Gulf Oil was a major global oil company in operation from 1901 to 1985. The eighth-largest American manufacturing company in 1941 and the ninth-largest in 1979, Gulf Oil was one of the so-called Seven Sisters oil companies. Prior to its merger with Standard Oil of California, Gulf was one of the chief instruments of the Mellon family fortune; both Gulf and Mellon Financial had their headquarters in Pittsburgh, Pennsylvania, with Gulf's headquarters, the Gulf Tower, being Pittsburgh's tallest building until the completion of the U.S. Steel Tower.
Sunoco LP is an American master limited partnership organized under Delaware state laws and headquartered in Dallas, Texas. Dating back to 1886, the company has transitioned from a vertically integrated energy company to a distributor of fuels. It was previously engaged in oil, natural gas exploration and production, refining, chemical manufacturing, and retail fuel sales, but divested these businesses. Sunoco is the largest independent distributor of fuels in the United States.
Chevron Corporation is an American multinational energy corporation predominantly in oil and gas. The second-largest direct descendant of Standard Oil, and originally known as the Standard Oil Company of California, it is headquartered in San Ramon, California, and active in more than 180 countries. Within oil and gas, Chevron is vertical integrated and is involved in hydrocarbon exploration, production, refining, marketing and transport, chemicals manufacturing and sales, and power generation.
Valero Energy Corporation is an American-based downstream petroleum company mostly involved in manufacturing and marketing transportation fuels, other petrochemical products, and power. It is headquartered in San Antonio, Texas, United States. Throughout the United States and Canada, the company owns and operates 15 refineries, and one in Wales, with a combined throughput capacity of approximately 3 million barrels (480,000 m3) per day, 11 ethanol plants with a combined production capacity of 1.2 billion US gallons (4,500,000 m3) per year, and a 50-megawatt wind farm. A Fortune 500 company, before the 2013 spinoff of CST Brands, Valero was one of the United States' largest retail operators with approximately 6,800 retail and branded wholesale outlets in the United States, Canada, United Kingdom, and the Caribbean under the Valero, Diamond Shamrock, Shamrock, Beacon, and Texaco brands.
Tesoro Corporation, known briefly as Andeavor, was a Fortune 100 and a Fortune Global 500 company headquartered in San Antonio, Texas, with 2017 annual revenues of $35 billion, and over 14,000 employees worldwide. Based on 2017 revenue, the company ranked No. 90 in the 2018 Fortune 500 list of the largest United States corporations by total revenue.
Enbridge Inc. is a multinational pipeline and energy company headquartered in Calgary, Alberta, Canada. Enbridge owns and operates pipelines throughout Canada and the United States, transporting crude oil, natural gas, and natural gas liquids. Enbridge's pipeline system is the longest in North America and the largest oil export pipeline network in the world. Its crude oil system consists of 28,661 kilometres of pipelines. Its 38,300 kilometre natural gas pipeline system connects multiple Canadian provinces, several US states, and the Gulf of Mexico. The company was formed by Imperial Oil in 1949 as the Interprovincial Pipe Line Company Limited to transport Alberta oil to refineries. Over time, it has grown through acquisition of other existing pipeline companies and the expansion of their projects. Between 2012 and 2021, Enbridge transported over 32 billion barrels of crude oil.
Irving Oil Ltd. is a Canadian privately-owned intergenerational gasoline, oil, and natural gas producing and exporting company, a subsidiary of the parent company Irving Group of Companies,—one of the largest "private conglomerates" in North America. Irving Oil was one established in 1924 by Canadian oil baron and billionaire, Kenneth "K.C." Irving, whose family fortune when he died was estimated by Forbes at USD$5 billion. His son, Arthur, became chairman and president of Irving Oil.
Marathon Petroleum Corporation is an American petroleum refining, marketing, and transportation company headquartered in Findlay, Ohio. The company was a wholly owned subsidiary of Marathon Oil until a corporate spin-off in 2011.
Hess Corporation is an American global independent energy company involved in the exploration and production of crude oil and natural gas. It was formed by the merger of Hess Oil and Chemical and Amerada Petroleum in 1968. Leon Hess served as CEO from the early 1960s through 1995, after which his son John B Hess succeeded him as chairman and CEO.
Kinder Morgan, Inc. is one of the largest energy infrastructure companies in North America. The company specializes in owning and controlling oil and gas pipelines and terminals.
World Fuel Services Corporation is an energy, commodities, and services company based in Doral, Florida. The company ranked No. 70 in the 2022 Fortune 500 list of the largest United States corporations. WFS focuses on the marketing, trading, and financing of aviation, marine, building, and ground transportation energy commodities and related services. As of 2013, WFS also operates in natural gas and power.
PTT Public Company Limited or simply PTT is a Thai state-owned SET-listed oil and gas company. Formerly known as the Petroleum Authority of Thailand, it owns extensive submarine gas pipelines in the Gulf of Thailand, a network of LPG terminals throughout the kingdom, and it is involved in electricity generation, petrochemical products, oil and gas exploration and production, and gasoline retailing businesses. The company also owns Café Amazon, a popular coffee chain throughout South East Asia, which shops are often located next to PTT gas stations or inside malls.
Polskie Górnictwo Naftowe i Gazownictwo S.A., abbreviated to PGNiG, is a Polish state-controlled oil and gas company, headquartered in Warsaw, Poland. The company has branches and representative offices in Russia, Pakistan, Belarus and Ukraine and holds equity interests in some 30 subsidiaries, including providers of specialist geophysical, drilling and well services.
The Ministry of Petroleum (MOP) (Persian: وزارت نفت, romanized: Vezârat-e Naft) manages the oil industry, the producer of oil and petrochemical products. MoP is in charge of all issues pertaining to exploration, extraction, exploitation, distribution and exportation of crude oil and oil products. In addition, according to the "Imports and Exports Regulation Act", issuing import licenses for such products is also among the functions of the Ministry of Petroleum. The ministry has been placed under sanctions by the United States Department of State as of 2020.
Western Refining, Inc., is a Texas-based Fortune 200 and Global 2000 crude oil refiner and marketer operating primarily in the Southwestern, North-Central and Mid-Atlantic regions of the United States. Western Refining (WNR) has been publicly traded on the New York Stock Exchange since January 2006 and is the fourth largest publicly traded independent refiner and marketer in the nation. Western Refining has been acquired by Tesoro another independent petroleum Refining and marketing corporation.
Coastal Corporation was a diversified energy and petroleum products company headquartered at 9 Greenway Plaza in Greenway Plaza, Houston, Texas. The company was founded in 1955 by Oscar Wyatt and incorporated in 1955 as Coastal States Gas Producing Company. It merged with the El Paso Corporation in 2001. As of 1999, Coastal was a Fortune 500 company with 13,300 employees and annual revenues of $8.2 billion.
Pembina Pipeline is a Canadian corporation that operates transportation and storage infrastructure delivering oil and natural gas to and from parts of Western Canada ; there is also a natural gas processing business that takes place at the Cutbank Complex. Western Canada is the source of all the product transported by its systems. Some of the pipelines and facilities have short term contracts with oil producers while others are long term. For 37 years until 1997 when it went public and established itself as a trust, Pembina was a regular privately owned business. On October 1, 2010 it converted to a corporation from a trust, changing its official name from Pembina Pipeline Income Fund to Pembina Pipeline Corporation. As of 2016 the company had more than 1260 employees, up from 427 in 2010. The company's total assets nearly doubled in 2017.
Quality Distribution, Inc. (Quality) is a Tampa, Florida-based trucking and chemical transportation business. On August 18, 2015, Quality completed its previously announced merger agreement with funds advised by Apax Partners LLP on May 6, 2015.
Cnergyico Pk Limited is a Pakistani petroleum company which is a subsidiary of the Mauritian company Cnergyico Industries Incorporated. The company is vertically integrated across the oil refining and marketing industries, notable for being the only petroleum company in Pakistan to own and operate a crude oil terminal. Cnergyico operates Pakistan’s biggest oil refinery in terms of nameplate capacity, the largest capacity crude oil storage tanks in the country, and a network of petrol pumps.
$1.944 Billion (2015) [2] 
