NORWELL, Mass. — Clean Harbors, Inc. (NYSE: CLH) completed its acquisitions of EnviroServe and ES&H for a combined purchase price of $775 million on October 5, 2026. To fund the strategic additions, the industrial and environmental waste solutions provider combined existing cash balances with a newly issued $600.0 million aggregate principal amount of 6.250% senior notes due 2034.
Key Takeaways
- Dual Strategic Acquisitions: Clean Harbors acquired EnviroServe (closed October 2, 2026) and ES&H (closed September 18, 2026) for an aggregate consideration of $775 million.
- Debt and Cash Financing: The company utilized $470 million of net proceeds from its 6.250% senior notes due 2034 toward EnviroServe, directing remaining proceeds to pay down revolving credit borrowings utilized for ES&H, alongside balance-sheet cash.
- Valuation Multiples: The acquired units are projected to deliver $340 million in annualized revenue and $87 million in post-synergized Adjusted EBITDA, pricing the transaction at 8.9x Adjusted EBITDA.
Expanding Technical Services and Regional Footprint
The dual transactions expand Clean Harbors’ core business lines across North America. EnviroServe brings an established nationwide network of 10-day hazardous and non-hazardous waste transfer locations, railcar cleaning depots, and specialized industrial maintenance facilities. Integrating these depots allows Clean Harbors to route larger waste streams directly into its owned network of incineration and recycling infrastructure.
Meanwhile, the acquisition of ES&H strengthens Clean Harbors’ Field Services segment along the U.S. Gulf Coast. ES&H is a prominent provider of marine and emergency response services, environmental remediation, and industrial tank cleaning, providing heightened regional capacity across high-density energy and petrochemical corridors.
| Transaction Parameter | Disclosed Value | Primary Strategic Source |
|---|---|---|
| Combined Transaction Purchase Price | $775 million | Clean Harbors Exhibit 99.1 Press Release |
| Senior Notes Offering Principal | $600.0 million | SEC Form 8-K Item 1.01 |
| Notes Net Proceeds Allocated to EnviroServe | $470 million | SEC Form 8-K Item 1.01 |
| Expected Annual Combined Revenue | ~$340 million | Clean Harbors Exhibit 99.1 Press Release |
| Post-Synergized Annual Adjusted EBITDA | ~$87 million | Clean Harbors Exhibit 99.1 Press Release |
| Post-Synergy Deal Valuation Multiple | 8.9x EBITDA | Clean Harbors Exhibit 99.1 Press Release |
Capital Structure and Senior Notes Indenture Mechanics
To fund the acquisitions without putting undue pressure on liquidity, Clean Harbors tapped the corporate bond market. On October 1, 2026, the company entered into an Indenture with U.S. Bank Trust Company, National Association as trustee, placing $600.0 million of 6.250% senior unsecured notes due September 30, 2034 with qualified institutional buyers under Rule 144A and Regulation S.
The notes carry key structural provisions standard in high-yield and crossover corporate paper:
- Coupon and Payment Dates: Interest is payable semi-annually in arrears on March 31 and September 30 of each year, beginning March 31, 2027, until maturity on September 30, 2034.
- Sources and Uses: Clean Harbors deployed $470 million of the net offering proceeds to close EnviroServe on October 2, 2026. The remaining debt proceeds are designated to extinguish revolving credit facility borrowings used when closing ES&H on September 18, 2026. Existing cash on hand covered the balance of the $775 million transaction total.
- Call Schedule & Make-Whole: Prior to September 30, 2029, Clean Harbors retains the right to redeem notes at 100% of par plus an applicable make-whole premium. On or after September 30, 2029, the notes become callable at predetermined declining step-down redemption prices.
- Equity Clawback: Up to 40% of the aggregate principal amount may be redeemed prior to September 30, 2029 at 106.250% of par using net proceeds from eligible equity offerings.
- Investment-Grade Covenant Suspension: The indenture contains customary restrictive covenants covering debt incurrence, restricted payments, asset sales, and affiliate transactions. Notably, these covenants suspend if the notes achieve investment-grade ratings from at least two credit rating agencies, a milestone relevant to institutional investors tracking corporate bond rating migrations.
Balance-Sheet Impact and What to Watch Next
By pairing long-term fixed-rate senior debt with cash reserves, Clean Harbors maintains operational agility while preserving capacity on its credit facility. Creditors and equity analysts will monitor how quickly the projected $87 million in synergized EBITDA materializes, which directly influences the company’s leverage profile and debt service coverage metrics.
Key upcoming milestones include Clean Harbors’ third-quarter 2026 earnings release, where management is scheduled to detail consolidated leverage ratios, updated full-year capital expenditure forecasts, and integration timelines for EnviroServe’s rail and transfer facilities.
Disclosure: This article is for informational purposes only and is not investment advice.
Sources
- Clean Harbors, Inc. Exhibit 99.1 Press Release: Clean Harbors Completes Acquisitions of EnviroServe and ES&H (October 5, 2026)
- U.S. Securities and Exchange Commission: Clean Harbors Form 8-K Current Report (October 5, 2026)
- Clean Harbors Exhibit 4.1: Indenture for 6.250% Senior Notes Due 2034 with U.S. Bank Trust Company (October 1, 2026)