{"schema_version":"secwatch.filing_event.v1","accession":"0001356576-24-000020","form_type":"8-K","ticker":"SUPN","cik":"0001356576","company_name":"SUPERNUS PHARMACEUTICALS, INC.","filed_at":"2024-04-24T23:59:59+00:00","discovered_at":"2026-05-14T18:03:18.072266+00:00","generated_at":"2026-06-03T09:26:06.669421+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Director John M. Siebert to retire from Supernus Board at June 2024 annual meeting","bullets":["John M. Siebert, Ph.D., will retire from the Board effective at the Annual Meeting in June 2024.","Siebert will not stand for re-election; decision not due to any disagreement with the company.","Siebert served on the Board for over a decade."],"urls":{"canonical":"https://secwatch.observer/filing/0001356576-24-000020","json":"https://secwatch.observer/filing/0001356576-24-000020.json","markdown":"https://secwatch.observer/filing/0001356576-24-000020.md","text":"https://secwatch.observer/filing/0001356576-24-000020.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1356576/000135657624000020/0001356576-24-000020-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1356576/000135657624000020/supn-20240422.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-03T09:26:06.669421+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":"24a0aadfad","claim":"John M. Siebert retired as Director at SUPERNUS PHARMACEUTICALS, INC..","evidence_excerpt":"On April 22, 2024, John M. Siebert, Ph.D. informed Supernus Pharmaceuticals, Inc. (the “Company”) that he has decided to retire from the Company's Board of Directors (the \"Board\"), effective at the Company's Annual Meeting of Stockholders in June 2024","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1356576/000135657624000020/0001356576-24-000020-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"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"}