CYCN - CIK 0001755237
Cyclerion Therapeutics, Inc. has filed 344 documents with the SEC between 2018 and 2026. The most frequent type is insider trade (88 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Proxy materials | DEFA14A | 2024-04-29 | - |
| Proxy statement | DEF 14A | 2024-04-29 | 2024-06-14 |
| Major company event | 8-K | 2024-04-18 | 2024-04-18 |
| New insider ownership | 3 | 2024-03-11 | 2024-03-04 |
| Annual report | 10-K | 2024-03-05 | 2023-12-31 |
| Passive ownership stake (update) | SC 13G/A | 2024-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2024-02-09 | - |
| Passive ownership stake (update) | SC 13G/A | 2024-02-09 | - |
| Insider trade | 4 | 2024-01-26 | 2024-01-01 |
| Insider trade | 4 | 2024-01-26 | 2024-01-01 |
| Passive ownership stake (update) | SC 13G/A | 2024-01-22 | - |
| SEC correspondence | UPLOAD | 2023-12-28 | - |
| Company correspondence | CORRESP | 2023-12-12 | - |
| New insider ownership | 3 | 2023-12-11 | 2023-11-30 |
| New insider ownership | 3 | 2023-12-07 | 2023-11-30 |
| 3/A | - | 2023-12-07 | 2023-12-01 |
| Activist ownership stake (update) | SC 13D/A | 2023-12-05 | - |
| Major company event | 8-K | 2023-12-04 | 2023-12-01 |
| New insider ownership | 3 | 2023-12-04 | 2023-12-01 |
| Insider trade | 4 | 2023-12-04 | 2023-11-30 |
| Insider trade | 4 | 2023-12-04 | 2023-11-30 |
| Insider trade | 4 | 2023-12-04 | 2023-11-30 |
| Insider trade | 4 | 2023-12-04 | 2023-11-30 |
| Major company event | 8-K | 2023-12-01 | 2023-11-30 |
| SEC correspondence | UPLOAD | 2023-11-28 | - |
| Major company event | 8-K | 2023-11-24 | 2023-11-19 |
| Quarterly report | 10-Q | 2023-11-13 | 2023-09-30 |
| Major company event | 8-K | 2023-10-23 | 2023-10-17 |
| Passive ownership stake | SC 13G | 2023-09-05 | - |
| Insider trade | 4 | 2023-08-11 | 2023-08-09 |
| Employee stock plan | S-8 | 2023-07-31 | - |
| Quarterly report | 10-Q | 2023-07-28 | 2023-06-30 |
| Major company event | 8-K | 2023-07-19 | 2023-07-19 |
| Major company event | 8-K | 2023-07-12 | 2023-07-12 |
| Major company event | 8-K | 2023-06-27 | 2023-06-27 |
| DEFM14A | - | 2023-06-20 | - |
| PREM14A | - | 2023-06-09 | 2023-06-09 |
| Major company event | 8-K | 2023-06-01 | 2023-06-01 |
| D | - | 2023-05-25 | - |
| Major company event | 8-K | 2023-05-25 | 2023-05-19 |
| Activist ownership stake (update) | SC 13D/A | 2023-05-23 | - |
| Insider trade | 4 | 2023-05-22 | 2023-05-19 |
| Major company event | 8-K | 2023-05-15 | 2023-05-15 |
| Proxy materials | DEFA14A | 2023-05-12 | - |
| Major company event | 8-K | 2023-05-12 | 2023-05-11 |
| Activist ownership stake (update) | SC 13D/A | 2023-05-12 | - |
| Quarterly report | 10-Q | 2023-05-12 | 2023-03-31 |
| Proxy materials | DEFA14A | 2023-04-03 | - |
| Proxy statement | DEF 14A | 2023-04-03 | 2023-05-15 |
| Activist ownership stake (update) | SC 13D/A | 2023-04-03 | - |