{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-027814","form_type":"8-K","ticker":"AMPH","cik":"0001297184","company_name":"Amphastar Pharmaceuticals, Inc.","filed_at":"2026-03-16T23:59:59+00:00","discovered_at":"2026-05-14T18:02:34.739325+00:00","generated_at":"2026-05-15T11:26:18.856027+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Amphastar Board authorizes $50M increase to share buyback program","bullets":["Board authorized $50M increase to buyback program on March 12, 2026.","Program has indefinite duration; primary goal is offsetting dilution from equity compensation.","Purchases may be via open market, block trades, Rule 10b5-1 plans, or private transactions.","Timing and number of shares depend on price, regulatory requirements, and other conditions."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-027814","json":"https://secwatch.observer/filing/0001104659-26-027814.json","markdown":"https://secwatch.observer/filing/0001104659-26-027814.md","text":"https://secwatch.observer/filing/0001104659-26-027814.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1297184/000110465926027814/0001104659-26-027814-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1297184/000110465926027814/amph-20260312x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T11:26:18.856027+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"}