Ardsley Advisory Partners LP

In its 13F for Q2 2025 (holdings as of June 30, 2025, filed August 14, 2025), Ardsley Advisory Partners LP reported 108 stock positions worth $611.9 million. Its top holding was Fluor (FLR) at 6.7% of the portfolio, followed by Nvidia (NVDA, 3.9%) and Arista Networks (ANET, 3.6%). Compared with Q1 2025, it opened 52 new positions, sold out of 46, added to 35 and reduced 21. The biggest buy was a new position in Arista Networks (ANET) and the biggest sale an exit from Alamos Gold Class A (AGI).

Most Recent 13F
Q2 2026
Location
Norwalk, CT
CIK
0000900529
Portfolio Value
$611.9M (Q2 2025)
SEC Filing
0001172661-25-003308 ↗ filed Aug 14, 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 Q1 2025 Q2 2025: $611.9M $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 108 stocks · $611.9M

FLR Fluor Corp. 6.67% 796,000 $40.8M Add +8.3%
NVDA Nvidia Corp. 3.89% 151,000 $23.8M Add +177.1%
ANET Arista Networks Inc. 3.64% 218,000 $22.3M New
ORCL Oracle Corp. 3.57% 100,000 $21.9M Add +25.0%
AVGO Broadcom Inc. 3.47% 77,000 $21.2M Reduce -41.9%
CLS Celestica Inc. 3.44% 135,000 $21.1M Reduce -27.4%
MSFT Microsoft Corp. 3.41% 42,000 $20.9M Add +259.0%
ARM Arm Holdings PLC-ADR 2.84% 107,500 $17.4M Add +208.5%
AMZN Amazon.com Inc. 2.26% 63,000 $13.8M Add +73.5%
AFRM Affirm Holdings Inc. 2.21% 197,000 $13.5M New
BWXT BWX Technologies Inc. 2.00% 85,000 $12.2M New
HUM Humana Inc. 2.00% 50,000 $12.2M New
NOW ServiceNow Inc. 1.93% 11,500 $11.8M New
NFLX Netflix Inc. 1.86% 8,500 $11.4M Add +16.4%
INDV Indivior Ltd. 1.75% 725,000 $10.7M Add +16.0%
GOOG Alphabet Inc. Class C 1.68% 58,000 $10.3M Add +1833.3%
TEL Te Connectivity PLC 1.64% 59,500 $10.0M Add +83.6%
MIR Mirion Technologies Inc. 1.63% 463,220 $10.0M Add +164.7%
HUT Hut 8 Corp. 1.60% 525,000 $9.8M New
DAVE Dave Inc. 1.54% 35,000 $9.4M New
CIEN Ciena Corp. 1.46% 110,000 $8.9M Add +10.6%
MGNI Magnite Inc. 1.46% 370,000 $8.9M Add +137.2%
SPRY Ars Pharmaceuticals Inc. 1.35% 475,000 $8.3M Add +46.1%
GLW Corning Inc. 1.31% 152,000 $8.0M Add +68.9%
ALDX Aldeyra Therapeutics Inc. 1.28% 2,050,000 $7.9M Add +17.1%
COHR Coherent Corp. 1.27% 87,000 $7.8M Reduce -2.8%
CORZ Core Scientific Inc. 1.26% 450,000 $7.7M Add +12.5%
CVS CVS Health Corp. 1.24% 110,000 $7.6M New
CYBR Cyberark Software Ltd./Israel 1.21% 18,150 $7.4M Add +42.9%
WGS Genedx Holdings Corp. 1.21% 80,000 $7.4M New
GSM Ferroglobe PLC 1.20% 2,007,595 $7.4M Add +11.4%
ADMA Adma Biologics Inc. 1.19% 400,000 $7.3M Add +33.3%
WULF Terawulf Inc. 1.18% 1,650,000 $7.2M Reduce -44.5%
META Meta Platforms Inc. Class A 1.15% 9,500 $7.0M New
NU Nu Holdings Ltd./Cayman Isl-A filed as NU HLDGS LTD 1.12% 500,000 $6.9M New
SHOP Shopify Inc. Class A 1.12% 59,400 $6.9M Add +46.1%
TEVA Teva Pharmaceutical-SP ADR 1.10% 400,000 $6.7M Reduce -20.0%
SGRY Surgery Partners Inc. 1.09% 300,000 $6.7M Add +20.0%
MDT Medtronic PLC 1.00% 70,000 $6.1M New
XIFR XPLR Infrastructure LP 0.98% 730,000 $6.0M Reduce -16.6%
STKL Sunopta Inc. 0.97% 1,020,000 $5.9M Reduce -8.1%
RELY Remitly Global Inc. 0.92% 300,000 $5.6M New
DKNG Draftkings Inc. Class A 0.88% 125,000 $5.4M Reduce -13.8%
ZS Zscaler Inc. 0.82% 16,000 $5.0M New
MELI MercadoLibre Inc. 0.77% 1,800 $4.7M Reduce -65.0%
AEIS Advanced Energy Industries 0.76% 35,000 $4.6M Add +12.9%
SMIN iShares MSCI India Small-Cap 0.76% 60,000 $4.6M New
BIOX Bioceres Crop Solutions Corp. 0.73% 993,614 $4.4M Add +4.7%
PANW Palo Alto Networks Inc. 0.65% 19,500 $4.0M New
STM Stmicroelectronics NV-NY SHS 0.65% 130,000 $4.0M New
RIOT Riot Platforms Inc. 0.60% 325,000 $3.7M New
DNN Denison Mines Corp. 0.59% 2,000,000 $3.6M Add +100.0%
BTSG Brightspring Health Services 0.58% 150,000 $3.5M New
FLEX Flex Ltd. 0.55% 68,000 $3.4M New
LSCC Lattice Semiconductor Corp. 0.52% 65,000 $3.2M Reduce -62.1%
MP MP Materials Corp. 0.52% 95,000 $3.2M Reduce -56.8%
ORN Orion Group Holdings Inc. 0.48% 325,000 $2.9M Add +30.0%
BE Bloom Energy Corp. Class A 0.47% 120,000 $2.9M New
CCJ Cameco Corp. 0.46% 38,000 $2.8M Reduce -49.3%
APP AppLovin Corp. Class A 0.46% 8,000 $2.8M New
AESI Atlas Energy Solutions Inc. 0.44% 200,000 $2.7M New
AMPL Amplitude Inc. Class A 0.43% 210,000 $2.6M Add +55.6%
RUN Sunrun Inc. 0.41% 310,000 $2.5M Reduce -80.5%
FSLR First Solar Inc. 0.41% 15,000 $2.5M Add +200.0%
ADSK Autodesk Inc. 0.40% 8,000 $2.5M Reduce -68.6%
TRIP Tripadvisor Inc. 0.40% 189,000 $2.5M Add +105.4%
HOOD Robinhood Markets Inc. Class A 0.40% 26,000 $2.4M New
PYPL PayPal Holdings Inc. 0.36% 30,000 $2.2M Reduce -9.1%
WNS WNS Holdings Ltd. filed as WNS HLDGS LTD 0.36% 35,000 $2.2M Reduce -2.8%
NOK Nokia Corp.-Spon ADR 0.32% 380,000 $2.0M New
PROF Profound Medical Corp. 0.32% 330,000 $1.9M Add +11.9%
FISV Fiserv Inc. 0.29% 10,300 $1.8M New
CWEN Clearway Energy Inc. Class C 0.29% 55,000 $1.8M Add +10.0%
BOX Box Inc. Class A 0.27% 47,500 $1.6M Add +97.9%
MANH Manhattan Associates Inc. 0.26% 8,200 $1.6M New
RBLX Roblox Corp. Class A 0.26% 15,000 $1.6M New
HASI Ha Sustainable Infrastructur 0.24% 55,000 $1.5M Add +57.1%
TER Teradyne Inc. 0.23% 15,900 $1.4M New
FLS Flowserve Corp. 0.21% 25,000 $1.3M New
SHLS Shoals Technologies Group -A 0.21% 300,000 $1.3M Reduce -14.3%
EVLV Evolv Technologies Holdings 0.20% 200,000 $1.2M New
FIP Ftai Infrastructure Inc. 0.20% 200,000 $1.2M New
BABA Alibaba Group Holding-SP ADR 0.19% 10,000 $1.1M Add +11.1%
TAC Transalta Corp. 0.19% 105,000 $1.1M Reduce -19.2%
OKLO Oklo Inc. 0.18% 20,000 $1.1M New
ACHR Archer Aviation Inc. Class A 0.18% 100,000 $1.1M New
FLNC Fluence Energy Inc. 0.18% 160,000 $1.1M Add +6.7%
AES AES Corp. 0.17% 100,000 $1.1M Reduce -68.3%
PPTA Perpetua Resources Corp. 0.15% 75,000 $911K New
SNX TD Synnex Corp. 0.13% 6,000 $814K New
NRG NRG Energy Inc. 0.13% 5,000 $803K New
PL Planet Labs PBC 0.12% 125,000 $763K New
AIOT Powerfleet Inc. 0.12% 175,000 $754K New
CIFR Cipher Digital Inc. 0.12% 150,000 $717K New
ROG Rogers Corp. 0.11% 10,000 $685K New
TTI Tetra Technologies Inc. 0.10% 175,000 $588K New
SEI Solaris Energy Infrastructur 0.09% 20,000 $566K New
GLBE Global-E Online Ltd. 0.09% 16,000 $537K New
XYZ Block Inc. 0.08% 7,000 $476K New
LEU Centrus Energy Corp. Class A 0.07% 2,500 $458K New
PUBM Pubmatic Inc. Class A 0.07% 35,000 $435K New
PLUG Plug Power Inc. 0.06% 250,000 $373K New
NXE Nexgen Energy Ltd. 0.06% 50,000 $347K New
AMBA Ambarella Inc. 0.05% 5,000 $330K New
GPRE Green Plains Inc. 0.05% 50,000 $302K New
CLNE Clean Energy Fuels Corp. 0.03% 100,000 $195K Reduce -85.7%
ARRY Array Technologies Inc. 0.02% 20,000 $118K Reduce -80.0%
BLDP Ballard Power Systems Inc. 0.01% 50,000 $80K New

Options reported separately and not counted above: MRVL puts ($34.7M), SPY calls ($30.9M), AMD puts ($22.0M), ICLN calls ($5.2M), FSLR calls ($5.0M), ARM calls ($4.0M), FLR calls ($3.8M), MSFT puts ($3.5M), TAN calls ($3.4M), CRWD puts ($3.1M), MU puts ($2.5M), ASML puts ($2.4M), and 25 more.

Portfolio Sells Q1 2025 → Q2 2025

AGI Alamos Gold Inc. Class A Sold out 0.00% −3.41
OKTA Okta Inc. Sold out 0.00% −2.62
FCX Freeport-McMoran Inc. Sold out 0.00% −2.19
RUN Sunrun Inc. Reduce -80.5% 0.41% −1.74
AVGO Broadcom Inc. Reduce -41.9% 3.47% −1.67
BRBR Bellring Brands Inc. Sold out 0.00% −1.64
MU Micron Technology Inc. Sold out 0.00% −1.61
LSCC Lattice Semiconductor Corp. Reduce -62.1% 0.52% −1.56
MELI MercadoLibre Inc. Reduce -65.0% 0.77% −1.56
CRM Salesforce Inc. Sold out 0.00% −1.40
ADSK Autodesk Inc. Reduce -68.6% 0.40% −1.14
AMRC Ameresco Inc. Class A Sold out 0.00% −1.12
MTZ Mastec Inc. Sold out 0.00% −1.08
SLV iShares Silver Trust Sold out 0.00% −1.08
OSCR Oscar Health Inc. Class A Sold out 0.00% −1.06
TEAM Atlassian Corp. Class A Sold out 0.00% −1.05
ITRI Itron Inc. Sold out 0.00% −1.03
SMCI Super Micro Computer Inc. Sold out 0.00% −1.00
CRDO Credo Technology Group Holdi Sold out 0.00% −1.00
XIFR XPLR Infrastructure LP Reduce -16.6% 0.98% −0.95
SITM Sitime Corp. Sold out 0.00% −0.89
PWR Quanta Services Inc. Sold out 0.00% −0.88
TTMI TTM Technologies Sold out 0.00% −0.75
AES AES Corp. Reduce -68.3% 0.17% −0.73
MP MP Materials Corp. Reduce -56.8% 0.52% −0.73
FN Fabrinet Sold out 0.00% −0.72
WULF Terawulf Inc. Reduce -44.5% 1.18% −0.70
P Everpure Inc. Class A Sold out 0.00% −0.70
TEVA Teva Pharmaceutical-SP ADR Reduce -20.0% 1.10% −0.68
COMP Compass Inc. Class A Sold out 0.00% −0.64
CEVA Ceva Inc. Sold out 0.00% −0.63
S Sentinelone Inc. Class A Sold out 0.00% −0.63
ROKU Roku Inc. Sold out 0.00% −0.62
EBAY eBay Inc. Sold out 0.00% −0.60
SPY SS SPDR S&P 500 ETF Trust-US Sold out 0.00% −0.52
GTLS Chart Industries Inc. Sold out 0.00% −0.50
PRIM Primoris Services Corp. Sold out 0.00% −0.47
DOCN Digitalocean Holdings Inc. Sold out 0.00% −0.41
VERX Vertex Inc. Class A Sold out 0.00% −0.38
AOSL Alpha & Omega Semiconductor Sold out 0.00% −0.31
STKL Sunopta Inc. Reduce -8.1% 0.97% −0.28
CHWY Chewy Inc. Class A Sold out 0.00% −0.27
ADBE Adobe Inc. Sold out 0.00% −0.27
URA Global X Uranium ETF Sold out 0.00% −0.27
ZBRA Zebra Technologies Corp. Class A Sold out 0.00% −0.26
CCJ Cameco Corp. Reduce -49.3% 0.46% −0.25
DKNG Draftkings Inc. Class A Reduce -13.8% 0.88% −0.24
CLNE Clean Energy Fuels Corp. Reduce -85.7% 0.03% −0.22
WM Waste Management Inc. Sold out 0.00% −0.21
ALGM Allegro Microsystems Inc. Sold out 0.00% −0.19

Portfolio Buys Q1 2025 → Q2 2025

ANET Arista Networks Inc. New 3.64% +3.64
NVDA Nvidia Corp. Add +177.1% 3.89% +2.53
MSFT Microsoft Corp. Add +259.0% 3.41% +2.40
AFRM Affirm Holdings Inc. New 2.21% +2.21
BWXT BWX Technologies Inc. New 2.00% +2.00
HUM Humana Inc. New 2.00% +2.00
ARM Arm Holdings PLC-ADR Add +208.5% 2.84% +1.98
NOW ServiceNow Inc. New 1.93% +1.93
HUT Hut 8 Corp. New 1.60% +1.60
GOOG Alphabet Inc. Class C Add +1833.3% 1.68% +1.57
DAVE Dave Inc. New 1.54% +1.54
CVS CVS Health Corp. New 1.24% +1.24
WGS Genedx Holdings Corp. New 1.21% +1.21
META Meta Platforms Inc. Class A New 1.15% +1.15
NU Nu Holdings Ltd./Cayman Isl-A New 1.12% +1.12
MGNI Magnite Inc. Add +137.2% 1.46% +1.05
MIR Mirion Technologies Inc. Add +164.7% 1.63% +1.04
MDT Medtronic PLC New 1.00% +1.00
ORCL Oracle Corp. Add +25.0% 3.57% +0.98
RELY Remitly Global Inc. New 0.92% +0.92
ZS Zscaler Inc. New 0.82% +0.82
SMIN iShares MSCI India Small-Cap New 0.76% +0.76
AMZN Amazon.com Inc. Add +73.5% 2.26% +0.66
PANW Palo Alto Networks Inc. New 0.65% +0.65
STM Stmicroelectronics NV-NY SHS New 0.65% +0.65
RIOT Riot Platforms Inc. New 0.60% +0.60
CORZ Core Scientific Inc. Add +12.5% 1.26% +0.58
TEL Te Connectivity PLC Add +83.6% 1.64% +0.58
BTSG Brightspring Health Services New 0.58% +0.58
FLR Fluor Corp. Add +8.3% 6.67% +0.57
FLEX Flex Ltd. New 0.55% +0.55
BE Bloom Energy Corp. Class A New 0.47% +0.47
APP AppLovin Corp. Class A New 0.46% +0.46
AESI Atlas Energy Solutions Inc. New 0.44% +0.44
SPRY Ars Pharmaceuticals Inc. Add +46.1% 1.35% +0.41
HOOD Robinhood Markets Inc. Class A New 0.40% +0.40
INDV Indivior Ltd. Add +16.0% 1.75% +0.37
GLW Corning Inc. Add +68.9% 1.31% +0.35
NOK Nokia Corp.-Spon ADR New 0.32% +0.32
DNN Denison Mines Corp. Add +100.0% 0.59% +0.29
FISV Fiserv Inc. New 0.29% +0.29
NFLX Netflix Inc. Add +16.4% 1.86% +0.28
MANH Manhattan Associates Inc. New 0.26% +0.26
FSLR First Solar Inc. Add +200.0% 0.41% +0.26
RBLX Roblox Corp. Class A New 0.26% +0.26
TER Teradyne Inc. New 0.23% +0.23
SHOP Shopify Inc. Class A Add +46.1% 1.12% +0.22
FLS Flowserve Corp. New 0.21% +0.21
CYBR Cyberark Software Ltd./Israel Add +42.9% 1.21% +0.21
EVLV Evolv Technologies Holdings New 0.20% +0.20

Options Activity Q1 2025 → Q2 2025

MRVL Marvell Technology Inc. put New 448,000 $34.7M
SPY SS SPDR S&P 500 ETF Trust-US call New 50,000 $30.9M
AMD Advanced Micro Devices put New 155,000 $22.0M
ORCL Oracle Corp. call Sold out 70,000 $9.8Mbefore exit
SMCI Super Micro Computer Inc. call Sold out 270,000 $9.2Mbefore exit
TEL Te Connectivity PLC call Sold out 43,000 $6.1Mbefore exit
ICLN iShares Global Clean Energy call Reduce -55.6% 400,000 $5.2M
FSLR First Solar Inc. call Add +200.0% 30,000 $5.0M
AVGO Broadcom Inc. call Sold out 29,100 $4.9Mbefore exit
CLS Celestica Inc. call Sold out 59,000 $4.6Mbefore exit
FLR Fluor Corp. call Add +200.0% 75,000 $3.8M
MSFT Microsoft Corp. put New 7,000 $3.5M
AAPL Apple Inc. put Sold out 15,000 $3.3Mbefore exit
NVDA Nvidia Corp. call Sold out 30,000 $3.3Mbefore exit
CRWD CrowdStrike Holdings Inc. Class A put New 6,000 $3.1M
MGNI Magnite Inc. call Sold out 250,000 $2.9Mbefore exit
DOCS Doximity Inc. Class A put Sold out 45,000 $2.6Mbefore exit
CRDO Credo Technology Group Holdi call Sold out 65,000 $2.6Mbefore exit
MU Micron Technology Inc. put New 20,000 $2.5M
ASML ASML Holding NV-NY Reg SHS put New 3,000 $2.4M
ALDX Aldeyra Therapeutics Inc. call Sold out 400,000 $2.3Mbefore exit
GLW Corning Inc. call Sold out 50,000 $2.3Mbefore exit
HUBS HubSpot Inc. put New 4,000 $2.2M
ACN Accenture PLC Class A put New 7,000 $2.1M
LSCC Lattice Semiconductor Corp. call New 42,000 $2.1M
SMH Vaneck Semiconductor ETF put New 7,000 $2.0M
MSFT Microsoft Corp. call Sold out 5,000 $1.9Mbefore exit
AMRC Ameresco Inc. Class A put Sold out 150,000 $1.8Mbefore exit
LRCX Lam Research Corp. put New 18,000 $1.8M
BOX Box Inc. Class A call New 50,000 $1.7M
RUN Sunrun Inc. call Reduce -69.6% 197,500 $1.6M
UTI Universal Technical Institut put New 45,000 $1.5M
HUT Hut 8 Corp. call New 75,000 $1.4M
WULF Terawulf Inc. call Reduce -40.0% 300,000 $1.3M
CORZ Core Scientific Inc. call New 75,000 $1.3M
NOK Nokia Corp.-Spon ADR call New 240,000 $1.2M
INTA Intapp Inc. put New 20,000 $1.0M
DOCN Digitalocean Holdings Inc. call Sold out 30,000 $1.0Mbefore exit
AMZN Amazon.com Inc. call Sold out 5,000 $951Kbefore exit
XIFR XPLR Infrastructure LP call Sold out 100,000 $950Kbefore exit
CRDO Credo Technology Group Holdi put New 10,000 $926K
CIEN Ciena Corp. call Sold out 15,000 $906Kbefore exit
P Everpure Inc. Class A call Sold out 20,000 $885Kbefore exit
SHLS Shoals Technologies Group -A call New 200,000 $850K
TRIP Tripadvisor Inc. call Reduce -33.3% 60,000 $783K
IOT Samsara Inc. Class A put New 17,000 $676K
ARLO Arlo Technologies Inc. put New 34,000 $577K
TTD Trade Desk Inc./the Class A put New 8,000 $576K
ZETA Zeta Global Holdings Corp. Class A put New 37,000 $573K
ALGM Allegro Microsystems Inc. call Sold out 20,000 $503Kbefore exit

Showing the first 50 of 62.

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