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.
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.
| # | Stock | Sector | Weight | Value | Shares | Δ shares | Action |
|---|---|---|---|---|---|---|---|
| 1 | SNDK SANDISK CORP | Technology | 6.2% | $56.7m | 25,000 | -40% | reduced |
| 2 | AMD ADVANCED MICRO DEVICES INC | Technology | 5.9% | $54.0m | 93,000 | 1062% | added |
| 3 | SEZL SEZZLE INC | Financial Services | 4.0% | $36.9m | 215,000 | -28% | reduced |
| 4 | WULF TERAWULF INC | Financial Services | 2.6% | $23.7m | 966,000 | -8% | reduced |
| 5 | BTSG BRIGHTSPRING HEALTH SVCS INC | Healthcare | 2.5% | $22.7m | 325,000 | -7% | reduced |
| 6 | EBAY EBAY INC. | Consumer Cyclical | 2.4% | $22.3m | 201,000 | 43% | added |
| 7 | RUN SUNRUN INC | Technology | 2.3% | $21.4m | 1,600,000 | 41% | added |
| 8 | VIAV VIAVI SOLUTIONS INC | Technology | 2.0% | $18.6m | 390,000 | -3% | reduced |
| 9 | P EVERPURE INC | Technology | 2.0% | $18.3m | 233,000 | – | new |
| 10 | ARM ARM HOLDINGS PLC | Technology | 1.8% | $16.6m | 47,000 | 161% | added |
| 11 | SHLS SHOALS TECHNOLOGIES GROUP IN | Technology | 1.8% | $16.5m | 1,665,000 | -26% | reduced |
| 12 | AMZN AMAZON COM INC | Consumer Cyclical | 1.8% | $16.4m | 69,000 | -35% | reduced |
| 13 | UTHR UNITED THERAPEUTICS CORP DEL | Healthcare | 1.8% | $16.3m | 30,000 | -40% | reduced |
| 14 | TEVA TEVA PHARMACEUTICAL INDS LTD | Healthcare | 1.7% | $15.8m | 465,000 | -16% | reduced |
| 15 | GOOG ALPHABET INC | Communication Services | 1.7% | $15.3m | 43,500 | 45% | added |
| 16 | PANW PALO ALTO NETWORKS INC | Technology | 1.6% | $14.6m | 43,000 | – | new |
| 17 | TWLO TWILIO INC | Technology | 1.5% | $14.2m | 69,000 | 46% | added |
| 18 | PRIM PRIMORIS SVCS CORP | Industrials | 1.5% | $13.4m | 135,000 | – | new |
| 19 | AAPL APPLE INC | Technology | 1.4% | $13.0m | 45,000 | – | new |
| 20 | ZM ZOOM COMMUNICATIONS INC | Technology | 1.4% | $12.5m | 145,000 | 75% | added |
| 21 | MOD MODINE MFG CO | Consumer Cyclical | 1.3% | $12.0m | 45,000 | -51% | reduced |
| 22 | ONTO ONTO INNOVATION INC | Technology | 1.3% | $11.9m | 31,500 | – | new |
| 23 | SNX TD SYNNEX CORPORATION | Technology | 1.3% | $11.6m | 43,500 | – | new |
| 24 | ENPH ENPHASE ENERGY INC | Technology | 1.2% | $10.8m | 220,000 | 159% | added |
| 25 | ALGT ALLEGIANT TRAVEL CO | Industrials | 1.1% | $10.6m | 90,000 | – | new |
| 26 | OKTA OKTA INC | Technology | 1.1% | $10.4m | 76,500 | 13% | added |
| 27 | EQIX EQUINIX INC | Real Estate | 1.1% | $10.4m | 10,000 | 26% | added |
| 28 | HUT HUT 8 CORP | Financial Services | 1.1% | $10.4m | 90,000 | -40% | reduced |
| 29 | AMLP ALPS ETF TR | 1.1% | $10.4m | 200,000 | 0% | held | |
| 30 | OSCR OSCAR HEALTH INC | Healthcare | 1.1% | $10.0m | 350,000 | – | new |
| 31 | BE BLOOM ENERGY CORP | Industrials | 1.0% | $9.4m | 31,000 | 138% | added |
| 32 | CIFR CIPHER DIGITAL INC | Technology | 1.0% | $9.2m | 375,000 | -17% | reduced |
| 33 | NU NU HLDGS LTD | Financial Services | 1.0% | $9.0m | 675,000 | 0% | held |
| 34 | CBRS CEREBRAS SYSTEMS INC | Technology | 0.9% | $8.7m | 39,000 | – | new |
| 35 | LITE LUMENTUM HLDGS INC | Technology | 0.9% | $8.5m | 10,000 | 61% | added |
| 36 | RELY REMITLY GLOBAL INC | Technology | 0.9% | $8.4m | 375,000 | – | new |
| 37 | DVN DEVON ENERGY CORP NEW | Energy | 0.9% | $8.3m | 200,000 | – | new |
| 38 | AVGO BROADCOM INC | Technology | 0.9% | $7.9m | 21,000 | -77% | reduced |
| 39 | ALK ALASKA AIR GROUP INC | Industrials | 0.9% | $7.8m | 150,000 | -9% | reduced |
| 40 | GLW CORNING INC | Technology | 0.8% | $7.7m | 30,000 | – | new |
| 41 | FLR FLUOR CORP | Industrials | 0.8% | $7.5m | 142,500 | 73% | added |
| 42 | VRTX VERTEX PHARMACEUTICALS INC | Healthcare | 0.8% | $7.5m | 15,000 | – | new |
| 43 | VCYT VERACYTE INC | Healthcare | 0.8% | $7.3m | 125,000 | 0% | held |
| 44 | SMTC SEMTECH CORP | Technology | 0.8% | $7.3m | 45,000 | -83% | reduced |
| 45 | JAZZ JAZZ PHARMACEUTICALS PLC | Healthcare | 0.8% | $7.2m | 30,000 | – | new |
| 46 | GSM FERROGLOBE PLC | Basic Materials | 0.8% | $6.9m | 2,185,000 | – | new |
| 47 | AKAM AKAMAI TECHNOLOGIES INC | Technology | 0.7% | $6.6m | 56,000 | – | new |
| 48 | VZ VERIZON COMMUNICATIONS INC | Communication Services | 0.7% | $6.6m | 155,000 | 19% | added |
| 49 | BOX BOX INC | Technology | 0.7% | $6.4m | 240,000 | 2% | added |
| 50 | MCHP MICROCHIP TECHNOLOGY INC. | Technology | 0.7% | $6.3m | 70,000 | – | new |
What did Ardsley Advisory Partners LP sell? Positions exited since the previous filing
| Stock | Prior weight | Prior value |
|---|---|---|
| ANET ARISTA NETWORKS INC | 13.1% | $21.3m |
| META META PLATFORMS INC | 9.8% | $16.0m |
| NVDA NVIDIA CORPORATION | 9.3% | $15.3m |
| BSX BOSTON SCIENTIFIC CORP | 5.8% | $9.4m |
| AMAT APPLIED MATLS INC | 5.2% | $8.5m |
| LSCC LATTICE SEMICONDUCTOR CORP | 4.6% | $7.6m |
| XLU SELECT SECTOR SPDR TR | 4.2% | $6.9m |
| ADI ANALOG DEVICES INC | 3.1% | $5.1m |
| MU MICRON TECHNOLOGY INC | 2.9% | $4.7m |
| LLY ELI LILLY & CO | 2.8% | $4.6m |
| ATEX ANTERIX INC | 2.6% | $4.2m |
| ROKU ROKU INC | 2.4% | $3.9m |
| NFLX NETFLIX INC. | 2.4% | $3.8m |
| HONGBP HONEYWELL INTL INC | 2.3% | $3.7m |
| NXE NEXGEN ENERGY LTD | 2.1% | $3.5m |
| ORA ORMAT TECHNOLOGIES INC | 2.1% | $3.4m |
| MSFT MICROSOFT CORP | 1.8% | $3.0m |
| BRBR BELLRING BRANDS INC | 1.7% | $2.8m |
| INTC INTEL CORP | 1.4% | $2.3m |
| NET CLOUDFLARE INC | 1.4% | $2.2m |
| TER TERADYNE INC | 1.4% | $2.2m |
| RSP INVESCO EXCHANGE TRADED FD T | 1.3% | $2.1m |
| AMPX AMPRIUS TECHNOLOGIES INC | 1.3% | $2.1m |
| FTNT FORTINET INC | 1.3% | $2.1m |
| UPWK UPWORK INC | 1.3% | $2.1m |
Sector mix
| Sector | Weight |
|---|---|
| Technology | 49.5% |
| Healthcare | 11.5% |
| Financial Services | 8.9% |
| Industrials | 8.9% |
| Consumer Cyclical | 6.9% |
| Communication Services | 3.0% |
Sectors cover positions whose ticker resolved to a sector; the remainder is unclassified, not cash.
Filing history
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.