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.

Oceaneering International, Inc. provides engineered services and products, and robotic solutions to the offshore energy, defense, aerospace, manufacturing, and entertainment industries worldwide. It operates through Subsea Robotics, Manufactured Products, Offshore Projects Group, Integrity Management & Digital Solutions, and Aerospace and Defense Technologies segments. The company offers remotely operated vehicles (ROVs) for drill support and vessel-based services, including subsea hardware installation, construction, pipeline inspection, survey and facilities inspection, maintenance, and repair; ROV tooling; and survey services, such as hydrographic survey, positioning services, and autonomous underwater vehicles for geoscience. It also provides distribution and connection systems, including production control umbilicals and field development hardware, pipeline connection, and repair systems to the energy industry; and autonomous mobile robotic technology and entertainment systems to various industries. In addition, the company offers subsea installation and intervention, including riserless light well intervention inspection, maintenance, and repair services; installation and workover control systems, and ROV workover control systems; diving services; project management and engineering; and drill pipe riser services and systems, and wellhead load relief solutions. Further, it provides asset integrity management, software and analytical solutions for the bulk cargo maritime industry, and software, digital, and connectivity solutions for the energy industry, as well as government services and products, including engineering and related manufacturing in defense and space exploration activities to the United States' government agencies and their prime contractors. Oceaneering International, Inc. was founded in 1964 and is headquartered in Houston, Texas.

Expro Group Holdings N.V. engages in the provision of energy services in North and Latin America, Europe and Sub-Saharan Africa, the Middle East and North Africa, and the Asia-Pacific. The company provides well construction services, such as technology solutions in drilling, tubular running services, and cementing and tubulars; and well management services, including well flow management, subsea well access, and well intervention and integrity solutions. It serves exploration and production companies in onshore and offshore environments in approximately 60 countries. Expro Group Holdings N.V. was founded in 1938 and is based in Houston, Texas.

Helix Energy Solutions Group, Inc., together with its subsidiaries, an offshore energy services company, provides specialty services to the offshore energy industry in Brazil, the Gulf of Mexico, the East Coast of the United States, North Sea, the Asia Pacific, and West Africa regions. The company operates through four segments: Well Intervention, Robotics, Production Facilities, and Shallow Water Abandonment segments. It engages in the installation of flowlines, control umbilicals, and manifold assemblies and risers; trenching and burial of pipelines; installation and tie-in of riser and manifold assembly; commissioning, testing, and inspection activities; and provision of cable and umbilical lay, and connection services. The company also provides well intervention, intervention engineering, and production enhancement services; coiled tubing operations; inspection, repair, and maintenance of production structures, trees, jumpers, risers, pipelines, and subsea equipment; and related support services. In addition, it offers reclamation and remediation services; well plug and abandonment services; pipeline, cable and umbilical abandonment services; and site inspections. Additionally, the company offers oil and natural gas processing facilities and services; and fast response system, as well as site clearance and subsea support services. Further, it provides offshore oilfield decommissioning and reclamation, project management, engineered solutions, intervention, maintenance, repair, heavy lift, and commercial diving services. It serves independent oil and gas producers and suppliers, pipeline transmission companies, renewable energy companies, and offshore engineering and construction firms. The company was formerly known as Cal Dive International, Inc. and changed its name to Helix Energy Solutions Group, Inc. in March 2006. Helix Energy Solutions Group, Inc. was incorporated in 1979 and is headquartered in Houston, Texas.

Oil States International, Inc., through its subsidiaries, provides engineered capital equipment and products for the energy, industrial, and military sectors worldwide. The company operates through three segments: Well Site Services, Downhole Technologies, and Offshore/Manufactured Products. The Well Site Services segment offers a range of equipment and services that are used to drill for, establish, and maintain the flow of oil and natural gas from a well throughout its lifecycle. It also provides wireline support, frac stacks, isolation tools, downhole and extended reach activity, well testing and flowback operations, sand control, and land drilling services. The Downhole Technologies segment provides oil and gas perforation systems, and downhole tools in support of completion, intervention, wireline, and well abandonment operations. This segment also designs, manufactures, and markets its consumable engineered products to oilfield service, and exploration and production companies. The Offshore/Manufactured Products segment designs, manufactures, and markets capital equipment utilized on floating production systems, subsea pipeline infrastructure, and offshore drilling rigs and vessels. Its products include flexible bearings, advanced connector systems, high-pressure riser systems, managed pressure drilling systems, deepwater mooring systems, cranes, subsea pipeline products, and blow-out preventer stack integration products. This segment also provides short-cycle products, such as valves, elastomers, and other specialty products that are used in the land-based drilling and completion markets; and other products for use in industrial, military, alternative energy, and other applications. In addition, it offers specialty welding, fabrication, cladding and machining, offshore installation, and inspection and repair services. The company was incorporated in 1995 and is headquartered in Houston, Texas.

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.

Gulf Island Fabrication, Inc., together with its subsidiaries, operates as a fabricator of steel structures and modules in the United States. It operates through Services, Fabrication, and Shipyard divisions. The company provides maintenance, repair, construction, scaffolding, coatings, welding enclosures, and other specialty services on offshore platforms, inland structures, and industrial facilities; services required to connect production equipment and service modules, and equipment on offshore platforms; project management and commissioning services; hookup services; and civil construction and staffing services to the industrial and energy sectors, as well as undertakes municipal and drainage projects, including pump stations, levee reinforcement, bulkheads, and other public works. It also fabricates modules, skids, and piping systems for onshore refining, petrochemical, liquified natural gas (LNG), industrial, and offshore facilities; foundations, secondary steel components, and support structures for alternative energy developments and coastal mooring facilities; offshore production platforms and associated structures, including jacket foundations, piles, and topsides for fixed production and utility platforms, as well as hulls and topsides for floating production and utility platforms; and other complex steel structures and components. In addition, the company fabricates newbuild marine vessels and provides marine repair and maintenance services. The company serves international energy producers; refining, petrochemical, LNG, industrial, and power operators; and engineering, procurement, and construction companies. Gulf Island Fabrication, Inc. was incorporated in 1985 and is headquartered in The Woodlands, 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.