Clean Harbors issues $600M notes to fund EnviroServe and ES H acquisitions

Clean Harbors issued $600 million in 6.250% senior notes due 2034; $470 million finances the EnviroServe acquisition (closed October 2, 2026) and remaining proceeds repay revolving credit used for the ES H acquisition (closed September 18, 2026). The deals themselves were previously announced, and the financing is execution of known strategy rather than new material information.

Clean Harbors borrowed $600 million by issuing bonds to pay for two environmental services companies it is acquiring. The acquisitions were already public news; this filing just describes how they financed it.