EcoR1 Capital, LLC
SEC CIK 1587114 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| ATRA | Atara Biotherapeutics, Inc. | 10% | 1.55M | $4.74M | — | 1 | 2026-05-07 | 2026-05-07 |
| TRAX | First Tracks Biotherapeutics, Inc. | 10% | 3.17M | — | -$65.00M | 1 | 2026-04-20 | 2026-04-20 |
| ZYME | Zymeworks Inc. | Dir, 10% | 17.88M | $90.65M | — | 17 | 2023-01-10 | 2025-05-15 |
| PRTA | PROTHENA CORP PUBLIC LTD CO | 10% | 5.30M | $42.09M | $81.67M | 4 | 2022-01-12 | 2025-05-02 |
| ANAB | ANAPTYSBIO, INC | Dir, 10% | 7.86M | $25.55M | $14.45M | 4 | 2022-05-05 | 2024-12-30 |
| TNGX | Tango Therapeutics, Inc. | 10% | 10.63M | — | $8.45M | 1 | 2024-11-06 | 2024-11-06 |
| VYGR | Voyager Therapeutics, Inc. | 10% | 3.96M | $2.66M | $7.14M | 2 | 2022-06-21 | 2023-01-09 |
| CRVS | Corvus Pharmaceuticals, Inc. | 10% | 81.1K | — | $25.04M | 1 | 2021-09-30 | 2021-09-30 |
| NUVB | Nuvation Bio Inc. | Affiliate of Dir | 6.74M | $3.50M | -$945.5K | 2 | 2021-03-31 | 2021-03-31 |
Most active insiders at ATRA, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | EcoR1 Capital, LLC | 10% | $4.74M | — |
| 2 | Panacea Innovation Ltd | 10% | — | $3.17M |
| 3 | Cherry Brian N | Dir | $1000.0K | — |
| 4 | Huang James | Dir, 10% | — | $489.0K |
| 5 | Nguyen AnhCo | Pres, CEO, Dir | — | $142.4K |
| 6 | Grant-Huerta Yanina | CAO | — | $56.5K |
| 7 | Ciongoli Gregory Austin | Dir, 10%, See Remarks | — | — |
| 8 | Redmile Group, LLC | Dir | — | — |
| 9 | Fust Matthew K | Dir | — | — |
| 10 | HEIDEN WILLIAM K | Dir | — | — |
Transactions 33
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| I | 2026-05-11 17:34 | 2026-05-07 | ATRA | Atara Biotherapeutics, Inc. | EcoR1 Capital, LLC | 10% | P - Purchase | $9.35 | +507.4K | 1.55M | +49% | +$4.74M |
| I | 2026-04-22 17:07 | 2026-04-20 | TRAX | First Tracks Biotherapeutics, Inc. | EcoR1 Capital, LLC | 10% | S - Sale | $13.81 | +4.71M | 3.17M | New | +$65.00M |
| MI | 2025-05-19 | 2025-05-15+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $11.47 | +55.4K | 17.88M | +0.3% | +$635.5K |
| MI | 2025-05-06 | 2025-05-02+ | PRTA | PROTHENA CORP PUBLIC LTD CO | EcoR1 Capital, LLC | 10% | S - Sale | $8.09 | -6.28M | 5.30M | -54% | -$50.83M |
| MI | 2025-04-18 | 2025-04-16+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $11.31 | +128.7K | 17.83M | +0.7% | +$1.46M |
| MI | 2025-04-02 | 2025-03-31+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $11.75 | +127.4K | 17.26M | +0.7% | +$1.50M |
| MI | 2025-03-27 | 2025-03-25+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $12.61 | +97.3K | 17.21M | +0.6% | +$1.23M |
| MI | 2025-03-24 | 2025-03-20+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $12.92 | +127.2K | 17.16M | +0.7% | +$1.64M |
| MI | 2025-03-19 | 2025-03-17+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $12.54 | +228.5K | 16.86M | +1% | +$2.87M |
| MI | 2025-01-21 | 2025-01-16+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $13.89 | +141.4K | 15.72M | +0.9% | +$1.96M |
| MI | 2025-01-15 | 2025-01-13+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $13.59 | +167.7K | 15.49M | +1% | +$2.28M |
| MI | 2025-01-10 | 2025-01-08+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $13.22 | +225.1K | 15.21M | +2% | +$2.98M |
| MI | 2025-01-02 | 2024-12-30+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $14.65 | +363.4K | 15.03M | +2% | +$5.32M |
| MI | 2025-01-02 | 2024-12-30+ | ANAB | ANAPTYSBIO, INC | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $12.92 | +85.1K | 7.86M | +1% | +$1.10M |
| MI | 2024-12-27 | 2024-12-24+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $14.44 | +130.3K | 14.70M | +0.9% | +$1.88M |
| MAI | 2024-12-26 | 2024-12-19+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | Dir, 10% | P - Purchase | $13.98 | +1.25M | 13.74M | +10% | +$17.55M |
| MI | 2024-11-08 | 2024-11-06+ | TNGX | Tango Therapeutics, Inc. | EcoR1 Capital, LLC | 10% | S - Sale | $3.13 | -2.70M | 10.63M | -20% | -$8.45M |
| I | 2024-08-16 | 2024-08-14 | ANAB | ANAPTYSBIO, INC | EcoR1 Capital, LLC | 10% | P - Purchase | $36.50 | +274.0K | 7.79M | +4% | +$10.00M |
| I | 2023-06-21 | 2023-06-16 | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | 10% | P - Purchase | $8.12 | +3.35M | 13.44M | +33% | +$27.20M |
| I | 2023-03-30 | 2023-03-28 | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | 10% | P - Purchase | $8.00 | +200.0K | 10.09M | +2% | +$1.60M |
| MI | 2023-01-23 | 2023-01-19+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | 10% | P - Purchase | $9.70 | +307.5K | 9.72M | +3% | +$2.98M |
| MI | 2023-01-18 | 2023-01-13+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | 10% | P - Purchase | $9.84 | +985.1K | 9.58M | +11% | +$9.70M |
| MI | 2023-01-12 | 2023-01-10+ | ZYME | Zymeworks Inc. | EcoR1 Capital, LLC | 10% | P - Purchase | $7.67 | +1.03M | 8.49M | +14% | +$7.87M |
| MI | 2023-01-11 | 2023-01-09+ | VYGR | Voyager Therapeutics, Inc. | EcoR1 Capital, LLC | 10% | S - Sale | $7.91 | -902.4K | 3.96M | -19% | -$7.14M |
| MI | 2022-06-23 | 2022-06-21+ | VYGR | Voyager Therapeutics, Inc. | EcoR1 Capital, LLC | 10% | P - Purchase | $5.58 | +477.4K | 4.75M | +11% | +$2.66M |
| I | 2022-05-09 | 2022-05-05 | ANAB | ANAPTYSBIO, INC | EcoR1 Capital, LLC | 10% | P - Purchase | $21.63 | +668.2K | 7.52M | +10% | +$14.45M |
| I | 2022-05-09 | 2022-05-05 | ANAB | ANAPTYSBIO, INC | EcoR1 Capital, LLC | 10% | S - Sale | $21.63 | -668.2K | 7.52M | -8% | -$14.45M |
| I | 2022-05-09 | 2022-05-05 | PRTA | PROTHENA CORP PUBLIC LTD CO | EcoR1 Capital, LLC | 10% | P - Purchase | $29.02 | +1.06M | 11.58M | +10% | +$30.84M |
| I | 2022-05-09 | 2022-05-05 | PRTA | PROTHENA CORP PUBLIC LTD CO | EcoR1 Capital, LLC | 10% | S - Sale | $29.02 | -1.06M | 11.58M | -8% | -$30.84M |
| I | 2022-01-12 | 2022-01-12 | PRTA | PROTHENA CORP PUBLIC LTD CO | EcoR1 Capital, LLC | 10% | P - Purchase | $37.50 | +300.0K | 11.58M | +3% | +$11.25M |
| MI | 2021-11-30 | 2021-03-31+ | NUVB | Nuvation Bio Inc. | EcoR1 Capital, LLC | Affiliate of Dir | P - Purchase | $8.89 | +393.2K | 6.74M | +6% | +$3.50M |
| MI | 2021-11-30 | 2021-03-31+ | NUVB | Nuvation Bio Inc. | EcoR1 Capital, LLC | Affiliate of Dir | S - Sale | $9.96 | +94.9K | 1.15M | +9% | +$945.5K |
| MI | 2021-10-01 | 2021-09-30+ | CRVS | Corvus Pharmaceuticals, Inc. | EcoR1 Capital, LLC | 10% | S - Sale | $5.01 | -5.00M | 81.1K | -98% | -$25.04M |
Purchase Sale Sale after option exercise All abbreviations