Assembly Biosciences, Inc. SEC filings ASMB
Assembly Biosciences, Inc. has 901 filings in SEC EDGAR's recent list, going back to Feb 7, 2008. Its latest annual report, Form ARS, was filed on Apr 22, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 13, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 13, 2026 (acquisition or sale of assets). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 144 | Notice of proposed sale | Nov 2, 2026 | — |
| 144 | Notice of proposed sale | Nov 2, 2026 | — |
| 144 | Notice of proposed sale | Nov 2, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 4, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 26, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | May 27, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 11, 2026 | — |
| 4 | Insider transaction | Mar 31, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 29, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 29, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 9, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Dec 8, 2025 | — |
| 4 | Insider transaction | Oct 3, 2025 | Aug 8, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 18, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 18, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 15, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 15, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 12, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Aug 12, 2025 | — |
| 4 | Insider transaction | Jun 17, 2025 | Jun 16, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Apr 15, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 29, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 29, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 29, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 29, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 29, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 4 | Insider transaction | Dec 31, 2024 | Dec 30, 2024 |
| 4 | Insider transaction | Dec 23, 2024 | Dec 19, 2024 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Dec 23, 2024 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 23, 2024 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Dec 23, 2024 | — |
| 4 | Insider transaction | Nov 26, 2024 | Nov 22, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 18, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| 4 | Insider transaction | Oct 9, 2024 | Oct 8, 2024 |
| 4 | Insider transaction | Oct 4, 2024 | Oct 3, 2024 |
| 4 | Insider transaction | Oct 4, 2024 | Oct 3, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 2, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 2, 2024 |
| 4 | Insider transaction | Jul 8, 2024 | Jul 3, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 24, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jun 20, 2024 | — |
| 4 | Insider transaction | Jun 20, 2024 | Jun 17, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 30, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 1, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | May 1, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | May 1, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | Mar 29, 2024 | Mar 27, 2024 |
| 3 | Initial insider ownership | Mar 15, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Jan 19, 2024 | Jan 17, 2024 |
| 3 | Initial insider ownership | Dec 11, 2023 | Dec 7, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 22, 2023 | — |
| 4 | Insider transaction | Nov 22, 2023 | Nov 20, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 17, 2023 |
| 4 | Insider transaction | Nov 13, 2023 | Nov 8, 2023 |
| 3 | Initial insider ownership | Nov 13, 2023 | Nov 8, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 3, 2023 | — |
| SC 13D | Ownership over 5% (active) | Oct 31, 2023 | — |
| 3 | Initial insider ownership | Oct 31, 2023 | Oct 23, 2023 |
| 3 | Initial insider ownership | Oct 25, 2023 | Oct 16, 2023 |
| SC 13D | Ownership over 5% (active) | Oct 25, 2023 | — |
| 4 | Insider transaction | Oct 4, 2023 | Oct 2, 2023 |
| 4 | Insider transaction | Oct 4, 2023 | Oct 2, 2023 |
| 4 | Insider transaction | Oct 4, 2023 | Oct 2, 2023 |
| 144 | Notice of proposed sale | Oct 3, 2023 | — |
| 144 | Notice of proposed sale | Oct 3, 2023 | — |
| 3 | Initial insider ownership | Sep 18, 2023 | Sep 13, 2023 |
| 4 | Insider transaction | Aug 3, 2023 | Aug 2, 2023 |
| 4 | Insider transaction | Aug 3, 2023 | Aug 2, 2023 |
| 144 | Notice of proposed sale | Aug 2, 2023 | — |
| 144 | Notice of proposed sale | Aug 2, 2023 | — |
| 4 | Insider transaction | Jul 25, 2023 | Jul 24, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | May 31, 2023 | May 30, 2023 |
| 144 | Notice of proposed sale | May 30, 2023 | — |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 24, 2023 | May 22, 2023 |
| 4 | Insider transaction | May 24, 2023 | May 22, 2023 |
| 4 | Insider transaction | May 24, 2023 | May 22, 2023 |
| 4 | Insider transaction | May 24, 2023 | May 22, 2023 |
| 144 | Notice of proposed sale | May 23, 2023 | — |
| 144 | Notice of proposed sale | May 23, 2023 | — |
| 144 | Notice of proposed sale | May 23, 2023 | — |
| 4 | Insider transaction | Mar 31, 2023 | Mar 30, 2023 |
| 4 | Insider transaction | Mar 31, 2023 | Feb 16, 2023 |
| 4 | Insider transaction | Mar 31, 2023 | Mar 29, 2023 |
| 4 | Insider transaction | Mar 31, 2023 | Mar 29, 2023 |
| 4 | Insider transaction | Mar 28, 2023 | Mar 27, 2023 |
| 4 | Insider transaction | Feb 17, 2023 | Feb 16, 2023 |
| 4 | Insider transaction | Feb 17, 2023 | Feb 16, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| 3 | Initial insider ownership | Sep 13, 2022 | Sep 9, 2022 |
| 4 | Insider transaction | Aug 10, 2022 | Aug 8, 2022 |
| 4 | Insider transaction | Aug 3, 2022 | Aug 1, 2022 |
| 4 | Insider transaction | Aug 3, 2022 | Aug 1, 2022 |
| 4 | Insider transaction | Jul 26, 2022 | Jul 25, 2022 |
| 4 | Insider transaction | Jun 2, 2022 | May 31, 2022 |
| 4 | Insider transaction | May 27, 2022 | May 25, 2022 |
| 4 | Insider transaction | May 27, 2022 | May 25, 2022 |
| 4 | Insider transaction | May 27, 2022 | May 25, 2022 |
| 4 | Insider transaction | May 27, 2022 | May 25, 2022 |
| 4 | Insider transaction | May 27, 2022 | May 25, 2022 |
| 4 | Insider transaction | May 27, 2022 | May 25, 2022 |
| 4 | Insider transaction | May 27, 2022 | May 25, 2022 |
| 4 | Insider transaction | Mar 31, 2022 | Mar 29, 2022 |
| 4 | Insider transaction | Mar 31, 2022 | Mar 29, 2022 |
| 4 | Insider transaction | Mar 31, 2022 | Mar 29, 2022 |
| 4 | Insider transaction | Mar 31, 2022 | Mar 29, 2022 |
| 4 | Insider transaction | Mar 31, 2022 | Mar 29, 2022 |
| 4 | Insider transaction | Mar 29, 2022 | Mar 28, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 15, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Oct 12, 2021 | — |
| 4 | Insider transaction | Aug 10, 2021 | Aug 9, 2021 |
| 4 | Insider transaction | Jul 22, 2021 | Jul 22, 2021 |
| 4 | Insider transaction | Jul 20, 2021 | Jul 19, 2021 |
| 3 | Initial insider ownership | Jul 20, 2021 | Jul 19, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 12, 2021 | — |
| 3 | Initial insider ownership | Jun 4, 2021 | Jun 4, 2021 |
| 4 | Insider transaction | Jun 1, 2021 | May 27, 2021 |
| 4 | Insider transaction | May 24, 2021 | May 20, 2021 |
| 4 | Insider transaction | May 24, 2021 | May 20, 2021 |
| 4 | Insider transaction | May 24, 2021 | May 20, 2021 |
| 4 | Insider transaction | May 24, 2021 | May 20, 2021 |
| 4 | Insider transaction | May 24, 2021 | May 20, 2021 |
| 4 | Insider transaction | May 24, 2021 | May 20, 2021 |
| 4 | Insider transaction | May 24, 2021 | May 20, 2021 |
| 3 | Initial insider ownership | May 24, 2021 | May 20, 2021 |
| 4 | Insider transaction | Apr 2, 2021 | Mar 29, 2021 |
| 4 | Insider transaction | Apr 2, 2021 | Mar 29, 2021 |
| 4 | Insider transaction | Apr 2, 2021 | Mar 29, 2021 |
| 4 | Insider transaction | Apr 2, 2021 | Mar 29, 2021 |
| 4 | Insider transaction | Apr 2, 2021 | Mar 29, 2021 |
| SC 13G | Ownership over 5% (passive) | Feb 17, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 10, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 29, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Jan 4, 2021 | — |
| 4 | Insider transaction | Dec 15, 2020 | Dec 14, 2020 |
| 4 | Insider transaction | Nov 10, 2020 | Nov 9, 2020 |
| 4 | Insider transaction | Oct 21, 2020 | Oct 19, 2020 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- ASMB (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- South San Francisco, CA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1426800
- Former names
- VENTRUS BIOSCIENCES INC (until Jul 11, 2014)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.