Ardsley Advisory Partners LP

In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 17, 2026), Ardsley Advisory Partners LP reported 113 stock positions worth $785.4 million. Its top holding was Eli Lilly (LLY) at 5.5% of the portfolio, followed by First Solar (FSLR, 3.9%) and Lumentum (LITE, 3.8%). Compared with Q3 2025, it opened 48 new positions, sold out of 34, added to 29 and reduced 33. The biggest buy was a new position in Eli Lilly (LLY) and the biggest sale Oracle (ORCL, shares −65%).

Most Recent 13F
Q2 2026
Location
Norwalk, CT
CIK
0000900529
Portfolio Value
$785.4M (Q4 2025)
SEC Filing
0001172661-26-000864 ↗ filed Feb 17, 2026

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 Q2 2025 Q3 2025: $652.1M Q3 2025 Q4 2025: $785.4M $785.4M Q4 2025 Q1 2026: $656.4M Q1 2026 Q2 2026: $921.1M Q2 2026

Holdings 113 stocks · $785.4M

LLY Eli Lilly & Co. 5.47% 40,000 $43.0M New
FSLR First Solar Inc. 3.91% 117,500 $30.7M Reduce -8.9%
LITE Lumentum Holdings Inc. 3.75% 80,000 $29.5M Reduce -7.0%
AVGO Broadcom Inc. 3.70% 84,000 $29.1M Add +38.8%
RUN Sunrun Inc. 3.47% 1,480,000 $27.2M Reduce -7.5%
NVDA Nvidia Corp. 2.97% 125,000 $23.3M Add +58.2%
ARGX Argenx SE - ADR 2.57% 24,000 $20.2M Add +60.0%
SLV iShares Silver Trust 2.42% 295,000 $19.0M Add +47.5%
TEVA Teva Pharmaceutical-SP ADR 2.30% 580,000 $18.1M Add +16.0%
GOOG Alphabet Inc. Class C 2.28% 57,000 $17.9M Reduce -26.9%
SMTC Semtech Corp. 2.22% 237,000 $17.5M Add +196.3%
TEL Te Connectivity PLC 2.13% 73,500 $16.7M New
HUT Hut 8 Corp. 2.11% 360,000 $16.5M Reduce -55.0%
SEZL Sezzle Inc. 1.98% 245,000 $15.6M New
AEIS Advanced Energy Industries 1.95% 73,000 $15.3M Add +64.0%
WULF Terawulf Inc. 1.70% 1,165,000 $13.4M Reduce -2.9%
SNDK Sandisk Corp. 1.69% 56,000 $13.3M Reduce -44.0%
BTSG Brightspring Health Services 1.67% 350,000 $13.1M Reduce -22.2%
ANET Arista Networks Inc. 1.67% 100,000 $13.1M Add +194.1%
SHOP Shopify Inc. Class A 1.61% 78,400 $12.6M Reduce -5.8%
AMZN Amazon.com Inc. 1.59% 54,000 $12.5M Reduce -28.5%
TER Teradyne Inc. 1.48% 60,000 $11.6M Reduce -31.8%
AGI Alamos Gold Inc. Class A 1.47% 300,000 $11.6M Reduce -7.7%
DNN Denison Mines Corp. 1.39% 4,100,000 $10.9M Add +105.0%
MSFT Microsoft Corp. 1.37% 22,200 $10.7M Reduce -40.0%
NU Nu Holdings Ltd./Cayman Isl-A filed as NU HLDGS LTD 1.36% 640,000 $10.7M Add +2.4%
TXN Texas Instruments Inc. 1.33% 60,000 $10.4M New
NXE Nexgen Energy Ltd. 1.32% 1,125,000 $10.3M Add +350.0%
GSM Ferroglobe PLC 1.25% 2,120,000 $9.8M New
SMIN iShares MSCI India Small-Cap 1.25% 140,000 $9.8M New
TWLO Twilio Inc. Class A 1.13% 62,500 $8.9M New
CRM Salesforce Inc. 1.11% 33,000 $8.7M Add +450.0%
MDB Mongodb Inc. 1.11% 20,750 $8.7M New
JAZZ Jazz Pharmaceuticals PLC 1.08% 50,000 $8.5M New
VIAV Viavi Solutions Inc. 1.00% 440,000 $7.8M New
MIR Mirion Technologies Inc. 0.97% 325,000 $7.6M Reduce -1.0%
ALDX Aldeyra Therapeutics Inc. 0.96% 1,450,000 $7.5M Reduce -23.7%
EBAY eBay Inc. 0.94% 85,000 $7.4M Add +44.1%
PANW Palo Alto Networks Inc. 0.94% 40,000 $7.4M Add +27.8%
WGS Genedx Holdings Corp. 0.91% 55,000 $7.2M Reduce -8.3%
ONTO Onto Innovation Inc. 0.87% 43,500 $6.9M Add +7.4%
SANM Sanmina Corp. 0.86% 45,200 $6.8M New
CVS CVS Health Corp. 0.86% 85,000 $6.7M Reduce -15.0%
BRBR Bellring Brands Inc. 0.82% 240,000 $6.4M New
EOSE Eos Energy Enterprises Inc. 0.81% 555,000 $6.4M Reduce -65.3%
LSCC Lattice Semiconductor Corp. 0.81% 86,000 $6.3M Reduce -24.9%
ORCL Oracle Corp. 0.74% 30,000 $5.8M Reduce -64.7%
RH RH 0.68% 30,000 $5.4M New
VCYT Veracyte Inc. 0.67% 125,000 $5.3M New
CWEN Clearway Energy Inc. Class C 0.64% 150,000 $5.0M Add +20.0%
THC Tenet Healthcare Corp. 0.63% 25,000 $5.0M Reduce -28.6%
OWL Blue Owl Capital Inc. 0.62% 325,000 $4.9M New
XIFR XPLR Infrastructure LP 0.57% 450,000 $4.5M Reduce -48.9%
BE Bloom Energy Corp. Class A 0.56% 51,000 $4.4M Add +920.0%
BWXT BWX Technologies Inc. 0.55% 25,000 $4.3M Reduce -37.5%
XLU St Sr Utl SL SE SPDR ETF-Usd 0.54% 100,000 $4.3M New
ORN Orion Group Holdings Inc. 0.51% 400,000 $4.0M Add +6.7%
BKR Baker Hughes Co. 0.49% 85,000 $3.9M No change
AVY Avery Dennison Corp. 0.49% 21,000 $3.8M New
NOK Nokia Corp.-Spon ADR 0.47% 560,000 $3.7M Add +67.2%
DECK Deckers Outdoor Corp. 0.46% 35,000 $3.6M New
PROF Profound Medical Corp. 0.45% 450,000 $3.5M Add +36.4%
ABNB Airbnb Inc. Class A 0.45% 26,000 $3.5M New
ORA Ormat Technologies Inc. 0.42% 30,000 $3.3M New
MTZ Mastec Inc. 0.42% 15,000 $3.3M Reduce -25.0%
CCJ Cameco Corp. 0.41% 35,000 $3.2M Add +250.0%
FLR Fluor Corp. 0.40% 79,986 $3.2M Reduce -40.8%
NXPI NXP Semiconductors NV 0.40% 14,500 $3.1M New
TE T1 Energy Inc. 0.39% 465,000 $3.1M New
WMB Williams Cos Inc. 0.38% 50,000 $3.0M Reduce -33.3%
WOLF Wolfspeed Inc. 0.37% 165,000 $2.9M New
HAL Halliburton Co. 0.36% 100,000 $2.8M New
STKL Sunopta Inc. 0.33% 690,000 $2.6M Reduce -32.4%
DQ Daqo New Energy Corp.-ADR 0.32% 85,000 $2.5M Reduce -15.0%
MELI MercadoLibre Inc. 0.31% 1,200 $2.4M New
TAC Transalta Corp. 0.29% 180,000 $2.3M Add +56.5%
SLNH Soluna Holdings Inc. 0.26% 1,725,000 $2.0M New
NEE Nextera Energy Inc. 0.26% 25,000 $2.0M New
INTC Intel Corp. 0.24% 51,000 $1.9M Reduce -53.9%
CTSH Cognizant Tech Solutions-A 0.23% 22,000 $1.8M New
NOW ServiceNow Inc. 0.23% 11,850 $1.8M New
HASI Ha Sustainable Infrastructur 0.22% 55,000 $1.7M No change
TRIP Tripadvisor Inc. 0.21% 114,000 $1.7M Add +533.3%
SNAP Snap Inc. Class A 0.21% 200,000 $1.6M New
AFRM Affirm Holdings Inc. 0.20% 21,000 $1.6M Add +5.0%
GLBE Global-E Online Ltd. 0.20% 39,000 $1.5M New
TIC Tic Solutions Inc. 0.19% 150,000 $1.5M Add +200.0%
AMRC Ameresco Inc. Class A 0.19% 50,000 $1.5M No change
EPAM Epam Systems Inc. 0.18% 7,000 $1.4M New
CW Curtiss-Wright Corp. 0.18% 2,500 $1.4M New
EQT Eqt Corp. 0.17% 25,000 $1.3M New
META Meta Platforms Inc. Class A 0.17% 2,000 $1.3M New
ITRI Itron Inc. 0.17% 14,000 $1.3M New
ENPH Enphase Energy Inc. 0.15% 37,500 $1.2M New
PI Impinj Inc. 0.14% 6,500 $1.1M New
COMP Compass Inc. Class A 0.13% 100,000 $1.1M New
ROKU Roku Inc. 0.12% 9,000 $976K Add +12.5%
UEC Uranium Energy Corp. 0.11% 75,000 $876K New
AAOI Applied Optoelectronics Inc. 0.11% 25,000 $872K Reduce -93.1%
SPWR Sunpower Inc. 0.10% 520,000 $816K Add +147.6%
VST Vistra Corp. 0.10% 5,000 $807K New
BIOX Bioceres Crop Solutions Corp. 0.08% 475,000 $622K Add +691.7%
XMTR Xometry Inc. Class A 0.08% 10,000 $595K New
WRBY Warby Parker Inc. Class A 0.07% 26,500 $577K New
NFLX Netflix Inc. 0.07% 6,000 $563K New
METC Ramaco Resources Inc. Class A 0.07% 30,000 $540K Reduce -25.0%
MOD Modine Manufacturing Co. 0.06% 3,600 $481K New
ET Energy Transfer LP 0.05% 25,000 $412K New
ESOA Energy Services of America 0.05% 50,000 $409K Reduce -33.3%
ARRY Array Technologies Inc. 0.03% 25,000 $231K New
AAON Aaon Inc. 0.03% 3,000 $229K Reduce -90.7%
SHLS Shoals Technologies Group -A 0.03% 25,000 $213K Add +25.0%
NFE New Fortress Energy Inc. 0.02% 150,000 $171K New

Options reported separately and not counted above: AVGO calls ($17.3M), ORCL calls ($9.4M), ARM calls ($9.3M), ABNB calls ($7.5M), BKD calls ($7.4M), ICLN calls ($7.4M), TTD puts ($6.3M), PANW calls ($5.3M), ANET calls ($5.2M), TAN calls ($4.9M), CRM calls ($4.8M), DELL puts ($4.5M), and 17 more.

Portfolio Sells Q3 2025 → Q4 2025

ORCL Oracle Corp. Reduce -64.7% 0.74% −2.91
ARM Arm Holdings PLC-ADR Sold out 0.00% −2.34
HUT Hut 8 Corp. Reduce -55.0% 2.11% −2.16
GLW Corning Inc. Sold out 0.00% −2.11
EOSE Eos Energy Enterprises Inc. Reduce -65.3% 0.81% −1.97
SIMO Silicon Motion Technol-ADR Sold out 0.00% −1.93
MSFT Microsoft Corp. Reduce -40.0% 1.37% −1.56
OKTA Okta Inc. Sold out 0.00% −1.49
AAOI Applied Optoelectronics Inc. Reduce -93.1% 0.11% −1.36
RIOT Riot Platforms Inc. Sold out 0.00% −1.31
P Everpure Inc. Class A Sold out 0.00% −1.29
OSCR Oscar Health Inc. Class A Sold out 0.00% −1.09
ADMA Adma Biologics Inc. Sold out 0.00% −0.96
AMZN Amazon.com Inc. Reduce -28.5% 1.59% −0.95
APP AppLovin Corp. Class A Sold out 0.00% −0.88
DKNG Draftkings Inc. Class A Sold out 0.00% −0.83
XIFR XPLR Infrastructure LP Reduce -48.9% 0.57% −0.80
IBM Intl Business Machines Corp. Sold out 0.00% −0.78
RUN Sunrun Inc. Reduce -7.5% 3.47% −0.77
PYPL PayPal Holdings Inc. Sold out 0.00% −0.68
GOOG Alphabet Inc. Class C Reduce -26.9% 2.28% −0.64
FLS Flowserve Corp. Sold out 0.00% −0.61
TSM Taiwan Semiconductor-SP ADR Sold out 0.00% −0.60
STKL Sunopta Inc. Reduce -32.4% 0.33% −0.58
BWXT BWX Technologies Inc. Reduce -37.5% 0.55% −0.58
PD Pagerduty Inc. Sold out 0.00% −0.58
ALDX Aldeyra Therapeutics Inc. Reduce -23.7% 0.96% −0.56
COHR Coherent Corp. Sold out 0.00% −0.55
WDC Western Digital Corp. Sold out 0.00% −0.55
LSCC Lattice Semiconductor Corp. Reduce -24.9% 0.81% −0.48
FLR Fluor Corp. Reduce -40.8% 0.40% −0.47
THC Tenet Healthcare Corp. Reduce -28.6% 0.63% −0.46
FSLR First Solar Inc. Reduce -8.9% 3.91% −0.45
AAON Aaon Inc. Reduce -90.7% 0.03% −0.43
CFLT Confluent Inc. Class A Sold out 0.00% −0.41
WULF Terawulf Inc. Reduce -2.9% 1.70% −0.40
ETSY Etsy Inc. Sold out 0.00% −0.39
TER Teradyne Inc. Reduce -31.8% 1.48% −0.38
BTSG Brightspring Health Services Reduce -22.2% 1.67% −0.37
WMB Williams Cos Inc. Reduce -33.3% 0.38% −0.35
INTC Intel Corp. Reduce -53.9% 0.24% −0.33
CVS CVS Health Corp. Reduce -15.0% 0.86% −0.30
SHOP Shopify Inc. Class A Reduce -5.8% 1.61% −0.29
AGI Alamos Gold Inc. Class A Reduce -7.7% 1.47% −0.26
AES AES Corp. Sold out 0.00% −0.25
MTZ Mastec Inc. Reduce -25.0% 0.42% −0.24
MIR Mirion Technologies Inc. Reduce -1.0% 0.97% −0.20
MGNI Magnite Inc. Sold out 0.00% −0.20
TTI Tetra Technologies Inc. Sold out 0.00% −0.15
DOCU Docusign Inc. Sold out 0.00% −0.14

Portfolio Buys Q3 2025 → Q4 2025

LLY Eli Lilly & Co. New 5.47% +5.47
TEL Te Connectivity PLC New 2.13% +2.13
SEZL Sezzle Inc. New 1.98% +1.98
SMTC Semtech Corp. Add +196.3% 2.22% +1.35
TXN Texas Instruments Inc. New 1.33% +1.33
GSM Ferroglobe PLC New 1.25% +1.25
SMIN iShares MSCI India Small-Cap New 1.25% +1.25
TWLO Twilio Inc. Class A New 1.13% +1.13
SLV iShares Silver Trust Add +47.5% 2.42% +1.12
MDB Mongodb Inc. New 1.11% +1.11
JAZZ Jazz Pharmaceuticals PLC New 1.08% +1.08
VIAV Viavi Solutions Inc. New 1.00% +1.00
NXE Nexgen Energy Ltd. Add +350.0% 1.32% +0.97
ANET Arista Networks Inc. Add +194.1% 1.67% +0.91
CRM Salesforce Inc. Add +450.0% 1.11% +0.89
ARGX Argenx SE - ADR Add +60.0% 2.57% +0.87
SANM Sanmina Corp. New 0.86% +0.86
BRBR Bellring Brands Inc. New 0.82% +0.82
AEIS Advanced Energy Industries Add +64.0% 1.95% +0.79
TEVA Teva Pharmaceutical-SP ADR Add +16.0% 2.30% +0.76
NVDA Nvidia Corp. Add +58.2% 2.97% +0.71
RH RH New 0.68% +0.68
VCYT Veracyte Inc. New 0.67% +0.67
AVGO Broadcom Inc. Add +38.8% 3.70% +0.64
OWL Blue Owl Capital Inc. New 0.62% +0.62
DNN Denison Mines Corp. Add +105.0% 1.39% +0.55
XLU St Sr Utl SL SE SPDR ETF-Usd New 0.54% +0.54
BE Bloom Energy Corp. Class A Add +920.0% 0.56% +0.50
AVY Avery Dennison Corp. New 0.49% +0.49
DECK Deckers Outdoor Corp. New 0.46% +0.46
ABNB Airbnb Inc. Class A New 0.45% +0.45
ORA Ormat Technologies Inc. New 0.42% +0.42
NXPI NXP Semiconductors NV New 0.40% +0.40
TE T1 Energy Inc. New 0.39% +0.39
WOLF Wolfspeed Inc. New 0.37% +0.37
HAL Halliburton Co. New 0.36% +0.36
MELI MercadoLibre Inc. New 0.31% +0.31
CCJ Cameco Corp. Add +250.0% 0.41% +0.28
SLNH Soluna Holdings Inc. New 0.26% +0.26
NEE Nextera Energy Inc. New 0.26% +0.26
CTSH Cognizant Tech Solutions-A New 0.23% +0.23
NOW ServiceNow Inc. New 0.23% +0.23
NOK Nokia Corp.-Spon ADR Add +67.2% 0.47% +0.22
SNAP Snap Inc. Class A New 0.21% +0.21
PROF Profound Medical Corp. Add +36.4% 0.45% +0.20
GLBE Global-E Online Ltd. New 0.20% +0.20
EPAM Epam Systems Inc. New 0.18% +0.18
CW Curtiss-Wright Corp. New 0.18% +0.18
EQT Eqt Corp. New 0.17% +0.17
META Meta Platforms Inc. Class A New 0.17% +0.17

Options Activity Q3 2025 → Q4 2025

AVGO Broadcom Inc. call Add +66.7% 50,000 $17.3M
GOOG Alphabet Inc. Class C call Sold out 70,000 $17.0Mbefore exit
HUT Hut 8 Corp. call Sold out 275,000 $9.6Mbefore exit
ORCL Oracle Corp. call Add +220.0% 48,000 $9.4M
ARM Arm Holdings PLC-ADR call Add +325.0% 85,000 $9.3M
ABNB Airbnb Inc. Class A call New 55,000 $7.5M
BKD Brookdale Senior Living Inc. call New 690,000 $7.4M
ICLN iShares Global Clean Energy call Reduce -30.8% 450,000 $7.4M
TTD Trade Desk Inc./the Class A put New 165,000 $6.3M
APH Amphenol Corp. Class A put Sold out 45,000 $5.6Mbefore exit
PANW Palo Alto Networks Inc. call New 29,000 $5.3M
ANET Arista Networks Inc. call New 40,000 $5.2M
CRM Salesforce Inc. call Reduce -33.3% 18,000 $4.8M
DELL Dell Technologies -C put New 36,000 $4.5M
DQ Daqo New Energy Corp.-ADR call Reduce -25.0% 150,000 $4.4M
AAOI Applied Optoelectronics Inc. call Sold out 165,000 $4.3Mbefore exit
MGNI Magnite Inc. call Sold out 195,000 $4.2Mbefore exit
NOW ServiceNow Inc. call New 26,500 $4.1M
ADI Analog Devices Inc. put Sold out 15,000 $3.7Mbefore exit
KWEB Kranesh Csi China Internet call New 100,000 $3.4M
PDD PDD Holdings Inc. call Sold out 25,000 $3.3Mbefore exit
CFLT Confluent Inc. Class A call Sold out 160,000 $3.2Mbefore exit
SANM Sanmina Corp. call New 20,000 $3.0M
PD Pagerduty Inc. call Sold out 170,000 $2.8Mbefore exit
ALAB Astera Labs Inc. put Sold out 14,000 $2.7Mbefore exit
FSLR First Solar Inc. call New 10,000 $2.6M
ONTO Onto Innovation Inc. call New 15,000 $2.4M
INTC Intel Corp. call New 60,000 $2.2M
RUN Sunrun Inc. call Sold out 125,000 $2.2Mbefore exit
NFLX Netflix Inc. call New 23,000 $2.2M
SNAP Snap Inc. Class A call New 230,000 $1.9M
SMR Nuscale Power Corp. put Sold out 50,000 $1.8Mbefore exit
GLW Corning Inc. put New 20,000 $1.8M
P Everpure Inc. Class A call Sold out 20,000 $1.7Mbefore exit
SMTC Semtech Corp. call Reduce -45.0% 22,000 $1.6M
CRDO Credo Technology Group Holdi put Sold out 10,000 $1.5Mbefore exit
TRIP Tripadvisor Inc. call Reduce -23.1% 100,000 $1.5M
COHR Coherent Corp. put Reduce -79.4% 7,000 $1.3M
CLNE Clean Energy Fuels Corp. call Sold out 500,000 $1.3Mbefore exit
PTON Peloton Interactive Inc. Class A call Sold out 100,000 $900Kbefore exit
MRVL Marvell Technology Inc. put Reduce -97.6% 10,000 $850K
NKE Nike Inc. Class B call Sold out 10,000 $697Kbefore exit
ZETA Zeta Global Holdings Corp. Class A put Sold out 35,000 $695Kbefore exit
SEZL Sezzle Inc. call New 10,000 $635K
ALDX Aldeyra Therapeutics Inc. call New 50,000 $259K
ON On Semiconductor put Sold out 5,000 $247Kbefore exit

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