# Atossa Therapeutics, Inc.: filings

ATOS · Nasdaq · CIK 1488039 · [Healthcare](/sectors/healthcare.md) · fiscal year ends Dec 31

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

## Reports and events: 298 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 (8-K 173, 4 138, 10-Q 42, CORRESP 39, S-1/A 28, UPLOAD 21, EFFECT 20, 3 19, DEF 14A 16, 424B3 15, 10-K 14, S-1 13, SC 13G 12, 424B5 10, SC 13G/A 10, PRE 14A 8, 10-Q/A 6, S-3 6, DEFA14A 5, ARS 4, FWP 4, S-8 4, 8-K/A 3, D 3, POS AM 3, 424B4 2, 4/A 2, 5 2, 8-A12B 2, D/A 2, RW 2, SCHEDULE 13G/A 2, 10-K/A 1, 424B2 1, CERTNAS 1, CT ORDER 1, DEL AM 1, S-3MEF 1, SC 13D 1, SC 13D/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-09 | 12:15 ET | [8-K](/filings/0001193125-26-418560.md) | 1.01 Entry into a material agreement; 3.03 Change to security holders’ rights; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-418560 |
| 2026-09-29 | 12:00 ET | [8-K](/filings/0001193125-26-406036.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-406036 |
| 2026-09-18 | 21:00 ET | [8-K](/filings/0001193125-26-395694.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-395694 |
| 2026-08-07 | 12:45 ET | [8-K](/filings/0001193125-26-339292.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-26-339292 |
| 2026-08-07 | 12:30 ET | [10-Q](/filings/0001193125-26-339257.md) | Quarterly report, period 2026-06-30 | 0001193125-26-339257 |
| 2026-06-11 | 12:00 ET | [8-K](/filings/0001193125-26-266717.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001193125-26-266717 |
| 2026-05-08 | 12:45 ET | [8-K](/filings/0001193125-26-213439.md) | 9.01 Financial statements and exhibits | 0001193125-26-213439 |
| 2026-05-08 | 12:30 ET | [10-Q](/filings/0001193125-26-213423.md) | Quarterly report, period 2026-03-31 | 0001193125-26-213423 |
| 2026-05-08 | 12:00 ET | [8-K](/filings/0001193125-26-213373.md) | 5.07 Shareholder vote results | 0001193125-26-213373 |
| 2026-04-16 | 12:30 ET | [8-K](/filings/0001193125-26-158030.md) | 8.01 Other events | 0001193125-26-158030 |
| 2026-03-30 | 21:30 ET | [DEF 14A](/filings/0001193125-26-131807.md) | Proxy statement, period 2026-03-30 | 0001193125-26-131807 |
| 2026-03-25 | 21:21 ET | [10-K](/filings/0001193125-26-124396.md) | Annual report, period 2025-12-31 | 0001193125-26-124396 |
| 2026-03-25 | 21:20 ET | [8-K](/filings/0001193125-26-124393.md) | 9.01 Financial statements and exhibits | 0001193125-26-124393 |
| 2026-02-20 | 21:22 ET | [8-K](/filings/0001193125-26-061412.md) | 1.01 Entry into a material agreement; 1.02 Termination of a material agreement; 9.01 Financial statements and exhibits | 0001193125-26-061412 |
| 2026-02-17 | 21:30 ET | [8-K](/filings/0001193125-26-054797.md) | 3.01 Delisting notice | 0001193125-26-054797 |
| 2026-02-11 | 13:45 ET | [8-K](/filings/0001193125-26-045628.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-045628 |
| 2026-01-26 | 13:00 ET | [8-K](/filings/0001193125-26-021727.md) | 3.03 Change to security holders’ rights; 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-26-021727 |
| 2026-01-09 | 13:15 ET | [8-K](/filings/0001193125-26-008314.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-008314 |
| 2026-01-06 | 13:30 ET | [8-K](/filings/0001193125-26-003506.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-003506 |
| 2025-12-22 | 13:30 ET | [DEF 14A](/filings/0001193125-25-327630.md) | Proxy statement, period 2025-12-19 | 0001193125-25-327630 |
| 2025-12-04 | 13:15 ET | [8-K](/filings/0001193125-25-307516.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-307516 |
| 2025-11-12 | 13:45 ET | [10-Q](/filings/0001193125-25-276160.md) | Quarterly report, period 2025-09-30 | 0001193125-25-276160 |
| 2025-11-12 | 13:40 ET | [8-K](/filings/0001193125-25-276140.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-25-276140 |
| 2025-10-14 | 11:50 ET | [8-K](/filings/0001193125-25-238065.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure | 0001193125-25-238065 |
| 2025-09-26 | 21:12 ET | [8-K](/filings/0001193125-25-220788.md) | 7.01 Regulation FD disclosure | 0001193125-25-220788 |
| 2025-09-08 | 12:36 ET | [8-K](/filings/0000950170-25-113371.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000950170-25-113371 |
| 2025-08-21 | 20:05 ET | [8-K](/filings/0000950170-25-110654.md) | 3.01 Delisting notice | 0000950170-25-110654 |
| 2025-08-12 | 12:45 ET | [10-Q](/filings/0000950170-25-106947.md) | Quarterly report, period 2025-06-30 | 0000950170-25-106947 |
| 2025-08-12 | 12:40 ET | [8-K](/filings/0000950170-25-106944.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-25-106944 |
| 2025-05-13 | 12:15 ET | [10-Q](/filings/0000950170-25-069827.md) | Quarterly report, period 2025-03-31 | 0000950170-25-069827 |
| 2025-05-13 | 12:05 ET | [8-K](/filings/0000950170-25-069818.md) | 2.02 Results of operations | 0000950170-25-069818 |
| 2025-05-12 | 22:00 ET | [8-K](/filings/0000950170-25-068333.md) | 5.07 Shareholder vote results | 0000950170-25-068333 |
| 2025-04-07 | 20:05 ET | [8-K](/filings/0000950170-25-051575.md) | 8.01 Other events | 0000950170-25-051575 |
| 2025-03-26 | 20:30 ET | [DEF 14A](/filings/0000950170-25-045297.md) | Proxy statement, period 2025-03-26 | 0000950170-25-045297 |
| 2025-03-25 | 12:10 ET | [10-K](/filings/0000950170-25-044099.md) | Annual report, period 2024-12-31 | 0000950170-25-044099 |
| 2025-03-25 | 12:05 ET | [8-K](/filings/0000950170-25-044098.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-25-044098 |
| 2025-03-12 | 13:00 ET | [8-K](/filings/0000950170-25-037634.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000950170-25-037634 |
| 2025-02-24 | 21:05 ET | [8-K](/filings/0000950170-25-025596.md) | 3.01 Delisting notice | 0000950170-25-025596 |
| 2025-02-04 | 14:00 ET | [8-K](/filings/0000950170-25-012868.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000950170-25-012868 |
| 2024-12-10 | 14:05 ET | [8-K](/filings/0000950170-24-134779.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000950170-24-134779 |
| 2024-11-19 | 21:35 ET | [8-K](/filings/0000950170-24-128686.md) | 1.01 Entry into a material agreement | 0000950170-24-128686 |
| 2024-11-12 | 13:35 ET | [10-Q](/filings/0000950170-24-124668.md) | Quarterly report, period 2024-09-30 | 0000950170-24-124668 |
| 2024-11-12 | 13:30 ET | [8-K](/filings/0000950170-24-124655.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-24-124655 |
| 2024-11-04 | 11:35 ET | [8-K](/filings/0000950170-24-120268.md) | 8.01 Other events | 0000950170-24-120268 |
| 2024-08-12 | 13:05 ET | [10-Q](/filings/0000950170-24-095102.md) | Quarterly report, period 2024-06-30 | 0000950170-24-095102 |
| 2024-08-12 | 13:00 ET | [8-K](/filings/0000950170-24-095097.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-24-095097 |
| 2024-07-02 | 20:20 ET | [8-K](/filings/0000950170-24-080497.md) | 5.02 Departure or appointment of officers or directors; 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0000950170-24-080497 |
| 2024-05-23 | 13:00 ET | [DEF 14A](/filings/0000950170-24-063763.md) | Proxy statement, period 2024-05-23 | 0000950170-24-063763 |
| 2024-05-13 | 13:05 ET | [10-Q](/filings/0000950170-24-058244.md) | Quarterly report, period 2024-03-31 | 0000950170-24-058244 |
| 2024-05-13 | 13:00 ET | [8-K](/filings/0000950170-24-058242.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000950170-24-058242 |

Page 1 of 6. [Older](/companies/atos/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 15:08 ET. No prices; not investment advice.