Koppers reports record Q1 sales $513M, EPS $1.19; reaffirms FY23 guidance

Koppers Reports First Quarter 2023 Results; Reaffirms 2023 Outlook Record First Quarter Sales of $513.4 Million vs. $459.3 Million in Prior Year Quarter Record First Quarter Diluted EPS of $1.19 vs. $0.87 in Prior Year Quarter Adjusted EPS of $1.12 vs. $0.91 in Prior Year Quarter PITTSBURGH, May 5, 2023 – Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds, today reported net income attributable to Koppers for the first quarter of 2023 of $25.5 million, or a first-quarter record of $1.19 per diluted share, compared to $18.8 million, or $0.87 per diluted share, in the prior year quarter.

Advisory Resolution to Approve Named Executive Officer Compensation : The advisory resolution approving the compensation of the named executive officers of the Company as disclosed in the Notice of Annual Meeting and Proxy Statement for the 2023 Annual Meeting was approved. The final voting results are as follows: For Against Abstain Broker Non-Votes 17,672,131 368,611 24,659 1,213,990

Election of Directors : Nominations of Leroy M. Ball, Xudong Feng, Ph.D., Traci L. Jensen, David L. Motley, Albert J. Neupaver, Andrew D. Sandifer, Louis L. Testoni, Stephen R. Tritch and Sonja M. Wilkerson to serve as directors for one-year terms expiring in 2024 were considered, and all nominees were elected. All nominees received a majority of votes cast. The final voting results are as follows: Nominees For Against Abstain Broker Non-Votes Leroy M. Ball 17,790,675 272,834 1,892 1,213,990 Xudong Feng, Ph.D. 17,536,299 525,589 3,513 1,213,990 Traci L. Jensen 17,912,767 143,729 8,905 1,213,990 David L. Motley 17,768,491 287,335 9,575 1,213,990 Albert J. Neupaver 17,594,054 468,358 2,989 1,213,990 Andrew D. Sandifer 17,967,381 88,640 9,380 1,213,990 Louis L. Testoni 17,682,067 380,242 3,092 1,213,990 Stephen R. Tritch 17,724,975 337,418 3,008 1,213,990 Sonja M. Wilkerson 17,759,787 296,746 8,868 1,213,990

Advisory Resolution to Approve the Frequency of Future Advisory Votes on Named Executive Officer Compensation : On the advisory resolution to approve the frequency of future advisory votes on named executive officer compensation, the Company’s shareholders recommend that such votes be held annually as follows: For 1 Year For 2 Years For 3 Years Abstain Broker Non-Votes 17,034,489 4,649 981,000 45,263 1,213,990

Ratification of Appointment of KPMG LLP : The Audit Committee of the Company’s Board of Directors appointed KPMG LLP as our independent registered public accounting firm for the year 2023. The final voting results to ratify the appointment of KPMG LLP are as follows: For Against Abstain 19,055,764 168,522 55,105 There were no broker non-votes with respect to this matter.