Santos is an Australian-based oil and gas company with its headquarters located in Adelaide, Australia. Founded in 1954, Santos is engaged in oil and gas exploration and production. Santos is one of Australia's largest gas producers and supplies gas to all parts of Australia and also supplies international markets. The company is active in oil and gas exploration and production throughout Australia, in the Timor Gap, Indonesia, Papua New Guinea, India, Bangladesh, Egypt, Vietnam and Kyrgyzstan. STO offers both American and European style options.