Koppers Publishes 2025 Corporate Sustainability Report Highlighting Record Safety and Emissions Performance

SUSTAINABILITY SPOTLIGHT

Koppers Publishes 2025 Corporate Sustainability Report Highlighting Record Safety and Emissions Performance and Refreshed 2030 Strategy

separatorPITTSBURGH, June 25, 2026 /PRNewswire/

Koppers Holdings Inc. (NYSE: KOP) today published its 2025 Corporate Sustainability Report (CSR), detailing the company's progress in advancing its sustainability goals and introducing the framework for its refreshed 2030 Sustainability Strategy.

Some key highlights from the 2025 CSR include:

1
Achieving the lowest Total Recordable Incident Rate (TRIR) in company history.
2
Reaching the lowest Scope 1 and 2 greenhouse gas emissions since reporting began in 2007.
3
Earning the EcoVadis Silver medal with a year-over-year score increase of 11 points, moving Koppers from 76th to 88th percentile in global rankings.
4
Introducing a refreshed 2030 Sustainability Strategy, including an updated set of greenhouse gas emissions goals.
5
Publishing its 2024-2025 TCFD Report, the company's third and final edition as Koppers will transition to International Financial Reporting Standards (IFRS).
6
Being named to Newsweek's "America's Most Responsible Companies" for the sixth straight year as well as Time's "Best Mid-Size Companies."
The Koppers team has worked with intention to embed sustainability into our culture and core business processes. This purposeful approach has positioned us to better respond to changing market dynamics and customer expectations, while supporting long-term resilience amid our continued evolution. We are proud of the progress we've achieved, made possible by the commitment of our employees around the world.

Leroy Ball

Chief Executive Officer and Chair
In addition to sharing our 2025 progress, Koppers is pleased to introduce the framework for our 2030 Sustainability Strategy, a significant step forward in our commitment to responsible growth and long-term value creation. Our team is energized by the opportunities ahead as we continue to evolve our approach to deliver value for our employees and our stakeholders.

Stephanie Apostolou

Chief Legal and Sustainability Officer and Secretary

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About Koppers

Carmeuse Americas

Koppers (NYSE: KOP) is an integrated global provider of essential treated wood products, wood preservation technologies and carbon compounds. Our team of approximately 1,850 employees create, protect and preserve key elements of our global infrastructure – including railroad crossties, utility poles, outdoor wooden structures, and production feedstocks for steel, aluminum and construction materials, among others – applying decades of industry-leading expertise while constantly innovating to anticipate the needs of tomorrow. Together we are providing safe and sustainable solutions to enable rail transportation, keep power flowing, and create spaces of enjoyment for people everywhere. Protecting What Matters, Preserving The Future. Learn more at Koppers.com.

Inquiries from the media should be directed to Ms. Jessica Franklin Black at BlackJF@koppers.com or 412-227-2025.

Inquiries from the investment community should be directed to Ms. Quynh McGuire at McGuireQT@koppers.com or 412-227-2049.

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