🕵️ Cyclerion Therapeutics, Inc. ($CYCN)
SEC insider & ownership activity, last 12 months · CIK 1755237 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Peter M. Hecht | 19.4% | 13D | Jul 16, 2026 | filing ↗ | |
| FMR LLC | 15.0% | 13G | May 7, 2026 | filing ↗ | |
| Abigail P. Johnson | 15.0% | 13G | May 7, 2026 | filing ↗ | |
| J. Wood Capital Advisors LLC | 5.4% | 13G | Oct 17, 2025 | filing ↗ | |
| Jason Wood | 5.4% | 13G | Oct 17, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Apr 1, 2026 | filing ↗ |
| Change of control (5.01) | Apr 1, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 17, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 3, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 3, 2026 | filing ↗ |
| Other events (8.01) | Dec 1, 2025 | filing ↗ |
| Material agreement (1.01) | Sep 19, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 19, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 19, 2025 | filing ↗ |