EOG Resources, Inc., together with its subsidiaries, explores for, develops, produces, and markets crude oil, natural gas liquids, and natural gas primarily in producing basins in the United States, the Republic of Trinidad and Tobago and internationally. The company was formerly known as Enron Oil & Gas Company. EOG Resources, Inc. was incorporated in 1985 and is headquartered in Houston, Texas.

Petróleo Brasileiro S.A. - Petrobras explores, produces, and sells oil and gas in Brazil and internationally. The company operates through three segments: Exploration and Production; Refining, Transportation and Marketing; and Gas and Power. The Exploration and Production segment explores, develops, and produces crude oil, natural gas liquids, and natural gas primarily for supplies to the domestic refineries. The Refining, Transportation and Marketing segment engages in the refining, logistics, transport, acquisition, and exports of crude oil; and production of fertilizers, as well as holding interests in petrochemical companies. The Gas and Power segment is involved in the logistic and trading of natural gas and electricity; transportation and trading of LNG; generation of electricity through thermoelectric power plants; renewable energy businesses; low carbon services; and natural gas processing business, as well as production of biodiesel and its co-products. The company also engages in prospecting, drilling, refining, processing, trading, and transporting crude oil from producing onshore and offshore oil fields, and shale or other rocks, as well as oil products, natural gas, and other liquid hydrocarbons. In addition, it engages in research, development, production, transport, distribution, and trading of energy. Petróleo Brasileiro S.A. - Petrobras was incorporated in 1953 and is headquartered in Rio de Janeiro, Brazil.

Ecopetrol S.A. operates as an integrated energy company. The company operates through four segments: Exploration and Production; Transport and Logistics; Refining, Petrochemical and Biofuels; and Electric Power Transmission and Toll Roads Concessions. It engages in the exploration and production of oil and gas; transportation of crude oil, motor fuels, fuel oil, and other refined products, including diesel, jet, and biofuels; processing and refining crude oil; distribution of natural gas and LPG; sale of refined and petrochemical products; supplying of electric power transmission services; design, development, construction, operation, and maintenance of road and energy infrastructure projects; and supplying of information technology and telecommunications services. As of December 31, 2022, the company had approximately 9,127 kilometers of crude oil and multi-purpose pipelines. It also produces and commercializes polypropylene resins and compounds, and masterbatches; and offers industrial service sales to customers and specialized management services. It has operations in Colombia, the United States, Asia, Central America and the Caribbean, Europe, and South America. The company was formerly known as Empresa Colombiana de Petróleos and changed its name to Ecopetrol S.A. in June 2003. Ecopetrol S.A. was incorporated in 1948 and is headquartered in Bogotá, Colombia.

Vista Energy, S.A.B. de C.V., through its subsidiaries, engages in the exploration and production of oil and gas in Latin America. The company's principal assets located in Neuquina basin, Argentina and Vaca Muerta. It owns producing assets in Argentina and Mexico. In addition, the company involved in drilling and workover activities located in Argentina. The company was formerly known as Vista Oil & Gas, S.A.B. de C.V. and changed its name to Vista Energy, S.A.B. de C.V. in April 2022. Vista Energy, S.A.B. de C.V. was incorporated in 2017 and is based in Mexico City, Mexico.

TXO Partners, L.P., an oil and natural gas company, focuses on the acquisition, development, optimization, and exploitation of conventional oil, natural gas, and natural gas liquid reserves in North America. Its acreage positions are concentrated in the Permian Basin of West Texas and New Mexico and the San Juan Basin of New Mexico and Colorado. The company was formerly known as TXO Energy Partners, L.P. and changed its name to TXO Partners, L.P. in May 2023. TXO Partners, L.P. was incorporated in 2012 and is based in Fort Worth, Texas.

Gran Tierra Energy Inc., together with its subsidiaries, engages in the exploration and production of oil and gas properties in Colombia and Ecuador. The company was founded in 2003 and is headquartered in Calgary, Canada.

Houston American Energy Corp., an independent oil and gas company, engages in the acquisition, exploration, exploitation, development, and production of natural gas, crude oil, and condensate. Its principal properties are located primarily in the Texas Permian Basin, the South American country of Colombia, and the onshore Louisiana Gulf Coast region. The company is based in Houston, Texas.

Empire Petroleum Corporation engages in the acquisition, exploration, and development of oil and gas interests in Louisiana, New Mexico, Montana, North Dakota, and Texas. The company was formerly known as Americomm Resources Corporation and changed its name to Empire Petroleum Corporation in August 2001. Empire Petroleum Corporation was incorporated in 1983 and is headquartered in Tulsa, Oklahoma.