secwatch.observer — SEC 8-K summary
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Issuer:     CLEAN HARBORS INC (CLH)
CIK:        0000822818
Form:       8-K
Filed at:   2026-08-12T16:26:33+00:00
Accession:  0000822818-26-000037
Event type: m_and_a
Sentiment:  positive
Materiality: 0.75
Item codes: 8.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Clean Harbors acquires EnviroServe for $470M; $25M synergies targeted
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- Deal valued at $470M cash; expected close H2 2026, subject to regulatory approval.
- EnviroServe: ~$250M revenue, ~$27M adjusted EBITDA, 40 locations, 2,500 customers, 700+ employees.
- Clean Harbors expects $25M cost synergies over two years, post-synergy multiple ~9x EBITDA.
- Acquisition funded via available cash and additional debt; seller is One Rock Capital Partners.
- EnviroServe has 85% recurring revenue; top 10 customer tenure exceeds 16 years; sub-1.0 TRIR safety record.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/822818/000082281826000037/0000822818-26-000037-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/822818/000082281826000037/clh-20260812.htm
  HTML page:      https://secwatch.observer/filing/0000822818-26-000037

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer