Koppers to Ring NYSE Closing Bell to Celebrate 20th Anniversary of Listing; Management Hosting Meetings with the Financial Community in New York

Koppers to Ring NYSE Closing Bell to Celebrate 20th Anniversary of Listing; Management Hosting Meetings with the Financial Community in New York Accessibility StatementSkip Navigation PITTSBURGH, March 30, 2026 /PRNewswire/ -- Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals and carbon compounds, will mark the 20th anniversary of its New York Stock Exchange (NYSE) listing by ringing the NYSE Closing Bell at 4:00 PM Eastern Time today, Ma ...