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 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 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 |
| 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 |
| 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 |
| 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 | — |
| 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 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 16, 2025 | — |
| 4 | Insider transaction | May 27, 2025 | May 27, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 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 |
| 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 |
| 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 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 4 | Insider transaction | Aug 14, 2024 | Aug 13, 2024 |
| 3 | Initial insider ownership | Aug 9, 2024 | Aug 1, 2024 |
| SC 13G | Ownership over 5% (passive) | Aug 2, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Mar 22, 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 |
| 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 |
| 4 | Insider transaction | Apr 24, 2023 | Apr 21, 2023 |
| 3 | Initial insider ownership | Apr 24, 2023 | Apr 21, 2023 |
| 4 | Insider transaction | Mar 10, 2023 | Mar 10, 2023 |
| 4 | Insider transaction | Feb 27, 2023 | Feb 27, 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 |
| 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 |
| 4 | Insider transaction | Jan 24, 2023 | Jan 24, 2023 |
| 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 | — |
| 4 | Insider transaction | Sep 28, 2022 | Sep 28, 2022 |
| 4 | Insider transaction | Sep 27, 2022 | Sep 26, 2022 |
| 4 | Insider transaction | Sep 8, 2022 | Sep 7, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Sep 1, 2022 |
| 4 | Insider transaction | Aug 17, 2022 | Aug 17, 2022 |
| 4 | Insider transaction | Aug 10, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 2, 2022 | Aug 1, 2022 |
| 4 | Insider transaction | Jun 21, 2022 | Jun 21, 2022 |
| 4 | Insider transaction | Jun 17, 2022 | Jun 16, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 13, 2022 |
| 4 | Insider transaction | Jun 7, 2022 | Jun 6, 2022 |
| 4 | Insider transaction | Jun 1, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | May 26, 2022 | May 26, 2022 |
| 4 | Insider transaction | May 24, 2022 | May 23, 2022 |
| 4 | Insider transaction | May 17, 2022 | May 17, 2022 |
| 4 | Insider transaction | May 13, 2022 | May 11, 2022 |
| 4 | Insider transaction | May 13, 2022 | May 11, 2022 |
| 4 | Insider transaction | May 10, 2022 | May 6, 2022 |
| 4 | Insider transaction | May 10, 2022 | May 6, 2022 |
| 4 | Insider transaction | May 10, 2022 | May 10, 2022 |
| 4 | Insider transaction | Apr 28, 2022 | Apr 26, 2022 |
| 3 | Initial insider ownership | Apr 28, 2022 | Apr 26, 2022 |
| 4 | Insider transaction | Apr 28, 2022 | Apr 26, 2022 |
| 3 | Initial insider ownership | Apr 28, 2022 | Apr 26, 2022 |
| 4 | Insider transaction | Feb 23, 2022 | Feb 18, 2022 |
| 4 | Insider transaction | Feb 23, 2022 | Feb 18, 2022 |
| 4 | Insider transaction | Feb 23, 2022 | Feb 18, 2022 |
| 4 | Insider transaction | Feb 23, 2022 | Feb 18, 2022 |
| 4/A | Form 4/a submission | Feb 23, 2022 | Feb 18, 2022 |
| 4/A | Form 4/a submission | Feb 23, 2022 | Feb 18, 2022 |
| 4/A | Form 4/a submission | Feb 23, 2022 | Feb 18, 2022 |
| 4 | Insider transaction | Feb 18, 2022 | Feb 17, 2022 |
| 4 | Insider transaction | Feb 18, 2022 | Feb 17, 2022 |
| 4 | Insider transaction | Feb 18, 2022 | Feb 17, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 15, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Dec 30, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Dec 17, 2021 | — |
| 4 | Insider transaction | Nov 18, 2021 | Nov 16, 2021 |
| 4 | Insider transaction | Nov 18, 2021 | Nov 16, 2021 |
| SC 13G | Ownership over 5% (passive) | Nov 12, 2021 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 9, 2021 | — |
| 4 | Insider transaction | Nov 8, 2021 | Nov 4, 2021 |
| 4 | Insider transaction | Nov 8, 2021 | Nov 4, 2021 |
| SC 13D/A | Amended ownership over 5% (active) | Jul 14, 2021 | — |
| 4 | Insider transaction | Jun 29, 2021 | Jun 25, 2021 |
| 3 | Initial insider ownership | Jun 29, 2021 | Jun 25, 2021 |
| 4 | Insider transaction | May 5, 2021 | May 3, 2021 |
| 3 | Initial insider ownership | May 5, 2021 | May 3, 2021 |
| 4 | Insider transaction | Mar 1, 2021 | Feb 9, 2021 |
| 4 | Insider transaction | Mar 1, 2021 | Feb 9, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2021 | — |
| 4 | Insider transaction | Dec 23, 2020 | Dec 22, 2020 |
| 4 | Insider transaction | Sep 14, 2020 | Sep 10, 2020 |
| 3 | Initial insider ownership | Sep 14, 2020 | Sep 10, 2020 |
| 4 | Insider transaction | Aug 10, 2020 | Aug 6, 2020 |
| 4 | Insider transaction | Aug 10, 2020 | Aug 6, 2020 |
| 4 | Insider transaction | Aug 10, 2020 | Aug 6, 2020 |
| SC 13G | Ownership over 5% (passive) | Aug 10, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Jun 29, 2020 | — |
| SC 13D | Ownership over 5% (active) | Jun 29, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Jun 29, 2020 | — |
| 3 | Initial insider ownership | Jun 29, 2020 | Jun 17, 2020 |
| SC 13D | Ownership over 5% (active) | Jun 26, 2020 | — |
| SC 13D | Ownership over 5% (active) | Jun 26, 2020 | — |
| 4 | Insider transaction | Jun 23, 2020 | Jun 19, 2020 |
| 4 | Insider transaction | Jun 23, 2020 | Jun 19, 2020 |
| 4 | Insider transaction | Jun 23, 2020 | Jun 19, 2020 |
| 4 | Insider transaction | Jun 23, 2020 | Jun 19, 2020 |
| 4 | Insider transaction | Jun 23, 2020 | Jun 19, 2020 |
| 3 | Initial insider ownership | Jun 23, 2020 | Jun 17, 2020 |
| 3 | Initial insider ownership | Jun 23, 2020 | Jun 17, 2020 |
| 3 | Initial insider ownership | Jun 23, 2020 | Jun 17, 2020 |
| 3 | Initial insider ownership | Jun 23, 2020 | Jun 17, 2020 |
| 3 | Initial insider ownership | Jun 23, 2020 | Jun 17, 2020 |
| 3 | Initial insider ownership | Jun 23, 2020 | Jun 17, 2020 |
| 3 | Initial insider ownership | Jun 23, 2020 | Jun 17, 2020 |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2019 | — |
| 3 | Initial insider ownership | Jul 30, 2018 | Jul 29, 2018 |
| 3 | Initial insider ownership | Jul 30, 2018 | Jul 29, 2018 |
Showing 195 filings. 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
- 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.