Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental and industrial services throughout North America, today announced that its Board of Directors has authorized a $500 million expansion of the Company’s existing share repurchase program. As of December 1, 2023, approximately $54 million of availability remained in the existing program. Clean Harbors intends to fund the share repurchases through its available cash resources.

“Our share repurchase program has been and will continue to be a core element in our capital allocation strategy,” said Eric J. Dugas, Chief Financial Officer. “To date, we have bought back approximately 8.5 million shares at an average price of approximately $64 a share under our original $600 million stock repurchase plan. We deploy capital with a focus on value creation, whether it is acquisitions, internal investments, share repurchases or debt reduction. We continue to maintain a healthy balance sheet, which is supported by strong cash generation. This affords us significant financial flexibility to execute our Vision 2027 growth strategy and deliver strong returns to our shareholders.”

The repurchase program authorizes Clean Harbors to purchase its common stock on the open market or in privately negotiated transactions periodically. The share repurchases will be made in a manner that complies with applicable U.S. securities laws. The number of shares purchased and the timing of the purchases will depend on a number of factors, including share price, cash required for future business plans, trading volume and other conditions. Clean Harbors has no obligation to repurchase stock under this program and may suspend or terminate the repurchase program at any time.

About Clean Harbors

Clean Harbors (NYSE: CLH) 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. Founded in 1980 and based in Massachusetts, Clean Harbors operates in the United States, Canada, Mexico, Puerto Rico and India. For more information, visit www.cleanharbors.com.

Safe Harbor Statement

Any statements contained herein that are not historical facts are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are generally identifiable by use of the words “believes,” “expects,” “intends,” “anticipates,” “plans to,” “seeks,” “should,” “estimates,” “projects,” “may,” “likely,” or similar expressions. Such statements may include, but are not limited to, statements about the Company’s future share repurchases, and other statements that are not historical facts. Such statements are based upon the beliefs and expectations of Clean Harbors’ management as of this date only and are subject to certain risks and uncertainties that could cause actual results to differ materially, including, without limitation, those items identified as “Risk Factors” in Clean Harbors’ most recently filed Form 10-K and Form 10-Q. Forward-looking statements are neither historical facts nor assurances of future performance. Therefore, readers are cautioned not to place undue reliance on these forward-looking statements. Clean Harbors undertakes no obligation to revise or publicly release the results of any revision to these forward-looking statements other than through its filings with the Securities and Exchange Commission, which may be viewed in the “Investors” section of Clean Harbors’ website at www.cleanharbors.com.

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