Atossa Therapeutics, Inc. SEC filings ATOS
Atossa Therapeutics, Inc. has 641 filings in SEC EDGAR's recent list, going back to Mar 30, 2010. Its latest annual report, Form ARS, was filed on Mar 30, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 7, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 9, 2026 (material agreement, change to shareholder rights, other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Material agreement, Change to shareholder rights, Other events
|
Oct 9, 2026 | Oct 8, 2026 |
| 8-K |
Current report
Other events
|
Sep 29, 2026 | Sep 29, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 18, 2026 | Sep 18, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2026 | Aug 7, 2026 |
| 10-Q | Quarterly report | Aug 7, 2026 | Jun 30, 2026 |
| 424B5 | Prospectus supplement | Jun 12, 2026 | — |
| 8-K |
Current report
Material agreement
|
Jun 11, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| 8-K | Current report | May 8, 2026 | May 8, 2026 |
| 10-Q | Quarterly report | May 8, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 8, 2026 | May 7, 2026 |
| 8-K |
Current report
Other events
|
Apr 16, 2026 | Apr 13, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 26, 2026 |
| ARS | Annual report to shareholders | Mar 30, 2026 | Dec 31, 2025 |
| DEF 14A | Proxy statement | Mar 30, 2026 | Mar 30, 2026 |
| 10-K | Annual report | Mar 25, 2026 | Dec 31, 2025 |
| 8-K | Current report | Mar 25, 2026 | Mar 25, 2026 |
| PRE 14A | Preliminary proxy statement | Mar 20, 2026 | Mar 20, 2026 |
| 8-K |
Current report
Material agreement, Agreement ended
|
Feb 20, 2026 | Feb 19, 2026 |
| 424B5 | Prospectus supplement | Feb 20, 2026 | — |
| 424B3 | Prospectus | Feb 20, 2026 | — |
| 8-K |
Current report
Listing notice
|
Feb 17, 2026 | Feb 17, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 11, 2026 | Feb 11, 2026 |
| 4/A | Filing | Jan 30, 2026 | Jan 20, 2026 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Shareholder vote results
|
Jan 26, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 9, 2026 | Jan 9, 2026 |
| 8-K |
Current report
Other events
|
Jan 6, 2026 | Jan 6, 2026 |
| DEF 14A | Proxy statement | Dec 22, 2025 | Dec 19, 2025 |
| PRE 14A | Preliminary proxy statement | Dec 12, 2025 | Dec 12, 2025 |
| 8-K |
Current report
Other events
|
Dec 4, 2025 | Dec 4, 2025 |
| 10-Q | Quarterly report | Nov 12, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2025 | Nov 12, 2025 |
| 4 | Insider transaction | Oct 21, 2025 | Oct 14, 2025 |
| 3 | Initial insider ownership | Oct 21, 2025 | Oct 14, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Oct 14, 2025 | Oct 14, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 26, 2025 | Sep 26, 2025 |
| 8-K |
Current report
Other events
|
Sep 8, 2025 | Sep 8, 2025 |
| 8-K |
Current report
Listing notice
|
Aug 21, 2025 | Aug 21, 2025 |
| 10-Q | Quarterly report | Aug 12, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2025 | Aug 12, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 29, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 16, 2025 | — |
| 4 | Insider transaction | May 22, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 10-Q | Quarterly report | May 13, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 13, 2025 | May 13, 2025 |
| 8-K |
Current report
Shareholder vote results
|
May 12, 2025 | May 8, 2025 |
| 8-K |
Current report
Other events
|
Apr 7, 2025 | Apr 7, 2025 |
| 4 | Insider transaction | Mar 28, 2025 | Mar 26, 2025 |
| ARS | Annual report to shareholders | Mar 26, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Mar 26, 2025 | Mar 26, 2025 |
| S-8 | Employee stock plan registration | Mar 26, 2025 | — |
| 10-K | Annual report | Mar 25, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 25, 2025 | Mar 25, 2025 |
| 8-K |
Current report
Other events
|
Mar 12, 2025 | Mar 11, 2025 |
| 8-K |
Current report
Listing notice
|
Feb 24, 2025 | Feb 21, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 7, 2025 | — |
| 8-K |
Current report
Other events
|
Feb 4, 2025 | Jan 30, 2025 |
| 8-K |
Current report
Other events
|
Dec 10, 2024 | Dec 10, 2024 |
| 8-K |
Current report
Material agreement
|
Nov 19, 2024 | Nov 19, 2024 |
| 424B5 | Prospectus supplement | Nov 19, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| 10-Q | Quarterly report | Nov 12, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2024 | Nov 12, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 4, 2024 | — |
| 8-K |
Current report
Other events
|
Nov 4, 2024 | Nov 4, 2024 |
| SC 13G | Ownership over 5% (passive) | Oct 22, 2024 | — |
| 10-Q | Quarterly report | Aug 12, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2024 | Aug 12, 2024 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
Jul 2, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jun 27, 2024 |
| EFFECT | Filing | May 23, 2024 | — |
| DEF 14A | Proxy statement | May 23, 2024 | May 23, 2024 |
| CORRESP | Letter to the SEC | May 21, 2024 | — |
| UPLOAD | Letter from the SEC | May 21, 2024 | — |
| DEL AM | Filing | May 14, 2024 | — |
| S-3 | Shelf registration | May 13, 2024 | — |
| 10-Q | Quarterly report | May 13, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 13, 2024 | May 13, 2024 |
| ARS | Annual report to shareholders | May 10, 2024 | Dec 31, 2023 |
| PRE 14A | Preliminary proxy statement | May 10, 2024 | May 10, 2024 |
| 4 | Insider transaction | Apr 11, 2024 | Apr 10, 2024 |
| 8-K/A |
Amended current report
Results of operations
|
Apr 2, 2024 | Apr 1, 2024 |
| 10-K | Annual report | Apr 1, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Apr 1, 2024 | Apr 1, 2024 |
| 8-K |
Current report
Listing notice
|
Mar 18, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 9, 2024 |
| 3 | Initial insider ownership | Mar 14, 2024 | Mar 9, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 12, 2024 | Mar 9, 2024 |
| 4 | Insider transaction | Nov 17, 2023 | Nov 15, 2023 |
| 4/A | Form 4/a | Nov 15, 2023 | Nov 15, 2023 |
| 3 | Initial insider ownership | Nov 15, 2023 | Nov 8, 2023 |
| 4 | Insider transaction | Nov 15, 2023 | Nov 15, 2023 |
| 10-Q | Quarterly report | Nov 13, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2023 | Nov 13, 2023 |
| 8-K |
Current report
Officer or director change
|
Nov 9, 2023 | Nov 9, 2023 |
| 3 | Initial insider ownership | Oct 16, 2023 | Oct 6, 2023 |
| 8-K |
Current report
Officer or director change
|
Oct 6, 2023 | Oct 2, 2023 |
| 8-K |
Current report
Listing notice
|
Sep 28, 2023 | Sep 26, 2023 |
| 8-K |
Current report
Other events
|
Aug 31, 2023 | Aug 30, 2023 |
| 10-Q | Quarterly report | Aug 14, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 14, 2023 | Aug 14, 2023 |
| 8-K |
Current report
Listing notice
|
Jul 13, 2023 | Jul 13, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 28, 2023 | Jun 27, 2023 |
| 8-K |
Current report
Listing notice
|
Jun 23, 2023 | Jun 21, 2023 |
| 4 | Insider transaction | Jun 20, 2023 | Jun 20, 2023 |
| 4 | Insider transaction | Jun 5, 2023 | Jun 1, 2023 |
| 8-K |
Current report
Officer or director change
|
Jun 1, 2023 | May 26, 2023 |
| 8-K |
Current report
Auditor change
|
May 22, 2023 | May 17, 2023 |
| 10-Q | Quarterly report | May 15, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 15, 2023 | May 15, 2023 |
| 4 | Insider transaction | May 5, 2023 | May 4, 2023 |
| 4 | Insider transaction | May 5, 2023 | May 4, 2023 |
| 4 | Insider transaction | May 5, 2023 | May 4, 2023 |
| 4 | Insider transaction | May 5, 2023 | May 4, 2023 |
| 4 | Insider transaction | May 5, 2023 | May 4, 2023 |
| 8-K |
Current report
Shareholder vote results
|
May 4, 2023 | May 4, 2023 |
| DEFA14A | Additional proxy material | Apr 26, 2023 | — |
| 8-K |
Current report
Bylaw or fiscal year change
|
Apr 26, 2023 | Apr 26, 2023 |
| 8-K |
Current report
Listing notice
|
Apr 4, 2023 | Apr 4, 2023 |
| ARS | Annual report to shareholders | Mar 30, 2023 | Dec 31, 2022 |
| DEF 14A | Proxy statement | Mar 30, 2023 | May 4, 2023 |
| 10-K | Annual report | Mar 22, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 22, 2023 | Mar 22, 2023 |
| 8-K |
Current report
Other events
|
Mar 13, 2023 | Mar 10, 2023 |
| 4 | Insider transaction | Mar 6, 2023 | Mar 2, 2023 |
| 4 | Insider transaction | Mar 6, 2023 | Mar 2, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| 10-Q | Quarterly report | Nov 7, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2022 | Nov 7, 2022 |
| 8-K |
Current report
Listing notice
|
Oct 7, 2022 | Oct 5, 2022 |
| 10-Q | Quarterly report | Aug 8, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2022 | Aug 8, 2022 |
| SC 13G | Ownership over 5% (passive) | Jul 8, 2022 | — |
| 8-K |
Current report
Other events
|
Jul 7, 2022 | Jul 1, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 1, 2022 | Jun 28, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 6, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | May 16, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 16, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 16, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 16, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 16, 2022 | May 13, 2022 |
| 8-K |
Current report
Shareholder vote results
|
May 16, 2022 | May 13, 2022 |
| 10-Q | Quarterly report | May 9, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 9, 2022 | May 9, 2022 |
| DEF 14A | Proxy statement | Apr 11, 2022 | May 13, 2022 |
| PRE 14A | Preliminary proxy statement | Apr 1, 2022 | May 13, 2022 |
| 4 | Insider transaction | Feb 28, 2022 | Feb 24, 2022 |
| 4 | Insider transaction | Feb 28, 2022 | Feb 24, 2022 |
| 10-K | Annual report | Feb 28, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Feb 28, 2022 | Feb 24, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 4, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 13, 2022 | — |
| 10-Q | Quarterly report | Nov 15, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 15, 2021 | Nov 15, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Oct 6, 2021 | Oct 6, 2021 |
| DEFA14A | Additional proxy material | Sep 14, 2021 | — |
| 8-K |
Current report
Shareholder vote results
|
Sep 8, 2021 | Sep 7, 2021 |
| 10-Q | Quarterly report | Aug 13, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 13, 2021 | Aug 13, 2021 |
| DEF 14A | Proxy statement | Aug 9, 2021 | Sep 7, 2021 |
| PRE 14A | Preliminary proxy statement | Jul 29, 2021 | Sep 7, 2021 |
| 4 | Insider transaction | Jul 7, 2021 | Jul 2, 2021 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 4 | Insider transaction | May 18, 2021 | May 14, 2021 |
| 10-Q | Quarterly report | May 14, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 14, 2021 | May 14, 2021 |
| DEFA14A | Additional proxy material | May 11, 2021 | — |
| EFFECT | Filing | Apr 29, 2021 | — |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- ATOS (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Seattle, WA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1488039
- Former names
- ATOSSA GENETICS INC (until Nov 13, 2019)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.