Clean Harbors is paying $470m for EnviroServe, and the nine times multiple in its own announcement only arrives after synergies almost as large as the target's entire earnings

Twenty five million dollars of savings that have not happened yet are doing most of the work in this price.

Clean Harbors told the Securities and Exchange Commission on Wednesday lunchtime that it has agreed to buy EnviroServe, a national environmental and waste management company, from an affiliate of One Rock Capital Partners for $470m in cash. The filing went in at 12:26 Eastern under item 8.01, with the press release attached as Exhibit 99.1. Closing is expected in the second half of 2026, subject to regulatory approval.

EnviroServe is based in Sandy, Utah. It serves nearly 2,500 customers from 40 locations, holds permits in 48 states, and runs 18 ten-day transfer facilities, several solidification facilities and five railcar cleaning sites. On the company's figures it is expected to generate about $27m of adjusted EBITDA on about $250m of revenue, a margin of roughly 10.8 percent.

The multiple

The release describes "a post-synergy acquisition multiple of approximately nine times Adjusted EBITDA," and that is arithmetic rather than argument. Take $470m over $27m and the answer is 17.4 times. Add the approximately $25m of cost synergies Clean Harbors expects to realise over the first two years and the denominator becomes $52m, at which point the multiple is 9.0.

So the savings the buyer has yet to make are worth almost as much as everything the business currently earns.

Clean Harbors says it will fund the purchase from available cash and new debt. Mike Battles, one of its two co-chief executives, said in the release that after the synergies are realised the company expects the acquisition to be "meaningfully accretive to earnings and cash flow." Nothing in the filing sets out what happens to that description if the savings run late.

What the buyer says it is getting

Eric Gerstenberg, the other co-chief executive, points at the transfer network. Ten-day transfer facilities are the intermediate points where waste is consolidated before it moves to a disposal or recycling site, and Clean Harbors owns the sites at the far end of that chain, so the stated logic is throughput into assets it already has. The release also names emergency response assets and railcar cleaning as additions to its Field Services business, and lists a vehicle and equipment fleet among the strategic benefits.

Clean Harbors is a Massachusetts company, trades on the New York Stock Exchange as CLH, and reports its environmental work through the Environmental Services segment the release says this deal expands.