GPK 10-K Fiscal year ended Dec. 31, 2019

Molly P. Zhang (aka Peifang Zhang) served as Vice President of Asset Management and Global Manufacturing Executive for Mining Systems etc. at Orica Limited, a global mining services company, from 2011 to 2016. Prior to Orica, Ms. Zhang held various senior leadership positions at Dow Inc. including Managing Director, SCG-Dow Group and Global Business Vice President for Dow’s Technology Licensing and Catalyst business as well as Manufacturing Director for Dow Asia Pacific. Current Public Company Directorships (other than the Company) : Gates Industrial Corporation plc (since July 2020) and Aqua Metals, Inc. (since March 2021). Public Company Directorships in Past Five Years: GEA Group AG (from April 2016 to December 2021), Cooper-Standard Holdings, Inc. (from May 2017 to May 2020) and Newmont Mining Corporation (from July 2017 to June 2019). Ms. Zhang contributes to the mix of experience and qualifications the Board seeks to maintain, primarily through her international leadership experience in the areas of global operations, business, and technology, as well as her considerable board experience and extensive knowledge of the mining and industrial sectors. Additionally, she was based in various Asian countries for over a decade and has extensive expertise in driving business growth in the region. Ms. Zhang holds a master’s degree in Chemistry and a PhD in Chemical Engineering from the Technical University of Clausthal, Germany.

Richard A. Navarre served as Chief Executive Officer and President of Covia Corporation, a privately held company, from May 2019 to May 2021. He served as President and Chief Commercial Officer of Peabody Energy Corporation from 2008 until 2012 and as Peabody’s Chief Financial Officer and Executive Vice President of Corporate Development from 1999 to 2008. Prior to joining Peabody in 1993, Mr. Navarre was a senior manager with KPMG, LLP. Current Public Company Directorships (other than the Company): Civeo Corporation (since June 2014), and Natural Resource Partners L.P. (since October 2013). Public Company Directorships in Past Five Years (including companies that are no longer publicly listed) : Covia Corporation (June 2018 to May 2021). Mr. Navarre contributes to the mix of experience and qualifications the Board seeks to maintain, primarily through his leadership, operations, strategic planning,

Paul A. Lang has served as our Chief Executive Officer since April 2020 and also served as our President from April 2015 to February 2024. Prior to that, he served as our Executive Vice President and Chief Operating Officer from April 2012 to April 2015 and as our Executive Vice President-Operations from August 2011 to April 2012. Since joining the Company in 1984, he has also held a variety of engineering and operating positions at both the Company’s eastern and western operations, and served on the Company’s Board from 2014 through 2016. Mr. Lang is a member of the executive committee of the National Mining Association and a member of the Board of Trustees at the Missouri University of Science and Technology. He also has experience serving on the boards of directors of private companies, including Knight Hawk Holdings, LLC. Current Public Company Directorships (other than the Company): None. Public Company Directorships in Past Five Years: None. Mr. Lang contributes to the mix of experience and qualifications the Board seeks to maintain, primarily through his position as Chief Executive Officer and his prior senior positions with the Company. With almost 40 years of experience with the Company, Mr. Lang has intimate knowledge of all aspects of the Company’s operations and marketing, as well as an extensive understanding of the mining industry.

Patrick A. Kriegshauser serves as Executive Vice President and a director of ArchKey Holdings, Inc., a privately held company, having previously served as its Executive Vice President and Chief Financial Officer from July 2017 until July 2023. Mr. Kriegshauser has also served as Executive Vice President, Chief Financial Officer and principal owner of Sachs Electric Company, which is owned by ArchKey Holdings, Inc. From 1985 to 2000, Mr. Kriegshauser served in various senior level capacities at the Company, including serving as our Senior Vice President and Chief Financial Officer from 1996 to 2000. He started his career at PricewaterhouseCoopers LLP in 1981. Current Public Company Directorships (other than the Company): None. Public Company Directorships in Past Five Years: None. Mr. Kriegshauser contributes to the mix of experience and qualifications the Board seeks to maintain, primarily through his finance and accounting, senior management and board leadership experience, as well as his substantial knowledge of the coal and energy industries. Mr. Kriegshauser has extensive senior management experience, particularly in the finance and accounting area, having served as Chief Financial Officer of ArchKey Holdings, Inc., Sachs Electric and

Holly Keller Koeppel served as Managing Partner and head of Gateway Infrastructure Investments L.P. from March 2015 to January 2017. From 2010 to February 2015, she was Partner and Global Co-Head of Citi Infrastructure Investors, a division of Citigroup, Inc. Ms. Koeppel served as Executive Vice President and Chief Financial Officer of American Electric Power Corporation (“AEP”) from 2006 to 2009 and several additional executive positions at AEP from 2000 to 2006. Current Public Company Directorships (other than the Company): AES Corporation (since April 2015), British American Tobacco plc (since July 2017) and Flutter Entertainment plc (since May 2021). Public Company Directorships in Past Five Years : Vesuvius plc (April 2017 to May 2021). Ms. Koeppel contributes to the mix of experience and qualifications the Board seeks to maintain, primarily through her finance and accounting, senior management and board leadership experience, as well as her substantial knowledge of the energy industry. Ms. Koeppel’s service as Executive Vice President and Chief Financial Officer of AEP and her other public company board experience provide valuable insight and perspective to the Board.

Pamela R. Butcher served as Chief Executive Officer, President and Chief Operating Officer of Pilot Chemical Corp., a global specialty chemical company, from January 2010 until her retirement in January 2021. Ms. Butcher has served as a member of the Board of Directors of Pilot since 2016, and currently serves as a Special Advisor to the Chairman. Prior to joining Pilot, Ms. Butcher held a number of senior leadership positions at the Dow Chemical Company (now Dow Inc.), including Vice President and General Manager of Adhesives and Sealants and Vice President Corporate Marketing & Sales, and she also previously served as President of Hampshire Chemical Company.