Company · CIK 1326190

# Altimmune, Inc.

| CIK | [1326190](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001326190) (SEC EDGAR) |
| --- | --- |
| Industry (SIC) | 2834 — Pharmaceutical Preparations |
| Incorporated in | DE |
| Business address | MD |
| Listed | ALT (Nasdaq) |
| First annual or quarterly report | 2005-09-12 |

## Offerings

 15 registrations

| Registration | Label and status | First filed | Last event | Filings |
| --- | --- | --- | --- | --- |
| 333-291329 | Shelf Effective | 2025-11-06 | 2026-04-24 | 5 |
| 333-285355 | Shelf Effective | 2025-02-27 | 2025-11-06 | 3 |
| 333-270124 | Shelf Effective | 2023-02-28 | 2023-02-28 | 1 |
| 333-251858 | Shelf Effective | 2020-12-31 | 2021-02-25 | 3 |
| 333-230723 | Shelf Effective | 2019-04-04 | 2020-07-15 | 6 |
| 333-217034 | Shelf Effective | 2017-03-30 | 2018-10-09 | 6 |
| 333-226441 | Registered company Final prospectus | 2018-07-30 | 2018-10-01 | 5 |
| 333-196265 | Shelf Effective | 2014-05-23 | 2014-05-30 | 2 |
| 333-175394 | Shelf Effective | 2011-07-07 | 2014-05-23 | 4 |
| 333-176607 | Shelf Effective | 2011-09-01 | 2011-09-21 | 2 |
| 333-156997 | Shelf Final prospectus | 2009-01-28 | 2010-11-01 | 8 |
| 333-161587 | Shelf Effective | 2009-08-27 | 2009-11-25 | 2 |
| 333-124712 | First-time registration Effective | 2005-05-06 | 2009-02-10 | 6 |
| 333-155692 | Shelf Effective | 2008-11-25 | 2009-02-10 | 2 |
| 333-146463 | Shelf Effective | 2007-10-02 | 2008-01-29 | 2 |

## Filings

 59

| Filed | Filing | Registration | Accession |
| --- | --- | --- | --- |
| 2026-04-24 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000110465926047979/0001104659-26-047979-index.htm) Shelf takedown | 333-291329 | 0001104659-26-047979 |
| 2026-04-22 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000132619026000031/0001326190-26-000031-index.htm) Shelf takedown | 333-291329 | 0001326190-26-000031 |
| 2026-01-28 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000132619026000004/0001326190-26-000004-index.htm) Shelf takedown | 333-291329 | 0001326190-26-000004 |
| 2025-12-05 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999525003552/9999999995-25-003552-index.htm) Declared effective | 333-291329 | 9999999995-25-003552 |
| 2025-11-06 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000132619025000070/0001326190-25-000070-index.htm) Shelf registered | 333-291329 | 0001326190-25-000070 |
| 2025-11-06 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000132619025000066/0001326190-25-000066-index.htm) Shelf takedown | 333-285355 | 0001326190-25-000066 |
| 2025-03-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999525000663/9999999995-25-000663-index.htm) Declared effective | 333-285355 | 9999999995-25-000663 |
| 2025-02-27 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000132619025000019/0001326190-25-000019-index.htm) Shelf registered | 333-285355 | 0001326190-25-000019 |
| 2023-02-28 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1326190/000132619023000013/0001326190-23-000013-index.htm) Shelf registered | 333-270124 | 0001326190-23-000013 |
| 2021-02-25 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312521055820/0001193125-21-055820-index.htm) Shelf takedown | 333-251858 | 0001193125-21-055820 |
| 2021-01-11 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999521000116/9999999995-21-000116-index.htm) Declared effective | 333-251858 | 9999999995-21-000116 |
| 2020-12-31 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000119312520330627/0001193125-20-330627-index.htm) Shelf registered | 333-251858 | 0001193125-20-330627 |
| 2020-07-15 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312520192791/0001193125-20-192791-index.htm) Shelf takedown | 333-230723 | 0001193125-20-192791 |
| 2020-07-13 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312520191866/0001193125-20-191866-index.htm) Shelf takedown | 333-230723 | 0001193125-20-191866 |
| 2020-06-01 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312520156472/0001193125-20-156472-index.htm) Shelf takedown | 333-230723 | 0001193125-20-156472 |
| 2020-03-27 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312520087649/0001193125-20-087649-index.htm) Shelf takedown | 333-230723 | 0001193125-20-087649 |
| 2019-04-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999519000701/9999999995-19-000701-index.htm) Declared effective | 333-230723 | 9999999995-19-000701 |
| 2019-04-04 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000119312519097996/0001193125-19-097996-index.htm) Shelf registered | 333-230723 | 0001193125-19-097996 |
| 2018-10-09 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312518296082/0001193125-18-296082-index.htm) Shelf takedown | 333-217034 | 0001193125-18-296082 |
| 2018-10-09 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312518295424/0001193125-18-295424-index.htm) Shelf takedown | 333-217034 | 0001193125-18-295424 |
| 2018-10-01 | [424B4](https://www.sec.gov/Archives/edgar/data/1326190/000119312518289729/0001193125-18-289729-index.htm) Final prospectus | 333-226441 | 0001193125-18-289729 |
| 2018-09-27 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999518002478/9999999995-18-002478-index.htm) Declared effective | 333-226441 | 9999999995-18-002478 |
| 2018-09-26 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1326190/000119312518284095/0001193125-18-284095-index.htm) Amendment | 333-226441 | 0001193125-18-284095 |
| 2018-09-24 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312518280966/0001193125-18-280966-index.htm) Shelf takedown | 333-217034 | 0001193125-18-280966 |
| 2018-08-17 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1326190/000119312518251733/0001193125-18-251733-index.htm) Amendment | 333-226441 | 0001193125-18-251733 |
| 2018-07-30 | [S-1](https://www.sec.gov/Archives/edgar/data/1326190/000119312518231679/0001193125-18-231679-index.htm) Registration filed | 333-226441 | 0001193125-18-231679 |
| 2017-08-18 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000119312517262341/0001193125-17-262341-index.htm) Shelf takedown | 333-217034 | 0001193125-17-262341 |
| 2017-04-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999517000756/9999999995-17-000756-index.htm) Declared effective | 333-217034 | 9999999995-17-000756 |
| 2017-03-31 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999517000715/9999999995-17-000715-index.htm) Declared effective | 333-215891 | 9999999995-17-000715 |
| 2017-03-30 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000114420417017592/0001144204-17-017592-index.htm) Shelf registered | 333-217034 | 0001144204-17-017592 |
| 2014-05-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999514001631/9999999995-14-001631-index.htm) Declared effective | 333-196265 | 9999999995-14-001631 |
| 2014-05-23 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000114420414033496/0001144204-14-033496-index.htm) Shelf takedown | 333-175394 | 0001144204-14-033496 |
| 2014-05-23 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000114420414033489/0001144204-14-033489-index.htm) Shelf registered | 333-196265 | 0001144204-14-033489 |
| 2013-10-29 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999513003102/9999999995-13-003102-index.htm) Declared effective | 333-191055 | 9999999995-13-003102 |
| 2013-03-25 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000114420413017298/0001144204-13-017298-index.htm) Shelf takedown | 333-175394 | 0001144204-13-017298 |
| 2011-09-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999511002774/9999999995-11-002774-index.htm) Declared effective | 333-176607 | 9999999995-11-002774 |
| 2011-09-01 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000114420411050881/0001144204-11-050881-index.htm) Shelf registered | 333-176607 | 0001144204-11-050881 |
| 2011-07-27 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999511002295/9999999995-11-002295-index.htm) Declared effective | 333-175394 | 9999999995-11-002295 |
| 2011-07-07 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000114420411039625/0001144204-11-039625-index.htm) Shelf registered | 333-175394 | 0001144204-11-039625 |
| 2010-11-01 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000114420410056607/0001144204-10-056607-index.htm) Shelf takedown | 333-156997 | 0001144204-10-056607 |
| 2010-10-29 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000114420410056194/0001144204-10-056194-index.htm) Shelf takedown | 333-156997 | 0001144204-10-056194 |
| 2010-07-21 | [424B4](https://www.sec.gov/Archives/edgar/data/1326190/000114420410038714/0001144204-10-038714-index.htm) Final prospectus | 333-156997 | 0001144204-10-038714 |
| 2010-04-08 | [424B4](https://www.sec.gov/Archives/edgar/data/1326190/000114420410019093/0001144204-10-019093-index.htm) Final prospectus | 333-156997 | 0001144204-10-019093 |
| 2009-11-25 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999509003296/9999999995-09-003296-index.htm) Declared effective | 333-161587 | 9999999995-09-003296 |
| 2009-08-27 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000110465909052139/0001104659-09-052139-index.htm) Shelf registered | 333-161587 | 0001104659-09-052139 |
| 2009-03-26 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000104746909003233/0001047469-09-003233-index.htm) Shelf takedown | 333-156997 | 0001047469-09-003233 |
| 2009-03-25 | [424B5](https://www.sec.gov/Archives/edgar/data/1326190/000104746909003146/0001047469-09-003146-index.htm) Shelf takedown | 333-156997 | 0001047469-09-003146 |
| 2009-02-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999509000384/9999999995-09-000384-index.htm) Declared effective | 333-156997 | 9999999995-09-000384 |
| 2009-02-10 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999509000343/9999999995-09-000343-index.htm) Declared effective | 333-155692 | 9999999995-09-000343 |
| 2009-02-10 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999509000336/9999999995-09-000336-index.htm) Declared effective | 333-124712 | 9999999995-09-000336 |
| 2009-01-28 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000110465909004654/0001104659-09-004654-index.htm) Shelf registered | 333-156997 | 0001104659-09-004654 |
| 2008-11-25 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000110465908073075/0001104659-08-073075-index.htm) Shelf registered | 333-155692 | 0001104659-08-073075 |
| 2008-01-29 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1326190/999999999508000327/9999999995-08-000327-index.htm) Declared effective | 333-146463 | 9999999995-08-000327 |
| 2007-10-02 | [S-3](https://www.sec.gov/Archives/edgar/data/1326190/000119380507002511/0001193805-07-002511-index.htm) Shelf registered | 333-146463 | 0001193805-07-002511 |
| 2005-07-27 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1326190/000112528205003892/0001125282-05-003892-index.htm) Amendment | 333-124712 | 0001125282-05-003892 |
| 2005-07-26 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1326190/000095011605002520/0000950116-05-002520-index.htm) Amendment | 333-124712 | 0000950116-05-002520 |
| 2005-07-12 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1326190/000112528205003665/0001125282-05-003665-index.htm) Amendment | 333-124712 | 0001125282-05-003665 |
| 2005-06-10 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1326190/000114420405018564/0001144204-05-018564-index.htm) Amendment | 333-124712 | 0001144204-05-018564 |
| 2005-05-06 | [S-1](https://www.sec.gov/Archives/edgar/data/1326190/000114420405014353/0001144204-05-014353-index.htm) Registration filed | 333-124712 | 0001144204-05-014353 |

[All filings of this company](https://equitycapital.markets/filings?cik=1326190) · [CSV](https://equitycapital.markets/filings.csv?cik=1326190)

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Source page: https://equitycapital.markets/company/1326190 · Data: U.S. SEC EDGAR · CC BY 4.0