Through the 90-day period concluding January 10, 2026, Assembly Biosciences's top three insider stakeholders include TenPercentOwner Sciences, Inc. Gilead (4.51Mn shares), TenPercentOwner Alexander Schornstein (728.11K shares), Director John G Mchutchison (18.35K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Sciences, Inc. Gilead | 4,505,391 | 03 Oct, 2025 | |
| Alexander Schornstein | 728,113 | 25 Nov, 2024 | |
| Michael P. Samar | Chief Financial Officer | 6,435 | 26 Jul, 2022 |
| Luisa M Stamm | Chief Medical Officer | 3,359 | 31 Mar, 2022 |
| John G Mchutchison | 18,347 | 15 Apr, 2025 | |
| William E Iv Delaney | Chief Scientific Officer | 16,109 | 01 May, 2024 |
| Jason A Okazaki | Ceo And President | 14,757 | 01 Apr, 2025 |
| Nicole S White | Chief Manufacturing Officer | 11,674 | 01 Apr, 2025 |
| Jeanette M Bjorkquist | Pfo And Pao | 5,097 | 17 Jun, 2025 |
| Michael Houghton | 3,202 | 31 Dec, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 08 Aug, 2025 | Sciences, Inc. Gilead | Common Stock | A | 2,295,920 | - | 4,505,391 | D | P |
| 16 Jun, 2025 | Jeanette M Bjorkquist | - | - | 5,097 | D | |||
| 16 Jun, 2025 | Jeanette M Bjorkquist | Common Stock | A | 300 | $0.00 | 5,097 | D | A |
| 31 Mar, 2025 | John G Mchutchison | - | - | 18,347 | D | |||
| 31 Mar, 2025 | John G Mchutchison | Common Stock | D | 757 | $9.85 | 18,347 | D | S |
| 31 Mar, 2025 | Jason A Okazaki | Common Stock | D | 355 | $9.85 | 14,757 | D | S |
| 31 Mar, 2025 | Jeanette M Bjorkquist | Common Stock | D | 180 | $9.85 | 4,617 | D | S |
| 31 Mar, 2025 | Nicole S White | Common Stock | D | 197 | $9.85 | 11,674 | D | S |
| 29 Mar, 2025 | Jeanette M Bjorkquist | Common Stock | A | 1,655 | $0.00 | 4,797 | D | A |
| 30 Dec, 2024 | Michael Houghton | - | - | 3,202 | I | |||
| 30 Dec, 2024 | Michael Houghton | Common Stock | A | 3,202 | $15.61 | 3,202 | I | P |
| 19 Dec, 2024 | Sciences, Inc. Gilead | Common Stock | A | 940,499 | $21.37 | 2,209,471 | D | P |
| 19 Dec, 2024 | Sciences, Inc. Gilead | - | - | 2,209,471 | D | |||
| 25 Nov, 2024 | Alexander Schornstein | - | - | 728,113 | D | |||
| 25 Nov, 2024 | Alexander Schornstein | Common Stock | A | 2,976 | $15.00 | 723,113 | D | P |
| 25 Nov, 2024 | Alexander Schornstein | Common Stock | A | 5,000 | $14.85 | 728,113 | D | P |
| 25 Nov, 2024 | Alexander Schornstein | - | - | 723,113 | D | |||
| 22 Nov, 2024 | Alexander Schornstein | - | - | 720,137 | D | |||
| 22 Nov, 2024 | Alexander Schornstein | Common Stock | A | 17,024 | $14.87 | 720,137 | D | P |
| 18 Nov, 2024 | Nicole S White | Common Stock | D | 40 | $16.29 | 11,871 | D | S |