{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-421025","form_type":"8-K","ticker":"KPTI","cik":"0001503802","company_name":"Karyopharm Therapeutics Inc.","filed_at":"2026-10-14T11:30:05+00:00","discovered_at":"2026-10-14T11:35:00.422349+00:00","generated_at":"2026-10-14T11:35:27.531158+00:00","sec_items":["8.01"],"event_type":"debt","sentiment":"negative","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"medium","headline":"Karyopharm extends indenture forbearance period to Oct 22, 2026 from Oct 15","bullets":["Company extended the end of its Forbearance Period from 11:59 p.m. ET Oct 15, 2026 to 11:59 p.m. ET Oct 22, 2026, absent earlier termination.","Extension made under Section 19 of the Forbearance Agreement and Limited Waiver to Indentures dated Sept 10, 2026, disclosed in a Sept 11, 2026 Form 8-K.","Filing does not specify note principal amounts, interest rates, or the underlying covenant defaults prompting forbearance.","Signed Oct 14, 2026 by Michael Mano, Executive Vice President, Chief Legal Officer and Secretary; KPTI trades on Nasdaq."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-421025","json":"https://secwatch.observer/filing/0001193125-26-421025.json","markdown":"https://secwatch.observer/filing/0001193125-26-421025.md","text":"https://secwatch.observer/filing/0001193125-26-421025.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1503802/000119312526421025/0001193125-26-421025-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1503802/000119312526421025/d451522d8k.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-14T11:35:27.531158+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}