Noble Corporation plc operates as an offshore drilling contractor for the oil and gas industry worldwide. The company provides contract drilling services to the oil and gas industry through its fleet of mobile offshore drilling units. It operates drilling rigs, such as floaters and jackups. Noble Corporation plc was founded in 1921 and is headquartered in Sugar Land, Texas.

Valaris Limited, together with its subsidiaries, provides offshore contract drilling services Gulf of Mexico, South America, North Sea, the Middle East, Africa, and the Asia Pacific. The company operates through four segments: Floaters, Jackups, ARO, and Other. It owns an offshore drilling rig fleet, which include drillships, dynamically positioned semisubmersible rigs, moored semisubmersible rig, and jackup rigs. It serves international, government-owned, and independent oil and gas. Valaris Limited was founded in 1975 and is based in Hamilton, Bermuda.

Transocean Ltd., together with its subsidiaries, provides offshore contract drilling services for oil and gas wells worldwide. It contracts mobile offshore drilling rigs, related equipment, and work crews to drill oil and gas wells. The company operates a fleet of mobile offshore drilling units, consisting of ultra-deepwater floaters and harsh environment floaters. It serves integrated energy companies, government-owned or government-controlled energy companies, and other independent energy companies. The company was founded in 1926 and is based in Steinhausen, Switzerland.

SFL Corporation Ltd., a maritime and offshore asset owning and chartering company, engages in the ownership, operation, and chartering out of vessels and offshore related assets on medium and long-term charters. The company operates in various sectors of the maritime, and shipping and offshore industries, including oil transportation, dry bulk shipments, chemical transportation, oil products transportation, container transportation, car transportation, and drilling rigs. As of December 31, 2023, the company owned seven crude oil carriers, six oil product tankers, 15 dry bulk carriers, 32 container vessels, one jack-up drilling rig, one ultra-deepwater drilling rig, and five car carriers. It primarily operates in Bermuda, Canada, Cyprus, Liberia, Namibia, Norway, Singapore, the United Kingdom, and the Marshall Islands. The company was formerly known as Ship Finance International Limited and changed its name to SFL Corporation Ltd. in September 2019. SFL Corporation Ltd. was founded in 2003 and is based in Hamilton, Bermuda.

Borr Drilling Limited operates as an offshore shallow-water drilling contractor to the oil and gas industry worldwide. The company owns, contracts, and operates jack-up drilling rigs for operations in shallow-water areas, including the provision of related equipment and work crews to conduct oil and gas drilling and workover operations for exploration and production. It serves oil and gas exploration and production companies, such as integrated oil companies, state-owned national oil companies, and independent oil and gas companies. The company was formerly known as Magni Drilling Limited and changed its name to Borr Drilling Limited in December 2016. Borr Drilling Limited was incorporated in 2016 and is based in Hamilton, Bermuda.

Nabors Industries Ltd. provides drilling and drilling-related services for land-based and offshore oil and natural gas wells in the United States and internationally. The company operates through four segments: U.S. Drilling, International Drilling, Drilling Solutions, and Rig Technologies. It provides tubular running services, including casing and tubing running, and torque monitoring; managed pressure drilling services; and drilling-bit steering systems and rig instrumentation software. The company also offers drilling systems comprising ROCKit, a directional steering control system; SmartNAV, a collaborative guidance and advisory platform; SmartSLIDE, a directional steering control system; and RigCLOUD, a digital infrastructure to integrate applications to deliver real-time insight into operations across the rig fleet. In addition, it operates a fleet of land-based drilling rigs and marketed platforms rigs; manufactures and sells top drives, catwalks, wrenches, drawworks, and other drilling related equipment, such as robotic systems and downhole tools; and provides aftermarket sales and services for the installed base of its equipment. Nabors Industries Ltd. was founded in 1952 and is based in Hamilton, Bermuda.

SEACOR Marine Holdings Inc. provides marine and support transportation services to offshore oil, natural gas, and windfarm facilities worldwide. Its offshore support and specialty vessels deliver cargo and personnel to offshore installations, including offshore wind farms; handle anchors and mooring equipment for offshore rigs and platforms; assist offshore operations for production and storage facilities; provide construction, well work-over, and offshore wind farm installation and decommissioning support; and carry and launch equipment used underwater in drilling and well installation, maintenance, inspection, and repair, as well as offer accommodations for technicians and specialists, safety support, and emergency response services. As of December 31, 2023, the company operated a fleet of 58 support vessels, of which 55 were owned or leased-in, and three were managed on behalf of unaffiliated third parties. It serves integrated national and international oil companies, independent oil and natural gas exploration and production companies, and oil field service and construction companies, as well as offshore wind farm operators and offshore wind farm installation and maintenance companies. SEACOR Marine Holdings Inc. was founded in 1989 and is headquartered in Houston, Texas.

Diamond Offshore Drilling, Inc. provides contract drilling services to the energy industry worldwide. As of December 31, 2023, the company operated a fleet of 13 offshore drilling rigs, including four drillships, seven semisubmersible rigs, and two managed rigs. It serves independent oil and gas companies, and government-owned oil companies. Diamond Offshore Drilling, Inc. was founded in 1953 and is headquartered in Houston, Texas.