Tesoro Corporation
marketing, logistics and refining company
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.
Tesoro was an independent refiner and marketer of petroleum products, operating ten refineries in the Western United States with a combined rated crude oil capacity of approximately 1,200,000 barrels (190,000 m3) per day. Tesoro's retail-marketing system included approx. 3,000 branded retail gas stations, of which more than 595 were company-operated under its own Tesoro brandname, as well as Shell, ExxonMobil, ARCO, and USA Gasoline brands.
Tesoro, known at the time as Andeavor, was acquired by Marathon Petroleum on October 1, 2018.
History
Tesoro was founded in 1968 by Dr. Robert Van Osdell West Jr (1921–2006), and was primarily engaged in petroleum exploration and production. Tesoro began operating its first refinery, near Kenai, Alaska, in 1969.
“Tesoro Corporation” enters the record as marketing, logistics and refining company. Crown Archives preserves that source wording while asking what Tesoro, Corporation and marketing can confirm, complicate or overturn.
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“Tesoro Corporation” is worth following because a concise public description often conceals a longer documentary argument. Here, Tesoro, Corporation and marketing provides the most credible route into that argument.
Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated Jun 15, 2026. The linked authority identifier is Q2037080. 2 of 2 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 2017, 2018, 1968 and 1921.
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This entry incorporates text from “Tesoro Corporation” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.