,000 $3.3M
NVDA Nvidia Corp. call New 30,000 $3.3M
TAN Invesco Solar ETF call Add +100.0% 100,000 $3.0M
MGNI Magnite Inc. call New 250,000 $2.9M
ARM Arm Holdings PLC-ADR call New 25,000 $2.7M
DOCS Doximity Inc. Class A put New 45,000 $2.6M
CRDO Credo Technology Group Holdi call New 65,000 $2.6M
CRDO Credo Technology Group Holdi put Sold out 38,000 $2.6Mbefore exit
ASPN Aspen Aerogels Inc. call Sold out 200,000 $2.4Mbefore exit
ALDX Aldeyra Therapeutics Inc. call Reduce -33.3% 400,000 $2.3M
GLW Corning Inc. call New 50,000 $2.3M
AMBA Ambarella Inc. call Sold out 30,000 $2.2Mbefore exit
MSFT Microsoft Corp. call New 5,000 $1.9M
PANW Palo Alto Networks Inc. put Sold out 10,000 $1.8Mbefore exit
AMRC Ameresco Inc. Class A put New 150,000 $1.8M
DT Dynatrace Inc. call Sold out 30,000 $1.6Mbefore exit
GL Globe Life Inc. put Sold out 14,000 $1.6Mbefore exit
WULF Terawulf Inc. call Reduce -23.1% 500,000 $1.4M
TRIP Tripadvisor Inc. call New 90,000 $1.3M
MRVL Marvell Technology Inc. call Sold out 10,000 $1.1Mbefore exit
TREE Lendingtree Inc. put Sold out 27,000 $1.0Mbefore exit
DOCN Digitalocean Holdings Inc. call New 30,000 $1.0M
AMZN Amazon.com Inc. call New 5,000 $951K
OKTA Okta Inc. call Sold out 12,000 $946Kbefore exit
CIEN Ciena Corp. call New 15,000 $906K
FLR Fluor Corp. call Reduce -50.0% 25,000 $896K
P Everpure Inc. Class A call New 20,000 $885K
LITE Lumentum Holdings Inc. call Sold out 10,000 $840Kbefore exit
ONTO Onto Innovation Inc. call Sold out 5,000 $833Kbefore exit
SMCI Super Micro Computer Inc. put Sold out 25,000 $762Kbefore exit
PCOR Procore Technologies Inc. call Sold out 10,000 $749Kbefore exit
S Sentinelone Inc. Class A call Sold out 30,000 $666Kbefore exit

Showing the first 50 of 66.

Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 130$921.1MSNDK, AMD, SEZL, WULF, BTSG
Q1 2026 117$656.4MUTHR, AVGO, SNDK, AMZN, ANET
Q4 2025 113$785.4MLLY, FSLR, LITE, AVGO, RUN
Q3 2025 99$652.1MFSLR, HUT, RUN, ORCL, AVGO
Q2 2025 108$611.9MFLR, NVDA, ANET, ORCL, AVGO
Q1 2025 102$431.7MFLR, AVGO, AGI, CLS, OKTA
Q4 2024 101$516.3MCRM, FLR, ITRI, OSCR, INDV
Q3 2024 109$528.5MOSCR, ITRI, RUN, FLR, CLS
Q2 2024 108$552.7MRUN, FTAI, CLS, ITRI, OSCR
Q1 2024 124$696.1MSPY, RUN, CLS, STKL, ITRI