{"schema_version":"secwatch.filing_event.v1","accession":"0001315257-25-000006","form_type":"8-K","ticker":"KOP","cik":"0001315257","company_name":"Koppers Holdings Inc.","filed_at":"2025-11-05T23:59:59+00:00","discovered_at":"2026-05-14T18:02:39.068414+00:00","generated_at":"2026-05-17T00:12:31.971468+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Koppers expands board to nine, elects Laura Posadas as director","bullets":["Board increased from eight to nine directors; Laura Posadas elected effective Nov 5, 2025.","Posadas is CEO of Canlak Coatings (wood coating systems), with 20+ years specialty chemicals experience.","Board determined she is independent under NYSE rules; committees not yet assigned.","Will stand for election at 2026 annual meeting; compensation per standard non-employee director plan.","No reportable transactions or arrangements with company; no material relationships."],"urls":{"canonical":"https://secwatch.observer/filing/0001315257-25-000006","json":"https://secwatch.observer/filing/0001315257-25-000006.json","markdown":"https://secwatch.observer/filing/0001315257-25-000006.md","text":"https://secwatch.observer/filing/0001315257-25-000006.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1315257/000131525725000006/0001315257-25-000006-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1315257/000131525725000006/kop-20251105.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T00:12:31.971468+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"}