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 |
|---|---|---|---|
| S-8 | Employee stock plan registration | May 13, 2026 | — |
| 424B5 | Prospectus supplement | Apr 24, 2026 | — |
| S-3MEF | Filing | Apr 22, 2026 | — |
| 424B5 | Prospectus supplement | Apr 22, 2026 | — |
| S-8 | Employee stock plan registration | Feb 6, 2026 | — |
| 424B5 | Prospectus supplement | Jan 28, 2026 | — |
| S-3/A | Filing | Nov 13, 2025 | — |
| S-3 | Shelf registration | Nov 6, 2025 | — |
| 424B5 | Prospectus supplement | Nov 6, 2025 | — |
| S-3 | Shelf registration | Feb 27, 2025 | — |
| S-8 | Employee stock plan registration | Feb 27, 2025 | — |
| S-8 | Employee stock plan registration | Mar 27, 2024 | — |
| S-3ASR | Automatic shelf registration | Feb 28, 2023 | — |
| S-8 | Employee stock plan registration | Feb 28, 2023 | — |
| S-8 | Employee stock plan registration | Mar 15, 2022 | — |
| 424B5 | Prospectus supplement | Feb 25, 2021 | — |
| S-3 | Shelf registration | Dec 31, 2020 | — |
| S-8 | Employee stock plan registration | Aug 21, 2020 | — |
| 424B5 | Prospectus supplement | Jul 15, 2020 | — |
| 424B5 | Prospectus supplement | Jul 13, 2020 | — |
| 424B5 | Prospectus supplement | Jun 1, 2020 | — |
| 424B5 | Prospectus supplement | Mar 27, 2020 | — |
| S-8 | Employee stock plan registration | Aug 14, 2019 | — |
| S-3 | Shelf registration | Apr 4, 2019 | — |
| S-8 | Employee stock plan registration | Apr 4, 2019 | — |
| 424B2 | Prospectus | Mar 11, 2019 | — |
| S-8 | Employee stock plan registration | Nov 30, 2018 | — |
| 424B5 | Prospectus supplement | Oct 9, 2018 | — |
| 424B5 | Prospectus supplement | Oct 9, 2018 | — |
| 424B4 | Prospectus | Oct 1, 2018 | — |
| S-1/A | Amended registration statement | Sep 26, 2018 | — |
| 424B5 | Prospectus supplement | Sep 24, 2018 | — |
| S-1/A | Amended registration statement | Aug 17, 2018 | — |
| S-1 | Registration statement | Jul 30, 2018 | — |
| 424B5 | Prospectus supplement | Aug 18, 2017 | — |
| S-8 | Employee stock plan registration | May 10, 2017 | — |
| 424B3 | Prospectus | Apr 3, 2017 | — |
| S-4/A | Filing | Mar 31, 2017 | — |
| S-3 | Shelf registration | Mar 30, 2017 | — |
| S-4/A | Filing | Mar 30, 2017 | — |
| S-4 | Registration for a merger or exchange | Feb 3, 2017 | — |
| 424B3 | Prospectus | Jan 9, 2017 | — |
| S-8 | Employee stock plan registration | Nov 22, 2016 | — |
| 424B5 | Prospectus supplement | May 23, 2014 | — |
| S-3 | Shelf registration | May 23, 2014 | — |
| 424B3 | Prospectus | Oct 30, 2013 | — |
| S-4/A | Amendment no. 1 to form s-4 | Oct 25, 2013 | — |
| S-4 | Registration for a merger or exchange | Sep 9, 2013 | — |
| 424B5 | Prospectus supplement | Mar 25, 2013 | — |
| S-3/A | Amendment to form s-3 | Sep 21, 2011 | — |
| S-3 | Shelf registration | Sep 1, 2011 | — |
| S-3 | Shelf registration | Jul 7, 2011 | — |
| 424B3 | Prospectus | Jun 10, 2011 | — |
Showing 53 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)
Other Pharmaceutical Preparations companies
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- Astrazeneca PLC AZN
- Abbott Laboratories ABT
- Novo Nordisk A S NVO
Source: SEC EDGAR filings. This is company-reported data, not investment advice.