Clean Harbors to Acquire EnviroServe for $470M in Cash
CLH sits 58% above its 52-week low of $201.34 on light trading volume (0.3× avg).
Summary
Clean Harbors announced a definitive agreement to acquire EnviroServe for $470 million in cash, adding a national environmental services platform with $250 million in revenue and expected $25 million in cost synergies.
Key Events · M&A and Partnerships · CLH
-
Acquisition of EnviroServe
A definitive agreement has been signed to acquire EnviroServe from One Rock Capital Partners for $470 million in cash, expanding the environmental services network with 40 locations and permits in 48 states.
-
Financial Impact
EnviroServe generates approximately $250 million in revenue and $27 million in adjusted EBITDA. $25 million in cost synergies are expected over two years, resulting in a post-synergy multiple of about 9x adjusted EBITDA.
-
Funding and Leverage
The acquisition will be funded through available cash and additional debt financing, increasing leverage but supporting the capital allocation strategy of profitable growth.
-
Strategic Fit
EnviroServe's 10-day transfer facilities, railcar cleaning sites, and emergency response assets complement the Technical Services and Field Services businesses, with meaningful cross-selling opportunities.
Analysis · CLH · Energy & Transportation
A definitive agreement has been signed to acquire EnviroServe for $470 million in cash, expanding the environmental services footprint with 40 locations and a national customer base. The deal is expected to close in the second half of 2026, funded by available cash and new debt. EnviroServe generates roughly $250 million in revenue and $27 million in adjusted EBITDA, and $25 million in cost synergies are projected over two years, bringing the post-synergy multiple to about 9x adjusted EBITDA. This is a meaningful tuck-in acquisition that strengthens the company's Technical Services and Field Services segments, though it adds leverage and integration risk.
How filings like this one have moved
In the 30 days to Oct 5, 2026, 36.9% of the 964 measured filings Wiseek scored 8 moved their stock by 5% or more by the next session's close. The median move was -0.65%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, CLH was trading at $317.45 on NYSE in the Energy & Transportation sector, with a market capitalization of approximately $16.8B. The 52-week trading range was $201.34 to $335.94. This filing was assessed with positive market sentiment and an importance score of 8 out of 10.