| 601 | White Goat Resources LLC | | Oil & Gas Operator | Feb 2024 |
| 602 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Feb 2024 |
| 603 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 604 | Wil-MC Oil Corporation The | Irving, TX 75015-2510 | Oil & Gas Operator | Mar 1999 |
| 605 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 606 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 607 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2023 |
| 608 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 609 | Wise James W | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 1996 |
| 610 | Wood Fay C Estate | Enid, OK 73703 | Oil & Gas Operator | Jun 2013 |
| 611 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Feb 2024 |
| 612 | Woolsey Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |
| 613 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 614 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Apr 2024 |
| 615 | Young H Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 1993 |
| 616 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2024 |
| 617 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |