| 1 | W M Energy Corp | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2015 |
| 2 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 3 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jun 2025 |
| 4 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Oct 2025 |
| 5 | Wedgewood Resources USA Inc | Vancouver, BC V6B1V-9000 | Oil & Gas Operator | Jul 2003 |
| 6 | Welch Family Trust | Ada, OK 74820-9643 | Oil & Gas Operator | Apr 2015 |
| 7 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Jun 2025 |
| 8 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 9 | Western Mountain Resources LLC | Cogan Station, PA 17728 | Oil & Gas Operator | Jun 2025 |
| 10 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Jul 2025 |
| 11 | WFD Oil Corporation | Edmond, OK 73012 | Oil & Gas Operator | Jun 2025 |
| 12 | White Goat Resources LLC | Yukon, OK 73099 | Oil & Gas Operator | Jul 2025 |
| 13 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 14 | White Star Petroleum LLC | Oklahoma City, OK 73116-7906 | Oil & Gas Operator | Jun 2025 |
| 15 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 16 | Wil-MC Oil Corporation The | Irving, TX 75015-2510 | Oil & Gas Operator | Mar 1999 |
| 17 | Wil-Ron Inc | Lucien, OK 73757-9710 | Oil & Gas Operator | May 2025 |
| 18 | Wilco Oil & Gas Corporation | Oklahoma City, OK 73159-6229 | Oil & Gas Operator | Dec 2023 |
| 19 | Williams M H | Red Rock, OK 74651-0311 | Oil & Gas Operator | May 2023 |
| 20 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Jun 2025 |
| 21 | Wood Fay C Estate | Enid, OK 73703 | Oil & Gas Operator | Jun 2013 |
| 22 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 23 | Wroten Wiley Jr | Dallas, TX 75252 | Oil & Gas Operator | Jun 1994 |