Company facts
- Headquarters
- Watertown, Massachusetts
- Most recent report
- 8-K, filed Sep 25, 2026
- Incorporated
- Delaware
- Filings on record
- 544 filings
- On EDGAR
- CIK 1662579
- Fiscal year ends
- December
- Filer status
- Non-accelerated filer, Smaller reporting company
Financials 8 of 24
News 8 of 79
Prospectuses and Registrations 8 of 22
- S-8 Registration statement for an employee plan Feb 26, 2026
- 424B5 Prospectus supplement for an offering Dec 10, 2025
- S-3 Shelf registration statement Nov 21, 2025
- 424B5 Prospectus supplement for an offering Oct 16, 2025
- FWP Free writing prospectus Oct 16, 2025
- S-8 Registration statement for an employee plan Feb 27, 2025
- 424B3 Prospectus supplement for an offering Nov 15, 2024
- 424B5 Prospectus supplement for an offering Nov 15, 2024
Proxies 8 of 16
- 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
- PRE 14A Preliminary proxy statement Apr 16, 2025
- DEFA14A Extra proxy material Apr 29, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2024
- DEFA14A Extra proxy material Apr 28, 2023
Ownership 8 of 369
- 4 Insider reported a trade Sep 21, 2026
- 144 Notice of a proposed sale of restricted stock Aug 14, 2026
- 144 Notice of a proposed sale of restricted stock Aug 14, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Aug 14, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Aug 14, 2026
- SCHEDULE 13G/A Large holder reported a passive stake, amended Aug 14, 2026
- 144 Notice of a proposed sale of restricted stock Aug 13, 2026
- 144 Notice of a proposed sale of restricted stock Aug 12, 2026
Other 8 of 34
- ARS Annual report sent to shareholders Apr 29, 2026
- EFFECT Notice that a registration became effective Dec 10, 2025
- CORRESP Reply to SEC staff Dec 8, 2025
- ARS Annual report sent to shareholders Apr 29, 2025
- EFFECT Notice that a registration became effective Nov 13, 2024
- EFFECT Notice that a registration became effective Nov 13, 2024
- SUPPL Nov 13, 2024
- SUPPL Nov 13, 2024
Everything here comes from C4 Therapeutics, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.