Koppers Holdings Inc. Schedules First Quarter 2024 Conference Call PR Newswire PITTSBURGH, April 19, 2024 PITTSBURGH , April 19, 2024 /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 first quarter of 2024 before the market opens on Friday, May 3, 2024 , and discuss its outlook on a conference call later that day...