{"schema_version":"secwatch.filing_event.v1","accession":"0000822818-23-000050","form_type":"8-K","ticker":"CLH","cik":"0000822818","company_name":"CLEAN HARBORS INC","filed_at":"2023-12-07T23:59:59+00:00","discovered_at":"2026-05-14T18:03:32.098409+00:00","generated_at":"2026-06-07T16:39:46.742106+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Clean Harbors expands share repurchase program by $500M","bullets":["Board authorized $500M expansion; $54M remained in existing program as of Dec 1, 2023.","Funded from available cash; company has bought back 8.5M shares at ~$64 avg under original $600M plan.","CFO states buyback is core to capital allocation, alongside acquisitions, investments, and debt reduction."],"urls":{"canonical":"https://secwatch.observer/filing/0000822818-23-000050","json":"https://secwatch.observer/filing/0000822818-23-000050.json","markdown":"https://secwatch.observer/filing/0000822818-23-000050.md","text":"https://secwatch.observer/filing/0000822818-23-000050.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/822818/000082281823000050/0000822818-23-000050-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/822818/000082281823000050/clh-20231207.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T16:39:46.742106+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"}