Ash Grove Cement is a pioneer in the US cement industry. It's the largest American-owned cement producer and the nation's sixth-largest cement maker, producing portland and masonry cements used in roads, bridges, buildings, and other structures. It operates eight US cement plants that boast an annual capacity of more than 8 million tons. Sister firm Ash Grove Packaging offers packaged construction materials, including sealers and additives, caulks, and stucco. Other Ash Grove affiliates include Ash Grove Aggregates, Holliday Sand & Gravel, Kansas City Ready Mix Group, Permanent Paving, and quarry operators Conco Companies and Lyman-Richey Corporation. It's owned and run by the heirs of Lester T. Sunderland.