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.

HF Sinclair Corporation operates as an independent energy company. The company produces and markets gasoline, diesel fuel, jet fuel, renewable diesel, specialty lubricant products, specialty chemicals, specialty and modified asphalt, and others. It owns and operates refineries located in Kansas, Oklahoma, New Mexico, Utah, Washington, and Wyoming; and markets its refined products principally in the Southwest United States and Rocky Mountains, Pacific Northwest, and in other neighboring Plains states. In addition, the company supplies fuels to approximately 1,500 independent Sinclair branded stations and licenses the use of the Sinclair brand at approximately 300 additional locations. Further, it produces base oils and other specialized lubricants; and provides petroleum product and crude oil transportation, terminalling, storage, and throughput services to the petroleum sector. HF Sinclair Corporation is headquartered in Dallas, Texas.

Suburban Propane Partners, L.P., through its subsidiaries, engages in the retail marketing and distribution of propane, renewable propane, fuel oil, and refined fuels in the United States. The company operates through four segments: Propane, Fuel Oil and Refined Fuels, Natural Gas and Electricity, and All Other. The Propane segment is involved in the retail distribution of propane for space heating, water heating, cooking, and clothes drying for use as a motor fuel in internal combustion engines to power over-the-road vehicles, forklifts, and stationary engines, as well as to fire furnaces as a cutting gas to the industrial customers; and for tobacco curing, crop drying, poultry brooding, and weed control in the agricultural markets. It also engages in the wholesale distribution of propane to industrial end users. Its Fuel Oil and Refined Fuels segment engages in the retail distribution of fuel oil, diesel, kerosene, and gasoline to residential and commercial customers for use in primarily as a source of heat in homes and buildings. The Natural Gas and Electricity segment markets natural gas and electricity to residential and commercial customers in the deregulated energy markets in New York and Pennsylvania. The All Other segment sells, installs, and services a range of home comfort equipment, including whole-house heating products, air cleaners, humidifiers, and space heaters. The company serves residential, commercial, industrial, and agricultural customers primarily in the east and west coast regions of the United States, as well as portions of the Midwest region of the United States and Alaska. Suburban Propane Partners, L.P. was founded in 1945 and is based in Whippany, New Jersey.

CrossAmerica Partners LP engages in the wholesale distribution of motor fuels, operation of convenience stores, and ownership and leasing of real estate used in the retail distribution of motor fuels in the United States. It operates in two segments, Wholesale and Retail. The Wholesale segment engages in the wholesale distribution of motor fuels to lessee dealers, independent dealers, commission agents, and company operated retail sites. The Retail segment is involved in the sale of convenience merchandise items; and retail sale of motor fuels at company operated retail sites and retail sites operated by commission agents. CrossAmerica GP LLC operates as the general partner of the company. The company was formerly known as Lehigh Gas Partners LP and changed its name to CrossAmerica Partners LP in October 2014. The company was founded in 1992 and is based in Allentown, Pennsylvania.

Delek US Holdings, Inc. engages in the integrated downstream energy business in the United States. The company operates through Refining, Logistics, and Retail segments. The Refining segment processes crude oil and other feedstock for the manufacture of various grades of gasoline, diesel fuel, aviation fuel, asphalt, and other petroleum-based products that are distributed through owned and third-party product terminal. It owns and operates refineries located in Tyler, Texas; El Dorado, Arkansas; Big Spring, Texas; and Krotz Springs, Louisiana, as well as biodiesel facilities in Crossett, Arkansas, Cleburne, Texas, and New Albany, Mississippi. The Logistics segment gathers, transports, and stores crude oil, intermediate, and refined products; and markets, distributes, transports, and stores refined products, as well as disposes and recycles water for third parties. It owns or leases crude oil transportation pipelines, refined product pipelines, crude oil gathering systems, and associated crude oil storage tanks; and owns and operates light product distribution terminals, as well as markets light products using third-party terminals. The Retail segment owns and leases convenience store sites located primarily in West Texas and New Mexico. Its convenience stores offer various grades of gasoline and diesel under the DK or Alon brand; and food products and service, tobacco products, non-alcoholic and alcoholic beverages, and general merchandise, as well as money orders to the public primarily under the 7-Eleven and DK or Alon brand names. It serves oil companies, independent refiners and marketers, jobbers, distributors, utility and transportation companies, government, and independent retail fuel operators. Delek US Holdings, Inc. was founded in 2001 and is headquartered in Brentwood, Tennessee.

Par Pacific Holdings, Inc. owns and operates energy and infrastructure businesses. The company operates through Refining, Retail, and Logistics segments. The Refining segment owns and operates refineries that produce gasoline, distillate, asphalt, and other products primarily for consumption in Kapolei, Hawaii, Newcastle, Wyoming, Tacoma, Washington, and Billings, Montana. The Retail segment operates fuel retail outlets, which sell merchandise, such as soft drinks, prepared foods, and other sundries in Hawaii under the Hele, 76, and nomnom brands; and gasoline, diesel, and retail merchandise in Washington and Idaho. The Logistics segment owns and operates terminals, pipelines, single point mooring, marine vessels, storage facilities, loading and truck racks, and rail facilities to distribute ethanol, petroleum, and refined products throughout Hawaii, the United States West Coast, Washington, the Dakotas, and Wyoming; and a jet fuel storage facility and pipeline that serves Ellsworth Air Force Base in South Dakota. It also holds interest in refined products pipeline. In addition, the company owns and operates a marine terminal, a unit train-capable rail loading terminal; a truck rack, and a proprietary pipeline that serves Joint Base Lewis McChord. The company was formerly known as Par Petroleum Corporation and changed its name to Par Pacific Holdings, Inc. in October 2015. Par Pacific Holdings, Inc. was incorporated in 1984 and is headquartered in Houston, Texas.