Transocean Ltd. is a Swiss company. The company is a leading international provider of offshore contract drilling services for oil and gas wells. As its main business, the company provides contracted drilling services in a single operating segment, which involves contracting mobile offshore rigs, related equipment and staff to drill oil and gas wells. The company focuses on regions with high technical requirements in the global offshore drilling business, with a particular focus on ultra-deepwater and harsh environment drilling services. The company's drilling fleet is one of the most versatile in the world, consisting of drillships and semi-submersible floats to support offshore drilling activities and offshore support services worldwide.