Suncor Energy Inc. operates as an integrated energy company in Canada, the United States, and internationally. It operates through Oil Sands; Exploration and Production; and Refining and Marketing segments. The Oil Sands segment explores, develops, and produces bitumen, synthetic crude oil, and related products. This segment also engages in oil sands mining. The Exploration and Production segment is involved in offshore operations in the East Coast of Canada; and marketing and risk management of crude oil and natural gas. The Refining and Marketing segment engages in the refining of crude oil products; and distribution, marketing, transportation, and risk management of refined and petrochemical products, and other purchased products through the retail and wholesale networks. This segment is also involved in the trading of crude oil, refined products, natural gas, and power. The company was formerly known as Suncor Inc. and changed its name to Suncor Energy Inc. in April 1997. Suncor Energy Inc. was founded in 1917 and is headquartered in Calgary, Canada. Suncor Energy Inc.

Marathon Petroleum Corporation, together with its subsidiaries, operates as an integrated downstream energy company primarily in the United States. The company operates through Refining & Marketing, and Midstream segments. 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 and distributes refined products, including renewable diesel, through transportation, storage, distribution, and marketing services. Its refined products include transportation fuels, such as reformulated gasolines and blend-grade gasolines; heavy fuel oil; and asphalt. This segment also manufactures propane and petrochemicals. 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, as well as 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. Marathon Petroleum Corporation was founded in 1887 and is headquartered in Findlay, Ohio.

Valero Energy Corporation manufactures, markets, and sells petroleum-based and low-carbon liquid transportation fuels and petrochemical products in the United States, Canada, the United Kingdom, Ireland, Latin America, Mexico, Peru, and internationally. It operates through three segments: Refining, Renewable Diesel, and Ethanol. The company produces California Reformulated Gasoline Blendstock for Oxygenate Blending and Conventional Blendstock for Oxygenate Blending gasolines, CARB diesel, diesel, jet fuel, heating oil, and asphalt; feedstocks; aromatics; sulfur and residual fuel oil; intermediate oils; and sulfur, sweet, and sour crude oils. It sells its refined products through wholesale rack and bulk markets; and through outlets under the Valero, Beacon, Diamond Shamrock, Shamrock, Ultramar, and Texaco brands. The company owns and operates renewable diesel and ethanol plants, as well as produces renewable diesel and naphtha under the Diamond Green Diesel brand name. In addition, it offers ethanol and various co-products, including dry distiller grains, syrup, and inedible distillers corn oil to animal feed customers. 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.

Cenovus Energy Inc., together with its subsidiaries, develops, produces, refines, transports, and markets crude oil, natural gas, and refined petroleum products in Canada and internationally. The company operates through Oil Sands, Conventional, Offshore, Canadian Refining, and U.S. Refining segments. The Oil Sands segment develops and produces bitumen and heavy oil in northern Alberta and Saskatchewan. This segment assets include Foster Creek, Christina Lake, and Sunrise projects, as well as Lloydminster thermal and conventional heavy oil assets. The Conventional segment holds natural gas liquids and natural gas assets primarily located in Elmworth-Wapiti, Kaybob-Edson, Clearwater, and Rainbow Lake operating in Alberta and British Columbia, as well as interests in various natural gas processing facilities. The offshore segment engages in offshore operation, exploration, and development activities in China and the East Coast of Canada. The Canadian Refining segment owns and operates Lloydminster upgrading and asphalt refining complex, which converts heavy oil and bitumen into synthetic crude oil, diesel, asphalt, and other ancillary products, as well as Bruderheim crude-by-rail terminal and ethanol plants. The U.S. Refining segment refines crude oil to produce gasoline, diesel, jet fuel, asphalt, and other products. Cenovus Energy Inc. is headquartered in Calgary, Canada.

NewMarket Corporation, through its subsidiaries, primarily engages in the manufacture and sale of petroleum additives. The company offers lubricant additives for use in various vehicle and industrial applications, including engine oils, transmission fluids, off-road powertrain and hydraulic systems, gear oils, hydraulic oils, turbine oils, and other applications where metal-to-metal moving parts are utilized; engine oil additives designed for passenger cars, motorcycles, on and off-road heavy duty commercial equipment, locomotives, and engines in ocean-going vessels; driveline additives designed for products, such as transmission fluids, axle fluids, and off-road powertrain fluids; and industrial additives designed for products for industrial applications consisting of hydraulic fluids, grease, industrial gear fluids, and industrial specialty applications, such as turbine oils. It also provides fuel additives that are used to enhance the oil refining process and the performance of gasoline, diesel, biofuels, and other fuels to industry, government, original equipment manufacturers, and individual customers. In addition, the company engages in the marketing of antiknock compounds, as well as contracted manufacturing and services activities; and owns and manages a real property in Virginia. It operates in North America, Latin America, Asia Pacific, Europe, the Middle East, Africa, and India. NewMarket Corporation was founded in 1887 and is headquartered in Richmond, Virginia.

Innospec Inc. develops, manufactures, blends, markets, and supplies specialty chemicals in the United States, rest of North America, the United Kingdom, rest of Europe, and internationally. The company's Fuel Specialties segment offers a range of specialty chemical products that are used as additives in additives in diesel, jet, marine, fuel oil and other fuels. This segment's products are used in the operation of commercial trucking, marine and aviation engines, power station generators, heating oil, and other industrial machinery applications. Its Performance Chemicals segment provides technology-based solutions for its customers' processes or products that focuses on the personal care, home care, agrochemical, construction, mining, and other industrial markets. The company's Oilfield Services segment develops and markets chemical solutions for drilling, completion, fracturing, stimulation, and completion operations; and products for oil and gas production. It sells its products primarily to oil and gas exploration and production companies, oil refineries, fuel manufacturers and users, personal care and home care companies, formulators of agrochemical, and other chemical and industrial companies. The company was formerly known as Octel Corp. and changed its name to Innospec Inc. in January 2006. Innospec Inc. was founded in 1938 and is headquartered in Englewood, Colorado.

Aemetis, Inc. operates as a renewable natural gas and renewable fuels company. It operates through three segments: California Ethanol, California Dairy Renewable Natural Gas, and India Biodiesel. The company focuses on the operation, acquisition, development, and commercialization of technologies to produce low and negative carbon intensity renewable fuels that replace fossil-based products. In addition, it produces and sells ethanol; and wet distillers grains, distillers corn oil, and condensed distillers solubles to dairies and feedlots as animal feed. Further, the company markets and supplies USP alcohol and hand sanitizer; and produces renewable natural gas, as well as distilled biodiesel from various vegetable oil and animal waste feedstocks. Additionally, it researches and develops conversion technologies using waste feedstocks to produce biofuels and biochemicals. Furthermore, it sells biodiesel primarily to government oil marketing companies. Aemetis, Inc. is headquartered in Cupertino, California.

Imperial Oil Limited engages in exploration, production, and sale of crude oil and natural gas in Canada. The company operates through three segments: Upstream, Downstream and Chemical segments. The Upstream segment explores and produces crude oil, natural gas, synthetic crude oil, and bitumen. The Downstream segment transports and refines crude oil, blends refined products, and distributes and markets of refined products. It transports crude oil production and third-party crude oil to refineries by contracted pipelines, common carrier pipelines, and rail; owns and operates refineries; maintains a distribution system to move petroleum products to market by pipeline, tanker, rail, and road transport; owns and operates fuel terminals, natural gas liquids, and products pipelines in Alberta, Manitoba, and Ontario; markets petroleum products under the Esso and Mobil brand names; and sells petroleum products, including fuel, asphalt, and lubricants to industrial and transportation customers, independent marketers, resellers, and other refiners, as well as the agriculture, residential heating, and commercial markets through branded fuel and lubricant resellers. The Chemical segment manufactures and markets benzene, aromatic and aliphatic solvents, plasticizer intermediates, and polyethylene resin; and markets refinery grade propylene. The company was incorporated in 1880 and is headquartered in Calgary, Canada. Imperial Oil Limited is a subsidiary of Exxon Mobil Corporation.