AnaptysBio, Inc. (ANAB) ownership: EcoR1 Capital LLC 59% · institutions 93% · index and ETF funds 5% (13F 2026-03-31). Insider activity, 90 days: 0 sales, 0 open-market buys. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| EcoR1 Capital, LLC | 7880094.00 | $437.03M | 27.1% | 2026-03-31 |
| BlackRock | 1681380.00 | $93.25M | 5.8% | 2026-03-31 |
| Vanguard | 1533122.00 | $85.03M | 5.3% | 2026-03-31 |
| Tang Capital Management LLC | 1330879.00 | $73.81M | 4.6% | 2026-03-31 |
| Morgan Stanley | 993905.00 | $55.12M | 3.4% | 2026-03-31 |
| State Street | 992445.00 | $55.04M | 3.4% | 2026-03-31 |
| Affinity Asset Advisors, LLC | 940000.00 | $52.13M | 3.2% | 2026-03-31 |
| Palo Alto Investors LP | 638161.00 | $35.39M | 2.2% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-05-11 | |
| Sell | null | 2026-05-11 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.