Keros Therapeutics, Inc. SEC filings KROS
Keros Therapeutics, Inc. has 536 filings in SEC EDGAR's recent list, going back to Apr 29, 2016. Its latest annual report, Form ARS, was filed on Apr 22, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Regulation FD disclosure
|
Nov 5, 2026 | Nov 5, 2026 |
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2026 | Nov 5, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 27, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 29, 2026 | Sep 29, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 28, 2026 | Sep 28, 2026 |
| EFFECT | Filing | Sep 16, 2026 | — |
| DEL AM | Filing | Sep 11, 2026 | — |
| S-3 | Shelf registration | Sep 10, 2026 | — |
| 8-K |
Current report
Other events
|
Sep 8, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 19, 2026 | Aug 17, 2026 |
| 144 | Notice of proposed sale | Aug 18, 2026 | — |
| 3 | Initial insider ownership | Aug 13, 2026 | Aug 4, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 3, 2026 | Aug 3, 2026 |
| 10-Q | Quarterly report | Aug 3, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2026 | Aug 3, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 30, 2026 | Jul 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 29, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Jul 22, 2026 | Jul 17, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 17, 2026 | — |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 3 | Initial insider ownership | Jul 6, 2026 | Jul 1, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 25, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 11, 2026 |
| 144 | Notice of proposed sale | Jun 11, 2026 | — |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 3, 2026 |
| 144 | Notice of proposed sale | Jun 4, 2026 | — |
| 144 | Notice of proposed sale | Jun 4, 2026 | — |
| 144 | Notice of proposed sale | Jun 4, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 3, 2026 | Jun 3, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 1, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 15, 2026 | — |
| 10-Q | Quarterly report | May 14, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 14, 2026 | May 14, 2026 |
| ARS | Annual report to shareholders | Apr 22, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 22, 2026 | — |
| DEF 14A | Proxy statement | Apr 22, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 7, 2026 | — |
| 4 | Insider transaction | Apr 6, 2026 | Apr 2, 2026 |
| 144 | Notice of proposed sale | Mar 31, 2026 | — |
| 4/A | Filing | Mar 27, 2026 | Feb 24, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 3 | Initial insider ownership | Mar 11, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 9, 2026 |
| 8-K |
Current report
Other events
|
Mar 9, 2026 | Mar 9, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 4, 2026 | Mar 4, 2026 |
| S-8 | Employee stock plan registration | Mar 4, 2026 | — |
| 10-K | Annual report | Mar 4, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 4, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Jan 5, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 26, 2026 | Feb 20, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 18, 2026 | Feb 18, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 9, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Dec 18, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Nov 21, 2025 |
| SC TO-I/A | Filing | Nov 20, 2025 | — |
| SC TO-I/A | Filing | Nov 19, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 18, 2025 | — |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 27, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 22, 2025 | — |
| SC TO-I | Filing | Oct 20, 2025 | — |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Oct 16, 2025 | — |
| 4 | Insider transaction | Oct 15, 2025 | Oct 15, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Oct 15, 2025 | — |
| SC TO-C | Filing | Oct 15, 2025 | — |
| 8-K |
Current report
Material agreement, Results of operations, Officer or director change, Regulation FD disclosure, Other events
|
Oct 15, 2025 | Oct 15, 2025 |
| 144 | Notice of proposed sale | Sep 12, 2025 | — |
| 8-K |
Current report
Other events
|
Sep 8, 2025 | Sep 8, 2025 |
| 4 | Insider transaction | Sep 5, 2025 | Sep 3, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 28, 2025 | Aug 28, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Aug 21, 2025 | — |
| 8-K |
Current report
Other events
|
Aug 20, 2025 | Aug 20, 2025 |
| 3 | Initial insider ownership | Aug 15, 2025 | Aug 6, 2025 |
| 3 | Initial insider ownership | Aug 15, 2025 | Aug 6, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure, Other events
|
Aug 6, 2025 | Aug 6, 2025 |
| 10-Q | Quarterly report | Aug 6, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2025 | Aug 6, 2025 |
| 8-K |
Current report
Other events
|
Jul 17, 2025 | Jul 17, 2025 |
| 8-K |
Current report
Officer or director change
|
Jul 15, 2025 | Jul 9, 2025 |
| 4 | Insider transaction | Jun 24, 2025 | Jun 20, 2025 |
| 4 | Insider transaction | Jun 12, 2025 | May 16, 2025 |
| 4/A | Filing | Jun 11, 2025 | Jun 4, 2025 |
| 4/A | Filing | Jun 11, 2025 | Jun 4, 2025 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Jun 9, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 6, 2025 | Jun 6, 2025 |
| 8-K |
Current report
Exit or restructuring costs, Other events
|
May 29, 2025 | May 28, 2025 |
| DEFA14A | Additional proxy material | May 27, 2025 | — |
| DEFA14A | Additional proxy material | May 19, 2025 | — |
| DEFA14A | Additional proxy material | May 19, 2025 | — |
| DEFA14A | Additional proxy material | May 19, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 14, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | May 12, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 12, 2025 | May 12, 2025 |
| DEFA14A | Additional proxy material | May 9, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | May 8, 2025 | — |
| 10-Q | Quarterly report | May 6, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 6, 2025 | May 6, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 5, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 2, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Apr 28, 2025 | — |
| ARS | Annual report to shareholders | Apr 23, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 23, 2025 | — |
| DEF 14A | Proxy statement | Apr 23, 2025 | Jun 4, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Apr 18, 2025 | — |
| 8-K |
Current report
Material agreement
|
Apr 18, 2025 | Apr 17, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 9, 2025 |
| 3 | Initial insider ownership | Apr 11, 2025 | Apr 8, 2025 |
| SCHEDULE 13D | Ownership over 5% (active) | Apr 11, 2025 | — |
| 8-A12B | Filing | Apr 10, 2025 | — |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Bylaw or fiscal year change, Other events
|
Apr 10, 2025 | Apr 9, 2025 |
| 4 | Insider transaction | Apr 7, 2025 | Apr 4, 2025 |
| 8-K |
Current report
Other events
|
Mar 31, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Mar 6, 2025 | Mar 5, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 28, 2025 | Feb 28, 2025 |
| S-8 | Employee stock plan registration | Feb 26, 2025 | — |
| 10-K | Annual report | Feb 26, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2025 | Feb 26, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 18, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 7, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 30, 2025 | Jan 30, 2025 |
| 4/A | Filing | Jan 24, 2025 | Jan 4, 2024 |
| 8-K |
Current report
Other events
|
Jan 21, 2025 | Jan 16, 2025 |
| 8-K |
Current report
Other events
|
Jan 15, 2025 | Jan 15, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 10, 2025 | Jan 10, 2025 |
| 8-K |
Current report
Other events
|
Dec 12, 2024 | Dec 12, 2024 |
| 8-K |
Current report
Other events
|
Dec 10, 2024 | Dec 9, 2024 |
| 8-K |
Current report
Material agreement, Other events
|
Dec 3, 2024 | Dec 3, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 26, 2024 | Nov 26, 2024 |
| 4 | Insider transaction | Nov 12, 2024 | Nov 8, 2024 |
| 3 | Initial insider ownership | Nov 8, 2024 | Nov 1, 2024 |
| 10-Q | Quarterly report | Nov 6, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2024 | Nov 6, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 6, 2024 | Nov 6, 2024 |
| 8-K |
Current report
Officer or director change, Other events
|
Oct 16, 2024 | Oct 15, 2024 |
| 8-K |
Current report
Other events
|
Sep 30, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Other events
|
Sep 3, 2024 | Sep 3, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 28, 2024 | Aug 28, 2024 |
| 4 | Insider transaction | Aug 15, 2024 | Aug 13, 2024 |
| 4 | Insider transaction | Aug 15, 2024 | Aug 13, 2024 |
| 144 | Notice of proposed sale | Aug 13, 2024 | — |
| 144 | Notice of proposed sale | Aug 13, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 7, 2024 | Aug 7, 2024 |
| 10-Q | Quarterly report | Aug 7, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2024 | Aug 7, 2024 |
| 8-K |
Current report
Other events
|
Jun 17, 2024 | Jun 17, 2024 |
| 424B5 | Prospectus supplement | Jun 17, 2024 | — |
| 8-K |
Current report
Officer or director change, Other events
|
Jun 17, 2024 | Jun 14, 2024 |
| 8-K |
Current report
Other events
|
Jun 17, 2024 | Jun 17, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 3, 2024 |
| 3 | Initial insider ownership | Jun 5, 2024 | Jun 1, 2024 |
| 8-K |
Current report
Other events
|
Jun 4, 2024 | Jun 4, 2024 |
| 4 | Insider transaction | Jun 3, 2024 | May 30, 2024 |
| 4 | Insider transaction | Jun 3, 2024 | May 30, 2024 |
| 4 | Insider transaction | Jun 3, 2024 | May 30, 2024 |
| 4 | Insider transaction | Jun 3, 2024 | May 30, 2024 |
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- KROS (Nasdaq)
- Fiscal year ends
- December 31
- Headquarters
- Lexington, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1664710
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.