AnaptysBio, Inc. (ANAB) ownership: Top institutional holder: EcoR1 Capital, LLC ($437.03M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| EcoR1 Capital, LLC | 7880094.00 | $437.03M | 2026-03-31 |
| BlackRock, Inc. | 1681380.00 | $93.25M | 2026-03-31 |
| VANGUARD GROUP INC | 1544037.00 | $74.85M | 2025-12-31 |
| TANG CAPITAL MANAGEMENT LLC | 1330879.00 | $73.81M | 2026-03-31 |
| MORGAN STANLEY | 993905.00 | $55.12M | 2026-03-31 |
| STATE STREET CORP | 992445.00 | $55.04M | 2026-03-31 |
| Affinity Asset Advisors, LLC | 940000.00 | $52.13M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 853151.00 | $47.32M | 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.