| 401 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 402 | Transcoastal Operating LLC | Dallas, TX 75252-5646 | Oil & Gas Operator | Mar 2015 |
| 403 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 404 | Triple S Drilling Company | Leonard, OK 74043 | Oil & Gas Operator | Feb 2012 |
| 405 | Truckers Disposal Inc | Skiatook, OK 74070 | Oil & Gas Operator | Feb 2026 |
| 406 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Feb 2026 |
| 407 | Vaco Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2003 |
| 408 | W F D Oil Corp. | Edmond, OK 73012 | Oil & Gas Operator | Jan 2026 |
| 409 | W P Oil & Gas LLC | Coweta, OK 74429-5465 | Oil & Gas Operator | Mar 2015 |
| 410 | Wachob Oil & Gas LLC | Sapulpa, OK 74066-6987 | Oil Operator | Jun 2015 |
| 411 | Walgann Oil & Gas Inc | Sperry, OK 74073 | Oil Operator | Feb 2026 |
| 412 | Warpath Energy Inc | Broken Arrow, OK 74014-1118 | Oil & Gas Operator | Apr 2018 |
| 413 | Weins Horton L | Sand Springs, OK 74063 | Oil & Gas Operator | Jan 2026 |
| 414 | Wells Allen W | Barnsdall, OK 74002 | Oil & Gas Operator | Feb 2026 |
| 415 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 416 | Westfall-Gooden Reserves LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Jan 2026 |
| 417 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 418 | Wheeler & Hanlin MFG Co Inc | Tulsa, OK 74148 | Oil Operator | Jun 1998 |
| 419 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | Dec 2025 |
| 420 | White Clarence A | Lawton, OK 73505-4927 | Oil & Gas Operator | Jan 2026 |
| 421 | White Mike Oil Field Service | Edmond, OK 73034 | Oil & Gas Operator | Jan 2013 |
| 422 | Whiteman Industries Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | May 2025 |
| 423 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 424 | Williamson Gregory L | Skiatook, OK 74070-0028 | Oil & Gas Operator | Mar 2015 |
| 425 | Williamson Ozella | Skiatook, OK 74070 | Oil Operator | Aug 2013 |
| 426 | Wilson H Drew | Collinsville, OK 74021 | Oil Operator | Feb 2026 |
| 427 | Worstell Michael H | Collinsville, OK 74021-5918 | Oil Operator | Mar 2015 |
| 428 | Worstell Oil & Gas Company | Collinsville, OK 74021 | Oil Operator | Nov 2005 |
| 429 | Worstell Oil Co LLC | Collinsville, OK 74021-5918 | Oil Operator | Dec 2025 |
| 430 | WP Oil LLC | Owasso, OK 74055 | Oil Operator | Feb 2026 |
| 431 | Wright Katherine E | Tulsa, OK 74114-1229 | Oil Operator | Sep 2019 |
| 432 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Feb 2026 |
| 433 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Feb 2026 |
| 434 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |