Shell USA, Inc. (formerly Shell Oil Company, Inc.) is the United States-based wholly owned subsidiary of Shell plc, a UK-based transnational corporation "oil major" which is amongst the largest oil companies in the world. Approximately 18,000 Shell employees are based in the U.S. Its U.S. headquarters are in Houston, Texas. Shell USA, including its consolidated companies and its share in equity companies, is one of America's largest oil and natural gas producers, natural gas marketers, fuel marketers and petrochemical manufacturers.
In 1997, Shell and Texaco entered into two refining/marketing joint ventures. One combined their Midwestern and Western operations and was known as Equilon. The other, known as Motiva Enterprises, combined the Eastern and Gulf Coast operations of Shell Oil and Star Enterprise, itself a joint venture between Saudi Aramco and Texaco.
After Texaco merged with Chevron in 2001, Shell purchased Texaco's shares in the joint ventures. In 2002, Shell began converting these Texaco stations to the Shell brand, a process that was to be completed by June 2004 and was called "the largest retail re-branding initiative in American business history". In the year 2016, Shell Nederland Raffinaderij BV (Shell Pernis) said that it has started a new aromatics unit at the large Pernis refinery in Rotterdam, Netherlands.
In recent years The Shell Oil Company's Midstream, and Downstream, in particular, have become limited to petroleum, and chemical products. This has come as a result of Royal Dutch Shell breaking off its Natural Gas and power businesses into a new segment named Integrated Gas. The Shell Oil Company's former Natural Gas, and energy divisions are now Shell Energy North America, a closely integrated, but a distinctive entity that runs across North America and is headquartered out of Houston, Texas.
Shell is the market leader through approximately 14,000 Shell-branded fuel stations in the U.S. which also serve as Shell's most visible public presence, and comes closest to serving all 50 states, lacking a presence only in Montana.