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Marathon Petroleum Corporation is a United States based petroleum refining, marketing, and transportation company. The company was formed as a subsidiary on September 1, 2005, from the former Marathon Ashland Petroleum, LLC,〔(【引用サイトリンク】publisher=Ashland Inc )〕 and is based in Findlay, Ohio.〔(【引用サイトリンク】title=About Marathon Petroleum Corporation )〕 Marathon Petroleum operated as a subsidiary of the Marathon Oil until becoming a standalone company on July 1, 2011. ==History== In 1887, several small oil companies in Ohio banded together to form The Ohio Oil Company. In 1889, it was purchased by John D. Rockefeller's Standard Oil trust. It remained a part of Standard Oil until the trust was broken in 1911. In 1930, Ohio Oil bought the Transcontinental Oil Company, giving it the "Marathon" brand name. In 1962, the company changed its name to "Marathon Oil Company" after its primary brand. Marathon Petroleum Corporation began as Marathon Ashland Petroleum, LLC a U.S. based petroleum corporation, formed in 1998 from a merger of the downstream operations of Ashland, Inc., and Marathon Oil. Its corporate headquarters were in Findlay. Marathon owned 62% percent and Ashland owned 38% of this venture. The original Marathon company was also based in Findlay,〔() 〕 and began in 1887 as Ohio Oil Company before becoming Marathon in the 1960s.〔() 〕 On September 1, 2001, Marathon formed Pilot Travel Centers, LLC (PTC) in a joint venture with Pilot Corporation. Each company owned 50% of PTC. In 2008 Marathon Petroleum Company, LLC sold their ownership of the company to Pilot.〔(【引用サイトリンク】publisher=Securities Exchange Commission )〕 The Speedway SuperAmerica chain of convenience stores was a subsidiary of this now-defunct company. In addition, Marathon Ashland Petroleum owned seven refineries and a number of other pipelines. Following Ashland shareholder and debt-holder approval, the company became fully owned by Marathon Oil on June 30, 2005.〔(【引用サイトリンク】title=Aspects of Marathon's Acquisition of Complete Ownership of the Marathon Ashland Petroleum Joint Venture )〕 The company was renamed Marathon Petroleum Company on September 1, 2005. In 2006, Marathon began using STP-branded additives in its gasoline.〔(【引用サイトリンク】url=http://www.marathonpetroleum.com/brand/Stations_and_Stores/Gasoline_with_STP_Additives/ )〕 On January 13, 2011, Marathon Oil Company announced it would separate completely from Marathon Petroleum Company, creating two independent entities. As a result, Marathon Petroleum Corporation exists as an independent downstream company, with a primary focus on refining, transportation, and marketing. The split was expected by Marathon executives to allow Marathon Petroleum Company to focus more directly on refining, pipeline and marketing portfolio enrichment. The spin-off was completed on July 1, 2011.〔(【引用サイトリンク】title=Marathon spin-off gives Ohio fifth largest refiner )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Marathon Petroleum」の詳細全文を読む スポンサード リンク
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