Ardsley Advisory Partners LP

In its 13F for Q2 2026 (holdings as of June 30, 2026, filed July 13, 2026), Ardsley Advisory Partners LP reported 130 stock positions worth $921.1 million. Its top holding was Sandisk (SNDK) at 6.2% of the portfolio, followed by Advanced Micro Devices (AMD, 5.9%) and Sezzle (SEZL, 4.0%). Compared with Q1 2026, it opened 58 new positions, sold out of 45, added to 28 and reduced 31. The biggest buy was Advanced Micro Devices (AMD, shares +1063%) and the biggest sale Broadcom (AVGO, shares −77%).

Most Recent 13F
Q2 2026
Location
Norwalk, CT
CIK
0000900529
Portfolio Value
$921.1M (Q2 2026)
SEC Filing
0001172661-26-002590 ↗ filed Jul 13, 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 Q4 2025 Q1 2026: $656.4M Q1 2026 Q2 2026: $921.1M $921.1M Q2 2026

Holdings 130 stocks · $921.1M

SNDK Sandisk Corp. 6.15% 25,000 $56.7M Reduce -40.5%
AMD Advanced Micro Devices 5.87% 93,000 $54.0M Add +1062.5%
SEZL Sezzle Inc. 4.01% 215,000 $36.9M Reduce -28.3%
WULF Terawulf Inc. 2.57% 966,000 $23.7M Reduce -8.0%
BTSG Brightspring Health Services 2.46% 325,000 $22.7M Reduce -7.1%
EBAY eBay Inc. 2.42% 201,000 $22.3M Add +43.1%
RUN Sunrun Inc. 2.32% 1,600,000 $21.4M Add +41.0%
VIAV Viavi Solutions Inc. 2.02% 390,000 $18.6M Reduce -2.5%
P Everpure Inc. Class A 1.99% 233,000 $18.3M New
ARM Arm Holdings PLC-ADR 1.80% 47,000 $16.6M Add +161.1%
SHLS Shoals Technologies Group -A 1.79% 1,665,000 $16.5M Reduce -26.3%
AMZN Amazon.com Inc. 1.79% 69,000 $16.4M Reduce -34.9%
UTHR United Therapeutics Corp. 1.76% 30,000 $16.3M Reduce -40.0%
TEVA Teva Pharmaceutical-SP ADR 1.71% 465,000 $15.8M Reduce -16.2%
GOOG Alphabet Inc. Class C 1.67% 43,500 $15.3M Add +45.0%
PANW Palo Alto Networks Inc. 1.59% 43,000 $14.6M New
TWLO Twilio Inc. Class A 1.55% 69,000 $14.2M Add +46.2%
PRIM Primoris Services Corp. 1.45% 135,000 $13.4M New
AAPL Apple Inc. 1.41% 45,000 $13.0M New
ZM Zoom Communications Inc. 1.36% 145,000 $12.5M Add +74.7%
MOD Modine Manufacturing Co. 1.30% 45,000 $12.0M Reduce -50.6%
ONTO Onto Innovation Inc. 1.29% 31,500 $11.9M New
SNX TD Synnex Corp. 1.26% 43,500 $11.6M New
ENPH Enphase Energy Inc. 1.17% 220,000 $10.8M Add +158.8%
ALGT Allegiant Travel Co. 1.15% 90,000 $10.6M New
OKTA Okta Inc. 1.13% 76,500 $10.4M Add +13.2%
EQIX Equinix Inc. 1.13% 10,000 $10.4M Add +25.8%
HUT Hut 8 Corp. 1.13% 90,000 $10.4M Reduce -40.0%
AMLP Alerian MLP ETF 1.13% 200,000 $10.4M No change
OSCR Oscar Health Inc. Class A 1.08% 350,000 $10.0M New
BE Bloom Energy Corp. Class A 1.02% 31,000 $9.4M Add +138.5%
CIFR Cipher Digital Inc. 1.00% 375,000 $9.2M Reduce -16.7%
NU Nu Holdings Ltd./Cayman Isl-A filed as NU HLDGS LTD 0.98% 675,000 $9.0M No change
CBRS Cerebras Systems Inc. Class A 0.94% 39,000 $8.7M New
LITE Lumentum Holdings Inc. 0.93% 10,000 $8.5M Add +61.3%
RELY Remitly Global Inc. 0.91% 375,000 $8.4M New
DVN Devon Energy Corp. 0.90% 200,000 $8.3M New
AVGO Broadcom Inc. 0.86% 21,000 $7.9M Reduce -76.5%
ALK Alaska Air Group Inc. 0.85% 150,000 $7.8M Reduce -9.1%
GLW Corning Inc. 0.83% 30,000 $7.7M New
FLR Fluor Corp. 0.81% 142,500 $7.5M Add +72.7%
VRTX Vertex Pharmaceuticals Inc. 0.81% 15,000 $7.5M New
VCYT Veracyte Inc. 0.80% 125,000 $7.3M No change
SMTC Semtech Corp. 0.79% 45,000 $7.3M Reduce -82.6%
JAZZ Jazz Pharmaceuticals PLC 0.78% 30,000 $7.2M New
GSM Ferroglobe PLC 0.75% 2,185,000 $6.9M New
AKAM Akamai Technologies Inc. 0.72% 56,000 $6.6M New
VZ Verizon Communications Inc. 0.71% 155,000 $6.6M Add +19.2%
BOX Box Inc. Class A 0.69% 240,000 $6.4M Add +1.7%
MCHP Microchip Technology Inc. 0.69% 70,000 $6.3M New
SLB SLB Ltd. filed as SLB LIMITED 0.68% 135,000 $6.3M New
XIFR XPLR Infrastructure LP 0.67% 525,000 $6.2M Add +10.5%
CAMT Camtek Ltd. 0.66% 37,000 $6.0M New
MIR Mirion Technologies Inc. 0.63% 325,000 $5.8M No change
CRM Salesforce Inc. 0.61% 36,000 $5.6M New
GMTL Guardian Metal Resources 0.61% 400,000 $5.6M New
WGS Genedx Holdings Corp. 0.56% 75,000 $5.1M Reduce -25.0%
AAOI Applied Optoelectronics Inc. 0.56% 35,000 $5.1M New
ADMA Adma Biologics Inc. 0.55% 600,000 $5.0M Add +41.2%
CWEN Clearway Energy Inc. Class C 0.52% 140,000 $4.8M No change
TAC Transalta Corp. 0.52% 345,000 $4.8M Add +25.4%
PI Impinj Inc. 0.51% 33,000 $4.7M Add +187.0%
BWA Borgwarner Inc. 0.50% 70,000 $4.6M New
NAVN Navan Inc. Class A 0.50% 200,000 $4.6M New
GFS Globalfoundries Inc. 0.49% 54,500 $4.5M New
FLS Flowserve Corp. 0.48% 60,000 $4.4M New
FCEL Fuelcell Energy Inc. 0.47% 120,000 $4.4M Add +166.7%
LRCX Lam Research Corp. 0.47% 10,000 $4.3M New
CVS CVS Health Corp. 0.45% 40,000 $4.1M Reduce -52.9%
MANH Manhattan Associates Inc. 0.43% 28,500 $4.0M New
GLBE Global-E Online Ltd. 0.43% 113,000 $3.9M New
BWXT BWX Technologies Inc. 0.42% 20,000 $3.9M Reduce -20.0%
APH Amphenol Corp. Class A 0.42% 22,000 $3.9M New
TXN Texas Instruments Inc. 0.42% 13,000 $3.9M Add +116.7%
SKE Skeena Resources Ltd. 0.42% 145,000 $3.9M Reduce -17.1%
PROF Profound Medical Corp. 0.42% 575,000 $3.8M No change
WMB Williams Cos Inc. 0.40% 50,000 $3.7M No change
SHOP Shopify Inc. Class A 0.40% 32,500 $3.7M New
WDC Western Digital Corp. 0.38% 5,500 $3.5M New
AEVA Aeva Technologies Inc. 0.38% 121,500 $3.5M New
ORN Orion Group Holdings Inc. 0.37% 200,000 $3.4M No change
TIC Tic Solutions Inc. 0.35% 400,000 $3.2M Add +6.7%
EOSE Eos Energy Enterprises Inc. 0.35% 550,000 $3.2M Add +83.3%
AGI Alamos Gold Inc. Class A 0.35% 105,000 $3.2M Reduce -40.0%
COHU Cohu Inc. 0.33% 41,700 $3.1M New
FLEX Flex Ltd. 0.33% 19,000 $3.1M New
FTRE Fortrea Holdings Inc. 0.33% 175,000 $3.0M New
STM Stmicroelectronics NV-NY SHS 0.33% 41,000 $3.0M New
WOLF Wolfspeed Inc. 0.31% 60,000 $2.9M Reduce -57.1%
VECO Veeco Instruments Inc. 0.30% 37,000 $2.8M New
KBR KBR Inc. 0.28% 75,000 $2.6M New
ET Energy Transfer LP 0.26% 125,000 $2.4M Add +66.7%
PGY Pagaya Technologies Ltd. Class A 0.25% 125,000 $2.3M New
TRIP Tripadvisor Inc. 0.25% 166,000 $2.3M New
HASI Ha Sustainable Infrastructur 0.23% 55,000 $2.1M No change
NOW ServiceNow Inc. 0.23% 21,500 $2.1M Reduce -70.3%
ALDX Aldeyra Therapeutics Inc. 0.23% 975,000 $2.1M Add +2.6%
S Sentinelone Inc. Class A 0.22% 118,000 $2.0M Add +156.5%
AVY Avery Dennison Corp. 0.21% 12,000 $1.9M Reduce -70.0%
BKR Baker Hughes Co. 0.21% 35,000 $1.9M New

Show all 130 holdings

Options reported separately and not counted above: BKD calls ($11.1M), ORCL calls ($6.6M), FCEL calls ($4.5M), NOW calls ($3.0M), TEAM calls ($2.7M), P calls ($2.4M), CTSH puts ($1.9M), CSGP puts ($1.4M), AEVA calls ($1.3M), ZM calls ($1.1M), HIMX calls ($1.1M), KFY puts ($666K), and 3 more.

Portfolio Sells Q1 2026 → Q2 2026

AVGO Broadcom Inc. Reduce -76.5% 0.86% −3.36
ANET Arista Networks Inc. Sold out 0.00% −3.25
UTHR United Therapeutics Corp. Reduce -40.0% 1.76% −2.75
META Meta Platforms Inc. Class A Sold out 0.00% −2.44
NVDA Nvidia Corp. Sold out 0.00% −2.32
SMTC Semtech Corp. Reduce -82.6% 0.79% −2.24
MOD Modine Manufacturing Co. Reduce -50.6% 1.30% −1.70
AMZN Amazon.com Inc. Reduce -34.9% 1.79% −1.58
BSX Boston Scientific Corp. Sold out 0.00% −1.43
AMAT Applied Materials Inc. Sold out 0.00% −1.30
LSCC Lattice Semiconductor Corp. Sold out 0.00% −1.15
XLU St Sr Utl SL SE SPDR ETF-Usd Sold out 0.00% −1.05
NOW ServiceNow Inc. Reduce -70.3% 0.23% −0.92
AVY Avery Dennison Corp. Reduce -70.0% 0.21% −0.84
AGI Alamos Gold Inc. Class A Reduce -40.0% 0.35% −0.84
TEVA Teva Pharmaceutical-SP ADR Reduce -16.2% 1.71% −0.84
ADI Analog Devices Inc. Sold out 0.00% −0.78
MU Micron Technology Inc. Sold out 0.00% −0.72
LLY Eli Lilly & Co. Sold out 0.00% −0.70
ATEX Anterix Inc. Sold out 0.00% −0.64
DNN Denison Mines Corp. Reduce -71.4% 0.13% −0.62
ROKU Roku Inc. Sold out 0.00% −0.60
NFLX Netflix Inc. Sold out 0.00% −0.59
HON Honeywell International Inc. Sold out 0.00% −0.57
NXE Nexgen Energy Ltd. Sold out 0.00% −0.53
BKD Brookdale Senior Living Inc. Sold out 0.00% −0.52
ORA Ormat Technologies Inc. Sold out 0.00% −0.51
CVS CVS Health Corp. Reduce -52.9% 0.45% −0.48
SHLS Shoals Technologies Group -A Reduce -26.3% 1.79% −0.48
MSFT Microsoft Corp. Sold out 0.00% −0.45
BRBR Bellring Brands Inc. Sold out 0.00% −0.43
WGS Genedx Holdings Corp. Reduce -25.0% 0.56% −0.42
SKE Skeena Resources Ltd. Reduce -17.1% 0.42% −0.37
INTC Intel Corp. Sold out 0.00% −0.36
BWXT BWX Technologies Inc. Reduce -20.0% 0.42% −0.36
FLNC Fluence Energy Inc. Reduce -89.2% 0.04% −0.34
NET Cloudflare Inc. Class A Sold out 0.00% −0.34
TER Teradyne Inc. Sold out 0.00% −0.34
RSP Invesco S&P 500 Equal Weight Sold out 0.00% −0.32
AMPX Amprius Technologies Inc. Sold out 0.00% −0.32
FTNT Fortinet Inc. Sold out 0.00% −0.32
UPWK Upwork Inc. Sold out 0.00% −0.32
FFIV F5 Inc. Sold out 0.00% −0.31
DIOD Diodes Inc. Sold out 0.00% −0.31
UBER Uber Technologies Inc. Sold out 0.00% −0.27
AEIS Advanced Energy Industries Sold out 0.00% −0.25
MTZ Mastec Inc. Sold out 0.00% −0.25
EQT Eqt Corp. Sold out 0.00% −0.24
METC Ramaco Resources Inc. Class A Reduce -37.5% 0.14% −0.23
DT Dynatrace Inc. Sold out 0.00% −0.23

Portfolio Buys Q1 2026 → Q2 2026

AMD Advanced Micro Devices Add +1062.5% 5.87% +5.62
P Everpure Inc. Class A New 1.99% +1.99
PANW Palo Alto Networks Inc. New 1.59% +1.59
PRIM Primoris Services Corp. New 1.45% +1.45
AAPL Apple Inc. New 1.41% +1.41
ARM Arm Holdings PLC-ADR Add +161.1% 1.80% +1.39
ONTO Onto Innovation Inc. New 1.29% +1.29
SNX TD Synnex Corp. New 1.26% +1.26
ALGT Allegiant Travel Co. New 1.15% +1.15
OSCR Oscar Health Inc. Class A New 1.08% +1.08
CBRS Cerebras Systems Inc. Class A New 0.94% +0.94
RELY Remitly Global Inc. New 0.91% +0.91
DVN Devon Energy Corp. New 0.90% +0.90
GLW Corning Inc. New 0.83% +0.83
VRTX Vertex Pharmaceuticals Inc. New 0.81% +0.81
JAZZ Jazz Pharmaceuticals PLC New 0.78% +0.78
GSM Ferroglobe PLC New 0.75% +0.75
BE Bloom Energy Corp. Class A Add +138.5% 1.02% +0.75
AKAM Akamai Technologies Inc. New 0.72% +0.72
MCHP Microchip Technology Inc. New 0.69% +0.69
SLB SLB Ltd. New 0.68% +0.68
ENPH Enphase Energy Inc. Add +158.8% 1.17% +0.68
CAMT Camtek Ltd. New 0.66% +0.66
TWLO Twilio Inc. Class A Add +46.2% 1.55% +0.64
CRM Salesforce Inc. New 0.61% +0.61
GMTL Guardian Metal Resources New 0.61% +0.61
AAOI Applied Optoelectronics Inc. New 0.56% +0.56
BWA Borgwarner Inc. New 0.50% +0.50
NAVN Navan Inc. Class A New 0.50% +0.50
GFS Globalfoundries Inc. New 0.49% +0.49
FLS Flowserve Corp. New 0.48% +0.48
LRCX Lam Research Corp. New 0.47% +0.47
EBAY eBay Inc. Add +43.1% 2.42% +0.47
MANH Manhattan Associates Inc. New 0.43% +0.43
FCEL Fuelcell Energy Inc. Add +166.7% 0.47% +0.43
GLBE Global-E Online Ltd. New 0.43% +0.43
APH Amphenol Corp. Class A New 0.42% +0.42
SHOP Shopify Inc. Class A New 0.40% +0.40
WDC Western Digital Corp. New 0.38% +0.38
AEVA Aeva Technologies Inc. New 0.38% +0.38
GOOG Alphabet Inc. Class C Add +45.0% 1.67% +0.36
ZM Zoom Communications Inc. Add +74.7% 1.36% +0.34
COHU Cohu Inc. New 0.33% +0.33
FLEX Flex Ltd. New 0.33% +0.33
PI Impinj Inc. Add +187.0% 0.51% +0.33
FTRE Fortrea Holdings Inc. New 0.33% +0.33
STM Stmicroelectronics NV-NY SHS New 0.33% +0.33
OKTA Okta Inc. Add +13.2% 1.13% +0.32
VECO Veeco Instruments Inc. New 0.30% +0.30
KBR KBR Inc. New 0.28% +0.28

Options Activity Q1 2026 → Q2 2026

SPY SS SPDR S&P 500 ETF Trust-US call Sold out 49,000 $31.9Mbefore exit
AVGO Broadcom Inc. call Sold out 50,000 $15.5Mbefore exit
AMZN Amazon.com Inc. call Sold out 48,000 $10.0Mbefore exit
SNDK Sandisk Corp. call Sold out 13,000 $8.3Mbefore exit
AAPL Apple Inc. put Sold out 30,000 $7.6Mbefore exit
ORCL Oracle Corp. call New 45,000 $6.6M
MU Micron Technology Inc. call Sold out 17,000 $5.7Mbefore exit
FCEL Fuelcell Energy Inc. call New 125,000 $4.5M
EQIX Equinix Inc. call Sold out 4,000 $3.9Mbefore exit
HPE Hewlett Packard Enterprise put Sold out 155,000 $3.7Mbefore exit
ANET Arista Networks Inc. call Sold out 25,000 $3.1Mbefore exit
DOCN Digitalocean Holdings Inc. put Sold out 35,000 $3.0Mbefore exit
NOW ServiceNow Inc. call Add +150.0% 30,000 $3.0M
TEAM Atlassian Corp. Class A call New 35,000 $2.7M
COHR Coherent Corp. put Sold out 10,000 $2.4Mbefore exit
BOX Box Inc. Class A call Sold out 100,000 $2.4Mbefore exit
P Everpure Inc. Class A call New 30,000 $2.4M
SMTC Semtech Corp. call Sold out 30,000 $2.3Mbefore exit
FTNT Fortinet Inc. call Sold out 25,000 $2.0Mbefore exit
CTSH Cognizant Tech Solutions-A put New 50,000 $1.9M
NVDA Nvidia Corp. call Sold out 10,000 $1.7Mbefore exit
CSGP Costar Group Inc. put New 50,000 $1.4M
AEVA Aeva Technologies Inc. call New 45,000 $1.3M
MOS The Mosaic Co. call Sold out 50,000 $1.3Mbefore exit
TASK Taskus Inc. Class A call Sold out 170,000 $1.1Mbefore exit
ZM Zoom Communications Inc. call Reduce -43.5% 13,000 $1.1M
CNXC Concentrix Corp. put Sold out 40,000 $1.1Mbefore exit
HIMX Himax Technologies Inc.-ADR call Reduce -12.5% 70,000 $1.1M
DQ Daqo New Energy Corp.-ADR call Sold out 50,000 $1.1Mbefore exit
XLF SS Financial Select Sector call Sold out 20,000 $987Kbefore exit
INTC Intel Corp. call Sold out 18,000 $794Kbefore exit
MGNI Magnite Inc. call Sold out 65,000 $772Kbefore exit
EXLS Exlservice Holdings Inc. put Sold out 25,000 $761Kbefore exit
RAMP Liveramp Holdings Inc. call Sold out 28,000 $743Kbefore exit
KFY Korn Ferry put New 10,000 $666K
LSCC Lattice Semiconductor Corp. call Sold out 7,000 $649Kbefore exit
TWLO Twilio Inc. Class A call Sold out 5,000 $629Kbefore exit
AXTI Axt Inc. call New 8,000 $577K
OKTA Okta Inc. call Sold out 5,000 $394Kbefore exit
TDC Teradata Corp. call Sold out 10,000 $256Kbefore exit
SNAP Snap Inc. Class A call Sold out 50,000 $230Kbefore exit
DSP Viant Technology Inc. Class A call New 12,500 $158K

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