John Alexander Winton

Part of Valaris Ltd., ENSCO Offshore U.K. Ltd. is a British company that provides oil and gas drilling services. The company is based in London, UK. Founded in 1993.

Part of Valaris Ltd., ENSCO Services Ltd. is a British company that provides support services for petroleum and natural gas extraction. The company is based in London, UK.

Part of Valaris Ltd., ENSCO U.K. Ltd. is a British company that leases drilling rigs. The company is based in London, UK. ENSCO was founded in 2002.

Part of Valaris Ltd., ENSCO Worldwide Investments Ltd. is a holding British company that provides contract drilling services through its subsidiaries. The company is based in London, UK.

Part of Valaris Ltd., ENSCO Finance Ltd. is a holding British company that provides contract drilling services through its subsidiaries. The company is based in London, UK and was founded in 2009.

Part of Valaris Ltd., Ensco Deepwater Drilling Ltd. is a holding British company that provides drilling services to the offshore oil and gas industry. The company is based in London, UK and was founded in 2013.

Part of Valaris Ltd., ENSCO Global Resources Ltd. is a British company that provides contract drilling services to the offshore oil and gas industries. The company is based in London, UK.

Part of Valaris Ltd., Alpha Offshore International Leasing Ltd. is a British company that leases oil and gas drilling machinery and equipment. The company is based in London, UK and was founded in 2010.

Part of Valaris Ltd., ENSCO Universal Ltd. is a British company that provides contract drilling services to the offshore oil and gas industry. The company is based in London, UK and was founded in 2009.

Part of Valaris Ltd., ENSCO Offshore International Holdings Ltd. operates as a Caymanian financing company. The company is based in George Town, Cayman Islands.

Part of Valaris Ltd., Pride Foramer SAS is a drilling and surveying French company founded in 2011. The company is based in Lescar, France and engages in drilling and surveys.

Part of Valaris Ltd., Rowan Drilling (U.K.) Ltd. is a British company that provides well drilling services. The company is based in Aberdeen, UK and was founded in 1977.