Altimmune, Inc. SEC filings ALT
Altimmune, Inc. has 1,005 filings in SEC EDGAR's recent list, going back to Jan 31, 2011. Its latest annual report, Form ARS, was filed on Mar 17, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 12, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 29, 2026 (new debt). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| DEF 14A | Proxy statement | Mar 17, 2026 | Apr 16, 2026 |
| PRE 14A | Preliminary proxy statement | Mar 6, 2026 | Apr 16, 2026 |
| DEF 14A | Proxy statement | Aug 15, 2025 | Sep 25, 2025 |
| DEF 14A | Proxy statement | Aug 15, 2024 | Sep 26, 2024 |
| DEF 14A | Proxy statement | Aug 16, 2023 | Sep 28, 2023 |
| DEF 14A | Proxy statement | Aug 16, 2022 | Sep 29, 2022 |
| DEF 14A | Proxy statement | Aug 16, 2021 | Sep 23, 2021 |
| DEF 14A | Proxy statement | Aug 21, 2020 | Sep 24, 2020 |
| DEF 14A | Proxy statement | Aug 22, 2019 | Sep 26, 2019 |
| PRE 14A | Preliminary proxy statement | Aug 9, 2019 | Sep 26, 2019 |
| DEF 14A | Proxy statement | Jul 26, 2018 | Aug 30, 2018 |
| PRE 14A | Preliminary proxy statement | Jul 16, 2018 | Aug 30, 2018 |
| DEFA14A | Additional proxy material | Sep 1, 2017 | — |
| DEF 14A | Proxy statement | Sep 1, 2017 | Oct 13, 2017 |
| PRE 14A | Preliminary proxy statement | Aug 21, 2017 | Oct 13, 2017 |
| DEF 14A | Proxy statement | Apr 29, 2016 | Jun 1, 2016 |
| PRE 14A | Preliminary proxy statement | Apr 19, 2016 | Apr 19, 2016 |
| DEF 14A | Proxy statement | Apr 30, 2015 | Jun 10, 2015 |
| DEF 14A | Proxy statement | May 8, 2014 | Jun 11, 2014 |
| DEFA14A | Additional proxy material | Oct 30, 2013 | — |
| DEF 14A | Proxy statement | Apr 30, 2013 | Jun 11, 2013 |
| DEF 14A | Proxy statement | Apr 30, 2012 | Jun 22, 2012 |
| DEF 14A | Proxy statement | Nov 7, 2011 | Dec 7, 2011 |
Showing 23 filings. 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
- ALT (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Morristown, NJ
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1326190
- Former names
- PHARMATHENE, INC (until May 3, 2017); HEALTHCARE ACQUISITION CORP (until Oct 15, 2007)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.