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Historical filings are retained here; live price history ends at delisting."}, "corporate_actions": {"status_label": "Listed", "items": [{"action": "DELISTED", "reason": null, "counterparty": null, "old_value": "KRSA", "new_value": "", "effective": "", "evidence": "KRSA no longer appears in the US listed universe", "source_url": "", "applied": 0, "detected_at": "2026-10-23T19:23:17.370158"}, {"action": "TICKER_CHANGE", "reason": null, "counterparty": null, "old_value": "CYCN", "new_value": "KRSA", "effective": "", "evidence": "EDGAR now lists CIK 0001755237 under KRSA (was CYCN)", "source_url": "https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001755237", "applied": 1, "detected_at": "2026-10-23T19:22:49.822722"}, {"action": "NAME_MISMATCH", "reason": null, "counterparty": null, "old_value": "CYCN (Korsana Biosciences, Inc.)", "new_value": "Cyclerion Therapeutics, Inc. - Common Stock", "effective": "", "evidence": "we hold CYCN as Korsana Biosciences, Inc.; the NASDAQ universe lists that code as Cyclerion Therapeutics, Inc. - Common Stock. Unconfirmed \u2014 needs EDGAR confirmation before any alias is closed.", "source_url": "", "applied": 0, "detected_at": "2026-09-11T07:47:33.350068"}, {"action": "RENAME", "reason": null, "counterparty": null, "old_value": "Cyclerion Therapeutics, Inc. - Common Stock", "new_value": "Korsana Biosciences, Inc.", "effective": "", "evidence": "EDGAR reports a different company name for CIK 0001755237", "source_url": "https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001755237", "applied": 1, "detected_at": "2026-09-11T07:47:01.868528"}, {"action": "CONSOLIDATION", "reason": null, "counterparty": null, "old_value": "1.6100", "new_value": "6.3500", "effective": "2024-12-04", "evidence": "CYCN moved 1:4 in one session on 2024-12-04 \u2014 a clean 1:4 ratio. Volume does NOT match a share-count change, so this may be a genuine price move \u2014 flagged for review, price history left untouched.", "source_url": "", "applied": 0, "detected_at": "2026-09-10T03:15:25.267247"}]}, "key_people": [], "activity": [], "announcements": [{"form": "144", "date": "2026-10-22", "title": "Notice of proposed sale", "accession": "0001950047-26-010364", "price_sensitive": false}, {"form": "SCHEDULE 13G/A", "date": "2026-10-15", "title": "Form SCHEDULE 13G/A", "accession": "0001493152-26-047257", "price_sensitive": false}, {"form": "DEF 14A", "date": "2026-10-15", "title": "Proxy statement", "accession": "0001193125-26-422893", "price_sensitive": false}, {"form": "SCHEDULE 13G/A", "date": "2026-10-07", "title": "Form SCHEDULE 13G/A", "accession": "0000315066-26-002345", "price_sensitive": false}, {"form": "PRE 14A", "date": "2026-10-05", "title": "Form PRE 14A", "accession": "0001193125-26-414133", "price_sensitive": false}, {"form": "144", "date": "2026-09-23", "title": "Notice of proposed sale", "accession": "0001950047-26-009776", "price_sensitive": false}, {"form": "144", "date": "2026-09-22", "title": "Notice of proposed sale", "accession": "0001950047-26-009757", "price_sensitive": false}, {"form": "SCHEDULE 13G", "date": "2026-09-18", "title": "Form SCHEDULE 13G", "accession": "0000950142-26-002568", "price_sensitive": false}, {"form": "144", "date": "2026-09-18", "title": "Notice of proposed sale", "accession": "0001950047-26-009679", "price_sensitive": false}, {"form": "SCHEDULE 13G", "date": "2026-09-16", "title": "Form SCHEDULE 13G", "accession": "0001903360-26-000015", "price_sensitive": false}, {"form": "SCHEDULE 13D", "date": "2026-09-15", "title": "Form SCHEDULE 13D", "accession": "0001738048-26-000069", "price_sensitive": false}, {"form": "SCHEDULE 13D", "date": "2026-09-11", "title": "Form SCHEDULE 13D", "accession": "0001193125-26-389417", "price_sensitive": false}, {"form": "8-K", "date": "2026-09-11", "title": "Material event", "accession": "0001193125-26-389318", "price_sensitive": true}, {"form": "4", "date": "2026-09-10", "title": "Insider transaction", "accession": "0001193125-26-388146", "price_sensitive": false}, {"form": "4", "date": "2026-09-10", "title": "Insider transaction", "accession": "0001193125-26-388144", "price_sensitive": false}, {"form": "4", "date": "2026-09-10", "title": "Insider transaction", "accession": "0001193125-26-388142", "price_sensitive": false}, {"form": "4", "date": "2026-09-10", "title": "Insider transaction", "accession": "0001193125-26-388136", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388127", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388126", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388123", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388120", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388115", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388112", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388110", "price_sensitive": false}, {"form": "3", "date": "2026-09-10", "title": "Initial insider holdings", "accession": "0001193125-26-388094", "price_sensitive": false}], "performance": {"ticker": "KRSA", "has_prices": false, "summary": null, "buys": []}, "price_series": [], "refreshing": true}