Koppers Holdings Inc. announced that its Board of Directors has approved a 17% increase in the planned quarterly dividend rate for 2024, from $0.06 to $0.07 per share of common stock. A quarterly dividend will be paid on March 25, 2024, to shareholders of record as of the close of trading on March 8, 2024. At this quarterly dividend rate, subject to the standard quarterly review by the Board of Directors, the annual dividend rate for 2024 increases to $0.28 per share.