{"schema_version":"secwatch.filing_event.v1","accession":"0001822479-25-000003","form_type":"8-K","ticker":"SHC","cik":"0001822479","company_name":"Sotera Health Co","filed_at":"2025-01-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:05.080440+00:00","generated_at":"2026-05-28T11:20:31.046432+00:00","sec_items":["8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Sotera Health appoints Vincent K. Petrella as Lead Independent Director effective Jan 2, 2025","bullets":["Vincent K. Petrella, an independent director since 2020, appointed Lead Independent Director on January 2, 2025.","Petrella previously chaired the Audit Committee; will serve as liaison between Board, management, and shareholders.","CEO Michael B. Petras Jr. cited Petrella's experience and engagement as valuable to the Board.","Petrella expressed enthusiasm for the expanded role and commitment to driving shareholder value."],"urls":{"canonical":"https://secwatch.observer/filing/0001822479-25-000003","json":"https://secwatch.observer/filing/0001822479-25-000003.json","markdown":"https://secwatch.observer/filing/0001822479-25-000003.md","text":"https://secwatch.observer/filing/0001822479-25-000003.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1822479/000182247925000003/0001822479-25-000003-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1822479/000182247925000003/shc-20250102.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-28T11:20:31.046432+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"}