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 |
|---|---|---|---|
| 8-K |
Current report
New debt
|
Oct 29, 2026 | Oct 27, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Oct 27, 2026 | Oct 23, 2026 |
| 8-K |
Current report
Officer or director change
|
Sep 29, 2026 | Sep 24, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2026 | Aug 12, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jul 28, 2026 | Jul 28, 2026 |
| 8-K |
Current report
Other events
|
Jun 16, 2026 | Jun 16, 2026 |
| 8-K |
Current report
Results of operations
|
May 13, 2026 | May 13, 2026 |
| 8-K |
Current report
Material agreement
|
Apr 24, 2026 | Apr 22, 2026 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Apr 16, 2026 | Apr 16, 2026 |
| 8-K |
Current report
Results of operations
|
Mar 5, 2026 | Mar 5, 2026 |
| 8-K |
Current report
Other events
|
Feb 3, 2026 | Feb 2, 2026 |
| 8-K |
Current report
Material agreement
|
Jan 28, 2026 | Jan 27, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Dec 19, 2025 | Dec 19, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 1, 2025 | Nov 30, 2025 |
| 8-K |
Current report
Material agreement, Agreement ended
|
Nov 6, 2025 | Nov 6, 2025 |
| 8-K |
Current report
Material agreement, Results of operations, New debt
|
Nov 6, 2025 | Nov 6, 2025 |
| 8-K |
Current report
Officer or director change
|
Oct 3, 2025 | Oct 1, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Sep 25, 2025 | Sep 25, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2025 | Aug 12, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 26, 2025 | Jun 26, 2025 |
| 8-K |
Current report
Material agreement, Results of operations, New debt, Regulation FD disclosure
|
May 13, 2025 | May 13, 2025 |
| 8-K |
Current report
Other events
|
Mar 13, 2025 | Mar 13, 2025 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Feb 27, 2025 | Feb 24, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 25, 2025 | Feb 24, 2025 |
| 8-K |
Current report
Other events
|
Dec 11, 2024 | Nov 15, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2024 | Nov 12, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Nov 12, 2024 | Nov 11, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Sep 26, 2024 | Sep 26, 2024 |
| 8-K |
Current report
Officer or director change
|
Aug 15, 2024 | Aug 13, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2024 | Aug 8, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 26, 2024 | Jun 25, 2024 |
| 8-K |
Current report
Results of operations
|
May 9, 2024 | May 9, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
Mar 27, 2024 | Mar 27, 2024 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Nov 30, 2023 | Nov 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2023 | Nov 7, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Sep 28, 2023 | Sep 28, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2023 | Aug 10, 2023 |
| 8-K |
Current report
Results of operations
|
May 11, 2023 | May 11, 2023 |
| 8-K |
Current report
Officer or director change
|
Mar 27, 2023 | Mar 23, 2023 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Mar 21, 2023 | Mar 21, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 28, 2023 | Feb 28, 2023 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Dec 20, 2022 | Dec 20, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2022 | Nov 10, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Sep 29, 2022 | Sep 29, 2022 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 14, 2022 | Sep 14, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2022 | Aug 11, 2022 |
| 8-K |
Current report
Results of operations
|
May 12, 2022 | May 12, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 15, 2022 | Mar 15, 2022 |
| 8-K |
Current report
Agreement ended
|
Dec 17, 2021 | Dec 17, 2021 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 13, 2021 | Dec 9, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2021 | Nov 9, 2021 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 28, 2021 | Sep 28, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Sep 24, 2021 | Sep 23, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2021 | Aug 10, 2021 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 29, 2021 | Jun 29, 2021 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 16, 2021 | Jun 16, 2021 |
| 8-K |
Current report
Results of operations
|
May 17, 2021 | May 17, 2021 |
| 8-K |
Current report
Other events
|
Apr 1, 2021 | Apr 1, 2021 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Mar 12, 2021 | Mar 9, 2021 |
| 8-K |
Current report
Material agreement
|
Feb 25, 2021 | Feb 25, 2021 |
| 8-K |
Current report
Material agreement, Results of operations, Unregistered share sale, Other events
|
Feb 25, 2021 | Feb 25, 2021 |
| 8-K |
Current report
Other events
|
Dec 23, 2020 | Dec 23, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2020 | Nov 9, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Sep 25, 2020 | Sep 24, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2020 | Aug 11, 2020 |
| 8-K/A |
Amended current report
Officer or director change
|
Jul 16, 2020 | May 11, 2020 |
| 8-K |
Current report
Material agreement, Results of operations, Other events
|
Jul 16, 2020 | Jul 13, 2020 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jul 13, 2020 | Jul 13, 2020 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 1, 2020 | Jun 1, 2020 |
| 8-K |
Current report
Results of operations
|
May 13, 2020 | May 13, 2020 |
| 8-K |
Current report
Officer or director change
|
May 12, 2020 | May 11, 2020 |
| 8-K |
Current report
Material agreement
|
Apr 8, 2020 | Apr 2, 2020 |
| 8-K |
Current report
Material agreement
|
Mar 27, 2020 | Mar 27, 2020 |
| 8-K |
Current report
Results of operations
|
Mar 27, 2020 | Mar 27, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2019 | Nov 13, 2019 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Oct 1, 2019 | Sep 26, 2019 |
| 8-K |
Current report
Material agreement
|
Aug 21, 2019 | Aug 20, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 13, 2019 | Aug 13, 2019 |
| 8-K |
Current report
Acquisition or sale of assets, Unregistered share sale, Regulation FD disclosure
|
Jul 15, 2019 | Jul 12, 2019 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Jul 9, 2019 | Jul 8, 2019 |
| 8-K |
Current report
Officer or director change
|
Jun 21, 2019 | Jun 17, 2019 |
| 8-K |
Current report
Officer or director change
|
Jun 12, 2019 | Jun 10, 2019 |
| 8-K |
Current report
Officer or director change
|
Jun 7, 2019 | Jun 3, 2019 |
| 8-K |
Current report
Results of operations
|
May 14, 2019 | May 14, 2019 |
| 8-K |
Current report
Results of operations
|
Apr 1, 2019 | Apr 1, 2019 |
| 8-K |
Current report
Officer or director change
|
Mar 15, 2019 | Mar 14, 2019 |
| 8-K |
Current report
Material agreement, Other events
|
Mar 11, 2019 | Mar 8, 2019 |
| 8-K |
Current report
Results of operations, Other events
|
Mar 8, 2019 | Mar 8, 2019 |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 3, 2018 | Nov 28, 2018 |
| 8-K |
Current report
Other events
|
Nov 30, 2018 | Nov 30, 2018 |
| 8-K |
Current report
Officer or director change
|
Nov 27, 2018 | Nov 27, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2018 | Nov 13, 2018 |
| 8-K |
Current report
Officer or director change
|
Oct 22, 2018 | Oct 16, 2018 |
| 8-K |
Current report
Material agreement, Other events
|
Oct 9, 2018 | Oct 8, 2018 |
| 8-K |
Current report
Other events
|
Oct 1, 2018 | Sep 28, 2018 |
| 8-K |
Current report
Material agreement, Other events
|
Sep 25, 2018 | Sep 24, 2018 |
| 8-K |
Current report
Material agreement, Other events
|
Sep 24, 2018 | Sep 24, 2018 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Sep 13, 2018 | Sep 13, 2018 |
| 8-K |
Current report
Other events
|
Sep 12, 2018 | Sep 12, 2018 |
| 8-K |
Current report
Other events
|
Sep 4, 2018 | Sep 4, 2018 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
Aug 31, 2018 | Aug 30, 2018 |
| 8-K |
Current report
Results of operations
|
Aug 14, 2018 | Aug 14, 2018 |
| 8-K |
Current report
Material agreement, Agreement ended, Unregistered share sale, Change to shareholder rights, Other events
|
Jul 16, 2018 | Jul 11, 2018 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt, Unregistered share sale, Change to shareholder rights, Other events
|
Jun 25, 2018 | Jun 22, 2018 |
| 8-K |
Current report
Officer or director change
|
Jun 22, 2018 | Jun 18, 2018 |
| 8-K |
Current report
Listing notice
|
May 18, 2018 | May 17, 2018 |
| 8-K |
Current report
Results of operations
|
May 15, 2018 | May 15, 2018 |
| 8-K |
Current report
Officer or director change
|
May 10, 2018 | May 8, 2018 |
| 8-K |
Current report
Results of operations
|
Mar 29, 2018 | Mar 28, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2017 | Nov 9, 2017 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Shareholder vote results
|
Oct 18, 2017 | Oct 13, 2017 |
| 8-K |
Current report
Officer or director change
|
Sep 28, 2017 | Sep 22, 2017 |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Bylaw or fiscal year change, Other events
|
Aug 21, 2017 | Aug 21, 2017 |
| 8-K |
Current report
Material agreement, Other events
|
Aug 17, 2017 | Aug 16, 2017 |
| 8-K |
Current report
Other events
|
Aug 17, 2017 | Aug 17, 2017 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2017 | Aug 10, 2017 |
| 8-K/A | Amended current report | Jul 20, 2017 | May 4, 2017 |
| 8-K |
Current report
Auditor change
|
Jun 27, 2017 | Jun 22, 2017 |
| 8-K |
Current report
Other events
|
Jun 9, 2017 | Jun 9, 2017 |
| 8-K |
Current report
Other events
|
May 16, 2017 | May 16, 2017 |
| 8-K |
Current report
Other events
|
May 15, 2017 | May 15, 2017 |
| 8-K | Current report | May 10, 2017 | May 4, 2017 |
| 8-K |
Current report
Acquisition or sale of assets, Listing notice, Change to shareholder rights, Auditor change, Change in control, Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
May 8, 2017 | May 4, 2017 |
| 8-K |
Current report
Results of operations
|
May 3, 2017 | May 3, 2017 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 27, 2017 | Apr 26, 2017 |
| 8-K |
Current report
Material agreement
|
Mar 29, 2017 | Mar 29, 2017 |
| 8-K |
Current report
Results of operations, Other events
|
Mar 14, 2017 | Mar 14, 2017 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Feb 1, 2017 | Feb 1, 2017 |
| 8-K |
Current report
Material agreement, Officer or director change, Bylaw or fiscal year change, Other events
|
Jan 19, 2017 | Jan 18, 2017 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2016 | Nov 4, 2016 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2016 | Aug 4, 2016 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 7, 2016 | Jun 1, 2016 |
| 8-K |
Current report
Results of operations
|
May 9, 2016 | May 9, 2016 |
| 8-K/A |
Amended current report
Results of operations
|
Mar 11, 2016 | Mar 11, 2016 |
| 8-K |
Current report
Results of operations
|
Mar 11, 2016 | Mar 11, 2016 |
| 8-K |
Current report
Officer or director change
|
Feb 19, 2016 | Feb 15, 2016 |
| 8-K |
Current report
Officer or director change
|
Dec 9, 2015 | Dec 3, 2015 |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Bylaw or fiscal year change, Other events
|
Nov 25, 2015 | Nov 25, 2015 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2015 | Nov 6, 2015 |
| 8-K |
Current report
Officer or director change
|
Sep 3, 2015 | Sep 1, 2015 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2015 | Aug 5, 2015 |
| 8-K |
Current report
Shareholder vote results
|
Jun 12, 2015 | Jun 10, 2015 |
| 8-K |
Current report
Results of operations
|
May 7, 2015 | May 7, 2015 |
| 8-K |
Current report
Officer or director change
|
May 1, 2015 | Apr 27, 2015 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Mar 9, 2015 | Mar 9, 2015 |
| 8-K |
Current report
Other events
|
Jan 12, 2015 | Jan 7, 2015 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2014 | Nov 6, 2014 |
| 8-K |
Current report
Other events
|
Sep 19, 2014 | Sep 16, 2014 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Sep 12, 2014 | Sep 9, 2014 |
| 8-K |
Current report
Other events
|
Aug 11, 2014 | Aug 8, 2014 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2014 | Aug 4, 2014 |
| 8-K |
Current report
Shareholder vote results
|
Jun 12, 2014 | Jun 11, 2014 |
| 8-K |
Current report
Material agreement, Other events
|
May 23, 2014 | May 23, 2014 |
| 8-K |
Current report
Results of operations
|
May 8, 2014 | May 8, 2014 |
| 8-K |
Current report
Material agreement, Agreement ended, Other events
|
Apr 7, 2014 | Apr 4, 2014 |
| 8-K |
Current report
Results of operations
|
Mar 11, 2014 | Mar 11, 2014 |
| 8-K |
Current report
Officer or director change
|
Feb 5, 2014 | Jan 30, 2014 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jan 14, 2014 | Jan 10, 2014 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 16, 2013 | Dec 16, 2013 |
| 8-K |
Current report
Other events
|
Dec 3, 2013 | Dec 2, 2013 |
| 8-K |
Current report
Agreement ended, Other events
|
Dec 2, 2013 | Dec 1, 2013 |
| 8-K |
Current report
Other events
|
Nov 29, 2013 | Nov 29, 2013 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Nov 27, 2013 | Nov 27, 2013 |
| 8-K |
Current report
Other events
|
Nov 19, 2013 | Nov 19, 2013 |
| 8-K |
Current report
Other events
|
Nov 7, 2013 | Nov 7, 2013 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2013 | Nov 7, 2013 |
| 8-K |
Current report
Other events
|
Nov 4, 2013 | Nov 4, 2013 |
| 8-K |
Current report
Other events
|
Oct 8, 2013 | Oct 8, 2013 |
| 8-K |
Current report
Other events
|
Sep 11, 2013 | Sep 11, 2013 |
| 8-K |
Current report
Other events
|
Sep 10, 2013 | Sep 10, 2013 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 9, 2013 | Sep 9, 2013 |
| 8-K |
Current report
Other events
|
Sep 9, 2013 | Sep 9, 2013 |
| 8-K |
Current report
Other events
|
Sep 9, 2013 | Sep 8, 2013 |
| 8-K |
Current report
Other events
|
Sep 6, 2013 | Sep 6, 2013 |
| 8-K |
Current report
Other events
|
Aug 8, 2013 | Aug 8, 2013 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 7, 2013 | Aug 7, 2013 |
| 8-K |
Current report
Material agreement, Officer or director change, Other events
|
Aug 1, 2013 | Jul 31, 2013 |
| 8-K |
Current report
Shareholder vote results
|
Jun 17, 2013 | Jun 11, 2013 |
| 8-K |
Current report
Other events
|
May 30, 2013 | May 30, 2013 |
| 8-K |
Current report
Other events
|
May 28, 2013 | May 26, 2013 |
| 8-K |
Current report
Results of operations
|
May 8, 2013 | May 8, 2013 |
| 8-K |
Current report
Material agreement, Other events
|
Mar 25, 2013 | Mar 25, 2013 |
| 8-K |
Current report
Results of operations
|
Mar 13, 2013 | Mar 13, 2013 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2012 | Nov 6, 2012 |
| 8-K |
Current report
Officer or director change, Other events
|
Oct 19, 2012 | Oct 19, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 10, 2012 | Sep 10, 2012 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2012 | Aug 7, 2012 |
| 8-K |
Current report
Shareholder vote results
|
Jun 28, 2012 | Jun 22, 2012 |
| 8-K |
Current report
Results of operations
|
May 8, 2012 | May 8, 2012 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 3, 2012 | Mar 30, 2012 |
| 8-K |
Current report
Results of operations
|
Mar 8, 2012 | Mar 8, 2012 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Dec 13, 2011 | Dec 7, 2011 |
| 8-K |
Current report
Officer or director change
|
Dec 7, 2011 | Dec 1, 2011 |
| 8-K |
Current report
Officer or director change
|
Nov 15, 2011 | Nov 10, 2011 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2011 | Nov 9, 2011 |
| 8-K |
Current report
Officer or director change
|
Oct 6, 2011 | Sep 30, 2011 |
| 8-K |
Current report
Officer or director change
|
Sep 28, 2011 | Sep 22, 2011 |
| 8-K |
Current report
Officer or director change
|
Sep 7, 2011 | Aug 31, 2011 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 26, 2011 | Aug 22, 2011 |
| 8-K |
Current report
Results of operations
|
Aug 15, 2011 | Aug 10, 2011 |
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
- 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
- ELI LILLY & Co LLY
- Johnson & Johnson JNJ
- AbbVie Inc. ABBV
- Merck & Co., Inc. MRK
- Novartis AG NVS
- Astrazeneca PLC AZN
- Abbott Laboratories ABT
- Novo Nordisk A S NVO
Source: SEC EDGAR filings. This is company-reported data, not investment advice.