Koppers Again Named Among America's Most Responsible Companies by Newsweek

Fifth Consecutive Year of Recognition and Highest Ranking Ever

PITTSBURGH, Dec. 18, 2024 /PRNewswire/ -- Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals and carbon compounds, has been named to America's Most Responsible Companies 2025 list by Newsweek magazine for the fifth consecutive year. Koppers achieved its highest placement ever, ranking No. 113 out of 600 finalists and No. 9 out of 56 in the Materials & Chemicals category.

"Koppers is pleased to have once again earned a spot on this noteworthy list and is especially proud to be in the top ten among Materials & Chemicals companies," said Chief Executive Officer Leroy Ball. "It is a meaningful recognition for our global team who works hard every day to protect the safety of our people and communities, mitigate our impact on the environment, and provide our customers with critical products and services."

Notable results achieved by Koppers include:

• Accomplishing the goal of a 50% reduction in scope 1 and scope 2 greenhouse gas emissions (GHG) against a 2007 baseline, seven years ahead of schedule
• Achieving the lowest Total Recordable Injury Rate (2.67) since 2018
• Becoming the first in the U.S. market to introduce a penflufen-based preservative, a new patented wood protection technology, to extend the life of treated wood via pressure treatment
• Updating the company's materiality assessment, in accordance with new 2021 GRI standards
• Publishing Koppers Taskforce on Climate-Related Financial Disclosures (TCFD) report

Selected from the 2,000 largest publicly traded companies headquartered in the U.S., each winner received scores based on environmental, social and corporate governance information. These three scores were combined to assess each company's overall corporate social responsibility score. The analysis is based on data from 30 publicly reported key performance indicators, such as energy usage and charitable donations, as well as a reputation survey of more than 26,000 U.S. consumers.

The full America's Most Responsible Companies list can be viewed here. To learn more about Koppers Sustainability reporting, 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 2,200 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 [e-mail] or 412-227-2025.  Inquiries from the investment community should be directed to Ms. Quynh McGuire at [e-mail] 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 resulting 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, or in Koppers communications and discussions with investors and analysts in the normal course of business through meetings, phone calls and conference calls, regarding future dividends, expectations with respect to sales, earnings, cash flows, operating efficiencies, restructurings, 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, the impact of changes in commodity prices, such as oil and copper, on product margins; 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; 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; availability and fluctuations in the prices of key raw materials; disruptions and inefficiencies in the supply chain; economic, political and environmental conditions in international markets; changes in laws; the impact of environmental laws and regulations; 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. 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.

For Information:		Jessica Black, Manager, Corporate Communications
		412 227 2025 [e-mail]

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SOURCE KOPPERS HOLDINGS INC.

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