Enron Corporation was an American energy, commodities, and services company based in Houston, Texas. It was founded in 1985 as a merger between Houston Natural Gas and InterNorth, both relatively small regional companies. Before its bankruptcy on December 3, 2001, Enron employed approximately 29,000 staff and was a major electricity, natural gas, communications and pulp and paper company, with claimed revenues of nearly $101 billion during 2000. Fortune named Enron "America's Most Innovative Company" for six consecutive years.
Husky Energy Inc. is a Canadian-based integrated energy company, headquartered in Calgary, Alberta. Its common shares are publicly traded on the Toronto Stock Exchange under the symbol HSE. The company operates in Western and Atlantic Canada, the United States and the Asia Pacific region, with upstream and downstream business segments. Husky Energy is controlled by Hong Kong billionaire Li Ka-Shing, who owns a majority share of approximately 70% according to Bloomberg and Financial Post data.
Encana Corporation, also known as Ovintiv, is an oil company headquartered in Calgary, Alberta, Canada, with its headquarters moving to Denver, Colorado, United States in 2020. The company is ranked 1134th on the Forbes Global 2000 and has been included on the Dow Jones Sustainability Index.
Occidental Petroleum Corporation is an American company engaged in hydrocarbon exploration in the United States, the Middle East, and Colombia as well as petrochemical manufacturing in the United States, Canada, and Chile. It is organized in Delaware and headquartered in Houston. The company is ranked 722nd on the Forbes Global 2000 and 220th on the Fortune 500.
Marathon Oil Corporation, usually simply referred to as Marathon Oil, is an American petroleum and natural gas exploration and production company headquartered in the Marathon Oil Tower in Houston, Texas. Marathon Oil is incorporated in Ohio.
Centrica plc is a British multinational energy and services company with its headquarters in Windsor, Berkshire. Its principal activity is the supply of electricity and gas to businesses and consumers in the United Kingdom, Ireland and North America.
Petróleo Brasileiro S.A. — Petrobras, more commonly known as simply Petrobras, is a semi-public Brazilian multinational corporation in the petroleum industry headquartered in Rio de Janeiro, Brazil. The company's name translates to Brazilian Petroleum Corporation — Petrobras.
Hess Corporation is an American global independent energy company engaged 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 led by Leon Hess. In 1995, his son John B Hess succeed him as chairman and CEO. Hess, headquartered in New York City, placed #394 in the 2016 list of Fortune 500 corporations. In 2014, Hess completed a multi-year transformation to an exploration and production company by exiting all downstream operations, generating approximately $13 billion from assets sales beginning in 2013. Hess sold its gas station network to Marathon Petroleum ; sold its wholesale and retail oil, natural gas and electricity marketing business to Direct Energy; closed its refineries in Port Reading NJ and St. Croix USVI ; sold its bulk storage and terminalling business mostly to Buckeye Partners; and sold its 50% interests in two New Jersey power plants to their respective JV partners. Hess also sold its 50% interest in its JV commodities trading arm HETCO to Oaktree Capital. HETCO is now known as Hartree Partners.
The China National Petroleum Corporation (CNPC) is a major national oil and gas corporation of China PR and one of the largest integrated energy groups in the world. Its headquarters are in Dongcheng District, Beijing. CNPC was ranked fourth in 2017 Fortune Global 500, a global ranking of the largest corporations by revenue.
Devon Energy Corporation is a company engaged in hydrocarbon exploration in the United States. It is organized in Delaware and headquartered in the 50-story Devon Energy Center in Oklahoma City, Oklahoma. Its operations are in the Barnett Shale, STACK Formation in Oklahoma, Delaware Basin, Eagle Ford Group shale, and the Rocky Mountains.
Apache Corporation is a company engaged in hydrocarbon exploration. It is organized in Delaware and headquartered in Houston. The company is ranked 438th on the Fortune 500.
Energy Transfer Partners is a company engaged in natural gas and propane pipeline transport. It is organized in Delaware and headquartered in Dallas, Texas. It was founded in 1995 by Ray Davis and Kelcy Warren, who remains Chairman and CEO. It owns a 36.4% interest in Dakota Access, LLC, the company responsible for developing the controversial Dakota Access Pipeline.
XTO Energy Inc. is an American energy company, principally operating in America, specializing in the drilling and production of unconventional oil and natural gas assets, typically from shale rock through a process known as hydraulic fracturing. It is a subsidiary of Exxon Mobil Corporation.
BP plc is a British multinational oil and gas company headquartered in London, United Kingdom. It is one of the world's seven oil and gas "supermajors", whose performance in 2012 made it the world's sixth-largest oil and gas company, the sixth-largest energy company by market capitalization and the company with the world's 12th-largest revenue (turnover). It is a vertically integrated company operating in all areas of the oil and gas industry, including exploration and production, refining, distribution and marketing, petrochemicals, power generation and trading. It also has renewable energy interests in biofuels, wind power and solar technology.
The Abu Dhabi National Energy Company, PJSC (TAQA) is a government controlled energy holding company of Abu Dhabi, United Arab Emirates.
Although there are numerous oil companies operating in Canada, the majority of production, refining and marketing is done by fewer than 20 of them. According to the 2013 edition of Forbes Global 2000, canoils.com and any other list that emphasizes market capitalization and revenue when sizing up companies, as of March 31, 2014 these are the largest Canada-based oil and gas companies. However more recent changes, possibly mergers or a stronger showing in the price of oil could mean a few of the oil sands producers are underrepresented; this is because Canadian companies are increasingly dependent on production from that source, which is hurt severely when oil prices decline below 50 to 60 dollars a barrel since costs per barrel traditionally exceed $28 and non-upgraded bitumen produces 1.7 fewer barrels per metric ton than West Texas Intermediate oil. A few of the larger companies don't show up in the Forbes list because its ranking system takes many different factors into account. Syncrude and Irving Oil are also leaders in the Canadian industry, with Syncrude being the top producer of oil sands crude and Irving Oil operating the largest oil refinery in the country. Also, based on the price paid for a 9% share in Syncrude Canada Ltd by Sinopec the company could be worth as much as US$50 billion. Canadian oil company profits quickly recovered from the financial crisis; In 2009 they were down 90% but in 2010 they reached $8.4 billion; Helping profits is the smaller price gap between West Texas Intermediate oil ($85/bbl) and Western Canadian heavy crude ($65/bbl) with the price of upgraded synthetic oil surpassing WTI when supply falls. The two largest are 2 of the 11 most valuable Canadian companies. 2,412 oil and gas companies are based in Calgary, Alberta alone.
Vermilion Energy is an international oil and gas producer based in Calgary, Canada. It has operations in North America, Europe and Australia. Vermilion is listed on the Toronto Stock Exchange and the New York Stock Exchange.
Chornomornaftogaz is an oil and gas company located along Krymgazseti in Simferopol, Crimea. It is legally a subsidiary of Ukraine's state-owned oil and gas company Naftogaz. However, after the 2014 Crimean crisis it was seized by the region's parliament in the run-up to its annexation by Russia. There was also a privately owned oil company Chernomorneftegaz, registered in Moscow in 1998 and purchased by Rosneft in 2011, which is not linked to Chornomornaftogaz.
Gulf Canada, originally British-American Oil and eventually Gulf Canada Resources, is a major Canadian integrated gas, oil, and resources company in operation since 1906. It was Canada's 4th largest oil company and operated over 9,000 retail gasoline outlets.
