BHP Group Limited operates as a resources company in Australia, Europe, China, Japan, India, South Korea, the rest of Asia, North America, South America, and internationally. The company operates through Copper, Iron Ore, and Coal segments. It engages in the mining of copper, uranium, gold, zinc, lead, molybdenum, silver, iron ore, cobalt, and metallurgical and energy coal. The company is also involved in the mining, smelting, and refining of nickel, as well as potash development activities. In addition, it provides towing, freight, marketing and trading, marketing support, finance, administrative, and other services. The company was founded in 1851 and is headquartered in Melbourne, Australia.

Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. The company operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. It engages in the rate-regulated electric generation, transmission, and distribution activities; and rate-regulated natural gas distribution business. In addition, the company generates electricity through coal, nuclear, and natural gas, as well as renewable sources, such as hydroelectric, wind, methane gas, and solar. It serves residential, commercial, and industrial customers. The company was founded in 1881 and is headquartered in Saint Louis, Missouri.

Evergy, Inc., together with its subsidiaries, engages in the generation, transmission, distribution, and sale of electricity in the United States. The company generates electricity through coal, landfill gas, uranium, and natural gas and oil sources, as well as solar, wind, other renewable sources. It serves residences, commercial firms, industrials, municipalities, and other electric utilities. The company was incorporated in 2017 and is headquartered in Kansas City, Missouri.

Alliance Resource Partners, L.P., a diversified natural resource company, produces and markets coal primarily to utilities and industrial users in the United States. The company operates through four segments: Illinois Basin Coal Operations, Appalachia Coal Operations, Oil & Gas Royalties, and Coal Royalties. It produces a range of thermal and metallurgical coal with sulfur and heat contents. The company operates seven underground mining complexes in Illinois, Indiana, Kentucky, Maryland, Pennsylvania, and West Virginia. In addition, it owns and leases oil and gas mineral interests and equity interests; and leases its coal mineral reserves and resources to its mining complexes; and leases land and operates a coal loading terminal on the Ohio River at Mt. Vernon, Indiana. Further, the company offers various mining technology products and services, including data network, communication and tracking systems, mining proximity detection systems, industrial collision avoidance systems, and data and analytics software. It also exports its products. The company was founded in 1971 and is headquartered in Tulsa, Oklahoma.

CONSOL Energy Inc., together with its subsidiaries, produces and sells bituminous coal in the United States and internationally. It operates through two segments, Pennsylvania Mining Complex (PAMC) and CONSOL Marine Terminal. The company's PAMC segment engages in the mining, preparing, and marketing of bituminous coal to power generators, industrial end-users, and metallurgical end-users. This segment includes the Bailey Mine, the Enlow Fork Mine, the Harvey Mine, and the central preparation plant. Its CONSOL Marine Terminal segment provides coal export terminal services through the Port of Baltimore. The company also develops and operates the Itmann Mining Complex located in Wyoming County, West Virginia; and Greenfield Reserves and Resources located in the Northern Appalachian, Central Appalachian, and Illinois basins. CONSOL Energy Inc. was founded in 1864 and is headquartered in Canonsburg, Pennsylvania.

Arch Resources, Inc. engages in the production and sale of metallurgical products. It operates in two segments, Metallurgical and Thermal. The company operates active mines. It owned or controlled primarily through long-term leases of coal land in Ohio, Maryland, Virginia, West Virginia, Wyoming, Kentucky, Montana, Pennsylvania, Colorado, and Illinois; and smaller parcels of property in Alabama, Indiana, Washington, Arkansas, California, Utah, and Texas. The company sells its products to utility, industrial, and steel producers in the United States and internationally. Arch Resources, Inc. was incorporated in 1969 and is headquartered in Saint Louis, Missouri.

SunCoke Energy, Inc. operates as an independent producer of coke in the Americas and Brazil. The company operates through three segments: Domestic Coke, Brazil Coke, and Logistics. It offers metallurgical and thermal coal. The company also provides handling and/or mixing services to steel, coke, electric utility, coal producing, and other manufacturing based customers. In addition, it owns and operates cokemaking facilities in the United States and Brazil. The company was founded in 1960 and is headquartered in Lisle, Illinois.

Hallador Energy Company, through its subsidiaries, engages in the production of steam coal in the State of Indiana for the electric power generation industry. The company owns the Oaktown Mine 1 and Oaktown Mine 2 underground mines in Oaktown; Freelandville Center Pit surface mine in Freelandville; and Prosperity Surface mine in Petersburg, Indiana. It is also involved in gas exploration activities in Indiana; and operation of logistics transport facility. Hallador Energy Company was founded in 1949 and is headquartered in Terre Haute, Indiana.