WhaleCreep
HomeFunds › Ardsley Advisory Partners LP

Ardsley Advisory Partners LP: 13F holdings, Q2 2026

Hedge fund · SEC EDGAR filings (CIK 900529) · Explore on the interactive board

Ardsley Advisory Partners LP disclosed 130 US equity positions worth $921.1m in its Q2 2026 13F filing (holdings as of June 30, 2026, filed July 13, 2026). Its largest position is SNDK at 6.2% of the reported book, followed by AMD, SEZL. The top ten holdings are 31.6% of the book, and the portfolio behaves like about 53 equal-weight positions. Versus the prior filing it opened 58 new positions, added to 28, reduced 31 and exited 25. Note: this manager's most recent filing is 3934 quarters behind the newest quarter on file, so these figures are history rather than current positioning.

This manager's most recent filing is 3934 quarter(s) behind the newest quarter on file. Treat these figures as history, not current positioning.
$921.1mreported US equity book
130positions
6.2%largest position
31.6%top 10 weight
53.3effective positions (1/HHI)
2quarters on file since Q1 2026

What does Ardsley Advisory Partners LP own? Top holdings as of June 30, 2026

Change is measured in shares against the previous filing (Q1 2026), so price moves do not read as decisions. This quarter: 58 new, 28 added, 31 reduced, 25 exited.

#StockSectorWeightValueSharesΔ sharesAction
1 SNDK SANDISK CORP Technology 6.2%$56.7m25,000 -40% reduced
2 AMD ADVANCED MICRO DEVICES INC Technology 5.9%$54.0m93,000 1062% added
3 SEZL SEZZLE INC Financial Services 4.0%$36.9m215,000 -28% reduced
4 WULF TERAWULF INC Financial Services 2.6%$23.7m966,000 -8% reduced
5 BTSG BRIGHTSPRING HEALTH SVCS INC Healthcare 2.5%$22.7m325,000 -7% reduced
6 EBAY EBAY INC. Consumer Cyclical 2.4%$22.3m201,000 43% added
7 RUN SUNRUN INC Technology 2.3%$21.4m1,600,000 41% added
8 VIAV VIAVI SOLUTIONS INC Technology 2.0%$18.6m390,000 -3% reduced
9 P EVERPURE INC Technology 2.0%$18.3m233,000 new
10 ARM ARM HOLDINGS PLC Technology 1.8%$16.6m47,000 161% added
11 SHLS SHOALS TECHNOLOGIES GROUP IN Technology 1.8%$16.5m1,665,000 -26% reduced
12 AMZN AMAZON COM INC Consumer Cyclical 1.8%$16.4m69,000 -35% reduced
13 UTHR UNITED THERAPEUTICS CORP DEL Healthcare 1.8%$16.3m30,000 -40% reduced
14 TEVA TEVA PHARMACEUTICAL INDS LTD Healthcare 1.7%$15.8m465,000 -16% reduced
15 GOOG ALPHABET INC Communication Services 1.7%$15.3m43,500 45% added
16 PANW PALO ALTO NETWORKS INC Technology 1.6%$14.6m43,000 new
17 TWLO TWILIO INC Technology 1.5%$14.2m69,000 46% added
18 PRIM PRIMORIS SVCS CORP Industrials 1.5%$13.4m135,000 new
19 AAPL APPLE INC Technology 1.4%$13.0m45,000 new
20 ZM ZOOM COMMUNICATIONS INC Technology 1.4%$12.5m145,000 75% added
21 MOD MODINE MFG CO Consumer Cyclical 1.3%$12.0m45,000 -51% reduced
22 ONTO ONTO INNOVATION INC Technology 1.3%$11.9m31,500 new
23 SNX TD SYNNEX CORPORATION Technology 1.3%$11.6m43,500 new
24 ENPH ENPHASE ENERGY INC Technology 1.2%$10.8m220,000 159% added
25 ALGT ALLEGIANT TRAVEL CO Industrials 1.1%$10.6m90,000 new
26 OKTA OKTA INC Technology 1.1%$10.4m76,500 13% added
27 EQIX EQUINIX INC Real Estate 1.1%$10.4m10,000 26% added
28 HUT HUT 8 CORP Financial Services 1.1%$10.4m90,000 -40% reduced
29 AMLP ALPS ETF TR 1.1%$10.4m200,000 0% held
30 OSCR OSCAR HEALTH INC Healthcare 1.1%$10.0m350,000 new
31 BE BLOOM ENERGY CORP Industrials 1.0%$9.4m31,000 138% added
32 CIFR CIPHER DIGITAL INC Technology 1.0%$9.2m375,000 -17% reduced
33 NU NU HLDGS LTD Financial Services 1.0%$9.0m675,000 0% held
34 CBRS CEREBRAS SYSTEMS INC Technology 0.9%$8.7m39,000 new
35 LITE LUMENTUM HLDGS INC Technology 0.9%$8.5m10,000 61% added
36 RELY REMITLY GLOBAL INC Technology 0.9%$8.4m375,000 new
37 DVN DEVON ENERGY CORP NEW Energy 0.9%$8.3m200,000 new
38 AVGO BROADCOM INC Technology 0.9%$7.9m21,000 -77% reduced
39 ALK ALASKA AIR GROUP INC Industrials 0.9%$7.8m150,000 -9% reduced
40 GLW CORNING INC Technology 0.8%$7.7m30,000 new
41 FLR FLUOR CORP Industrials 0.8%$7.5m142,500 73% added
42 VRTX VERTEX PHARMACEUTICALS INC Healthcare 0.8%$7.5m15,000 new
43 VCYT VERACYTE INC Healthcare 0.8%$7.3m125,000 0% held
44 SMTC SEMTECH CORP Technology 0.8%$7.3m45,000 -83% reduced
45 JAZZ JAZZ PHARMACEUTICALS PLC Healthcare 0.8%$7.2m30,000 new
46 GSM FERROGLOBE PLC Basic Materials 0.8%$6.9m2,185,000 new
47 AKAM AKAMAI TECHNOLOGIES INC Technology 0.7%$6.6m56,000 new
48 VZ VERIZON COMMUNICATIONS INC Communication Services 0.7%$6.6m155,000 19% added
49 BOX BOX INC Technology 0.7%$6.4m240,000 2% added
50 MCHP MICROCHIP TECHNOLOGY INC. Technology 0.7%$6.3m70,000 new

What did Ardsley Advisory Partners LP sell? Positions exited since the previous filing

StockPrior weightPrior value
ANET ARISTA NETWORKS INC13.1%$21.3m
META META PLATFORMS INC9.8%$16.0m
NVDA NVIDIA CORPORATION9.3%$15.3m
BSX BOSTON SCIENTIFIC CORP5.8%$9.4m
AMAT APPLIED MATLS INC5.2%$8.5m
LSCC LATTICE SEMICONDUCTOR CORP4.6%$7.6m
XLU SELECT SECTOR SPDR TR4.2%$6.9m
ADI ANALOG DEVICES INC3.1%$5.1m
MU MICRON TECHNOLOGY INC2.9%$4.7m
LLY ELI LILLY & CO2.8%$4.6m
ATEX ANTERIX INC2.6%$4.2m
ROKU ROKU INC2.4%$3.9m
NFLX NETFLIX INC.2.4%$3.8m
HONGBP HONEYWELL INTL INC2.3%$3.7m
NXE NEXGEN ENERGY LTD2.1%$3.5m
ORA ORMAT TECHNOLOGIES INC2.1%$3.4m
MSFT MICROSOFT CORP1.8%$3.0m
BRBR BELLRING BRANDS INC1.7%$2.8m
INTC INTEL CORP1.4%$2.3m
NET CLOUDFLARE INC1.4%$2.2m
TER TERADYNE INC1.4%$2.2m
RSP INVESCO EXCHANGE TRADED FD T1.3%$2.1m
AMPX AMPRIUS TECHNOLOGIES INC1.3%$2.1m
FTNT FORTINET INC1.3%$2.1m
UPWK UPWORK INC1.3%$2.1m

Sector mix

SectorWeight
Technology49.5%
Healthcare11.5%
Financial Services8.9%
Industrials8.9%
Consumer Cyclical6.9%
Communication Services3.0%

Sectors cover positions whose ticker resolved to a sector; the remainder is unclassified, not cash.

Filing history

QuarterPositionsEquity value
Q2 2026130$921.1m
Q1 2026117$656.4m

How concentrated is Ardsley Advisory Partners LP's portfolio?

Across every quarter Ardsley Advisory Partners LP has filed, its median largest position is 5.3% of the book and its median top-ten weight is 32.5%, which WhaleCreep classifies as concentrated (the gate is a median largest position of 5%). Of 45.0 completed holding spells, the median lasted 1.0 quarters; 130.0 positions are still open and their final length is unknown.