Koppers Holdings Inc. 10-K

ITEM 2. PROPERTIES The following chart sets forth information regarding our production facilities as of February 26, 2026. Generally, our production and port facilities are suitable and adequate for the purposes for which they are intended and overall have sufficient capacity to conduct business in the upcoming year. Primary Product Line Location Description of Property Interest Railroad and Utility Products and Services Rail joint bars Huntington, West Virginia Leased Railroad crosstie materials recovery Domino, Texas Leased Railroad crossties Ashcroft, British Columbia, Canada Owned Railroad crossties Camden, Arkansas Owned/Leased Railroad crossties Florence, South Carolina Owned Railroad crossties Galesburg, Illinois Leased Railroad crossties Guthrie, Kentucky Owned Railroad crossties Muncy, Pennsylvania Owned Railroad crossties North Little Rock, Arkansas Owned Railroad crossties Roanoke, Virginia Owned Railroad crossties Williamsville, Missouri Owned Railroad crossties and utility poles Somerville, Texas Owned Utility poles Bunbury, Western Australia, Australia Owned/Leased Utility poles Eutawville, South Carolina Owned Utility poles Grafton, New South Wales, Australia Owned Utility poles Kennedy, Alabama Owned Utility poles Leesville, Louisiana Owned Utility poles Leland, North Carolina Owned Utility poles Longford, Tasmania, Australia Owned Utility poles Mathiston, Mississippi Owned Utility poles Newsoms, Virginia Owned Utility poles North, South Carolina Owned Utility poles Takura, Queensland, Australia Leased Utility poles Vidalia, Georgia Owned Performance Chemicals Intermediate copper products Hubbell, Michigan Leased Wood preservation chemicals Auckland, New Zealand Owned Wood preservation chemicals Darlington, United Kingdom Owned Wood preservation chemicals Geelong, Victoria, Australia Owned Wood preservation chemicals Millington, Tennessee Owned Wood preservation chemicals Mt. Gambier, South Australia, Australia Owned Wood preservation chemicals Rock Hill, South Carolina Owned Carbon Materials and Chemicals Carbon products Mayfield, New South Wales, Australia Owned Carbon products Nyborg, Denmark Owned/Leased Carbon products Stickney, Illinois Owned Our corporate offices are located in leased office space in Pittsburgh, Pennsylvania. The lease term expires on December 31, 2028. We also lease office space in Peachtree City, Georgia. 25 TABLE OF CONTENTS Koppers Holdings Inc. 2025 Annual Report