{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-24-133737","form_type":"8-K","ticker":"KOP","cik":"0001315257","company_name":"Koppers Holdings Inc.","filed_at":"2024-12-05T23:59:59+00:00","discovered_at":"2026-05-14T18:03:08.060390+00:00","generated_at":"2026-05-29T07:00:55.394222+00:00","sec_items":["2.05","9.01"],"event_type":"other_material","sentiment":"negative","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Koppers to cease phthalic anhydride production at Stickney, IL facility by mid-2025, expects $51-55M pre-tax charges","bullets":["Pre-tax charges of $51-55M through end of 2026; $28M non-cash, $23-27M cash for cleaning, demolition, severance.","Closure impacts ~25 employees; coal tar distillation operations at Stickney will continue unchanged.","Decision driven by significant near-term capital requirements and declining coal-tar feedstock availability.","Savings from closure incorporated into 2025 targets: $300M adjusted EBITDA and $65-75M capex.","Environmental benefit: annual emissions of regulated air contaminants expected to drop 50-70%."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-24-133737","json":"https://secwatch.observer/filing/0000950170-24-133737.json","markdown":"https://secwatch.observer/filing/0000950170-24-133737.md","text":"https://secwatch.observer/filing/0000950170-24-133737.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1315257/000095017024133737/0000950170-24-133737-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1315257/000095017024133737/kop-20241205.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-29T07:00:55.394222+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"}