| Company Name | Entity type | Parent/Subsidiary/Independent | Headquarters | No. of Employees | Annual Revenue ($M) | |
|---|---|---|---|---|---|---|
| Transocean Ltd | Public | Switzerland | 5,800 | 2,832 | ||
| Deepwater Corrosion Services Inc | Private | Subsidiary (of Acteon Group Ltd ) | United States of America | XYZ | XYZ | |
| Diamond Offshore Drilling Inc | Public | Subsidiary (of Loews Corp) | United States of America | 2,100 | 1,056 | |
| Noble Corporation | Public | Parent | United States of America | 3,600 | 2,589 | |
| Orsted US Offshore Wind | Private | Subsidiary (of Orsted AS ) | United States of America | XYZ | XYZ | |
| Eni Petroleum US LLC | Private | Subsidiary (of Eni SpA ) | United States of America | XYZ | XYZ | |
| W&T Offshore Inc | Public | Parent | United States of America | 395 | 533 | |
| South Fork Wind LLC | Private | Subsidiary (of Orsted AS ) | United States of America | XYZ | XYZ | |
| Seadrill Ltd | Public | Parent | Bermuda | 2,576 | 1,012 | |
| Kosmos Energy Ltd | Public | Parent | United States of America | 243 | 1,702 | |
| Bourbon SA | Private | France | 5,497 | 570 | ||
| Modec Inc | Public | Subsidiary (of Mitsui E&S Co Ltd) | Japan | 5,225 | 2,740 | |
| Oceanteam ASA | Public | Parent | Norway | XYZ | 0 | |
| Hornbeck Offshore Services Inc | Private | Parent | United States of America | 1,157 | XYZ | |
| De Beers Group Plc | Private | Subsidiary (of Anglo American Plc) | Botswana | 20,000 | XYZ | |
| Deepwater Seafood | Private | Independent | United States of America | XYZ | XYZ | |
| DeepWater Buoyancy, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| HEQ Deepwater LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Deepwater EU Ltd | Private | Subsidiary (of Deepwater Corrosion Services Inc ) | United Kingdom | XYZ | XYZ | |
| Deepwater Specialists Inc | Private | Independent | United States of America | XYZ | XYZ | |
| Deepwater Subsea LLC | Private | Subsidiary (of ModuResources EA BV ) | United States of America | XYZ | XYZ | |
| Deepwater Drilling LLC | Private | Subsidiary (of Transocean Ltd ) | United States of America | XYZ | XYZ | |
| Atlantis Deepwater Production Inc | Private | Independent | United States of America | XYZ | XYZ | |
| Highgarden 3-D Deepwater JV | Private | Independent | United States of America | XYZ | XYZ | |
| Atlantis Deepwater Technology Holding AS | Private | Independent | Norway | XYZ | XYZ | |
| Horton Deepwater Development Systems Inc | Private | Subsidiary (of Wison (Nantong) Heavy Industry Co Ltd ) | United States of America | XYZ | XYZ | |
| NNPC Ltd | Private | Parent | Nigeria | XYZ | XYZ | |
| LLOG Deepwater Development Co IV LLC | Private | Independent | United States of America | XYZ | XYZ | |
| The Williams Companies Inc | Public | Parent | United States of America | 5,601 | 10,907 | |
| Vantage Drilling Co | Public | Parent | United Kingdom | XYZ | XYZ | |
| Ocean Rig UDW Inc | Private | Subsidiary (of Transocean Ltd ) | United Kingdom | XYZ | XYZ | |
| Teledyne Technologies Inc | Public | Parent | United States of America | 14,900 | 5,636 | |
| Excelerate Energy Inc | Public | Parent | United States of America | XYZ | XYZ | |
| Oil India Ltd | Public | Joint Venture | India | 6,759 | 5,230 | |
| Callon Petroleum Co | Public | Subsidiary (of APA Corp) | United States of America | 281 | 2,343 | |
| Ocean Rig Partners LP | Private | Independent | Cyprus | XYZ | XYZ | |
| Sevan Drilling ASA | Private | Subsidiary (of Magnora ASA ) | Norway | XYZ | XYZ | |
| SFL Corp Ltd | Public | Parent | Bermuda | 20 | 752 | |
| Cabett Subsea | Private | Independent | United States of America | XYZ | XYZ | |
| Valaris Ltd | Public | Parent | Bermuda | 5,450 | 1,784 | |
| Port of Lake Charles | Private | Independent | United States of America | XYZ | XYZ | |
| Medgaz SA | Private | Independent | Spain | XYZ | XYZ | |
| Horton Technologies Inc | Private | Independent | United States of America | XYZ | XYZ | |
| SeaDrill Invest Ltd | Private | Independent | Bermuda | XYZ | XYZ | |
| Kosmos Energy Mauritania | Private | Subsidiary (of Kosmos Energy Ltd ) | United Kingdom | XYZ | XYZ | |
| Sabre Oil & Gas Holdings Ltd | Private | Independent | Ghana | XYZ | XYZ | |
| Pipe Coaters Nigeria Ltd | Private | Independent | Nigeria | XYZ | XYZ | |
| READ Matre Instruments AS | Private | Independent | Norway | XYZ | XYZ | |
| COSCO (Qidong) Offshore Co Ltd | Private | Subsidiary (of COSCO Shipping Heavy Industry Co Ltd ) | China | XYZ | XYZ | |
| Apus Energia Guinea Bissau SA | Private | Subsidiary (of Apus Energy DMCC ) | Guinea-Bissau | XYZ | XYZ |
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