PITTSBURGH, July 25, 2025 /PRNewswire/ -- Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds, today announced that the company plans to release its financial results for the second quarter 2025 before the market opens on Friday, August 8, 2025, and discuss its outlook on a conference call later that day at 11:00 a.m. Eastern Time.  Presentation materials will be available at least 15 minutes before the call on www.koppers ...