ALTIMMUNE, INC. Subsidiaries
Every subsidiary the company listed in Exhibit 21 of its annual reports, newest list first (14 lists). Names and jurisdictions are as filed.
- 2026-03-06: Subsidiary Altimmune, LLC; Jurisdiction Delaware.
- 2026-03-06: Subsidiary Altimmune UK, Limited; Jurisdiction United Kingdom.
- 2026-03-06: Subsidiary Spitfire Pharma, LLC; Jurisdiction Delaware.
- 2026-03-06: Subsidiary Altimmune AU Pty, Limited; Jurisdiction Australia.
| Annual report filed | Subsidiary | Jurisdiction |
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| 2026-03-06 | Altimmune, LLC | Delaware |
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| 2026-03-06 | Altimmune UK, Limited | United Kingdom |
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| 2026-03-06 | Spitfire Pharma, LLC | Delaware |
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| 2026-03-06 | Altimmune AU Pty, Limited | Australia |
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| 2026-03-06 | Wholly owned subsidiary of the Company | |
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| 2025-02-27 | Altimmune, LLC | Delaware |
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| 2025-02-27 | Altimmune UK, Limited | United Kingdom |
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| 2025-02-27 | Spitfire Pharma, LLC | Delaware |
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| 2025-02-27 | Altimmune AU Pty, Limited | Australia |
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| 2025-02-27 | Wholly owned subsidiary of the Company | |
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| 2024-03-27 | Altimmune, LLC | Delaware |
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| 2024-03-27 | Altimmune UK, Limited | United Kingdom |
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| 2024-03-27 | Spitfire Pharma, LLC | Delaware |
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| 2024-03-27 | Altimmune AU Pty, Limited | Australia |
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| 2024-03-27 | Wholly owned subsidiary of the Company | |
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| 2023-02-28 | Altimmune, LLC | Delaware |
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| 2023-02-28 | Altimmune UK, Limited | United Kingdom |
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| 2023-02-28 | Spitfire Pharma, LLC | Delaware |
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| 2023-02-28 | Altimmune AU Pty, Limited | Australia |
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| 2023-02-28 | Wholly owned subsidiary of the Company | |
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| 2022-03-15 | Altimmune, LLC | Delaware |
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| 2022-03-15 | Altimmune UK, Limited | United Kingdom |
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| 2022-03-15 | Spitfire Pharma, LLC | Delaware |
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| 2022-03-15 | Altimmune AU Pty, Limited | Australia |
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| 2022-03-15 | Wholly owned subsidiary of the Company | |
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| 2021-02-25 | Altimmune, LLC | Delaware |
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| 2021-02-25 | Altimmune UK, Limited | United Kingdom |
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| 2021-02-25 | Spitfire Pharma, LLC | Delaware |
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| 2021-02-25 | Altimmune AU Pty, Limited | Australia |
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| 2021-02-25 | Wholly owned subsidiary of the Company | |
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| 2020-03-27 | Mustang Merger Sub II LLC | Delaware |
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| 2020-03-27 | Altimmune UK Limited | United Kingdom |
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| 2020-03-27 | Spitfire Pharma, LLC | Delaware |
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| 2020-03-27 | Wholly owned subsidiary of the Company | |
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| 2019-04-01 | Mustang Merger Sub II LLC | Delaware |
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| 2019-04-01 | Altimmune UK Limited | United Kingdom |
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| 2019-04-01 | Wholly owned subsidiary of the Company | |
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| 2018-04-02 | Mustang Merger Sub II LLC | Delaware |
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| 2018-04-02 | Altimmune UK Limited | United Kingdom |
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| 2018-04-02 | Wholly owned subsidiary of the Company | |
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| 2016-03-11 | PharmAthene UK Limited | |
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| 2015-03-11 | PharmAthene UK Limited | |
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| 2011-03-31 | Unassociated Document | |
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| 2011-03-31 | PharmAthene UK Limited | |
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| 2011-03-31 | PharmAthene Canada, Inc. | |
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| 2010-03-26 | PharmAthene | |
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| 2010-03-26 | UK Limited | |
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| 2010-03-26 | PharmAthene | |
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| 2010-03-26 | Canada, Inc. | |
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| 2009-03-31 | PharmAthene UK Limited | |
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| 2009-03-31 | PharmAthene Canada, Inc. | |
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