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

Fifth Consecutive Year of Recognition and Highest Ranking Ever

Koppers Holdings Inc., 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, with corporate headquarters in Pittsburgh, Pennsylvania, is an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds.  Our products and services are used in a variety of niche applications in a diverse range of end markets, including the railroad, specialty chemical, utility, residential lumber, agriculture, aluminum, steel, rubber, and construction industries.  We serve our customers through a comprehensive global manufacturing and distribution network, with facilities located in North America, South America, Australasia, and Europe.  The stock of Koppers Holdings Inc. is publicly traded on the New York Stock Exchange under the symbol “KOP.”

Contact:

Ms. Jessica Franklin Black – Media Contact – BlackJF@koppers.com – (412) 227-2025

Source: Koppers Holdings, Inc.