A North American environmental and industrial services company that collects, treats, and disposes of hazardous and non-hazardous waste, and through its Safety-Kleen arm re-refines used oil into fresh base oil and lubricants for manufacturers, refineries, and others. It began in 1980 when Alan McKim started a four-person tank-cleaning business in the Boston area with a single truck. One of its early jobs was cleaning up the 1984 oil spill from the beached tanker Eldia off Cape Cod, helping launch its emergency-response reputation.
Clean Harbors to acquire EnviroServe for $470 million in cash
Clean Harbors, Inc. (NYSE: CLH) announced a definitive agreement to acquire EnviroServe from an affiliate of One Rock Capital Partners, LLC for $470 million in cash.
Show detailsHide details
The transaction is expected to close in the second half of 2026, subject to regulatory approval and other customary closing conditions.
EnviroServe, headquartered in Sandy, Utah, serves nearly 2,500 customers through 40 locations and holds permits in 48 states, including 18 10-day transfer facilities.
EnviroServe is expected to generate approximately $27 million in annual Adjusted EBITDA on about $250 million in revenues; Clean Harbors anticipates $25 million in cost synergies, implying a post-synergy multiple of roughly 9x Adjusted EBITDA.
Clean Harbors expects to fund the acquisition with available cash and additional debt financing, and plans to realize synergies over the first two years.
The acquisition is intended to expand Clean Harbors' Environmental Services segment, adding railcar cleaning capabilities, a fleet of over 700 vehicles, and more than 1,400 roll-off containers, vacuum boxes, and frac tanks.
8.01 Other Events · 9.01 Financial Statements and Exhibits
Clean Harbors Q2 2026 revenue up 12% to record $1.74B, net income up 34% to $170.5M
Q2 2026 revenue rose 12% to $1.74 billion from $1.55 billion in Q2 2025.
Show detailsHide details
Net income increased 34% to $170.5 million, or $3.22 per diluted share, from $126.9 million, or $2.36 per share, a year earlier.
Adjusted EBITDA grew 22% to $409.0 million, with margin expanding 190 basis points to 23.6%.
Company announced a ten-year disposal contract valued at approximately $600 million and a planned $305 million acquisition of ES&H.
2026 guidance raised: Adjusted EBITDA now expected between $1.35 billion and $1.41 billion; adjusted free cash flow between $520 million and $580 million.
2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits
Clean Harbors founder Alan S. McKim to retire as Executive Chairman and CTO upon appointment of new Chair
Alan S. McKim notified the Board on May 19, 2026, of his intention to retire from the Board and as Chief Technology Officer, effective when a new Chairman is appointed.
Show detailsHide details
The Board expects to appoint an independent Chair later in summer 2026 as part of a planned leadership transition.
McKim's retirement is not due to any disagreement with the company regarding operations, policies, or practices.
McKim founded Clean Harbors in 1980 and served as Chairman and CEO until 2023, when he became Executive Chairman and CTO.
A press release announcing the retirement was issued on May 20, 2026, and furnished as Exhibit 99.1.
5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · 7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits
Clean Harbors shareholders elect four Class I directors and approve executive pay and auditor at 2026 annual meeting
Shareholders elected Edward G. Galante, Alison A. Quirk, Shelley Stewart Jr., and John R. Welch as Class I directors to serve until the 2029 annual meeting.
Show detailsHide details
Clean Harbors held its 2026 Annual Meeting of Shareholders on May 20, 2026, with 50,078,328 shares present out of 53,313,462 outstanding.
The non-binding advisory vote on named executive officer compensation passed with 45,913,184 votes for, 2,642,421 against, and 16,190 abstentions.
Shareholders ratified Deloitte & Touche LLP as independent auditor for fiscal year 2026 with 47,766,968 votes for, 2,300,898 against, and 10,462 abstentions.
The report was filed under Item 5.07 to disclose the final voting results of these shareholder matters.
5.07 Submission of Matters to a Vote of Security Holders · 9.01 Financial Statements and Exhibits
Clean Harbors completes $225M all-cash acquisition of Terra Nova Solutions
Terra Nova Solutions is a regional provider of hazardous and non-hazardous waste services based in the Carolinas, operating five sites.
Show detailsHide details
Clean Harbors, Inc. announced on May 14, 2026, the completion of its acquisition of Terra Nova Solutions for $225 million in cash.
The acquired business is expected to generate $45–50 million in annual revenue and approximately $15 million in Adjusted EBITDA.
Clean Harbors anticipates about $4 million in annual synergies after the first full year, implying a post-synergy multiple of 11.8x.
The acquisition is expected to enhance Clean Harbors' Technical Services and Field Services businesses, with Terra Nova's assets including wastewater treatment and solidification capacity.
8.01 Other Events · 9.01 Financial Statements and Exhibits
Clean Harbors reports record Q1 2026 revenue of $1.46B, raises full-year guidance
First-quarter 2026 revenue was $1.46 billion, up from $1.43 billion in Q1 2025.
Show detailsHide details
Net income rose to $63.2 million, or $1.19 per diluted share, from $58.7 million, or $1.09 per share, a year earlier.
Adjusted EBITDA increased 6% to $247.9 million, with margin expanding 60 basis points to 17.0%.
The company raised its 2026 Adjusted EBITDA guidance midpoint by $40 million to $1.27 billion and adjusted free cash flow midpoint by $10 million to $520 million.