Clearwater Paper Corporation (NYSE: CLW) today released its 2026 Sustainability Report, providing an annual update on the company's progress toward its multiyear sustainability goals.

Aligned with the company's strategic sustainability framework, Everyday Responsibility, the report details sustainability efforts and initiatives across three pillars: Resource Stewardship, Trusted Products, and Thriving People and Communities.

"At Clearwater Paper, we build responsibility into every step of our work to ensure our employees work safely, source materials responsibly, operate our mills efficiently, develop sustainable products and support the communities where we operate," said Arsen Kitch, president and chief executive officer. "While 2025 was a challenging year for our industry because of a supply-driven downturn, we remained focused on what we can control: managing costs, serving our customers and continuing to make the capital investments necessary to maintain and improve the performance of our assets. We believe this focus is key to the company's long-term success."

The 2026 Sustainability Report highlights Clearwater Paper's progress throughout 2025 and showcases achievements, initiatives and stories that demonstrate the company's Everyday Responsibility framework. Key highlights include:

• Reduced the lost-time injury rate by more than 50% year over year.
• Reduced safety risks by more than 20% through the aspects and impacts process.
• Reduced Scope 2 emissions and integrated the Augusta facility into greenhouse gas emissions reporting processes.
• Improved water intake intensity by 6%, advancing toward the company's goal of a 10% reduction by 2030.
• Received Biodegradable Products Institute compostable certification at the Lewiston and Cypress Bend mills, covering most folding carton and food-service grades.
• Launched Velora™, a new lightweight paperboard option, in early 2026.
• Continued support for nonprofit organizations, local schools and communities through charitable giving, grants, volunteerism and sustainability education initiatives.

"We take our commitment to Everyday Responsibility seriously and look forward to continuing this work alongside our customers, employees and suppliers," Kitch said. "Every step forward reflects our shared dedication to making a positive impact in the communities where we live and work."

Clearwater Paper is committed to maintaining high standards of quality, operating safely, engaging with local communities and serving as a responsible steward of natural resources. To learn more about the company's sustainability efforts and progress, view the 2026 Sustainability Report here.

About Clearwater Paper

Clearwater Paper is a premier independent supplier of paperboard packaging products to North American converters. Headquartered in Spokane, Wash., our team produces high-quality paperboard that provides sustainable packaging solutions for consumer goods and food service applications. For additional information, please visit our website at www.clearwaterpaper.com

Forward-Looking Statements

This communication contains “forward-looking” statements as that term is defined in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995, as amended, including statements regarding sustainability strategies, commitments and goals; customers; business objectives; GHG reduction; product quality, attributes and development; employees; and safety. These forward-looking statements are based on current expectations that are subject to change, and actual results may differ materially from the forward-looking statements. Factors that could cause actual results to differ materially include, among others, the achievement of anticipated benefits of strategic transactions and other risk factors as detailed from time to time in the company's public filings with the Securities and Exchange Commission. The company does not undertake to update any forward-looking statements based on new developments or changes to the company’s expectations.

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