Petro-Canada is a retail and wholesale marketing brand subsidiary of Suncor Energy. Until 1991, it was a federal Crown corporation. In August 2009, Petro-Canada merged with Suncor Energy, with Suncor shareholders receiving approximately 60 percent ownership of the combined company and Petro-Canada shareholders receiving approximately 40 percent. The company retained the Suncor Energy name for the merged corporation and its upstream operations. It continues to use the Petro-Canada name nationwide.
China Petroleum & Chemical Corporation (中国石油化工股份有限公司), or Sinopec, is a Chinese oil and gas enterprise based in Beijing. It is listed in Hong Kong and also trades in Shanghai.
BP Canada was a Canadian petroleum company and subsidiary of British Petroleum that existed between 1955 and 1992. The name refers to a group of companies that engaged in various segments of the petroleum industry lifecycle. BP entered the Canadian market in October 1953 when it purchased a 23 percent stake in the Triad Oil Company. In 1955, BP formed a Canadian subsidiary, based in Montreal, called BP Canada Limited. The company began acquiring retail stations in Ontario and Quebec and in 1957 started construction on a refinery in Montreal. By the end of the 1950s BP Canada was a fully-integrated operation. In 1964 it acquired from Cities Service the Oakville Refinery, and then expanded its operations significantly in 1971 when it acquired Supertest Petroleum.
Marathon Oil Corporation is an American company engaged in hydrocarbon exploration incorporated in Ohio and headquartered in the Marathon Oil Tower in Houston, Texas. A direct descendant of Standard Oil, it also runs international gas operations focused on Equatorial Guinea, offshore Central Africa.
Suncor Energy is a Canadian integrated energy company based in Calgary, Alberta. It specializes in production of synthetic crude from oil sands. In the 2020 Forbes Global 2000, Suncor Energy was ranked as the 48th-largest public company in the world.
PetroKazakhstan is a Canadian oil company, based in Calgary, Alberta, that has all of its business focused on Kazakhstan where it had some 550 million barrels (87,000,000 m3) of oil and 25 billion cubic feet (710,000,000 m3) of natural gas reserves in the Turgai basin region. These are the second largest Kazakhstani proven reserves after ChevronTexaco's TengizChevroil. Estimated production is 165,000 barrels (26,200 m3) of oil per day. In 2005, PetroKazakhstan was acquired by China National Petroleum Corporation and then in 2006 transferred to PetroChina.
CNOOC Petroleum North America ULC, formerly known as Nexen, is a Canadian oil and gas company based in Calgary, Alberta.
Talisman Energy Inc. was a Canadian independent petroleum company that existed between 1993 and 2015. The company was created from the assets of BP Canada after British Petroleum divested its 57 percent stake in June 1992. It was one of Canada's largest independent oil and gas companies, and operated globally, with operations in Canada and the United States of America in North America; Colombia, South America; Algeria in North Africa; United Kingdom and Norway in Europe; Indonesia, Malaysia, Vietnam, Papua New Guinea, East Timor and Australia in the Far East; and Kurdistan in the Middle East. Talisman Energy has also built the offshore Beatrice Wind Farm in the North Sea off the coast of Scotland.
The China National Petroleum Corporation (CNPC) is a major national oil and gas corporation of China and one of the largest integrated energy groups in the world. Its headquarters are in Dongcheng District, Beijing. CNPC was ranked fourth in 2022 Fortune Global 500, a global ranking of the largest corporations by revenue.
APA Corporation is the holding company for Apache Corporation, an American company engaged in hydrocarbon exploration. It is organized in Delaware and headquartered in Houston. The company is ranked 431st on the Fortune 500.
China United Coalbed Methane Corp., Ltd. (CUCBM), also known as China CBM, is state-owned company in China, which had exclusive rights until 2010 to explore, develop and produce coal mine methane in cooperation with overseas companies. The company was established in 1996.
Noble Energy, Inc. was a company engaged in hydrocarbon exploration headquartered in Houston, Texas. In October 2020, the company was acquired by Chevron Corporation.
Korea National Oil Corporation (KNOC) is the national oil and gas company of South Korea and one of the most important industrial companies in the country. The company has operated and continues to operate oil and gas fields in Vietnam, Peru, Indonesia, Nigeria, Yemen, Kazakhstan, Russia, China, Canada Venezuela, the United Kingdom and South Korea.
Crescent Petroleum is the first and largest private upstream oil and gas company in the Middle East. Founded in 1971, Crescent Petroleum is headquartered in the Emirate of Sharjah, United Arab Emirates (UAE), with current operations in both the UAE and the Kurdistan Region of Iraq (KRI). As of 2023, Crescent Petroleum and the Iraqi Ministry of Oil have signed three twenty-year contracts as the company focus it efforts in aiding the redevelopment of Iraq.
Although there are numerous oil companies operating in Canada, as of 2009, the majority of production, refining and marketing was 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.
Addax Petroleum was established in 1994 and since August 2009, has been a subsidiary of the Sinopec Group, one of the largest oil and gas producers in China, the biggest oil refiner in Asia and the third largest worldwide. Addax Petroleum was an international gas and oil production and exploration company mainly focused on the Middle East, the North Sea and Africa. Since its founding, the company has become one of the largest oil producers in West Africa.
Sara and Myra were two Israeli offshore drilling licenses located west of Netanya, Israel. The licenses expired on July 13, 2015. Exploratory drilling in the license area in 2012 was unsuccessful, but seismic studies indicated the possibility of oil and gas at deeper strata that were not explored.
Cove Energy plc, also known as Cove, was a London-headquartered oil & gas exploration company with assets in East Africa. The company was created in June 2009. In 2012, following significant gas discoveries offshore Mozambique, Royal Dutch Shell and PTT Exploration and Production (PTTEP), a subsidiary of Thailand's national oil company PTT Public Company Limited, engaged in a prominent bidding war to acquire Cove. Ultimately, the company was sold in August 2012 to PTTEP.
Gulf Canada was a Canadian integrated petroleum company that existed between 1944 and 2001. Gulf Oil Corporation began operating in Canada in 1942, and two years later formed a Canadian subsidiary called the Canadian Gulf Oil Company. In 1956 Canadian Gulf Oil merged with the British American Oil Company and until 1969 operated under the British American name. In 1969 British American amalgamated with its subsidiaries into a new company called Gulf Oil Canada Limited.
Ranger Oil Limited was a Canadian independent petroleum company that operated between 1950 and 2000. Ranger was founded as the Maygill Petroleum Company Limited with the aim to develop oil leases in the Steveville, Alberta area. In 1954, Jack Piece (1924–1991), originally of Montreal, acquired control of the company and renamed it West Maygill Gas and Oil Limited. In 1956, Maygill purchased an American company Pierce had founded, the Ranger Oil Company, and in 1958 renamed itself Ranger Oil (Canada) Limited. Over the subsequent decades, Pierce built Ranger into one of Canada's most successful independent producers. During the 1970s and 1980s, Ranger played an active role in the development of the North Sea. In 2000, Canadian Natural Resources acquired Ranger.
