SEC CIK 1587114
EcoR1 Capital, LLC
Reported ownership across 4 companies, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| ANABview stock → | 7,880,094 | 2025-01-02 |
| PRTAview stock → | 5,304,596 | 2025-05-06 |
| VYGRview stock → | 3,851,507 | 2023-01-11 |
| ATRAview stock → | 1,044,593 | 2026-05-07 |
Position History — ATRA
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — ATRA
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-05-07 | — | — | — | 1,044,593 |
| 2026-05-07 | Open-market buy | 507,407 | $9.35 | 1,552,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.