Strong leadership, state-of-the-art refineries, a network of gasoline and convenience store outlets, and a customer-focused team of dedicated employees has positioned Ultramar Diamond Shamrock Corporation as one of North America’s leading refiners and marketers.
Ultramar Diamond Shamrock was formed as an independent corporation on December 3, 1996, following the merger of Diamond Shamrock, Inc. and Ultramar Corporation.
The company owns and operates four of North America's most efficient refineries, which offer a total throughput capacity of 465,000 barrels per day (BPD). Two of the refineries are located in Texas, with one each in California and Quebec. All operate at near capacity levels, producing quality gasoline, diesel, jet fuel, and petroleum products.
Ultramar Diamond Shamrock has a strong network of approximately 4,400 locations in 10 Southwestern states and eastern Canada. Approximately 2,700 outlets are branded as Diamond Shamrock, of which 1,500 are company-operated Corner Stores in Arizona, Colorado, Louisiana, New Mexico and Texas, and Stop N Go locations in Texas. The remaining outlets are owned and operated by jobbers in nine states.
The company also has 350 locations under the Ultramar and Beacon brands in California, of which 150 are company-owned and operated. Ultramar Diamond Shamrock’s Eastern Canadian retail network includes 1,330 locations under the Ultramar and Sergaz brands. Approximately 630 of these are company-owned or controlled under long-term lease and 110 locations have convenience stores.
More than 4,000 miles of crude oil and refined products pipelines and 15 products terminals link the company to its Southwest markets.
While refining and marketing make up our core businesses, Ultramar Diamond Shamrock operates a number of additional related businesses, including petrochemical processing, anhydrous ammonia, and natural gas liquids storage, marketing, and distribution. The company is also one of the largest retail home heating oil companies in North America, selling the product to over 175,000 households in Eastern Canada and New England.
Headquartered in San Antonio, Texas, Diamond Shamrock is an equal opportunity employer with approximately 17,000 people in 10 states and Canada. Our stock is traded on the New York Stock Exchange under the trading symbol UDS.
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