{"schema_version":"secwatch.filing_event.v1","accession":"0001297184-24-000042","form_type":"8-K","ticker":"AMPH","cik":"0001297184","company_name":"Amphastar Pharmaceuticals, Inc.","filed_at":"2024-06-04T23:59:59+00:00","discovered_at":"2026-05-14T18:03:17.758468+00:00","generated_at":"2026-06-01T06:28:13.261152+00:00","sec_items":["5.02","5.07","8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Amphastar board authorizes $50M increase to share buyback program to offset dilution","bullets":["$50M increase to buyback program authorized June 3, 2024; program continues indefinitely.","Primary goal is to offset dilution from equity compensation programs.","Purchases may be via open market, block trades, Rule 10b5-1 plans, or negotiated transactions.","Timing and number of shares repurchased depend on price, corporate and regulatory factors."],"urls":{"canonical":"https://secwatch.observer/filing/0001297184-24-000042","json":"https://secwatch.observer/filing/0001297184-24-000042.json","markdown":"https://secwatch.observer/filing/0001297184-24-000042.md","text":"https://secwatch.observer/filing/0001297184-24-000042.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1297184/000129718424000042/0001297184-24-000042-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1297184/000129718424000042/amph-20240603x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-01T06:28:13.261152+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"}