PITTSBURGH - Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals and carbon compounds, today announced that it will host its Investor Day on Monday, September 13, 2021, beginning at 9 a.m. Eastern time.

The presentation will feature an in-depth review of the business as well as the company's strategic initiatives through 2025. Key speakers will include: Stephen Tritch - Chairman of the Board

Leroy Ball - President and Chief Executive Officer

James Sullivan - Executive Vice President and Chief Operating Officer

Michael Zugay - Chief Financial Officer

Jimmi Sue Smith - Vice President, Finance and Treasurer

This event is open to investors and analysts attending either in person or virtually, and will include a question-and-answer session following the prepared remarks.

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:

Michael J. Zugay

Tel: 412 227 2231

Email: ZugayMJ@koppers.com

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