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 |
|---|---|---|---|
| Major company event | 8-K | 2021-10-28 | 2021-10-27 |
| Major company event | 8-K | 2021-09-30 | 2021-09-30 |
| SEC correspondence | UPLOAD | 2021-09-07 | - |
| Quarterly report (amended) | 10-Q/A | 2021-08-27 | 2021-06-30 |
| Quarterly report (amended) | 10-Q/A | 2021-08-27 | 2021-03-31 |
| Annual report (amended) | 10-K/A | 2021-08-27 | 2020-12-31 |
| Company correspondence | CORRESP | 2021-08-27 | - |
| SEC correspondence | UPLOAD | 2021-08-24 | - |
| Major company event | 8-K | 2021-08-19 | 2021-08-18 |
| Employee stock plan | S-8 | 2021-07-30 | - |
| Quarterly report | 10-Q | 2021-07-29 | 2021-06-30 |
| Major company event | 8-K | 2021-07-29 | 2021-07-29 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Insider trade | 4 | 2021-06-28 | 2021-06-24 |
| Major company event | 8-K | 2021-06-25 | 2021-06-24 |
| 424B4 | - | 2021-06-24 | - |
| EFFECT | - | 2021-06-23 | - |
| S-3/A | - | 2021-06-23 | - |
| Company correspondence | CORRESP | 2021-06-21 | - |
| SEC correspondence | UPLOAD | 2021-06-21 | - |
| D | - | 2021-06-17 | - |
| Securities registration | S-3 | 2021-06-16 | - |
| Insider trade | 4 | 2021-06-07 | 2021-06-03 |
| Activist ownership stake (update) | SC 13D/A | 2021-06-07 | - |
| Insider trade | 4 | 2021-06-07 | 2021-06-03 |
| Insider trade | 4 | 2021-06-07 | 2021-06-03 |
| Major company event | 8-K | 2021-06-04 | 2021-06-03 |
| New insider ownership | 3 | 2021-05-19 | 2021-04-21 |
| Activist ownership stake | SC 13D | 2021-05-14 | - |
| Insider trade | 4 | 2021-05-10 | 2021-05-06 |
| Insider trade | 4 | 2021-05-06 | 2021-05-04 |
| Major company event | 8-K | 2021-05-04 | 2021-04-30 |
| Quarterly report | 10-Q | 2021-04-30 | 2021-03-31 |
| Proxy materials | DEFA14A | 2021-04-28 | - |
| Proxy statement | DEF 14A | 2021-04-28 | 2021-06-24 |
| Major company event | 8-K | 2021-04-27 | 2021-04-27 |
| Major company event | 8-K | 2021-04-26 | 2021-04-21 |
| Major company event (amended) | 8-K/A | 2021-03-19 | 2021-03-18 |
| Major company event | 8-K | 2021-03-18 | 2021-03-18 |
| Insider trade | 4 | 2021-03-01 | 2021-02-25 |
| Insider trade | 4 | 2021-03-01 | 2021-02-25 |
| Annual report | 10-K | 2021-02-25 | 2020-12-31 |
| Passive ownership stake (update) | SC 13G/A | 2021-02-16 | - |
| Passive ownership stake | SC 13G | 2021-02-12 | - |