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 |
|---|---|---|---|
| S-8 | Employee stock plan registration | Aug 20, 2026 | — |
| 8-K/A |
Amended current report
Results of operations
|
Aug 14, 2026 | Aug 13, 2026 |
| 10-Q | Quarterly report | Aug 13, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Acquisition or sale of assets
|
Aug 13, 2026 | Aug 13, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 5, 2026 | Jun 4, 2026 |
| 8-K |
Current report
Material agreement, Other events
|
May 26, 2026 | May 21, 2026 |
| 424B5 | Prospectus supplement | May 26, 2026 | — |
| 424B5 | Prospectus supplement | May 22, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
May 22, 2026 | May 22, 2026 |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| DEFA14A | Additional proxy material | Apr 22, 2026 | — |
| DEF 14A | Proxy statement | Apr 22, 2026 | Jun 4, 2026 |
| ARS | Annual report to shareholders | Apr 22, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Officer or director change
|
Mar 30, 2026 | Mar 24, 2026 |
| EFFECT | Filing | Mar 27, 2026 | — |
| CORRESP | Letter to the SEC | Mar 25, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 24, 2026 | — |
| S-3 | Shelf registration | Mar 19, 2026 | — |
| S-8 | Employee stock plan registration | Mar 19, 2026 | — |
| 10-K | Annual report | Mar 19, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 19, 2026 | Mar 19, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Dec 8, 2025 | Dec 8, 2025 |
| EFFECT | Filing | Nov 21, 2025 | — |
| 424B3 | Prospectus | Nov 21, 2025 | — |
| CORRESP | Letter to the SEC | Nov 19, 2025 | — |
| 10-Q | Quarterly report | Nov 10, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2025 | Nov 10, 2025 |
| S-3 | Shelf registration | Oct 14, 2025 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Other events
|
Aug 11, 2025 | Aug 8, 2025 |
| 424B5 | Prospectus supplement | Aug 11, 2025 | — |
| 424B5 | Prospectus supplement | Aug 11, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Aug 8, 2025 | Aug 8, 2025 |
| S-3MEF | Filing | Aug 7, 2025 | — |
| S-8 | Employee stock plan registration | Aug 6, 2025 | — |
| 10-Q | Quarterly report | Aug 6, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 6, 2025 | Aug 6, 2025 |
| 8-K |
Current report
Other events
|
Jun 25, 2025 | Jun 25, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 9, 2025 | Jun 5, 2025 |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 8, 2025 | May 8, 2025 |
| DEFA14A | Additional proxy material | Apr 23, 2025 | — |
| DEF 14A | Proxy statement | Apr 23, 2025 | Jun 5, 2025 |
| ARS | Annual report to shareholders | Apr 23, 2025 | Dec 31, 2024 |
| EFFECT | Filing | Apr 1, 2025 | — |
| CORRESP | Letter to the SEC | Mar 28, 2025 | — |
| UPLOAD | Letter from the SEC | Mar 26, 2025 | — |
| S-3 | Shelf registration | Mar 20, 2025 | — |
| 10-K | Annual report | Mar 20, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 20, 2025 | Mar 20, 2025 |
| 8-K |
Current report
Other events
|
Feb 20, 2025 | Feb 20, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Jan 3, 2025 | Dec 30, 2024 |
| 8-K |
Current report
Other events
|
Dec 26, 2024 | Dec 26, 2024 |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Dec 19, 2024 | Dec 19, 2024 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Dec 13, 2024 | Dec 12, 2024 |
| 8-K |
Current report
Material agreement
|
Nov 7, 2024 | Nov 7, 2024 |
| 424B5 | Prospectus supplement | Nov 7, 2024 | — |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2024 | Nov 7, 2024 |
| 8-K |
Current report
Other events
|
Sep 23, 2024 | Sep 23, 2024 |
| S-8 | Employee stock plan registration | Aug 8, 2024 | — |
| 10-Q | Quarterly report | Aug 8, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2024 | Aug 8, 2024 |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Jun 18, 2024 | Jun 16, 2024 |
| 424B5 | Prospectus supplement | Jun 18, 2024 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 3, 2024 | May 29, 2024 |
| 10-Q | Quarterly report | May 8, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 8, 2024 | May 8, 2024 |
| DEFA14A | Additional proxy material | Apr 17, 2024 | — |
| DEF 14A | Proxy statement | Apr 17, 2024 | May 29, 2024 |
| ARS | Annual report to shareholders | Apr 17, 2024 | Dec 31, 2023 |
| 10-K | Annual report | Mar 28, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 28, 2024 | Mar 28, 2024 |
| 8-K |
Current report
Officer or director change
|
Mar 15, 2024 | Mar 12, 2024 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Other events
|
Feb 13, 2024 | Feb 8, 2024 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Feb 2, 2024 | Jan 31, 2024 |
| 8-K |
Current report
Agreement ended
|
Jan 17, 2024 | Jan 11, 2024 |
| DEFA14A | Additional proxy material | Dec 21, 2023 | — |
| DEF 14A | Proxy statement | Dec 21, 2023 | Jan 31, 2024 |
| PRE 14A | Preliminary proxy statement | Dec 11, 2023 | Jan 31, 2024 |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 7, 2023 | Dec 1, 2023 |
| 10-Q | Quarterly report | Nov 8, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2023 | Nov 8, 2023 |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Oct 17, 2023 | Oct 15, 2023 |
| 8-K |
Current report
Listing notice
|
Sep 29, 2023 | Sep 27, 2023 |
| S-8 | Employee stock plan registration | Aug 9, 2023 | — |
| 10-Q | Quarterly report | Aug 9, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2023 | Aug 9, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 7, 2023 | Aug 4, 2023 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 30, 2023 | May 25, 2023 |
| 10-Q | Quarterly report | May 4, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 4, 2023 | May 4, 2023 |
| 8-K |
Current report
Other events
|
Apr 18, 2023 | Apr 18, 2023 |
| EFFECT | Filing | Apr 14, 2023 | — |
| CORRESP | Letter to the SEC | Apr 12, 2023 | — |
| DEFA14A | Additional proxy material | Apr 12, 2023 | — |
| DEF 14A | Proxy statement | Apr 12, 2023 | May 25, 2023 |
| ARS | Annual report to shareholders | Apr 12, 2023 | Dec 31, 2022 |
| PRE 14A | Preliminary proxy statement | Mar 31, 2023 | May 25, 2023 |
| UPLOAD | Letter from the SEC | Mar 24, 2023 | — |
| S-3 | Shelf registration | Mar 22, 2023 | — |
| 10-K | Annual report | Mar 22, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Mar 22, 2023 | Mar 22, 2023 |
| 8-K |
Current report
Other events
|
Feb 15, 2023 | Feb 15, 2023 |
| 8-K |
Current report
Other events
|
Dec 19, 2022 | Dec 19, 2022 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change
|
Dec 12, 2022 | Dec 6, 2022 |
| 10-Q | Quarterly report | Nov 8, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2022 | Nov 8, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Oct 5, 2022 | Oct 5, 2022 |
| S-8 | Employee stock plan registration | Aug 9, 2022 | — |
| 10-Q | Quarterly report | Aug 9, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2022 | Aug 9, 2022 |
| 8-K |
Current report
Exit or restructuring costs, Officer or director change, Regulation FD disclosure
|
Jul 20, 2022 | Jul 19, 2022 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
May 27, 2022 | May 25, 2022 |
| 8-K |
Current report
Other events
|
May 24, 2022 | May 18, 2022 |
| 10-Q | Quarterly report | May 12, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 12, 2022 | May 12, 2022 |
| DEFA14A | Additional proxy material | Apr 12, 2022 | — |
| DEF 14A | Proxy statement | Apr 12, 2022 | May 25, 2022 |
| PRE 14A | Preliminary proxy statement | Apr 1, 2022 | May 25, 2022 |
| 10-K | Annual report | Mar 11, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2022 | Mar 10, 2022 |
| 8-K |
Current report
Officer or director change
|
Feb 4, 2022 | Feb 1, 2022 |
| 8-K |
Current report
Other events
|
Jan 4, 2022 | Jan 4, 2022 |
| 10-Q | Quarterly report | Nov 4, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2021 | Nov 4, 2021 |
| 8-K |
Current report
Other events
|
Sep 1, 2021 | Sep 1, 2021 |
| S-8 | Employee stock plan registration | Aug 5, 2021 | — |
| 10-Q | Quarterly report | Aug 5, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2021 | Aug 5, 2021 |
| 8-K |
Current report
Officer or director change
|
Aug 3, 2021 | Jul 30, 2021 |
| 8-K |
Current report
Officer or director change
|
Jul 20, 2021 | Jul 19, 2021 |
| 8-K |
Current report
Officer or director change
|
Jun 1, 2021 | May 25, 2021 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 25, 2021 | May 20, 2021 |
| 10-Q | Quarterly report | May 6, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 6, 2021 | May 6, 2021 |
| DEFA14A | Additional proxy material | Apr 7, 2021 | — |
| DEF 14A | Proxy statement | Apr 7, 2021 | May 20, 2021 |
| 8-K |
Current report
Other events
|
Feb 26, 2021 | Feb 26, 2021 |
| 10-K | Annual report | Feb 25, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Feb 25, 2021 | Feb 25, 2021 |
| 8-K |
Current report
Officer or director change
|
Feb 17, 2021 | Feb 11, 2021 |
| UPLOAD | Letter from the SEC | Feb 11, 2021 | — |
| 8-K |
Current report
Bylaw or fiscal year change, Other events
|
Jan 27, 2021 | Jan 21, 2021 |
| CORRESP | Letter to the SEC | Jan 12, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 29, 2020 | — |
| 8-K |
Current report
Exit or restructuring costs, Officer or director change
|
Dec 8, 2020 | Dec 2, 2020 |
| 8-K |
Current report
Other events
|
Nov 17, 2020 | Nov 16, 2020 |
| 10-Q | Quarterly report | Nov 5, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 5, 2020 | Nov 5, 2020 |
| 8-K |
Current report
Officer or director change
|
Oct 21, 2020 | Oct 19, 2020 |
| EFFECT | Filing | Sep 4, 2020 | — |
| CORRESP | Letter to the SEC | Sep 3, 2020 | — |
| UPLOAD | Letter from the SEC | Sep 2, 2020 | — |
| S-8 | Employee stock plan registration | Aug 28, 2020 | — |
| S-3 | Shelf registration | Aug 28, 2020 | — |
| 8-K |
Current report
Other events
|
Aug 27, 2020 | Aug 27, 2020 |
| 10-Q | Quarterly report | Aug 5, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2020 | Aug 5, 2020 |
| 8-K |
Current report
Material agreement, Other events
|
Jul 20, 2020 | Jul 17, 2020 |
| 8-K |
Current report
Agreement ended
|
Jun 18, 2020 | Jun 12, 2020 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
Jun 16, 2020 | Jun 11, 2020 |
| DEFA14A | Additional proxy material | May 19, 2020 | — |
| 10-Q | Quarterly report | May 8, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
May 7, 2020 | May 7, 2020 |
| DEFA14A | Additional proxy material | Apr 27, 2020 | — |
| DEF 14A | Proxy statement | Apr 27, 2020 | Jun 11, 2020 |
| PRE 14A | Preliminary proxy statement | Apr 16, 2020 | Jun 11, 2020 |
| 10-K | Annual report | Mar 4, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Mar 4, 2020 | Mar 4, 2020 |
| SEC STAFF LETTER | Filing | Feb 26, 2020 | — |
| 8-K |
Current report
Officer or director change
|
Feb 11, 2020 | Feb 6, 2020 |
| SEC STAFF LETTER | Filing | Feb 11, 2020 | — |
| 8-K |
Current report
Other events
|
Jan 3, 2020 | Jan 1, 2020 |
| 8-K |
Current report
Material agreement
|
Dec 16, 2019 | Dec 11, 2019 |
| 424B5 | Prospectus supplement | Dec 13, 2019 | — |
| 424B5 | Prospectus supplement | Dec 11, 2019 | — |
| 8-K |
Current report
Other events
|
Nov 12, 2019 | Nov 11, 2019 |
| S-8 | Employee stock plan registration | Nov 7, 2019 | — |
| 10-Q | Quarterly report | Nov 7, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2019 | Nov 7, 2019 |
| 8-K |
Current report
Officer or director change
|
Oct 28, 2019 | Oct 28, 2019 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change
|
Aug 9, 2019 | Aug 6, 2019 |
| S-8 | Employee stock plan registration | Aug 5, 2019 | — |
| 10-Q | Quarterly report | Aug 5, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2019 | Aug 5, 2019 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 21, 2019 | May 17, 2019 |
| 10-Q | Quarterly report | May 9, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Results of operations
|
May 9, 2019 | May 9, 2019 |
| 8-K |
Current report
Officer or director change
|
May 2, 2019 | Apr 30, 2019 |
| 8-K |
Current report
Officer or director change
|
Apr 22, 2019 | Apr 17, 2019 |
| DEFA14A | Additional proxy material | Apr 4, 2019 | — |
| DEF 14A | Proxy statement | Apr 4, 2019 | May 17, 2019 |
| 10-K | Annual report | Feb 28, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 28, 2019 | Feb 28, 2019 |
| 10-Q | Quarterly report | Nov 8, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2018 | Nov 8, 2018 |
| 8-K |
Current report
Officer or director change
|
Oct 12, 2018 | Oct 10, 2018 |
| S-8 | Employee stock plan registration | Aug 8, 2018 | — |
| 10-Q | Quarterly report | Aug 8, 2018 | Jun 30, 2018 |
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)
Other Pharmaceutical Preparations companies
- ELI LILLY & Co LLY
- Johnson & Johnson JNJ
- AbbVie Inc. ABBV
- Merck & Co., Inc. MRK
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- Astrazeneca PLC AZN
- Abbott Laboratories ABT
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.