Casella Releases 2026 Sustainability Report

Casella Waste Systems, Inc. (Nasdaq: CWST) (“Casella”), a regional solid waste, recycling, and resource management services company, today released its 2026 Sustainability Report, highlighting how continued focus and investment in its employees, infrastructure and services is driving measurable environmental and operating performance.

“As Casella continues to grow, we are creating more opportunities to invest in our team and infrastructure, and deliver sustainable solutions to some of society’s most complex waste and resource management challenges,” said Ned Coletta, President and CEO of Casella Waste Systems, Inc. “Strong environmental performance and strong operating performance go hand-in-hand, creating an alignment between environmental and economic sustainability.”

The report highlights progress toward Casella’s 2030 Sustainability Goals, including several significant results:

• More resources recovered: Casella and its customers now recover more than 1.6 million tons of material annually, an increase of more than 500,000 tons since 2019.

• Greater climate benefit: For every ton of greenhouse gas emitted through Casella’s operations, the company estimates its services prevent 5.7 tons of emissions elsewhere in the economy through recycling, renewable energy and carbon sequestration, surpassing its previously established 2030 goal of 5.0

• Stronger communities: Casella employees contributed more than 24,000 volunteer hours in 2025, a 90 percent increase from the prior year.

The report also details continued investments in safety programs, recycling infrastructure, renewable energy, fleet efficiency, employee training and development, and technologies designed to improve safety and environmental performance.

“Our 2030 Sustainability Goals give us clear measures of where we want to go, and the progress we are making gives us confidence in our ability to get there,” Coletta said. “We also recognize that our work is never finished. As new opportunities and challenges emerge each day, we remain committed to having a positive impact on the world around us while driving value for our shareholders.”

The 2026 Sustainability Report is available at www.casella.com/sustainability