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

PITTSBURGH, 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:

• Achieving the lowest Total Recordable Incident Rate (TRIR) in company history.
  
  
• Reaching the lowest Scope 1 and 2 greenhouse gas emissions since reporting began in 2007. 
   
• 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.
  
  
• Introducing a refreshed 2030 Sustainability Strategy, including an updated set of greenhouse gas emissions goals. 
  
  
• Publishing its 2024-2025 TCFD Report, the company's third and final edition as Koppers will transition to International Financial Reporting Standards (IFRS). 
  
  
• 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," said Chief Executive Officer and Chair Leroy Ball. "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."

"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," added Stephanie Apostolou, Chief Legal and Sustainability Officer and Secretary. "Our team is energized by the opportunities ahead as we continue to evolve our approach to deliver value for our employees and our stakeholders."

To read the 2025 CSR and learn more about Sustainability at Koppers, click here.

About Koppers

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 [email protected] or 412-227-2025. Inquiries from the investment community should be directed to Ms. Quynh McGuire at [email protected] or 412-227-2049.

Safe Harbor Statement

Certain statements in this press release are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and may include, but are not limited to, statements about sales levels, acquisitions, restructuring, declines in the value of Koppers assets and the effect of any related impairment charges, profitability and anticipated expenses and cash outflows. All forward-looking statements involve risks and uncertainties.

All statements contained herein that are not clearly historical in nature are forward-looking, and words such as "outlook," "guidance," "forecast," "believe," "anticipate," "expect," "estimate," "may," "will," "should," "continue," "plan," "potential," "intend," "likely," or other similar words or phrases are generally intended to identify forward-looking statements. Any forward-looking statement contained herein, in other press releases, written statements or other documents filed with the Securities and Exchange Commission, regarding future dividends, expectations with respect to sales, earnings, cash flows, operating efficiencies, restructurings, cost reduction efforts, transformation initiatives, product introductions or expansions, the benefits of acquisitions, divestitures, joint ventures or other matters as well as financings and debt reduction, are subject to known and unknown risks, uncertainties and contingencies.

Many of these risks, uncertainties and contingencies are beyond our control, and may cause actual results, performance or achievements to differ materially from anticipated results, performance or achievements. Factors that might affect such forward-looking statements include, among other things, availability of and fluctuations in the prices of key raw materials, including coal tar, lumber and scrap copper; the impact of changes in commodity prices, such as oil, copper and chemicals, on product margins; the successful implementation of multi-year cost mitigation programs; the extent of the dependence of certain of our businesses on certain market sectors and customers; economic, political and environmental conditions in international markets, including governmental changes, tariffs, restrictions on trade and restrictions on the ability to transfer capital across countries; geopolitical events (including the current war in the Middle East); current and potential future tariffs or duties; general economic and business conditions; potential difficulties in protecting our intellectual property; the ratings on our debt and our ability to repay or refinance our outstanding indebtedness as it matures; our ability to operate within the limitations of our debt covenants; unexpected business disruptions; potential delays in timing or changes to expected benefits from cost reduction efforts; timing and results of any transformation initiatives, including estimates and assumptions related to the cost and the anticipated benefits of the transformation initiatives; potential impairment of our goodwill and/or long-lived assets; demand for Koppers goods and services; competitive conditions; capital market conditions, including interest rates, borrowing costs and foreign currency rate fluctuations; disruptions and inefficiencies in the supply chain; changes in laws; the impact of environmental laws and regulations and compliance therewith; unfavorable resolution of claims against us, as well as those discussed more fully elsewhere in this release and in documents filed with the Securities and Exchange Commission by Koppers, particularly our latest annual report on Form 10-K and any subsequent filings by Koppers with the Securities and Exchange Commission. We caution you that the foregoing list of important factors may not contain all of the material factors that are important to you. In addition, in light of these risks and uncertainties, the matters referred to in the forward-looking statements contained in this release may not in fact occur. Any forward-looking statements in this release speak only as of the date of this release, and we undertake no obligation to update any forward-looking statement to reflect events or circumstances after that date or to reflect the occurrence of unanticipated events.

SOURCE KOPPERS HOLDINGS INC.