Clean Harbors acquires EnviroServe for $470M; $25M synergies targeted

CLEAN HARBORS INC

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.

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