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Rio Tinto Group engages in exploring, mining, and processing mineral resources worldwide. The company operates through Iron Ore, Aluminium, Copper, and Minerals Segments. The Iron Ore segment engages in the iron ore mining, and salt and gypsum production in Western Australia. The Aluminum segment is involved in bauxite mining; alumina refining; and aluminium smelting. The Copper segment engages in mining and refining of copper, gold, silver, molybdenum, and other by-products and exploration activities. The Minerals segment is involved in mining and processing of borates, titanium dioxide feedstock, and iron concentrate and pellets; diamond mining, sorting, and marketing; and development projects for battery materials, such as lithium. It also owns and operates open pit and underground mines; and refineries, smelters, processing plants and power, and shipping facilities. Rio Tinto Group was founded in 1873 and is headquartered in London, the United Kingdom.

Standard Lithium Ltd. explores for, develops, and processes lithium brine properties in the United States. Its flagship project is the Lanxess project where it operates approximately 150,000 acres of brine leases located in south-western Arkansas. The company was formerly known as Patriot Petroleum Corp. and changed its name to Standard Lithium Ltd. in December 2016. Standard Lithium Ltd. was incorporated in 1998 and is headquartered in Vancouver, Canada.

Savanna Energy Services Corp (Savanna) is a Canada-based drilling, well servicing and oilfield rentals company. It operates through three segments: corporate, services and drilling. The corporate segment provides management and administrative services to its subsidiaries and their respective operations. The services segment provides well servicing services and rental equipment to the oil and gas industry. The drilling segment provides contract drilling services to the oil and gas industry. Its business is conducted through two divisions: contract drilling and oilfield services. Its drilling services include Hybrid, Top Drive Single, Telescopic Double and Velox Triple. Its oilfield services include Well Servicing, Oilfield Rentals and Savanna Trucking Services. Savanna Well Servicing provides service in oil and gas exploration and well preparation and well maintenance across Alberta, Saskatchewan, British Columbia and Manitoba. It operates in Canada, the United States and Australia.

Ur-Energy Inc. engages in the acquisition, exploration, development, and operation of uranium mineral properties. The company holds interests in 12 projects located in the United States. Its flagship property is the Lost Creek project comprising a total of approximately 1,800 unpatented mining claims and three Wyoming mineral leases covering an area of approximately 35,400 acres located in the Great Divide Basin, Wyoming. The company was incorporated in 2004 and is headquartered in Littleton, Colorado.