As of May 30, 2026, Assembly Biosciences's top three insider holders are Sciences, Inc. Gilead (TenPercentOwner, 4.51Mn shares), Alexander Schornstein (TenPercentOwner, 728.11K shares), Jason A Okazaki (Ceo And President, 111.92K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Sciences, Inc. Gilead | - | 4,505,391 | 0 | 03 Oct, 2025 |
| John G Mchutchison | Chief Executive Officer | 18,347 | 0 | 15 Apr, 2025 |
| Luisa M Stamm | Chief Medical Officer | 40,315 | 0 | 31 Mar, 2022 |
| Jason A Okazaki | Ceo And President | 111,916 | 0 | 31 Mar, 2026 |
| William E Iv Delaney | Chief Scientific Officer | 45,642 | 0 | 31 Mar, 2026 |
| Michael Houghton | - | 0 | 3,202 | 31 Dec, 2024 |
| Jeanette M Bjorkquist | Pfo And Pao | 11,089 | 0 | 31 Mar, 2026 |
| Nicole S White | Chief Manufacturing Officer | 37,477 | 0 | 31 Mar, 2026 |
| Alexander Schornstein | - | 728,113 | 0 | 25 Nov, 2024 |
| Anuj Gaggar | Chief Medical Officer | 28,000 | 0 | 31 Mar, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 29 Mar, 2026 | Jeanette M Bjorkquist | Common Stock | A | 6,500 | $0.00 | 11,417 | D | A |
| 29 Mar, 2026 | Jeanette M Bjorkquist | Common Stock | A | 6,500 | $0.00 | 11,417 | D | A |
| 29 Mar, 2026 | William E Iv Delaney | Common Stock | A | 26,000 | $0.00 | 45,642 | D | A |
| 29 Mar, 2026 | Nicole S White | Common Stock | A | 26,000 | $0.00 | 37,674 | D | A |
| 29 Mar, 2026 | William E Iv Delaney | Common Stock | A | 26,000 | $0.00 | 45,642 | D | A |
| 29 Mar, 2026 | Jason A Okazaki | Common Stock | A | 94,250 | $0.00 | 111,916 | D | A |
| 29 Mar, 2026 | Anuj Gaggar | Common Stock | A | 26,000 | $0.00 | 28,000 | D | A |
| 29 Mar, 2026 | Jason A Okazaki | Common Stock | A | 94,250 | $0.00 | 111,916 | D | A |
| 29 Mar, 2026 | Anuj Gaggar | Common Stock | A | 26,000 | $0.00 | 28,000 | D | A |
| 29 Mar, 2026 | Nicole S White | Common Stock | A | 26,000 | $0.00 | 37,674 | D | A |
| 30 Mar, 2026 | Jeanette M Bjorkquist | Common Stock | D | 312 | $26.65 | 11,105 | D | S |
| 30 Mar, 2026 | Nicole S White | Common Stock | D | 188 | $26.65 | 37,486 | D | S |
| 30 Mar, 2026 | Nicole S White | Common Stock | D | 188 | $26.65 | 37,486 | D | S |
| 30 Mar, 2026 | Jeanette M Bjorkquist | Common Stock | D | 312 | $26.65 | 11,105 | D | S |
| 30 Mar, 2026 | Jeanette M Bjorkquist | Common Stock | D | 16 | $27.49 | 11,089 | D | S |
| 30 Mar, 2026 | Jeanette M Bjorkquist | Common Stock | D | 16 | $27.49 | 11,089 | D | S |
| 30 Mar, 2026 | Nicole S White | Common Stock | D | 9 | $27.49 | 37,477 | D | S |
| 30 Mar, 2026 | Nicole S White | Common Stock | D | 9 | $27.49 | 37,477 | D | S |
| 08 Aug, 2025 | Sciences, Inc. Gilead | Common Stock | A | 2,295,920 | - | 4,505,391 | D | P |
| 08 Aug, 2025 | Sciences, Inc. Gilead | Class A warrants to purchase Common Stock | A | 1,147,960 | - | 1,147,960 | D | P |