# Altimmune, Inc.: filings

ALT · Nasdaq · CIK 1326190 · [Healthcare](/sectors/healthcare.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/alt.md) · [Financials](/companies/alt/financials.md) · [Filings](/companies/alt/filings.md) · [Insiders](/companies/alt/insiders.md)

## Reports and events: 367 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 500, 8-K 242, 10-Q 53, SC 13G/A 43, 3 36, SC 13G 34, CORRESP 24, 425 23, 424B5 19, 10-K 18, DEF 14A 18, UPLOAD 17, EFFECT 15, SC 13D/A 15, CT ORDER 14, S-8 12, S-3 10, 424B3 8, ARS 7, 8-K/A 6, PRE 14A 6, 10-K/A 5, S-3/A 5, SC 13D 5, 4/A 4, SCHEDULE 13G 4, 424B4 3, PRER14A 3, S-4/A 3, SCHEDULE 13G/A 3, 10-Q/A 2, 8-A12B 2, D 2, DEFA14A 2, DEFR14A 2, S-1/A 2, S-4 2, 25 1, 25-NSE 1, 424B2 1, 5 1, CERTNAS 1, NT 10-Q 1, POS AM 1, POS EX 1, S-1 1, S-3ASR 1, S-3MEF 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-27 | 08:16 ET | [8-K](/filings/0001104659-26-118991.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-118991 |
| 2026-09-29 | 07:03 ET | [8-K](/filings/0001326190-26-000056.md) | 5.02 Departure or appointment of officers or directors | 0001326190-26-000056 |
| 2026-08-12 | 16:04 ET | [10-Q](/filings/0001326190-26-000052.md) | Quarterly report, period 2026-06-30 | 0001326190-26-000052 |
| 2026-08-12 | 07:33 ET | [8-K](/filings/0001326190-26-000049.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001326190-26-000049 |
| 2026-07-28 | 07:04 ET | [8-K](/filings/0001326190-26-000044.md) | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001326190-26-000044 |
| 2026-06-16 | 16:05 ET | [8-K](/filings/0001104659-26-074575.md) | 8.01 Other events | 0001104659-26-074575 |
| 2026-05-13 | 16:13 ET | [10-Q](/filings/0001326190-26-000040.md) | Quarterly report, period 2026-03-31 | 0001326190-26-000040 |
| 2026-05-13 | 07:34 ET | [8-K](/filings/0001326190-26-000037.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001326190-26-000037 |
| 2026-04-24 | 16:05 ET | [8-K](/filings/0001104659-26-048552.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001104659-26-048552 |
| 2026-04-16 | 17:07 ET | [8-K](/filings/0001326190-26-000027.md) | 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001326190-26-000027 |
| 2026-03-17 | 07:05 ET | [DEF 14A](/filings/0001104659-26-028953.md) | Proxy statement, period 2026-04-16 | 0001104659-26-028953 |
| 2026-03-06 | 07:56 ET | [10-K](/filings/0001326190-26-000018.md) | Annual report, period 2025-12-31 | 0001326190-26-000018 |
| 2026-03-05 | 07:08 ET | [8-K](/filings/0001326190-26-000013.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001326190-26-000013 |
| 2026-02-03 | 16:05 ET | [8-K](/filings/0001326190-26-000008.md) | 8.01 Other events | 0001326190-26-000008 |
| 2026-01-28 | 17:26 ET | [8-K](/filings/0001326190-26-000006.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001326190-26-000006 |
| 2025-12-19 | 06:30 ET | [8-K](/filings/0001104659-25-122724.md) | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-25-122724 |
| 2025-12-01 | 08:00 ET | [8-K](/filings/0001104659-25-117144.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-117144 |
| 2025-11-06 | 16:30 ET | [8-K](/filings/0001326190-25-000067.md) | 1.01 Entry into a material agreement; 1.02 Termination of a material agreement; 9.01 Financial statements and exhibits | 0001326190-25-000067 |
| 2025-11-06 | 16:10 ET | [10-Q](/filings/0001326190-25-000064.md) | Quarterly report, period 2025-09-30 | 0001326190-25-000064 |
| 2025-11-06 | 07:04 ET | [8-K](/filings/0001326190-25-000055.md) | 1.01 Entry into a material agreement; 2.02 Results of operations; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001326190-25-000055 |
| 2025-10-03 | 16:02 ET | [8-K](/filings/0001326190-25-000053.md) | 5.02 Departure or appointment of officers or directors | 0001326190-25-000053 |
| 2025-09-25 | 16:07 ET | [8-K](/filings/0001326190-25-000050.md) | 5.07 Shareholder vote results | 0001326190-25-000050 |
| 2025-08-15 | 16:11 ET | [DEF 14A](/filings/0001326190-25-000046.md) | Proxy statement, period 2025-09-25 | 0001326190-25-000046 |
| 2025-08-12 | 10:15 ET | [10-Q](/filings/0001326190-25-000040.md) | Quarterly report, period 2025-06-30 | 0001326190-25-000040 |
| 2025-08-12 | 07:10 ET | [8-K](/filings/0001558370-25-011145.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001558370-25-011145 |
| 2025-06-26 | 07:30 ET | [8-K](/filings/0001326190-25-000037.md) | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001326190-25-000037 |
| 2025-05-13 | 16:55 ET | [10-Q](/filings/0001326190-25-000034.md) | Quarterly report, period 2025-03-31 | 0001326190-25-000034 |
| 2025-05-13 | 07:04 ET | [8-K](/filings/0001326190-25-000031.md) | 1.01 Entry into a material agreement; 2.02 Results of operations; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001326190-25-000031 |
| 2025-03-13 | 16:03 ET | [8-K](/filings/0001326190-25-000024.md) | 8.01 Other events | 0001326190-25-000024 |
| 2025-02-27 | 16:30 ET | [10-K](/filings/0001326190-25-000015.md) | Annual report, period 2024-12-31 | 0001326190-25-000015 |
| 2025-02-27 | 07:05 ET | [8-K](/filings/0001326190-25-000011.md) | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001326190-25-000011 |
| 2025-02-25 | 07:32 ET | [8-K](/filings/0001326190-25-000003.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001326190-25-000003 |
| 2024-12-11 | 17:19 ET | [8-K](/filings/0001326190-24-000053.md) | 8.01 Other events | 0001326190-24-000053 |
| 2024-11-12 | 16:06 ET | [10-Q](/filings/0001326190-24-000050.md) | Quarterly report, period 2024-09-30 | 0001326190-24-000050 |
| 2024-11-12 | 07:09 ET | [8-K](/filings/0001326190-24-000047.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001326190-24-000047 |
| 2024-11-12 | 06:46 ET | [8-K](/filings/0001326190-24-000046.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001326190-24-000046 |
| 2024-09-26 | 16:45 ET | [8-K](/filings/0001326190-24-000042.md) | 5.07 Shareholder vote results | 0001326190-24-000042 |
| 2024-08-15 | 16:08 ET | [DEF 14A](/filings/0001326190-24-000038.md) | Proxy statement, period 2024-09-26 | 0001326190-24-000038 |
| 2024-08-15 | 16:03 ET | [8-K](/filings/0001326190-24-000036.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001326190-24-000036 |
| 2024-08-08 | 16:07 ET | [10-Q](/filings/0001326190-24-000030.md) | Quarterly report, period 2024-06-30 | 0001326190-24-000030 |
| 2024-08-08 | 07:04 ET | [8-K](/filings/0001326190-24-000027.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001326190-24-000027 |
| 2024-06-26 | 07:33 ET | [8-K](/filings/0001326190-24-000022.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001326190-24-000022 |
| 2024-05-09 | 16:05 ET | [10-Q](/filings/0001326190-24-000019.md) | Quarterly report, period 2024-03-31 | 0001326190-24-000019 |
| 2024-05-09 | 07:04 ET | [8-K](/filings/0001326190-24-000016.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001326190-24-000016 |
| 2024-03-27 | 16:03 ET | [10-K](/filings/0001326190-24-000010.md) | Annual report, period 2023-12-31 | 0001326190-24-000010 |
| 2024-03-27 | 07:04 ET | [8-K](/filings/0001326190-24-000006.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001326190-24-000006 |
| 2023-11-30 | 16:28 ET | [8-K](/filings/0001326190-23-000050.md) | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001326190-23-000050 |
| 2023-11-07 | 16:08 ET | [10-Q](/filings/0001326190-23-000047.md) | Quarterly report, period 2023-09-30 | 0001326190-23-000047 |
| 2023-11-07 | 07:06 ET | [8-K](/filings/0001326190-23-000044.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001326190-23-000044 |
| 2023-09-28 | 16:55 ET | [8-K](/filings/0001326190-23-000040.md) | 5.07 Shareholder vote results | 0001326190-23-000040 |

Page 1 of 8. [Older](/companies/alt/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 29, 2026, 07:04 ET. No prices; not investment advice.