UNITED STATES LIME & MINERALS Business Summary

United States Lime & Minerals Inc. (USLM) operates a vertically integrated business model centered on the extraction, processing, and distribution of high-purity limestone. The company generates revenue primarily through its Lime and Limestone Operations segment, which manufactures quicklime, hydrated lime, and lime slurry for diverse end-markets including construction, steel manufacturing, environmental water treatment, and flue gas desulfurization. A secondary, non-core revenue stream is derived from its Natural Gas Interests segment, consisting of royalty interests in the Barnett Shale. USLM maintains a dominant regional presence in the South-Central United States, positioning itself as a high-margin specialist compared to broader diversified peers like Martin Marietta Materials (MLM), Eagle Materials (EXP), and Arcosa (ACA). As of early 2026, the company distinguishes itself through exceptional financial liquidity, reporting a current ratio exceeding 19.0 and a debt-free balance sheet that facilitates aggressive capital reinvestment and consistent dividend payouts. The leadership team is anchored by President and CEO Timothy W. Byrne, a CPA and former President of the National Lime Association who has served in executive roles at USLM for over 30 years. He is supported by Vice President and CFO Michael L. Wiedemer, a seasoned financial strategist with extensive experience in corporate controllership within the industrial sector. Other key executives include Nathan M. O’Neill (VP of Production), Timothy Wade Stone (VP of Sales & Marketing), and M. Michael Owens (Secretary & Treasurer). The company’s strategic direction is heavily influenced by the Doumet family; Antoine M. Doumet serves as the Independent Chairman of the Board, while his brother George M. Doumet controls Inberdon Enterprises Ltd., the company’s majority shareholder. This stable, long-tenured governance structure provides a conservative yet highly efficient operational framework that has historically prioritized long-term shareholder value over short-term market volatility.