| 1 | W C S Inc | Pottsboro, TX 75076-1167 | Oil & Gas Operator | Oct 2019 |
| 2 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 3 | Waggoner Oil & Gas Corp | Enid, OK 73703-1152 | Oil & Gas Operator | Mar 2024 |
| 4 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2024 |
| 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 | Feb 2024 |
| 7 | Watkins J L | Morris, OK 74445-0325 | Oil & Gas Operator | Mar 2024 |
| 8 | Wellco Energy Inc | Oklahoma City, OK 73113-0130 | Oil & Gas Operator | Feb 2024 |
| 9 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Apr 2024 |
| 10 | Western Division Investments Inc | Enid, OK 73701 | Oil & Gas Operator | Jul 2021 |
| 11 | Western Gas Resources Inc | Denver, CO 80202-1955 | Oil & Gas Operator | Dec 2007 |
| 12 | Western Mountain Resources LLC | | Oil & Gas Operator | Feb 2024 |
| 13 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Mar 2024 |
| 14 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2024 |
| 15 | WFD Oil Corporation | Edmond, OK 73012-0619 | Oil & Gas Operator | Mar 2024 |
| 16 | White Goat Resources LLC | | Oil & Gas Operator | Mar 2024 |
| 17 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Mar 2024 |
| 18 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 19 | Wil-MC Oil Corporation The | Irving, TX 75015-2510 | Oil & Gas Operator | Mar 1999 |
| 20 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 21 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 22 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Jan 2024 |
| 23 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 24 | Wise James W | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 1996 |
| 25 | Wood Fay C Estate | Enid, OK 73703 | Oil & Gas Operator | Jun 2013 |
| 26 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Mar 2024 |
| 27 | Woolsey Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2024 |