CLEAN HARBORS Business Summary

Clean Harbors Inc. (CLH) operates a vertically integrated business model as North America’s leading provider of environmental and industrial services, generating revenue through a mix of service-based contracts and product sales. The company is organized into two primary segments: Environmental Services (ES) and Safety-Kleen Sustainability Solutions (SKSS). The ES segment provides end-to-end hazardous waste management, including collection, transportation, incineration, and landfill disposal, while the SKSS segment focuses on the circular economy by re-refining used motor oil into high-quality base oils and lubricants. Clean Harbors maintains a dominant market position by owning a massive network of specialized assets, including over 50 treatment and disposal facilities and the largest re-refining capacity in North America. Its primary direct competitors include Waste Management (WM), Republic Services (RSG), Veolia, and GFL Environmental; Clean Harbors distinguishes itself from these peers by its specialized focus on hazardous waste and its unique position as the continent’s largest used-oil recycler. Founded in 1980 by Alan S. McKim, who currently serves as Executive Chairman and Chief Technology Officer, the company is led by Co-CEOs Michael L. Battles and Eric W. Gerstenberg. Battles, who previously served as the company’s CFO and has a background at PerkinElmer and Deloitte, shares the top executive role with Gerstenberg, a 30-year company veteran who rose through the ranks from frontline operations to COO. The leadership team is supported by CFO Eric J. Dugas, formerly of Deloitte, and CIO Sharon M. Gabriel. The Board of Directors features high-profile industry and policy experts, including Lead Independent Director Edward G. Galante (former Senior VP at ExxonMobil), Karyn Polito (former Lieutenant Governor of Massachusetts), and Robert Willett (CEO of Cognex). This leadership structure combines deep institutional knowledge with external strategic expertise to drive the company’s 'Vision 2027' growth strategy and its expansion into emerging markets like PFAS remediation.