 PITTSBURGH, Oct. 21, 2021 PRNewswire -- Koppers Holdings Inc. NYSE: KOP, an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds, today announced that it plans to release its financial results for the third quarter of 2021 before the market opens on Thursday, November 4, 2021, and discuss its outlook on a conference call later that day at 11:00 a.m. Eastern Time. 