Alliance Resource Partners, L.P. is a diversified energy company and Master Limited Partnership that produces and markets coal primarily to utilities and industrial users in domestic and international markets. As the second largest coal producer in the eastern United States, it operates seven underground mining complexes in key regions such as the Illinois Basin and Appalachia, delivering a range of thermal and metallurgical coal products with varying heat and sulfur contents to meet diverse customer specifications for electric power generation, industrial use, and steelmaking. The company also maintains a growing portfolio of mineral and royalty interests in strategic oil and gas producing basins like the Permian, Anadarko, and Williston, generating income from leasing to major operators and development activities. Additionally, it earns coal royalties from reserves leased to its mining operations and pursues other growth investments in energy-related infrastructure and technology. Founded in 1971 and headquartered in Tulsa, Oklahoma, Alliance Resource Partners, L.P. plays a vital role in providing reliable, affordable baseload energy solutions.