Company facts
- Headquarters
- Boston, Massachusetts
- Most recent report
- 8-K, filed Sep 8, 2026
- Incorporated
- Delaware
- Filings on record
- 809 filings
- On EDGAR
- CIK 1501697
- Fiscal year ends
- December
- Filer status
- Non-accelerated filer, Smaller reporting company
Financials 8 of 35
News 8 of 145
Prospectuses and Registrations 8 of 57
- S-3 Shelf registration statement May 6, 2026
- S-8 Registration statement for an employee plan Mar 18, 2026
- 424B5 Prospectus supplement for an offering Oct 24, 2025
- 424B5 Prospectus supplement for an offering Oct 23, 2025
- 424B3 Prospectus supplement for an offering Sep 18, 2025
- S-3 Shelf registration statement Sep 10, 2025
- S-8 Registration statement for an employee plan Sep 10, 2025
- 424B5 Prospectus supplement for an offering Jun 23, 2025
Proxies 8 of 25
- DEFA14A Extra proxy material Mar 20, 2026
- DEF 14A Proxy statement for a shareholder vote Mar 20, 2026
- DEF 14A Proxy statement for a shareholder vote Apr 25, 2025
- DEFA14A Extra proxy material Apr 25, 2025
- DEF 14A Proxy statement for a shareholder vote Mar 24, 2025
- PRE 14A Preliminary proxy statement Mar 14, 2025
- DEFA14A Extra proxy material Apr 29, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2024
Ownership 8 of 470
- 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
- 4 Insider reported a trade Aug 13, 2026
- 4 Insider reported a trade Aug 13, 2026
- 144 Notice of a proposed sale of restricted stock Aug 13, 2026
- 144 Notice of a proposed sale of restricted stock Aug 13, 2026
- SCHEDULE 13G Large holder reported a passive stake Jul 30, 2026
- 4 Insider reported a trade Jul 1, 2026
Other 8 of 77
- EFFECT Notice that a registration became effective May 14, 2026
- CORRESP Reply to SEC staff May 12, 2026
- UPLOAD Comment letter from SEC staff May 11, 2026
- ARS Annual report sent to shareholders Mar 20, 2026
- EFFECT Notice that a registration became effective Sep 17, 2025
- CORRESP Reply to SEC staff Sep 15, 2025
- UPLOAD Comment letter from SEC staff Sep 15, 2025
- D Aug 25, 2025
Everything here comes from X4 Pharmaceuticals, Inc's own filings on SEC EDGAR. The filing list is rechecked every hour.