Compass Therapeutics, Inc. SEC filings CMPX
Compass Therapeutics, Inc. has 359 filings in SEC EDGAR's recent list, going back to May 30, 2018. Its latest annual report, Form ARS, was filed on Apr 29, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 22, 2026 (regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Oct 2, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Sep 25, 2026 | Sep 24, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 22, 2026 | Sep 22, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2026 | Aug 6, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 1, 2026 | Jul 1, 2026 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jun 23, 2026 | Jun 22, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 11, 2026 | Jun 10, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 10-Q | Quarterly report | May 5, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 5, 2026 | May 5, 2026 |
| 4/A | Filing | Apr 30, 2026 | Apr 29, 2026 |
| 4/A | Filing | Apr 30, 2026 | Apr 29, 2026 |
| 4 | Insider transaction | Apr 29, 2026 | Apr 29, 2026 |
| 4 | Insider transaction | Apr 29, 2026 | Apr 29, 2026 |
| ARS | Annual report to shareholders | Apr 29, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 29, 2026 | — |
| DEF 14A | Proxy statement | Apr 29, 2026 | Jun 10, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Apr 27, 2026 | Apr 27, 2026 |
| S-8 | Employee stock plan registration | Mar 12, 2026 | — |
| 10-K | Annual report | Mar 5, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 5, 2026 | Mar 5, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 13, 2026 | — |
| 4 | Insider transaction | Feb 10, 2026 | Feb 8, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 21, 2026 | — |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| EFFECT | Filing | Jan 7, 2026 | — |
| 8-K |
Current report
Results of operations, Other events
|
Jan 6, 2026 | Jan 6, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 3 | Initial insider ownership | Jan 5, 2026 | Jan 2, 2026 |
| 3 | Initial insider ownership | Jan 5, 2026 | Jan 2, 2026 |
| CORRESP | Letter to the SEC | Jan 5, 2026 | — |
| UPLOAD | Letter from the SEC | Jan 2, 2026 | — |
| DEL AM | Filing | Dec 31, 2025 | — |
| S-3 | Shelf registration | Dec 30, 2025 | — |
| 4 | Insider transaction | Nov 18, 2025 | Nov 16, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 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 29, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 21, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Aug 18, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Aug 15, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 13, 2025 | — |
| 8-K |
Current report
Material agreement, Other events
|
Aug 13, 2025 | Aug 12, 2025 |
| 424B5 | Prospectus supplement | Aug 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 12, 2025 | — |
| 424B5 | Prospectus supplement | Aug 12, 2025 | — |
| 10-Q | Quarterly report | Aug 11, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 11, 2025 | Aug 11, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 16, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 12, 2025 | Jun 11, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 27, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 8, 2025 | May 8, 2025 |
| DEFA14A | Additional proxy material | Apr 29, 2025 | — |
| ARS | Annual report to shareholders | Apr 29, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Apr 29, 2025 | Jun 11, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 9, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 9, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Apr 11, 2025 | — |
| 144 | Notice of proposed sale | Apr 9, 2025 | — |
| 144 | Notice of proposed sale | Apr 9, 2025 | — |
| 4 | Insider transaction | Apr 8, 2025 | Apr 7, 2025 |
| 4 | Insider transaction | Apr 8, 2025 | Apr 7, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Apr 1, 2025 | Apr 1, 2025 |
| S-8 | Employee stock plan registration | Mar 27, 2025 | — |
| 10-K | Annual report | Feb 27, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 27, 2025 | Feb 27, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 14, 2025 | — |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| 4 | Insider transaction | Feb 13, 2025 | Feb 11, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| 4 | Insider transaction | Feb 11, 2025 | Feb 8, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 4, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 16, 2025 | — |
| 4 | Insider transaction | Jan 13, 2025 | Jan 9, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 8, 2025 | Jan 8, 2025 |
| 4 | Insider transaction | Dec 10, 2024 | Dec 9, 2024 |
| 3 | Initial insider ownership | Dec 10, 2024 | Dec 9, 2024 |
| 3 | Initial insider ownership | Dec 10, 2024 | Dec 9, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 10, 2024 | Dec 9, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 10-Q | Quarterly report | Nov 12, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2024 | Nov 12, 2024 |
| EFFECT | Filing | Sep 6, 2024 | — |
| CORRESP | Letter to the SEC | Sep 4, 2024 | — |
| UPLOAD | Letter from the SEC | Sep 3, 2024 | — |
| S-3 | Shelf registration | Aug 30, 2024 | — |
| 4 | Insider transaction | Aug 14, 2024 | Aug 13, 2024 |
| 10-Q | Quarterly report | Aug 12, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2024 | Aug 12, 2024 |
| 3 | Initial insider ownership | Aug 9, 2024 | Aug 1, 2024 |
| SC 13G | Ownership over 5% (passive) | Aug 2, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 17, 2024 | Jun 13, 2024 |
| DEFA14A | Additional proxy material | May 29, 2024 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
May 28, 2024 | May 28, 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 | Apr 29, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 29, 2024 | — |
| DEF 14A | Proxy statement | Apr 29, 2024 | Jun 13, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 25, 2024 | Apr 25, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 22, 2024 | — |
| 10-K | Annual report | Mar 21, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 21, 2024 | Mar 21, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Feb 14, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 14, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 14, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 14, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 14, 2024 | Feb 9, 2024 |
| 4 | Insider transaction | Feb 9, 2024 | Feb 8, 2024 |
| 4 | Insider transaction | Feb 9, 2024 | Feb 8, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 1, 2024 | — |
| 4 | Insider transaction | Jan 10, 2024 | Jan 9, 2024 |
| 4 | Insider transaction | Jan 10, 2024 | Jan 9, 2024 |
| 8-K |
Current report
Officer or director change, Other events
|
Jan 9, 2024 | Jan 8, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 5, 2024 | Jan 5, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 27, 2023 | — |
| 4 | Insider transaction | Nov 21, 2023 | Nov 17, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 17, 2023 |
| 10-Q | Quarterly report | Nov 9, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2023 | Nov 9, 2023 |
| 10-Q | Quarterly report | Aug 3, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2023 | Aug 3, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jun 15, 2023 | Jun 15, 2023 |
| 10-Q | Quarterly report | May 4, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 4, 2023 | May 4, 2023 |
| ARS | Annual report to shareholders | Apr 27, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Apr 27, 2023 | — |
| DEF 14A | Proxy statement | Apr 27, 2023 | Jun 15, 2023 |
| 4 | Insider transaction | Apr 24, 2023 | Apr 21, 2023 |
| 3 | Initial insider ownership | Apr 24, 2023 | Apr 21, 2023 |
| 8-K |
Current report
Officer or director change
|
Apr 24, 2023 | Apr 21, 2023 |
| 10-K | Annual report | Mar 15, 2023 | Dec 31, 2022 |
| 4 | Insider transaction | Mar 10, 2023 | Mar 10, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 10, 2023 | Mar 10, 2023 |
| 4 | Insider transaction | Feb 27, 2023 | Feb 27, 2023 |
| 8-K |
Current report
Officer or director change
|
Feb 24, 2023 | Feb 20, 2023 |
| 4 | Insider transaction | Feb 15, 2023 | Feb 15, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2023 | — |
| 4 | Insider transaction | Feb 10, 2023 | Feb 8, 2023 |
| 3 | Initial insider ownership | Feb 10, 2023 | Feb 8, 2023 |
| 8-K |
Current report
Officer or director change
|
Feb 10, 2023 | Feb 8, 2023 |
| 4 | Insider transaction | Feb 9, 2023 | Feb 8, 2023 |
| 4 | Insider transaction | Feb 9, 2023 | Feb 8, 2023 |
| 4 | Insider transaction | Feb 9, 2023 | Feb 8, 2023 |
| 4 | Insider transaction | Feb 9, 2023 | Feb 8, 2023 |
| 4 | Insider transaction | Feb 9, 2023 | Feb 8, 2023 |
| 4 | Insider transaction | Feb 9, 2023 | Feb 8, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| 4 | Insider transaction | Jan 31, 2023 | Jan 31, 2023 |
| 424B3 | Prospectus | Jan 24, 2023 | — |
| 4 | Insider transaction | Jan 24, 2023 | Jan 24, 2023 |
| EFFECT | Filing | Jan 20, 2023 | — |
| 8-K |
Current report
Other events
|
Jan 19, 2023 | Jan 19, 2023 |
| CORRESP | Letter to the SEC | Jan 19, 2023 | — |
| CORRESP | Letter to the SEC | Jan 17, 2023 | — |
| CORRESP | Letter to the SEC | Jan 13, 2023 | — |
| UPLOAD | Letter from the SEC | Dec 7, 2022 | — |
| S-3 | Shelf registration | Dec 2, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Nov 29, 2022 | Nov 29, 2022 |
| 4 | Insider transaction | Nov 25, 2022 | Nov 22, 2022 |
| 4 | Insider transaction | Nov 22, 2022 | Nov 18, 2022 |
| SC 13D | Ownership over 5% (active) | Nov 14, 2022 | — |
| 3 | Initial insider ownership | Nov 10, 2022 | Nov 4, 2022 |
| 4 | Insider transaction | Nov 10, 2022 | Nov 8, 2022 |
| 4 | Insider transaction | Nov 10, 2022 | Nov 8, 2022 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 10, 2022 | — |
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Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- CMPX (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Boston, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1738021
- Former names
- Olivia Ventures, Inc. (until Jun 8, 2020)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.