Company facts
- Headquarters
- Boston, Massachusetts
- Most recent report
- 8-K, filed Sep 22, 2026
- Incorporated
- Delaware
- Filings on record
- 359 filings
- On EDGAR
- CIK 1738021
- Fiscal year ends
- December
- Filer status
- Non-accelerated filer, Smaller reporting company
Financials 8 of 33
News 8 of 58
- 8-K Current report on a material event Sep 22, 2026
- 8-K Quarterly results Aug 6, 2026
- 8-K Current report on a material event Jul 1, 2026
- 8-K Current report on a material event Jun 23, 2026
- 8-K Shareholder vote results Jun 11, 2026
- 8-K Quarterly results May 5, 2026
- 8-K Other events Apr 27, 2026
- 8-K Quarterly results Mar 5, 2026
Prospectuses and Registrations 8 of 24
- S-8 Registration statement for an employee plan Mar 12, 2026
- S-3 Shelf registration statement Dec 30, 2025
- 424B5 Prospectus supplement for an offering Aug 13, 2025
- 424B5 Prospectus supplement for an offering Aug 12, 2025
- S-8 Registration statement for an employee plan Mar 27, 2025
- S-3 Shelf registration statement Aug 30, 2024
- 424B3 Prospectus supplement for an offering Jan 24, 2023
- S-3 Shelf registration statement Dec 2, 2022
Proxies 8 of 12
- DEFA14A Extra proxy material Apr 29, 2026
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2026
- DEFA14A Extra proxy material Apr 29, 2025
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2025
- DEFA14A Extra proxy material May 29, 2024
- DEFA14A Extra proxy material Apr 29, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2024
- DEFA14A Extra proxy material Apr 27, 2023
Ownership 8 of 195
- 4 Insider reported a trade Oct 2, 2026
- 4 Insider reported a trade Sep 25, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Aug 14, 2026
- SCHEDULE 13G Large holder reported a passive stake Aug 7, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended May 15, 2026
- 4/A Insider reported a trade, amended Apr 30, 2026
- 4/A Insider reported a trade, amended Apr 30, 2026
- 4 Insider reported a trade Apr 29, 2026
Other 8 of 37
- ARS Annual report sent to shareholders Apr 29, 2026
- EFFECT Notice that a registration became effective Jan 7, 2026
- CORRESP Reply to SEC staff Jan 5, 2026
- UPLOAD Comment letter from SEC staff Jan 2, 2026
- DEL AM Dec 31, 2025
- ARS Annual report sent to shareholders Apr 29, 2025
- EFFECT Notice that a registration became effective Sep 6, 2024
- CORRESP Reply to SEC staff Sep 4, 2024
Everything here comes from Compass Therapeutics, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.