{"schema_version":"secwatch.filing_event.v1","accession":"0000822818-22-000045","form_type":"8-K","ticker":"CLH","cik":"0000822818","company_name":"CLEAN HARBORS INC","filed_at":"2022-11-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:53.661995+00:00","generated_at":"2026-06-22T16:12:37.357603+00:00","sec_items":["5.02","9.01","6.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Clean Harbors names CFO Battles and COO Gerstenberg as Co-CEOs; founder McKim becomes Executive Chairman","bullets":["Founder Alan McKim steps down as CEO after 42 years; becomes Executive Chairman & CTO effective March 31, 2023.","CFO Michael Battles and COO Eric Gerstenberg promoted to Co-CEOs effective March 31, 2023.","Battles' base salary increases from $540K to $900K; Gerstenberg from $625K to $900K; McKim's reduced to $900K.","Each Co-CEO gets 2023 performance shares at 85% of base salary and time-vesting shares at 285% of base salary.","Battles' severance expands from 12 to 24 months; Gerstenberg remains at 24 months; McKim gets no severance agreement."],"urls":{"canonical":"https://secwatch.observer/filing/0000822818-22-000045","json":"https://secwatch.observer/filing/0000822818-22-000045.json","markdown":"https://secwatch.observer/filing/0000822818-22-000045.md","text":"https://secwatch.observer/filing/0000822818-22-000045.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/822818/000082281822000045/0000822818-22-000045-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/822818/000082281822000045/clh-20221101.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-22T16:12:37.357603+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":"1c7352c410","claim":"Michael L. Battles changed role as Co-Chief Executive Officer and Co-President at CLEAN HARBORS INC.","evidence_excerpt":"Mr. Battles and Mr. Gerstenberg will, effective on March 31, 2023 (the “Effective Date”), be promoted to the Company’s Co-Chief Executive Officers and Co-Presidents","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/822818/000082281822000045/0000822818-22-000045-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Co-Chief Executive Officer and Co-President"}],"fact_type":"executive_change"},{"claim_id":"3ee9afcfc1","claim":"Alan S. McKim changed role as Executive Chairman and Chief Technology Officer at CLEAN HARBORS INC.","evidence_excerpt":"Mr. McKim will become the Company’s Executive Chairman of the Board and Chief Technology Officer.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/822818/000082281822000045/0000822818-22-000045-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"become"},{"label":"Role","value":"Executive Chairman and Chief Technology Officer"}],"fact_type":"executive_change"},{"claim_id":"d42e6fbf95","claim":"Eric W. Gerstenberg changed role as Co-Chief Executive Officer and Co-President at CLEAN HARBORS INC.","evidence_excerpt":"Mr. Battles and Mr. Gerstenberg will, effective on March 31, 2023 (the “Effective Date”), be promoted to the Company’s Co-Chief Executive Officers and Co-Presidents","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/822818/000082281822000045/0000822818-22-000045-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Co-Chief Executive Officer and Co-President"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}