PITTSBURGH, PA - Koppers Holdings Inc. intends to release its first quarter 2011 financial results before the opening of the markets on Thursday, May 5, 2011, and discuss its results on a conference call later that day at 11:00 a.m. EDT.

Interested parties may access the live audio broadcast by dialing (877) 941 2333 in the United States/Canada, or +1 (480) 629 9724 for international, Conference ID number 4430987. Investors are requested to access the call at least five minutes before the scheduled start time in order to complete a brief registration. An audio replay will be available approximately two hours after the completion of the call at (800) 406 7325 or +1 (303) 590 3030, Conference ID number 4430987. The recording will be available for replay through May 19, 2011.

The live broadcast of the Koppers conference call will be available online.

About Koppers

Koppers, with corporate headquarters and a research center in Pittsburgh, Pennsylvania, is a global integrated producer of carbon compounds and treated wood products. Including its joint ventures, Koppers operates facilities in the United States, United Kingdom, Denmark, the Netherlands, Australia and China. The stock of Koppers Holdings Inc. is publicly traded on the New York Stock Exchange under the symbol "KOP."

SOURCE: Koppers Holdings Inc.

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