Clean Harbors, Inc.

Clean Harbors, Inc. is North America's largest hazardous waste disposal company and a leading provider of environmental and industrial services. The firm, publicly traded on the NYSE under the ticker CLH, operates more than 400 service locations and over 100 disposal facilities across the United States, Canada, Mexico and Puerto Rico. Its customer base includes the majority of Fortune 500 companies, spanning the chemical, manufacturing, energy, government, healthcare, refinery, transportation, utilities and pharmaceuticals sectors.

The company's work covers hazardous and non-hazardous waste management, emergency spill response, industrial cleaning and maintenance, tank cleaning, and recycling and reclamation services. Its subsidiary, Safety-Kleen, provides closed-loop solutions for recycling, reclaiming and reusing used oil and cleaning solvents, and is the largest re-refiner of used oil in North America.

Founded in 1980 by Alan S. McKim at the age of 24, the business began with a single Mack truck and four employees, initially as a tank cleaning operation. The company describes an emphasis on solving difficult problems through innovation and proven methodology, alongside a commitment to responsible, closed-loop recycling and reclamation. Current headcount is not disclosed.