Clean Harbors, Inc. ("Clean Harbors") (NYSE:CLH), the leading provider of environmental and industrial services throughout North America, today announced that senior management will participate in fireside chats at the following events.

Event: 16th Annual Wells Fargo Industrials & Materials Conference

Date: Tuesday, June 9, 2026

Time: 2:30 p.m. EDT

Event: Stifel 2026 Investor Summit

Date: Wednesday, June 10, 2026

Time: 11:30 a.m. EDT

Clean Harbors will webcast these events. To access the live or archived webcast, visit the "Investor Relations" portion of Clean Harbors' website at www.cleanharbors.com.

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.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260527400740/en/

Eric J. Dugas

EVP and Chief Financial Officer

Clean Harbors, Inc.

781.792.5100

InvestorRelations@cleanharbors.com

Jim Buckley

SVP Investor Relations

Clean Harbors, Inc.

781.792.5100

Buckley.James@cleanharbors.com

Clean Harbors to Participate in Upcoming Investor Conferences