Clean Harbors (CLH) investor relations material

Financial performance and guidance

• Raised full-year guidance, now forecasting 9% consolidated EBITDA growth, up from 5% in February, with environmental services expected to grow 6.5% year-over-year.

• Q1 results exceeded expectations across most business units, with strong momentum continuing into Q2.

• Environmental services guidance increased by $15 million, and SKSS guidance raised by $30 million due to higher base oil prices.

• Landfill volumes and project work remain strong, supporting increased guidance.

• Share repurchases of $25 million in Q1, with continued buybacks balanced against M&A and capital investments.

Business segment highlights

• Technical services saw high waste volumes, expanded waste stream collection, and strong pricing momentum.

• Field services benefited from branch expansion, investments in sales and equipment, and improved emergency response capabilities.

• Safety-Kleen branch business maintained consistent, subscription-like performance with strong pricing power.

• SKSS segment uplifted by tightened base oil supply and increased demand from major oil customers.

PFAS remediation and growth

• PFAS pipeline growing 25%-35% quarter-over-quarter, with opportunities in military, airports, firehouses, and drinking water remediation.

• EPA and Department of Defense guidance validated incineration as a scalable PFAS solution, supporting long-term growth.

• PFAS work expected to be margin accretive, contributing to the goal of 30%+ segment margins.

• Pipeline includes both near-term private sector projects and longer-cycle public sector opportunities.