On August 12, 2026, Clean Harbors announced a definitive agreement to acquire EnviroServe for $470 million in cash from an affiliate of One Rock Capital Partners. The transaction is expected to close in the second half of 2026, subject to regulatory approval and customary conditions. EnviroServe operates a network of 40 locations across 48 states with approximately $250 million in annual revenues and $27 million in Adjusted EBITDA. Clean Harbors anticipates realizing $25 million in cost synergies within two years, resulting in a post-synergy acquisition multiple of approximately nine times Adjusted EBITDA. The company plans to fund the deal using available cash and additional debt financing. This acquisition expands Clean Harbors' environmental services footprint through EnviroServe's 10-day transfer facilities, rail cleaning capabilities, and specialized fleet.

Clean Harbors reported second-quarter 2026 results with revenue increasing 12% to a record $1.74 billion and net income rising 34% to $170.5 million, or $3.22 per diluted share. Adjusted EBITDA grew 22% to $409.0 million, expanding margins by 190 basis points year-over-year. The company announced a ten-year disposal contract with an estimated value of $600 million and entered into a definitive agreement to acquire ES&H for $305 million in cash to expand its Field Services business. Management raised full-year 2026 Adjusted EBITDA guidance by $110 million to a midpoint of $1.38 billion and adjusted free cash flow guidance by $30 million to a midpoint of $550 million. Clean Harbors operates in the environmental and industrial services industry, providing hazardous waste management, emergency response, and recycling services.