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 |
|---|---|---|---|
| Passive ownership stake (update) | SC 13G/A | 2021-02-08 | - |
| Passive ownership stake (update) | SC 13G/A | 2021-02-05 | - |
| Major company event | 8-K | 2021-01-13 | 2021-01-13 |
| New insider ownership | 3 | 2021-01-11 | 2021-01-01 |
| New insider ownership | 3 | 2021-01-11 | 2021-01-01 |
| New insider ownership | 3 | 2020-12-30 | 2020-12-16 |
| Insider trade | 4 | 2020-12-30 | 2020-12-28 |
| Major company event | 8-K | 2020-12-21 | 2020-12-16 |
| Insider trade | 4 | 2020-11-12 | 2020-11-09 |
| Insider trade | 4 | 2020-11-10 | 2020-11-06 |
| Insider trade | 4 | 2020-11-06 | 2020-11-04 |
| Quarterly report | 10-Q | 2020-11-05 | 2020-09-30 |
| Major company event | 8-K | 2020-10-14 | 2020-10-14 |
| Major company event | 8-K | 2020-10-01 | 2020-10-01 |
| Employee stock plan | S-8 | 2020-09-22 | - |
| Passive ownership stake (update) | SC 13G/A | 2020-09-09 | - |
| Prospectus supplement | 424B5 | 2020-09-03 | - |
| Major company event | 8-K | 2020-09-03 | 2020-09-03 |
| 424B4 | - | 2020-08-17 | - |
| EFFECT | - | 2020-08-14 | - |
| Company correspondence | CORRESP | 2020-08-12 | - |
| SEC correspondence | UPLOAD | 2020-08-12 | - |
| D | - | 2020-08-11 | - |
| New insider ownership | 3 | 2020-08-10 | 2020-07-29 |
| Passive ownership stake | SC 13G | 2020-08-10 | - |
| Securities registration | S-3 | 2020-08-07 | - |
| Major company event | 8-K | 2020-08-03 | 2020-08-03 |
| Quarterly report | 10-Q | 2020-08-03 | 2020-06-30 |
| EFFECT | - | 2020-07-31 | - |
| Company correspondence | CORRESP | 2020-07-30 | - |
| S-3/A | - | 2020-07-30 | - |
| SEC correspondence | UPLOAD | 2020-07-30 | - |
| Securities registration | S-3 | 2020-07-24 | - |
| Major company event | 8-K | 2020-07-09 | 2020-07-09 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Insider trade | 4 | 2020-06-18 | 2020-06-16 |
| Major company event | 8-K | 2020-06-18 | 2020-06-16 |
| Quarterly report | 10-Q | 2020-05-04 | 2020-03-31 |
| Proxy materials | DEFA14A | 2020-04-23 | - |
| Proxy statement | DEF 14A | 2020-04-23 | 2020-06-16 |
| Major company event | 8-K | 2020-04-14 | 2020-04-10 |
| Insider trade | 4 | 2020-04-02 | 2020-03-31 |
| Annual report | 10-K | 2020-03-12 | 2019-12-31 |
| Major company event | 8-K | 2020-03-05 | 2020-02-28 |