| 1 | W C S Inc | Pottsboro, TX 75076 | Oil & Gas Operator | Oct 2019 |
| 2 | W F D Oil Corp. | Edmond, OK 73012 | Oil & Gas Operator | Jan 2026 |
| 3 | Waggoner Oil & Gas Corp | Enid, OK 73703-1152 | Oil & Gas Operator | Jan 2026 |
| 4 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2026 |
| 5 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 6 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Dec 2025 |
| 7 | Watkins J L | Henryetta, OK 74437 | Oil & Gas Operator | Jan 2026 |
| 8 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Dec 2025 |
| 9 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Jan 2026 |
| 10 | Western Division Investments Inc | Enid, OK 73701 | Oil & Gas Operator | Jul 2021 |
| 11 | Western Mountain Resources LLC | Cogan Station, PA 17728 | Oil & Gas Operator | Dec 2025 |
| 12 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jan 2026 |
| 13 | White Goat Resources LLC | Yukon, OK 73099 | Oil & Gas Operator | Jan 2026 |
| 14 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Jan 2026 |
| 15 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 16 | Wil-MC Oil Corporation The | Irving, TX 75015-2510 | Oil & Gas Operator | Mar 1999 |
| 17 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 18 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 19 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Sep 2025 |
| 20 | Wise James W | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 1996 |
| 21 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jan 2026 |
| 22 | Wood Fay C Estate | Enid, OK 73703 | Oil & Gas Operator | Jun 2013 |
| 23 | Woolsey Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |