One Rock to Sell EnviroServe to Clean Harbors for $470 Million
One Rock Capital Partners agreed to sell EnviroServe to Clean Harbors (NYSE: CLH) for $470 million. The deal is expected to close in the second half of 2026, pending regulatory approval. Clean Harbors plans to integrate EnviroServe’s remediation, industrial cleaning, rail and waste processing footprint. EnviroServe serves about 2,400 customers across the U.S.
How this was made
The 30-second read
Why it matters
Clean Harbors plans to integrate EnviroServe into its Technical Services and Field Services operations, adding locations, workforce, and customer relationships. The transaction is expected to close in 2H 2026, pending regulatory approval and customary conditions.
Market read
This is a disclosed, time-bound M&A catalyst for CLH with a defined price ($470 million) and a clear close window (2H 2026), making it actionable for deal-risk and integration-execution positioning.
What to watch
No financing structure or synergy/earnings guidance is provided; traders may need to watch for deal financing terms, antitrust/regulatory scrutiny, and integration execution risks.
Background
One Rock Capital Partners acquired EnviroServe via a carve-out from Savage Companies and built it into a standalone platform before selling to a strategic operator.
Ticker impact
Clean Harbors agreed to buy EnviroServe for $470 million, expanding remediation, industrial cleaning, rail services, and waste processing footprint.
Near-term trading likely reflects deal-announcement sentiment and deal-risk discounting; material repricing is more likely as regulatory/closing milestones approach.
The article discloses deal size, scope of assets and services, and expected close window, but provides no financing terms, valuation breakdown, or quantified synergy/earnings impact.
Market effects
Supports the environmental services consolidation narrative, potentially increasing M&A expectations and competitive pressure for remediation, industrial cleaning, and waste processing capacity.
Expands Clean Harbors’ U.S. operating footprint via EnviroServe’s branch and transfer-facility network, which may improve service coverage in multiple geographies.
Limited direct global impact; primarily a U.S. industrial services and waste management consolidation story.
Counterpoint
The headline deal value may not translate into near-term shareholder value if integration costs, customer retention, or regulatory delays reduce expected returns.
Key entities
- public_companyClean Harbors, Inc.
NYSE-listed environmental and waste management services provider acquiring EnviroServe for $470 million.
- companyEnviroServe
Environmental and waste management services provider with remediation, industrial cleaning, rail services, and waste processing capabilities.
- private_equityOne Rock Capital Partners
Private equity firm agreeing to sell EnviroServe to Clean Harbors.
