Skip to contentEcoR1 Capital, LLC — Zymeworks Inc. insider: 123 transactions · InsiderLensEcoR1 Capital, LLC
- 10% owner at TScan Therapeutics, Inc. · on record since Jun 5, 2023
- 10% owner at Mersana Therapeutics, Inc. · on record since Jul 31, 2023
- 10% owner at Mirati Therapeutics, Inc. · on record since Dec 27, 2023
- 10% owner at Tango Therapeutics, Inc. · on record since Oct 16, 2023
- 10% owner at Adaptimmune Therapeutics PLC · on record since Mar 26, 2024
- 10% owner at GENVEC INC · on record since Nov 27, 2013
- Director at Zymeworks Inc. · on record since Dec 27, 2024
- Director at ANAPTYSBIO, INC · on record since Apr 27, 2021
- 10% owner at iTeos Therapeutics, Inc. · on record since May 16, 2025
- Director at Aktis Oncology, Inc. · on record since Jan 12, 2026
- 10% owner at Aktis Oncology, Inc. · on record since Jan 8, 2026
- 10% owner at First Tracks Biotherapeutics, Inc. · on record since Apr 22, 2026
- 10% owner at Atara Biotherapeutics, Inc. · on record since May 11, 2026
- 10% owner at CELADON GROUP INC · on record since Jun 30, 2015
- 10% owner at PROTHENA CORP PUBLIC LTD CO · on record since Aug 27, 2019
- Director at Nuvation Bio Inc. · on record since Jun 30, 2020
- 10% owner at Nuvation Bio Inc. · on record since Jun 30, 2020
- 10% owner at Surface Oncology, Inc. · on record since May 29, 2020
- 10% owner at Akouos, Inc. · on record since Jun 25, 2020
- 10% owner at ANAPTYSBIO, INC · on record since Feb 25, 2021
- 10% owner at Corvus Pharmaceuticals, Inc. · on record since Sep 22, 2021
- Affiliate of Director at Nuvation Bio Inc. · on record since Nov 30, 2021
- 10% owner at Odonate Therapeutics, Inc. · on record since Nov 18, 2021
- 10% owner at Voyager Therapeutics, Inc. · on record since Apr 25, 2022
- 10% owner at Zymeworks Inc. · on record since Nov 1, 2022
- 10% owner at GRAPHITE CORP · on record since Jan 6, 2023
Insider trading activity of EcoR1 Capital, LLC
- Transactions on record
- 123
- since Mar 28, 2014
- Open-market buys
- 77
- $330M
- Open-market sells
- 24
- $222.7M
- Companies traded
- 16
- last filing May 11, 2026
Figures computed from official regulatory filings — methodology.
Companies where EcoR1 Capital, LLC has traded
- Atara Biotherapeutics, Inc.1 tx · $4.7M · May 11, 2026
- First Tracks Biotherapeutics, Inc.1 tx · $65M · Apr 22, 2026
- Adaptimmune Therapeutics PLC3 tx · $6.7M · Jul 30, 2025
- Zymeworks Inc.42 tx · $190.7M · May 19, 2025
- iTeos Therapeutics, Inc.2 tx · $38.7M · May 16, 2025
- PROTHENA CORP PUBLIC LTD CO19 tx · $165.5M · May 6, 2025
- ANAPTYSBIO, INC9 tx · $103.4M · Jan 2, 2025
- Mersana Therapeutics, Inc.2 tx · Dec 23, 2024
- Tango Therapeutics, Inc.3 tx · $8.4M · Nov 8, 2024
Track record of EcoR1 Capital, LLC
Statistical track record
Free- Open-market buys
- 81
- Last buy
- May 7, 2026
Win rates and median returns are available with a free account (5 insiders/month).
Create a free account→Transaction history of EcoR1 Capital, LLC
Co-insiders of EcoR1 Capital, LLC
This page republishes public regulatory disclosures. Concerned by this data? Exercise your right to object →
5 tx · $9.8M · Jan 11, 2023
SANDELL SCOTT DAdaptimmune Therapeutics PLC +3
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| May 11, 2026 | Buy | 507,407 | 9.35 USD | $4.7M | SEC |
| Apr 22, 2026 | Sell | 4,705,575 | 13.81 USD | $65M | SEC |
| Jul 30, 2025 | Sell | -27,433,338 | 0.10 USD | $2.7M | SEC |
| Jul 30, 2025 | Sell | -33,931,740 | 0.11 USD | $3.7M | SEC |
| Jul 30, 2025 | Sell | -2,687,460 | 0.10 USD | $268.7K | SEC |
| May 19, 2025 | Buy | 49,502 | 11.43 USD | $565.8K | SEC |
| May 19, 2025 | Buy | 5,919 | 11.78 USD | $69.7K | SEC |
| May 16, 2025 | Buy | 1,658,978 | 7.41 USD | $12.3M | SEC |
| May 16, 2025 | Buy | 3,300,000 | 8.00 USD | $26.4M | SEC |
| May 6, 2025 | Sell | -977,693 | 8.11 USD | $7.9M | SEC |
| May 6, 2025 | Sell | -3,317,938 | 8.36 USD | $27.7M | SEC |
| May 6, 2025 | Sell | -1,984,053 | 7.64 USD | $15.2M | SEC |
| Apr 18, 2025 | Buy | 73,953 | 11.16 USD | $825.3K | SEC |
| Apr 18, 2025 | Buy | 54,760 | 11.52 USD | $630.8K | SEC |
| Apr 2, 2025 | Buy | 4,397 | 11.75 USD | $51.7K | SEC |
| Apr 2, 2025 | Buy | 48,658 | 11.60 USD | $564.4K | SEC |
| Apr 2, 2025 | Buy | 74,360 | 11.85 USD | $881.2K | SEC |
| Mar 27, 2025 | Buy | 53,501 | 12.91 USD | $690.7K | SEC |
| Mar 27, 2025 | Buy | 43,848 | 12.24 USD | $536.7K | SEC |
| Mar 24, 2025 | Buy | 31,033 | 12.78 USD | $396.6K | SEC |
| Mar 24, 2025 | Buy | 22,689 | 13.08 USD | $296.8K | SEC |
| Mar 24, 2025 | Buy | 73,476 | 12.93 USD | $950K | SEC |
| Mar 19, 2025 | Buy | 56,277 | 12.23 USD | $688.3K | SEC |
| Mar 19, 2025 | Buy | 58,306 | 12.64 USD | $737K | SEC |
| Mar 19, 2025 | Buy | 113,880 | 12.65 USD | $1.4M | SEC |