Stephen Lowry Hayes

Unocal Corp. explores, develops, produces, and markets crude oil and natural gas. The firm also produces geothermal energy in Indonesia and the Philippines and makes petroleum coke, graphite's and silicon carbide materials. The company was founded on October 17, 1890 and is headquartered in El Segundo, CA.

Transocean, Inc. provides offshore contract drilling services for oil and gas wells. It offers engineering and project management services. The firm specializes in deepwater and harsh environment drilling solutions. The company was founded in 1953 and is headquartered in Houston, TX.

Songa Offshore SE engages in the construction, owning and operation of drilling rigs. Its activities include the business of owning and operating offshore drilling rigs and other vessels to be used in the exploration and production of hydrocarbons. The company owns a fleet of semi-submersible rigs, which operate in the mid-water segment and ultra-Deepwater segment. It also acquire and own shares, securities, and ownership interest in other companies. The company was founded in January 2005 and is headquartered in Limassol, Cyprus.

Part of Transocean Ltd., Transocean UK Ltd. engages in the extraction of crude petroleum. The company is based in London, UK.

Part of Transocean Ltd., Triton RIGP DCL Holdco Ltd. is a British company that engages in extracting crude petroleum. The company is based in London, UK and was founded in 2014.

Part of Transocean Ltd., Triton RIGP DD3 Holdco Ltd. provides crude petroleum extraction services. The company is based in London, UK and was founded in 2014.

Part of Transocean Ltd., Triton RIGP DIN Holdco Ltd. is a British company that provides boat charter services. The company is based in London, UK and was founded in 2014.