FAQs

When will Clean Harbors release its quarterly results?: View our Calendar of Events.
Where is Clean Harbors based?: Clean Harbors is based in Norwell, Massachusetts. The Company's address is 42 Longwater Drive, Norwell, MA 02061-9149. The telephone number for investor inquiries is 781.792.5000. The Company also has offices located throughout the United States, Canada, Mexico and Puerto Rico. Find a Clean Harbors location.
What does Clean Harbors do?: Clean Harbors is North America’s leading provider of environmental and industrial services. The Company serves a diverse customer base, including a majority of Fortune 500 companies. Its customer base spans a number of industries, including chemical, energy and manufacturing, as well as numerous government agencies. These customers rely on Clean Harbors to deliver a broad range of services such as end-to-end hazardous waste management, emergency spill response, industrial cleaning and maintenance, and recycling services.

Through its Safety-Kleen subsidiary, Clean Harbors also is North America’s largest re-refiner and recycler of used oil and a leading provider of parts washers and environmental services to commercial, industrial and automotive customers. Safety-Kleen provides a broad set of sustainable products and services that keep businesses in balance with the environment. Learn more at Safety-Kleen.com »
Who are the Company's primary customers?: Clean Harbors serves a diverse customer base, including a majority of Fortune 500 companies. Its customer base spans a number of industries, including chemical, energy and manufacturing, as well as numerous government agencies.
Who are Clean Harbors' competitors?: Clean Harbors' competitors range from national service providers to regional firms and a number of smaller companies.
What is Clean Harbors' primary competitive advantage?: Clean Harbors has earned a reputation among its customers as the premier supplier of environmental and industrial services based upon its upon quality, responsiveness, customer service, information technologies, safety and cost effectiveness. Everywhere industry meets the environment, Clean Harbors aims to be a primary resource for its customers.
What is the Company's growth strategy?: As a leading provider of environmental and industrial services, Clean Harbors applies its core competitive strengths to develop and maintain ongoing relationships with a diversified group of customers. At the same time, the Company focuses on continuing to grow its service lines to meet customers’ changing environmental and sustainability needs. Targeted marketing allows Clean Harbors to expand awareness of the breadth of its service offerings to current and future customers.
What is management's background and expertise?: Clean Harbors has a strong and experienced executive management team. The team provides an extensive depth of knowledge and continuity with years of expertise in the environmental and industrial services industries. Alan S. McKim founded Clean Harbors in 1980. He served as Chairman of the Board of Directors and Chief Executive Officer from the Company’s inception to March 2023, when as part of a planned transition he became Executive Chairman and Chief Technology Officer. Co-Chief Executive Officers Michael L. Battles and Eric W. Gerstenberg collectively have more than 40 years of experience and expertise in the environmental and industrial industries. Please visit our Corporate Governance section to learn more about Clean Harbors' senior management.
How many employees does Clean Harbors currently have?: Clean Harbors has approximately 22,000 active full-time employees.
What is the Company's ticker symbol and where is the stock traded?: Clean Harbors, Inc. stock is traded on the New York Stock Exchange (NYSE) under the symbol CLH.
Which financial analysts cover Clean Harbors?: View list of analysts who cover Clean Harbors
Does Clean Harbors have a dividend reinvestment program?: Clean Harbors does not currently offer dividend payments. Therefore, no dividend reinvestment program is available.
How do I buy Clean Harbors stock?: The Company's stock can be purchased through your broker or by using an online investment service. Clean Harbors does not offer a direct stock purchase plan.
Whom can I contact regarding shareholder questions?: Investor Relations Department, Clean Harbors, Inc. at 42 Longwater Drive, Norwell, MA 02061-9149. Email: InvestorRelations@cleanharbors.com
Phone: 781.792.5100
If I have lost my certificate or changed my address, whom do I contact?: The Company's transfer agent and registrar is American Stock Transfer & Trust Company and should be contacted for change of address, lost certificates or other related matters.

American Stock Transfer & Trust Company
40 Wall Street
New York, NY 10005

Shareholder inquiries call: 800.937.5449
How can I obtain an investor package or be placed on the Company's distribution list?: To receive additional corporate information, please email your request to ShareholderServices@cleanharbors.com.
When does Clean Harbors' fiscal year end?: Clean Harbors' fiscal year is based on the calendar year ending December 31.
What are Clean Harbors' revenues?: The Company’s annual revenues for the year ended December 31, 2023 were approximately $5.4 billion.
How many shares of common stock does Clean Harbors have outstanding?: As of December 31, 2023, Clean Harbors had approximately 54.4 million shares of common stock outstanding.
When was Clean Harbors founded?: The Company was founded in 1980 by Alan McKim.
When did Clean Harbors become a public company?: The Company completed its initial public offering in 1987.