Clean Harbors Closes $775M EnviroServe and ES&H Acquisitions, Issues $600M Senior Notes
CLH sits 60% above its 52-week low of $201.34.
Summary
Clean Harbors completed its $775 million acquisitions of EnviroServe and ES&H, funded by a $600 million senior notes offering. The combined businesses are expected to add ~$340 million in annual revenue and ~$87 million in post-synergy Adjusted EBITDA.
Key Events · Financing and Capital Events · CLH
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Acquisitions Completed
Clean Harbors completed the EnviroServe acquisition on October 2, 2026 and the ES&H acquisition on September 18, 2026, for a combined purchase price of $775 million.
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Financing via Senior Notes
The company issued $600 million aggregate principal amount of 6.250% senior notes due 2034 on October 1, 2026, with $470 million of net proceeds used to fund the EnviroServe purchase and the remainder to repay revolver borrowings used for the ES&H acquisition.
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Deal Economics
The combined acquisitions are expected to generate approximately $340 million in annual revenue and $87 million in post-synergy Adjusted EBITDA, equating to a post-synergy multiple of 8.9x.
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Strategic Expansion
EnviroServe adds 40 locations and permits in 48 states, expanding Technical Services collection capabilities, while ES&H adds 13 service branches in the Gulf region, deepening Field Services and emergency response presence.
Analysis · CLH · Energy & Transportation
Clean Harbors completed its two previously announced acquisitions for a combined $775 million and issued $600 million of 6.250% senior notes due 2034 to fund them. The press release adds new material details: the ES&H acquisition closed September 18, 2026, the EnviroServe acquisition closed October 2, 2026, and the combined businesses are expected to generate approximately $340 million in annual revenue with post-synergy Adjusted EBITDA of about $87 million, implying an 8.9x multiple. This is a significant capital deployment event that expands the company's Technical Services and Field Services businesses, funded by new long-term debt.
How filings like this one have moved
In the 30 days to Oct 5, 2026, 29.2% of the 1496 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.63%. These are measured outcomes after filings of this importance, not a forecast for this one.
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At the time of this filing, CLH was trading at $322.37 on NYSE in the Energy & Transportation sector, with a market capitalization of approximately $17B. The 52-week trading range was $201.34 to $335.94. This filing was assessed with neutral market sentiment and an importance score of 7 out of 10.