Koppers Signs Agreement to Acquire Brown Wood Preserving PR Newswire PITTSBURGH, Feb. 28, 2024 Represents Growth, Market Expansion and Scale in Utility Pole Business PITTSBURGH , Feb. 28, 2024 /PRNewswire/ -- Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds, today announced that Koppers Utility and Industrial Products Inc. (UIP), a wholly owned subsidiary of Koppers Holdings, signed an agreement to acquire...