ARDSLEY ADVISORY PARTNERS LP
Long book
$656.4M
Q1 2026
Positions
117
Top-10 weight
33%
concentration
Last quarter
+34.5%
SPY +14.8%
Turnover
57%
of book per quarter
Strategy in plain words
auto-generated from filingsARDSLEY ADVISORY PARTNERS LP is a quantitative fund whose holdings reflect models, not opinions, running a $656.4M US long book across 117 positions.
The portfolio is moderately concentrated (top 10 ≈ 33% of the book). Turnover is high — positions rotate quickly, so individual names matter less than the process. Current anchor positions: UNITED THERAPEUTICS CORP, BROADCOM INC, SANDISK CORP, AMAZON.COM INC, ARISTA NETWORKS INC.
Over the last 9 quarters its long book ran on average 5.9pp per quarter ahead of the S&P 500, beating the index in 7 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+3.4%
Q2 2024
+6.3%
Q3 2024
+2.8%
Q4 2024
-15.3%
Q1 2025
+29.0%
Q2 2025
+18.9%
Q3 2025
+10.6%
Q4 2025
+3.0%
Q1 2026
+34.5%
Sector allocation
Technology 47%
Healthcare 14%
Industrials 8%
Services media 7%
Financials 7%
Materials 5%
Utilities 4%
Consumer discretionary 4%
Long book by quarter
What does ARDSLEY ADVISORY own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| UTHR UNITED THERAPEUTICS CORP | Healthcare | 50.0K | $29.6M | 4.5% | New |
| AVGO BROADCOM INC | Technology | 89.5K | $27.7M | 4.2% | +6.5% |
| SNDK SANDISK CORP | Technology | 42.0K | $26.7M | 4.1% | -25.0% |
| AMZN AMAZON.COM INC | Consumer discretionary | 106.0K | $22.1M | 3.4% | +96.3% |
| ANET ARISTA NETWORKS INC | Technology | 173.7K | $21.3M | 3.2% | +73.7% |
| SMTC SEMTECH CORP | Technology | 258.8K | $19.9M | 3.0% | +9.2% |
| MOD MODINE MANUFACTURING CO | Industrials | 91.1K | $19.7M | 3.0% | +2430.6% |
| SEZL SEZZLE INC | Services media | 300.0K | $19.0M | 2.9% | +22.4% |
| META META PLATFORMS INC-CLASS A | Technology | 28.0K | $16.0M | 2.4% | +1300.0% |
| RUN SUNRUN INC | Technology | 1.1M | $15.4M | 2.3% | -23.3% |
| NVDA NVIDIA CORP | Technology | 87.5K | $15.3M | 2.3% | -30.0% |
| WULF TERAWULF INC | Financials | 1.1M | $15.1M | 2.3% | -9.9% |
| BTSG BRIGHTSPRING HEALTH SERVICES | Healthcare | 350.0K | $14.9M | 2.3% | Held |
| SHLS SHOALS TECHNOLOGIES GROUP -A | Technology | 2.3M | $14.9M | 2.3% | +8940.0% |
| VIAV VIAVI SOLUTIONS INC | Technology | 400.0K | $13.3M | 2.0% | -9.1% |
| EBAY EBAY INC | Services media | 140.5K | $12.8M | 1.9% | +65.3% |
| NU NU HOLDINGS LTD/CAYMAN ISL-A | Financials | 675.0K | $9.7M | 1.5% | +5.5% |
| BSX BOSTON SCIENTIFIC CORP | Healthcare | 150.0K | $9.4M | 1.4% | New |
| GOOG ALPHABET INC-CL C | Technology | 30.0K | $8.6M | 1.3% | -47.4% |
| AMAT APPLIED MATERIALS INC | Technology | 25.0K | $8.5M | 1.3% | New |
| AGI ALAMOS GOLD INC-CLASS A | Materials | 175.0K | $7.8M | 1.2% | -41.7% |
| NOW SERVICENOW INC | Technology | 72.5K | $7.6M | 1.2% | +511.8% |
| LSCC LATTICE SEMICONDUCTOR CORP | Technology | 81.5K | $7.6M | 1.2% | -5.2% |
| HUT HUT 8 CORP | Financials | 150.0K | $7.0M | 1.1% | -58.3% |
| AVY AVERY DENNISON CORP | Other | 40.0K | $6.9M | 1.1% | +90.5% |
| ZM ZOOM COMMUNICATIONS INC | Technology | 83.0K | $6.7M | 1.0% | New |
| VZ VERIZON COMMUNICATIONS INC | Communications | 130.0K | $6.5M | 1.0% | New |
| WGS GENEDX HOLDINGS CORP | Healthcare | 100.0K | $6.4M | 1.0% | +81.8% |
| CVS CVS HEALTH CORP | Healthcare | 85.0K | $6.1M | 0.9% | Held |
| ALK ALASKA AIR GROUP INC | Industrials | 165.0K | $6.1M | 0.9% | New |
| MIR MIRION TECHNOLOGIES INC | Other | 325.0K | $6.0M | 0.9% | Held |
| TWLO TWILIO INC - A | Technology | 47.2K | $5.9M | 0.9% | -24.5% |
| CIFR CIPHER DIGITAL INC | Financials | 450.0K | $5.8M | 0.9% | New |
| BOX BOX INC - CLASS A | Technology | 236.0K | $5.6M | 0.8% | New |
| CWEN CLEARWAY ENERGY INC-C | Utilities | 140.0K | $5.5M | 0.8% | -6.7% |
| OKTA OKTA INC | Technology | 67.6K | $5.3M | 0.8% | New |
| SKE SKEENA RESOURCES LTD | Materials | 175.0K | $5.2M | 0.8% | New |
| BWXT BWX TECHNOLOGIES INC | Industrials | 25.0K | $5.1M | 0.8% | Held |
| ADI ANALOG DEVICES INC | Technology | 16.0K | $5.1M | 0.8% | New |
| XIFR XPLR INFRASTRUCTURE LP | Utilities | 475.0K | $5.0M | 0.8% | +5.6% |
| DNN DENISON MINES CORP | Materials | 1.4M | $4.9M | 0.8% | -65.9% |
| MU MICRON TECHNOLOGY INC | Technology | 14.0K | $4.7M | 0.7% | New |
| LLY ELI LILLY & CO | Healthcare | 5.0K | $4.6M | 0.7% | -87.5% |
| LITE LUMENTUM HOLDINGS INC | Technology | 6.2K | $4.4M | 0.7% | -92.3% |
| ATEX ANTERIX INC | Communications | 110.0K | $4.2M | 0.6% | New |
| VCYT VERACYTE INC | Healthcare | 125.0K | $4.0M | 0.6% | Held |
| ROKU ROKU INC | Communications | 41.5K | $3.9M | 0.6% | +361.1% |
| FLR FLUOR CORP | Industrials | 82.5K | $3.8M | 0.6% | +3.1% |
| NFLX NETFLIX INC | Services media | 40.0K | $3.8M | 0.6% | +566.7% |
| ADMA ADMA BIOLOGICS INC | Healthcare | 425.0K | $3.8M | 0.6% | New |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 151 | $784.4M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 142 | $911.1M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 130 | $808.7M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 145 | $760.6M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 139 | $522.4M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 143 | $630.6M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 128 | $608.0M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 140 | $680.8M | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 124 | $696.1M | canonical | SEC ↗ |
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