$CLH

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.

Original reporting
Published Oct 5, 2026, 1:02 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Oct 5, 2026, 1:24 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
AlphAI market briefMergers & acquisitions
Primary signal
$CLH
Bullish
high confidence
Mentioned
$CLH
Relevance
9/10
AlphAI data visualization · based on stocktitan.net
Decision brief

The 30-second read

$CLHBullishHigh
01

Why it matters

The transaction adds a sizable service line to Clean Harbors, likely supporting revenue growth and offering cross‑selling opportunities.

02

Market read

The deal is a material M&A event for Clean Harbors, likely influencing its stock price and the broader environmental services sector.

03

What to watch

Financing terms and potential regulatory scrutiny could affect the net benefit.

Relevance 9/10Novelty 9/10Timing: immediate today

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.

Company-level read

Ticker impact

$CLHBullishHigh confidence
Context

Clean Harbors completed the $470 million acquisition of EnviroServe, adding waste‑management capabilities.

Expected impact

potential modest upside as the market prices in the strategic acquisition

Evidence & confidence

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

  • Clean Harbors

    US‑listed environmental services firm acquiring EnviroServe.

  • EnviroServe

    Private waste‑management provider being acquired.

  • One Rock Capital Partners

    Seller of EnviroServe.

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One Rock completes sale of EnviroServe to Clean Harbors for $470m

One Rock Capital Partners sold EnviroServe Inc. to Clean Harbors, Inc. (CLH) for $470 million. EnviroServe offers environmental and waste management services. CLH's Co-CEO Mike Battles noted EnviroServe's growth and capabilities. One Rock expanded EnviroServe during its ownership. The transaction was previously announced and has now been completed.

$CLHMed

CLH Looks 22.8% Overvalued on GF Value™

William Blair initiated coverage on Clean Harbors Inc (CLH) with an Outperform rating and a $379-$444 price target, citing reshoring and data center growth trends. GF Value™ estimates CLH is 22.8% overvalued at $315.70, with a GF Score™ of 87/100. Insiders sold $63.4M in shares over 12 months, while 7 gurus hold positions, with mixed activity. CLH's P/E ratio is 38.31x, above its 5-year median of 28.75x.