Koppers Inc., a wholly-owned subsidiary of Koppers Holdings Inc. (NYSE: KOP), announced today the pricing of its $500 million aggregate principal amount of 6.00% Senior Notes due 2025 (the "Notes") at an issue price of 100% of principal amount. The size of the offering was increased by $100 million from the previously announced offering size of $400 million. The Notes will pay interest semi-annually in arrears on February 15 and August 15 beginning on August 15, 2017 and will mature on February 15, 2025 unless earlier redeemed or repurchased. The Notes will be guaranteed by Koppers Holdings Inc. and certain of Koppers Inc.'s domestic subsidiaries. The net proceeds of this offering are intended to be used to repurchase any and all of Koppers Inc.'s outstanding $300 million Senior Notes due 2019 (the "2019 Notes") and to pay related fees and expenses in connection with its previously announced tender offer and consent solicitation, to redeem any of the 2019 Notes that remain outstanding if Koppers Inc. purchases less than all of the outstanding 2019 Notes in the tender offer and consent solicitation, and to repay outstanding debt under Koppers Inc.'s existing senior secured credit facilities. The sale of the Notes to the initial purchasers is expected to settle on January 25, 2017.

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. Including our joint ventures, we serve our customers through a comprehensive global manufacturing and distribution network, with facilities located in North America, South America, Australasia, China and Europe. The stock of Koppers Holdings Inc. is publicly traded on the New York Stock Exchange under the symbol "KOP." For more information, visit us on the Web: www.koppers.com. Questions concerning investor relations should be directed to Michael J. Zugay at 412 227 2231 or Quynh McGuire at 412 227 2049.