Managers / Q1 2026
ARDSLEY ADVISORY PARTNERS LP
CIK 0000900529 · 105 ROWAYTON AVE, NORWALK, CT, 06853 · 203-564-4230
Reported Value
$784M
Q1 2026
Positions
151
Filings on Record
31
2019–present window
Filed
May 15, 2026
original filing
Summary
Ardsley Advisory Partners Lp reported $784M in U.S.-listed holdings across 151 positions for Q1 2026.
Its largest position, UTH, represents 3.8% of the portfolio.
Compared with Q4 2025, the fund opened 53 new positions and exited 50.
Reported Value by Quarter
13F Reported Value
Portfolio Composition
By security type
- Common Stock · 87.3% · $685M
- ETP · 6.8% · $54M
- ADR · 2.9% · $23M
- REIT · 1.5% · $12M
- Other · 1.3% · $10M
- Other · 0.2% · $1M
Quarter-over-Quarter Changes full breakdown →
Holdings — Q1 2026
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $784M | 151 | May 15, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $911M | 142 | Feb 17, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $809M | 130 | Nov 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $761M | 145 | Aug 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $522M | 139 | May 15, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q4 2024 | $631M | 143 | Feb 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $608M | 128 | Nov 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q2 2024 | $681M | 140 | Aug 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q1 2024 | $696M | 124 | May 15, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q4 2023 | $648M | 138 | Feb 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q3 2023 | $448M | 114 | Nov 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q2 2023 | $592M | 121 | Aug 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q1 2023 | $455M | 101 | May 15, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q4 2022 | $482.9B | 119 | Feb 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q3 2022 | $447M | 103 | Nov 14, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q2 2022 | $608M | 124 | Aug 15, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q1 2022 | $599M | 126 | May 16, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q4 2021 | $525M | 106 | Feb 14, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q3 2021 | $656M | 126 | Nov 15, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q2 2021 | $851M | 130 | Aug 16, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q1 2021 | $822M | 123 | May 17, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q4 2020 | $609M | 128 | Feb 16, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q3 2020 | $518M | 145 | Nov 13, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q2 2020 | $470M | 132 | Aug 14, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q1 2020 | $255M | 101 | May 15, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q4 2019 | $627M | 150 | Feb 14, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q3 2019 | $446M | 133 | Nov 14, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q2 2019 | $634M | 148 | Aug 15, 2019 | RESTATEMENT | changes · EDGAR ↗ |
| Q1 2019 | $521M | 131 | May 15, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q4 2018 | $398M | 104 | Feb 14, 2019 | 13F-HR | changes · EDGAR ↗ |
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.