Altimmune SEC Filings
NASDAQ: ALTHealth CareBiotechnology: Pharmaceutical PreparationsUSD
2.61+0.01 (+0.38%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Altimmune filing overview
This page lists 60 recent SEC filings by Altimmune (ALT), including 35 4, 10 8-K, 5 SCHEDULE 13G, 3 SCHEDULE 13G/A. The latest annual report (10-K) was filed on Mar 6, 2026 for the period ending Dec 31, 2025. The most recent quarterly report (10-Q) was filed on Aug 12, 2026.
The latest current report (8-K), used to disclose material events such as earnings releases and executive changes, was filed on Sep 29, 2026. Form 10-K is the audited annual report, 10-Q the quarterly report, 8-K covers material events, and Form 4 reports insider transactions. All documents link directly to SEC EDGAR.
Summary generated from market data by MetaCap's automated system. Methodology
ALT SEC filings
| Filed | Form | Description | Document |
|---|---|---|---|
| Oct 5, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 5, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Oct 2, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Sep 29, 2026 | 8-K | Departure or Appointment of Directors or Officers; Compensatory Arrangements | View on EDGAR |
| Sep 17, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 13, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 12, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Aug 12, 2026 | 10-Q | Quarterly report | View on EDGAR |
| Aug 3, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 3, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jul 28, 2026 | 8-K | Regulation FD Disclosure; Other Events | View on EDGAR |
| Jun 16, 2026 | 8-K | Other Events | View on EDGAR |
| May 15, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| May 13, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| May 13, 2026 | 10-Q | Quarterly report | View on EDGAR |
| May 12, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| May 1, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| May 1, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 1, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| May 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 30, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Apr 24, 2026 | 424B5 | Prospectus | View on EDGAR |
| Apr 24, 2026 | 8-K | Entry into a Material Definitive Agreement | View on EDGAR |
| Apr 22, 2026 | 424B5 | Prospectus | View on EDGAR |
| Apr 16, 2026 | 8-K | Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year; Submission of Matters to a Vote of Security Holders | View on EDGAR |
| Apr 6, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 1, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Mar 26, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Mar 17, 2026 | DEF 14A | Definitive proxy statement | View on EDGAR |
| Mar 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Mar 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Mar 6, 2026 | 10-K | Annual report | View on EDGAR |
| Mar 5, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Feb 27, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 27, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 3, 2026 | 8-K | Other Events | View on EDGAR |
| Feb 3, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 2, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 2, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 30, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Jan 29, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 29, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 29, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 28, 2026 | 424B5 | Prospectus | View on EDGAR |
| Jan 28, 2026 | 8-K | Entry into a Material Definitive Agreement | View on EDGAR |
| Jan 27, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 27, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 27, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 5, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Jan 5, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Dec 29, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |