Assembly Biosciences, Inc.
ASMB- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001426800
No open-market purchases or sales by Assembly Biosciences, Inc. insiders were filed in the last 90 days; 92 institutions reported holding it in 13F filings for Q2 2026, worth $514.8M in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Assembly Biosciences, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 0 filings
- Insiders trading
- 0
- Net value
- $0
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Assembly Biosciences, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Bjorkquist Jeanette M | PFO and PAO | 14,560 | Jun 18, 2026 | 3 |
| Altig Anthony E | Director | – | Jun 5, 2026 | 1 |
| Mahony Susan | Director | – | Jun 5, 2026 | 1 |
| Consylman Gina | Director | – | Jun 5, 2026 | 1 |
| McHutchison John G | Director | 18,347 | Jun 5, 2026 | 1 |
| Okazaki Jason A | CEO and President | 163,354 | Jun 5, 2026 | 2 |
| Delaney William E IV | Chief Scientific Officer | 60,330 | Jun 5, 2026 | 2 |
| Johnson-Pratt Lisa | Director | – | Jun 5, 2026 | 1 |
| Houghton Michael | Director | 3,202Indirect | Jun 5, 2026 | 1 |
| White Nicole S | Chief Manufacturing Officer | 48,145 | Jun 5, 2026 | 2 |
| Gaggar Anuj | Chief Medical Officer | 42,688 | Jun 5, 2026 | 2 |
| Gilead Sciences, Inc. | 10% Owner | 4,977,089 | May 27, 2026 | 2 |
| Ringo William R | Director | – | Jun 9, 2025 | 0 |
| Schornstein Alexander | 10% Owner | 728,113 | Nov 26, 2024 | 0 |
| Samar Michael P. | Chief Financial Officer | 77,228 | Jul 26, 2022 | 0 |
| DiMarchi Richard D | Director | – | May 27, 2022 | 0 |
| Stamm Luisa M | Chief Medical Officer | 40,315 | Mar 31, 2022 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Mar 28, 2023 (view filing) | Mar 27 | 1 day | Okazaki Jason ACEO and President | SSale | −4.69K | $1.02 | −$4.79K | −4.4%102.4K after | |
| Aug 10, 2022 (view filing) | Aug 8 | 2 days | McHutchison John GChief Executive Officer | SSale | −12.3K | $2.13 | −$26.2K | −6.0%192.5K after | |
| Jul 26, 2022 (view filing) | Jul 25 | 1 day | Samar Michael P.Chief Financial Officer | SSale | −2.02K | $2.22 | −$4.48K | −2.5%77.2K after | |
| Jun 2, 2022 (view filing) | May 31 | 2 days | Delaney William E IVChief Scientific Officer | SSale | −4.16K | $1.92 | −$7.99K | −5.2%76.4K after | |
| Mar 31, 2022 (view filing) | Mar 30 | 1 day | Samar Michael P.Chief Financial Officer | SSale | −2.29K | $2.17 | −$4.96K | −2.9%76.7K after | |
| Mar 31, 2022 (view filing) | Mar 30 | 1 day | Stamm Luisa MChief Medical Officer | SSale | −1.04K | $2.17 | −$2.25K | −2.5%40.3K after | |
| Mar 31, 2022 (view filing) | Mar 30 | 1 day | Delaney William E IVChief Scientific Officer | SSale | −1.04K | $2.17 | −$2.25K | −1.3%78.1K after | |
| Mar 31, 2022 (view filing) | Mar 30 | 1 day | Okazaki Jason AChief Operating Officer | SSale | −1.27K | $2.17 | −$2.75K | −1.3%94.6K after | |
| Mar 31, 2022 (view filing) | Mar 30 | 1 day | McHutchison John GCEO and President | SSale | −4.61K | $2.17 | −$10.0K | −2.2%204.8K after | |
| Mar 29, 2022 (view filing) | Mar 28 | 1 day | Okazaki Jason AChief Operating Officer | SSale | −4.62K | $2.24 | −$10.3K | −6.7%64.6K after | |
| Aug 10, 2021 (view filing) | Aug 9 | 1 day | McHutchison John GCEO and President | SSale | −12.2K | $3.60 | −$43.8K | −8.8%125.7K after |