{"schema_version":"secwatch.filing_event.v1","accession":"0000822818-24-000037","form_type":"8-K","ticker":"CLH","cik":"0000822818","company_name":"CLEAN HARBORS INC","filed_at":"2024-09-03T23:59:59+00:00","discovered_at":"2026-05-14T18:03:15.981415+00:00","generated_at":"2026-05-31T06:43:14.997531+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Clean Harbors elects co-CEOs Battles and Gerstenberg to Board, expands to 13 members","bullets":["Board expanded from 11 to 13 directors effective August 29, 2024.","Co-CEOs Michael Battles and Eric Gerstenberg elected as Class III directors.","Battles served as CFO since 2016; Gerstenberg as COO since 2015 before co-CEO roles.","Neither will receive additional compensation for board service; no related party transactions.","Terms expire at 2025 annual meeting; no committee appointments."],"urls":{"canonical":"https://secwatch.observer/filing/0000822818-24-000037","json":"https://secwatch.observer/filing/0000822818-24-000037.json","markdown":"https://secwatch.observer/filing/0000822818-24-000037.md","text":"https://secwatch.observer/filing/0000822818-24-000037.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/0000822818-24-000037-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/clh-20240829.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T06:43:14.997531+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":"b33b7a18a4","claim":"Michael Battles was elected as Director at CLEAN HARBORS INC.","evidence_excerpt":"On September 3, 2024, Clean Harbors, Inc. (the “Company”) announced the expansion of the Company’s Board of Directors (the \"Board\") from eleven to thirteen members and the election of Co-Chief Executive Officers Michael Battles and Eric Gerstenberg to the Board, all effective immediately following the Company's board meeting on August 29, 2024.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/0000822818-24-000037-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"ff84e60d18","claim":"Eric Gerstenberg was elected as Director at CLEAN HARBORS INC.","evidence_excerpt":"On September 3, 2024, Clean Harbors, Inc. (the “Company”) announced the expansion of the Company’s Board of Directors (the \"Board\") from eleven to thirteen members and the election of Co-Chief Executive Officers Michael Battles and Eric Gerstenberg to the Board, all effective immediately following the Company's board meeting on August 29, 2024.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/0000822818-24-000037-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"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"}