Koppers Holdings Inc. / Dividends

Declaration date	Ex date	Record date	Payment date	Amount
August 29, 2025	August 28, 2025	August 29, 2025	September 15, 2025	$0.08
May 30, 2025	May 29, 2025	May 30, 2025	June 17, 2025	$0.08
March 7, 2025	March 6, 2025	March 7, 2025	March 24, 2025	$0.08
November 29, 2024	November 28, 2024	November 29, 2024	December 16, 2024	$0.07
August 30, 2024	August 29, 2024	August 30, 2024	September 16, 2024	$0.07
May 23, 2024	May 23, 2024	May 24, 2024	June 10, 2024	$0.07
March 7, 2024	March 7, 2024	March 8, 2024	March 25, 2024	$0.07
November 22, 2023	November 23, 2023	November 24, 2023	December 11, 2023	$0.06
August 24, 2023	August 24, 2023	August 25, 2023	September 11, 2023	$0.06
May 25, 2023	May 25, 2023	May 26, 2023	June 12, 2023	$0.06
March 9, 2023	March 9, 2023	March 10, 2023	March 27, 2023	$0.06
November 23, 2022	November 24, 2022	November 25, 2022	December 12, 2022	$0.05
August 25, 2022	August 25, 2022	August 26, 2022	September 12, 2022	$0.05
May 26, 2022	May 26, 2022	May 27, 2022	June 13, 2022	$0.05
March 17, 2022	March 17, 2022	March 18, 2022	April 4, 2022	$0.05
November 13, 2014	November 14, 2014	November 17, 2014	January 5, 2015	$0.25
August 14, 2014	August 15, 2014	August 18, 2014	October 6, 2014	$0.25
May 15, 2014	May 16, 2014	May 19, 2014	July 7, 2014	$0.25
February 13, 2014	February 17, 2014	February 18, 2014	April 7, 2014	$0.25
November 14, 2013	November 15, 2013	November 18, 2013	January 6, 2014	$0.25
August 15, 2013	August 16, 2013	August 19, 2013	October 7, 2013	$0.25
May 9, 2013	May 10, 2013	May 13, 2013	July 8, 2013	$0.25
February 14, 2013	February 18, 2013	February 19, 2013	April 8, 2013	$0.25
November 15, 2012	November 16, 2012	November 19, 2012	January 7, 2013	$0.24
August 16, 2012	August 17, 2012	August 20, 2012	October 9, 2012	$0.24
May 11, 2012	May 14, 2012	May 15, 2012	July 9, 2012	$0.24
February 24, 2012	February 27, 2012	February 28, 2012	April 9, 2012	$0.24
November 9, 2011	November 11, 2011	November 14, 2011	January 6, 2012	$0.22
August 11, 2011	August 12, 2011	August 15, 2011	October 7, 2011	$0.22
May 12, 2011	May 13, 2011	May 16, 2011	July 6, 2011	$0.22
February 10, 2011	February 11, 2011	February 14, 2011	April 8, 2011	$0.22
November 10, 2010	November 12, 2010	November 15, 2010	January 7, 2011	$0.22
August 12, 2010	August 13, 2010	August 16, 2010	October 4, 2010	$0.22
May 13, 2010	May 14, 2010	May 17, 2010	July 6, 2010	$0.22
February 11, 2010	February 15, 2010	February 16, 2010	April 5, 2010	$0.22
November 12, 2009	November 13, 2009	November 16, 2009	January 8, 2010	$0.22
August 13, 2009	August 14, 2009	August 17, 2009	October 5, 2009	$0.22
May 14, 2009	May 15, 2009	May 18, 2009	July 6, 2009	$0.22
February 12, 2009	February 16, 2009	February 17, 2009	April 1, 2009	$0.22
November 13, 2008	November 14, 2008	November 17, 2008	January 5, 2009	$0.22
August 14, 2008	August 15, 2008	August 18, 2008	October 2, 2008	$0.22
May 15, 2008	May 16, 2008	May 19, 2008	July 1, 2008	$0.22
February 13, 2008	February 15, 2008	February 18, 2008	April 2, 2008	$0.22
November 15, 2007	November 16, 2007	November 19, 2007	January 2, 2008	$0.17
August 16, 2007	August 17, 2007	August 20, 2007	October 1, 2007	$0.17
May 10, 2007	May 11, 2007	May 14, 2007	July 2, 2007	$0.17
February 26, 2007	February 27, 2007	February 28, 2007	April 2, 2007	$0.17
November 28, 2006	November 29, 2006	November 30, 2006	January 2, 2007	$0.17
August 30, 2006	August 31, 2006	September 1, 2006	October 2, 2006	$0.17
May 26, 2006	May 30, 2006	May 31, 2006	July 5, 2006	$0.17
March 29, 2006	March 30, 2006	March 31, 2006	April 17, 2006	$0.10