Assembly Biosciences, Inc. (ASMB) ownership: Top institutional holder: GILEAD SCIENCES, INC. ($125.02M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| GILEAD SCIENCES, INC. | 4505391.00 | $125.02M | 2026-03-31 |
| FARALLON CAPITAL MANAGEMENT LLC | 1227590.00 | $34.07M | 2026-03-31 |
| RA CAPITAL MANAGEMENT, L.P. | 1020410.00 | $28.32M | 2026-03-31 |
| Commodore Capital LP | 1000000.00 | $27.75M | 2026-03-31 |
| JANUS HENDERSON GROUP PLC | 849309.00 | $23.48M | 2026-03-31 |
| VANGUARD GROUP INC | 572898.00 | $19.48M | 2025-12-31 |
| Paradigm Biocapital Advisors LP | 665251.00 | $18.46M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 490447.00 | $13.61M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-06-04 | |
| Sell | null | 2026-05-26 |
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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.