Managers / Q1 2026
EcoR1 Capital, LLC
CIK 0001587114 · 357 TEHAMA STREET #3, SAN FRANCISCO, CA, 94103 · 415-448-6534
Reported Value
$2.4B
Q1 2026
Positions
30
Filings on Record
32
2019–present window
Filed
May 15, 2026
original filing
Summary
Ecor1 Capital, Llc reported $2.4B in U.S.-listed holdings across 30 positions for Q1 2026.
The portfolio is heavily concentrated: ZYME alone accounts for 24.4% of reported value.
Compared with Q4 2025, the fund opened 10 new positions and exited 9.
Reported Value by Quarter
13F Reported Value
Portfolio Composition
By security type
- Common Stock · 70.0% · $1.6B
- Other · 16.9% · $398M
- ADR · 13.1% · $309M
- Equity WRT · 0.0% · $129,454
Quarter-over-Quarter Changes full breakdown →
Holdings — Q1 2026
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $2.4B | 30 | May 15, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $2.2B | 30 | Feb 17, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $2.1B | 30 | Nov 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $1.7B | 37 | Aug 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $1.7B | 46 | May 15, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q4 2024 | $2.6B | 59 | Feb 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $2.9B | 64 | Nov 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q2 2024 | $3.3B | 55 | Aug 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q1 2024 | $4.0B | 59 | May 15, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q4 2023 | $3.9B | 51 | Feb 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q3 2023 | $3.0B | 51 | Nov 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q2 2023 | $4.1B | 53 | Aug 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q1 2023 | $3.1B | 58 | May 15, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q4 2022 | $3.29T | 66 | Feb 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q3 2022 | $3.4B | 76 | Nov 14, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q2 2022 | $2.9B | 80 | Aug 15, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q1 2022 | $3.2B | 87 | May 16, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q4 2021 | $3.1B | 76 | Feb 14, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q3 2021 | $2.9B | 71 | Nov 22, 2021 | RESTATEMENT | changes · EDGAR ↗ |
| Q2 2021 | $2.7B | 72 | Aug 16, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q1 2021 | $2.3B | 71 | May 17, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q4 2020 | $1.9B | 67 | Feb 16, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q3 2020 | $1.4B | 50 | Nov 16, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q2 2020 | $1.4B | 49 | Aug 14, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q1 2020 | $957M | 51 | May 15, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q4 2019 | $1.1B | 44 | Feb 18, 2020 | RESTATEMENT | changes · EDGAR ↗ |
| Q3 2019 | $792M | 41 | Nov 14, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q2 2019 | $990M | 40 | Aug 14, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q1 2019 | $1.1B | 41 | May 15, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q4 2018 | $999M | 54 | 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 ↗.