Parex Resources Inc. engages in the exploration, development, production, and marketing of oil and natural gas in Colombia. The company holds interests in onshore exploration and production blocks totaling approximately 2,323,941 gross acres. As of December 31, 2020, it had proved plus probable reserves of 194,491 million barrels of oil equivalent. The company was incorporated in 2009 and is headquartered in Calgary, Canada.

Cameco Corporation produces and sells uranium. It operates in two segments, Uranium and Fuel Services. The Uranium segment is involved in the exploration for, mining, and milling, as well as purchase and sale of uranium concentrate. The Fuel Services segment engages in the refining, conversion, and fabrication of uranium concentrate, as well as the purchase and sale of conversion services. This segment also produces fuel bundles or reactor components for CANDU reactors. The company sells its uranium and fuel services to nuclear utilities in the Americas, Europe, and Asia. Cameco Corporation was incorporated in 1987 and is headquartered in Saskatoon, Canada.

Enerflex Ltd. supplies natural gas compression, oil and gas processing, refrigeration systems, energy transition solutions, and electric power generation equipment to the oil and natural gas industry. The company provides custom and standard compression packages for reciprocating and screw compressor applications; and designs, engineers, manufactures, constructs, and installs modular natural gas processing equipment, refrigeration systems, and electric power solutions, as well as engages in re-engineering, re-configuration, and re-packaging of compressors for various field applications; and modular processing equipment and waste gas systems for natural gas facilities. It also offers after-market services, parts distribution, operations and maintenance solutions, equipment optimization and maintenance programs, manufacturer warranties, exchange components, long-term service agreements, and technical services. In addition, the company rents natural gas compressors totaling approximately 800,000 horsepower. It serves small to large independent producers, integrated oil and natural gas companies, midstream and petrochemical companies, power generation companies, users of natural gas-fired electric power, and carbon capture players in Canada, the United States, Argentina, Bolivia, Brazil, Colombia, Mexico, the United Kingdom, Bahrain Kuwait, Oman, the United Arab Emirates, Australia, New Zealand, Indonesia, Malaysia, and Thailand. Enerflex Ltd. was founded in 1980 and is headquartered in Calgary, Canada.

ARC Resources Ltd. explores, develops, and produces crude oil, natural gas, and natural gas liquids in Canada. The company holds interests in the Montney properties located in northeast British Columbia and northern Alberta; and Pembina Cardium properties in central Alberta. As of December 31, 2020, it had proved plus probable reserves of 929 millions of barrels of oil equivalent. ARC Resources Ltd. was founded in 1996 and is headquartered in Calgary, Canada.

Northland Power Inc., an independent power producer, develops, builds, owns, and operates clean and green power projects in North America, Europe, Latin America, and Asia. The company produces electricity from renewable resources, such as wind, solar, or hydro power, as well as clean burning natural gas and biomass for sale under power purchase agreements and other revenue arrangements. As of December 31, 2020, it owned or had economic interest in 2,681 megawatts (MW) of operating generating capacity and 130 MW of generating capacity under construction. The company was founded in 1987 and is headquartered in Toronto, Canada.

Santos Limited explores for, develops, produces, transports, and markets hydrocarbons for homes and businesses in Australia and the Asia Pacific. Its five principal assets are located in the Cooper Basin, Queensland and NSW, Papua New Guinea, Northern Australia and Timor-Leste, and Western Australia. The company also holds an asset in Alaska; and engages in the development of carbon capture and storage technologies. In addition, it produces natural gas, liquefied petroleum gas, ethane, methane, coal seam gas, liquefied natural gas, shale gas, and condensate, as well as oil. The company's proved plus probable reserves include 1676 million barrels of oil equivalent. Santos Limited was incorporated in 1954 and is headquartered in Adelaide, Australia.

Polaris Infrastructure Inc. acquires, develops, and operates renewable energy projects in Latin America. The company, through its subsidiaries, owns and operates the San Jacinto project, a 72 megawatt (MW) net capacity geothermal facility located in northwest Nicaragua. It also operates run-of-river (ROR) hydro facility of 5 MW in Canchayllo, Peru; and 2 ROR hydro projects with the capacity of approximately 8 MW (net) and 20 MW (net) in Peru. The company was formerly known as Ram Power, Corp. and changed its name to Polaris Infrastructure Inc. in May 2015. Polaris Infrastructure Inc. was incorporated in 1984 and is based in Toronto, Canada.

MEG Energy Corp., an energy company, focuses on sustainable in situ thermal oil production in the southern Athabasca region of Alberta, Canada. The company owns a 100% interest in approximately 450 square miles of mineral leases. It is developing oil recovery projects that utilize steam-assisted gravity drainage extraction methods to improve the recovery of oil, as well as lower carbon emissions. The company transports and sells thermal oil to refiners in North America and internationally. It primarily engages in sustainable in situ thermal oil production at its Christina Lake Project. The company was incorporated in 1999 and is headquartered in Calgary, Canada.

Pioneer Natural Resources Company operates as an independent oil and gas exploration and production company in the United States. The company explores for, develops, and produces oil, natural gas liquids (NGLs), and gas. It has operations in the Permian Basin in West Texas. As of December 31, 2020, the company had proved undeveloped reserves and proved developed non-producing reserves of 31 million barrels of oil, 17 million barrels of NGLs, and 88 billion cubic feet of gas; and owned interests in 11 gas processing plants. Pioneer Natural Resources Company was founded in 1997 and is headquartered in Irving, Texas.

Schlumberger Limited provides technology for the energy industry worldwide. The company operates through four divisions: Digital & Integration, Reservoir Performance, Well Construction, and Production Systems. It offers software, information management, and IT infrastructure services; consulting services for reservoir characterization, field development planning, and production enhancement; petro technical data services and training solutions; reservoir interpretation and data processing services; asset performance solutions; open and cased-hole services; exploration and production pressure and flow-rate measurement services; pressure pumping, well stimulation, and coiled tubing equipment for downhole mechanical well intervention, reservoir monitoring, and downhole data acquisition; and integrated production systems. The company also provides mud logging and engineering support services; drilling equipment and services for shipyards, drilling contractors, energy companies, and rental tool companies; land drilling rigs and related services; drilling tools; well cementing products and services; and well planning and drilling, engineering, supervision, logistics, procurement, contracting, and drilling rig management services, as well as supplies engineered drilling fluid systems; and designs, manufactures, and markets roller cone and fixed cutter drill bits. In addition, it offers well completion services and equipment; artificial lift production equipment and optimization services; valves; process systems; and integrated subsea production systems comprising wellheads, subsea trees, manifolds and flowline connectors, control systems, connectors, and services, as well as designs and manufactures onshore and offshore platform wellhead systems and processing solutions. The company was formerly known as Socie´te´ de Prospection E´lectrique. Schlumberger Limited was founded in 1926 and is based in Houston, Texas.

Marathon Petroleum Corporation, together with its subsidiaries, operates as an integrated downstream energy company primarily in the United States. It operates in two segments: Refining & Marketing, and Midstream. The Refining & Marketing segment refines crude oil and other feedstocks at its refineries in the Gulf Coast, Mid-Continent, and West Coast regions of the United States; and purchases refined products and ethanol for resale. Its refined products include transportation fuels, such as reformulated gasolines and blend-grade gasolines; heavy fuel oil; and asphalt. This segment also manufactures aromatics, propane, propylene, and sulfur. It sells refined products to wholesale marketing customers in the United States and internationally, buyers on the spot market, and independent entrepreneurs who operate primarily Marathon branded outlets; and through long-term fuel supply contracts to direct dealer locations primarily under the ARCO brand. The Midstream segment transports, stores, distributes, and markets crude oil and refined products through refining logistics assets, pipelines, terminals, towboats, and barges; gathers, processes, and transports natural gas; and gathers, transports, fractionates, stores, and markets natural gas liquids. It also owns and operates crude oil, natural gas, and refined product pipelines. As of December 31, 2021, the company operated 7,159 brand jobber outlets in 37 states, the District of Columbia, and Mexico through independent entrepreneurs. Petroleum Corporation was founded in 1887 and is headquartered in Findlay, Ohio.

Continental Resources, Inc. explores for, develops, and produces crude oil and natural gas primarily in the north, south, and east regions of the United States. The company sells its crude oil and natural gas production to energy marketing companies, crude oil refining companies, and natural gas gathering and processing companies. As of December 31, 2020, its proved reserves were 1,104 million barrels of crude oil equivalent (MMBoe) with proved developed reserves of 627 MMBoe. The company was founded in 1967 and is headquartered in Oklahoma City, Oklahoma.

Callon Petroleum Company, an independent oil and natural gas company, focuses on the acquisition, exploration, and development of oil and natural gas properties in Permian Basin in West Texas. As of December 31, 2020, its estimated net proved reserves totaled approximately 475.9 million barrel of oil equivalent, including 289.5 MMBbls oil, 541.6 Bcf of natural gas, and 96.1 MMBbls of natural gas liquids. The company was founded in 1950 and is headquartered in Houston, Texas.

The Williams Companies, Inc., together with its subsidiaries, operates as an energy infrastructure company primarily in the United States. It operates through Transmission & Gulf of Mexico, Northeast G&P, and West segments. The Transmission & Gulf of Mexico segment comprises Transco and Northwest natural gas pipelines; and natural gas gathering and processing, and crude oil production handling and transportation assets in the Gulf Coast region. The Northeast G&P segment engages in the midstream gathering, processing, and fractionation activities in the Marcellus Shale region primarily in Pennsylvania and New York, and the Utica Shale region of eastern Ohio. The West segment comprises gas gathering, processing, and treating operations in the Rocky Mountain region of Colorado and Wyoming, the Barnett Shale region of north-central Texas, the Eagle Ford Shale region of South Texas, the Haynesville Shale region of northwest Louisiana, and the Mid-Continent region, which includes the Anadarko, Arkoma, and Permian basins; and natural gas liquid (NGL) and natural gas marketing operations, as well as storage facilities. The company owns and operates 30,000 miles of pipelines, 34 processing facilities, 9 fractionation facilities, and approximately 23 million barrels of NGL storage capacity. The Williams Companies, Inc. was founded in 1908 and is headquartered in Tulsa, Oklahoma.

Phillips 66 operates as an energy manufacturing and logistics company. It operates through four segments: Midstream, Chemicals, Refining, and Marketing and Specialties (M&S). The Midstream segment transports crude oil and other feedstocks; delivers refined petroleum products to market; provides terminaling and storage services for crude oil and refined petroleum products; transports, stores, fractionates, exports, and markets natural gas liquids; provides other fee-based processing services; and gathers, processes, transports, and markets natural gas. The Chemicals segment produces and markets ethylene and other olefin products; aromatics and styrenics products, such as benzene, cyclohexane, styrene, and polystyrene; and various specialty chemical products, including organosulfur chemicals, solvents, catalysts, and chemicals used in drilling and mining. The Refining segment refines crude oil and other feedstocks into petroleum products comprising gasolines, distillates, and aviation fuels at 13 refineries in the United States and Europe. The M&S segment purchases for resale and markets refined petroleum products consisting of gasolines, distillates, and aviation fuels primarily in the United States and Europe. It also manufactures and markets specialty products, such as base oils and lubricants. The company was founded in 1875 and is headquartered in Houston, Texas.

Kinder Morgan, Inc. operates as an energy infrastructure company in North America. The company operates through Natural Gas Pipelines, Products Pipelines, Terminals, and CO2 segments. The Natural Gas Pipelines segment owns and operates interstate and intrastate natural gas pipeline, and underground storage systems; natural gas gathering systems and natural gas processing and treating facilities; natural gas liquids fractionation facilities and transportation systems; and liquefied natural gas liquefaction and storage facilities. The Products Pipelines segment owns and operates refined petroleum products, and crude oil and condensate pipelines; and associated product terminals and petroleum pipeline transmix facilities. The Terminals segment owns and/or operates liquids and bulk terminals that stores and handles various commodities, including gasoline, diesel fuel, chemicals, ethanol, metals, and petroleum coke; and owns tankers. The CO2 segment produces, transports, and markets CO2 to recovery and production crude oil from mature oil fields; and owns interests in/or operates oil fields and gasoline processing plants, as well as operates a crude oil pipeline system in West Texas. It owns and operates approximately 83,000 miles of pipelines and 144 terminals. The company was formerly known as Kinder Morgan Holdco LLC and changed its name to Kinder Morgan, Inc. in February 2011. Kinder Morgan, Inc. was founded in 1936 and is headquartered in Houston, Texas.

Valero Energy Corporation manufactures, markets, and sells transportation fuels and petrochemical products in the United States, Canada, the United Kingdom, Ireland, and internationally. It operates through three segments: Refining, Renewable Diesel, and Ethanol. The company is involved in oil and gas refining, marketing, and bulk selling activities. It produces conventional, premium, and reformulated gasolines; gasoline meeting the specifications of the California Air Resources Board (CARB); diesel fuels, low-sulfur and ultra-low-sulfur diesel fuels; CARB diesel; other distillates; jet fuels; blendstocks; lube oils and natural gas liquids; and asphalts, petrochemicals, lubricants, and other refined petroleum products. As of December 31, 2020, the company owned 15 petroleum refineries with a combined throughput capacity of approximately 3.2 million barrels per day. It sells its refined products through wholesale rack and bulk markets; and through approximately 7,000 outlets under the Valero, Beacon, Diamond Shamrock, Shamrock, Ultramar, and Texaco brands. The company also produces and sells ethanol, dry distiller grains, syrup, and inedible corn oil primarily to refiners and gasoline blenders, as well as to animal feed customers. It owns and operates 13 ethanol plants with a combined ethanol production capacity of approximately 1.69 billion gallons per year. In addition, the company owns and operates crude oil and refined petroleum products pipelines, terminals, tanks, marine docks, truck rack bays, and other logistics assets. Further, it owns and operates a plant that processes animal fats, used cooking oils, and other vegetable oils into renewable diesel. The company was formerly known as Valero Refining and Marketing Company and changed its name to Valero Energy Corporation in August 1997. Valero Energy Corporation was founded in 1980 and is headquartered in San Antonio, Texas.

ONEOK, Inc., together with its subsidiaries, engages in gathering, processing, storage, and transportation of natural gas in the United States. It operates through Natural Gas Gathering and Processing, Natural Gas Liquids, and Natural Gas Pipelines segments. The company owns natural gas gathering pipelines and processing plants in the Mid-Continent and Rocky Mountain regions. It also gathers, treats, fractionates, and transports natural gas liquids (NGL), as well as stores, markets, and distributes NGL products. The company owns NGL gathering and distribution pipelines in Oklahoma, Kansas, Texas, New Mexico, Montana, North Dakota, Wyoming, and Colorado; terminal and storage facilities in Kansas, Missouri, Nebraska, Iowa, and Illinois; and NGL distribution and refined petroleum products pipelines in Kansas, Missouri, Nebraska, Iowa, Illinois, and Indiana, as well as owns and operates truck- and rail-loading, and -unloading facilities connected to NGL fractionation, storage, and pipeline assets. In addition, it operates regulated interstate and intrastate natural gas transmission pipelines and natural gas storage facilities. Further, the company owns and operates a parking garage in downtown Tulsa, Oklahoma; and leases excess office space. It operates 18,900 miles of natural gas gathering pipelines; 1,500 miles of FERC-regulated interstate natural gas pipelines; 5,100 miles of state-regulated intrastate transmission pipeline; and 6 NGL storage facilities. It serves integrated and independent exploration and production companies; NGL and natural gas gathering and processing companies; crude oil and natural gas production companies; propane distributors; municipalities; ethanol producers; and petrochemical, refining, and NGL marketing companies, as well as natural gas distribution companies, electric generation facilities, industrial companies, producers, processors, and marketing companies. The company was founded in 1906 and is headquartered in Tulsa, Oklahoma.