{"schema_version":"secwatch.filing_event.v1","accession":"0001297184-21-000057","form_type":"8-K","ticker":"AMPH","cik":"0001297184","company_name":"Amphastar Pharmaceuticals, Inc.","filed_at":"2021-08-23T23:59:59+00:00","discovered_at":"2026-05-14T18:04:17.544827+00:00","generated_at":"2026-06-29T08:21:05.890718+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Amphastar director David Maris resigns effective immediately; no disagreement with company","bullets":["David Maris resigned from the Board on August 19, 2021, effective immediately.","Resignation is not the result of any disagreement with company operations, policies, or practices.","Company expressed appreciation for Maris's service and contributions."],"urls":{"canonical":"https://secwatch.observer/filing/0001297184-21-000057","json":"https://secwatch.observer/filing/0001297184-21-000057.json","markdown":"https://secwatch.observer/filing/0001297184-21-000057.md","text":"https://secwatch.observer/filing/0001297184-21-000057.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1297184/000129718421000057/0001297184-21-000057-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1297184/000129718421000057/amph-20210819x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T08:21:05.890718+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":[{"claim_id":"5cded27956","claim":"David Maris resigned as Director at Amphastar Pharmaceuticals, Inc..","evidence_excerpt":"On August 19, 2021, David Maris tendered his resignation to the Board of Directors (the “ Board ”) of Amphastar Pharmaceuticals, Inc. (the “ Company ”) effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1297184/000129718421000057/0001297184-21-000057-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}