A $470 million sale transfers EnviroServe's cleanup and waste business to Clean Harbors.
One Rock Capital Partners sold EnviroServe and related affiliates to Clean Harbors (CLH) for $470 million. EnviroServe provides environmental and waste management services. Both companies expressed optimism about the deal's potential for growth and integration.
How this was made
The 30-second read
Why it matters
The transaction adds a sizable service line to Clean Harbors, likely supporting revenue growth and offering cross‑selling opportunities.
Market read
The deal is a material M&A event for Clean Harbors, likely influencing its stock price and the broader environmental services sector.
What to watch
Financing terms and potential regulatory scrutiny could affect the net benefit.
Background
One Rock Capital Partners sold its portfolio company EnviroServe to Clean Harbors for $470 million, expanding Clean Harbors' waste‑management capabilities across North America.
Ticker impact
Clean Harbors completed the $470 million acquisition of EnviroServe, adding waste‑management capabilities.
potential modest upside as the market prices in the strategic acquisition
A sizable, strategic acquisition announced today; investors typically reward expansion moves.
Market effects
Strengthens the environmental services sector, may pressure peers to consider consolidation.
North American waste‑management market sees increased concentration.
Highlights ongoing M&A activity in the ESG‑focused services space.
Counterpoint
The acquisition could be accretive but integration risk may weigh on the stock.
Key entities
- CompanyClean Harbors
US‑listed environmental services firm acquiring EnviroServe.
- CompanyEnviroServe
Private waste‑management provider being acquired.
- Private equityOne Rock Capital Partners
Seller of EnviroServe.

