| 701 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 702 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 703 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 704 | Wible Limited Liability Co | Edmond, OK 73012 | Oil Operator | Oct 2024 |
| 705 | Wild Outdoors Oil LLC | Velma, OK 73491 | Oil & Gas Operator | Mar 2026 |
| 706 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 707 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Jun 2026 |
| 708 | Williams Jack W | Ardmore, OK 73401-4726 | Oil Operator | Feb 2017 |
| 709 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Feb 2026 |
| 710 | Williams Royce S | Healdton, OK 73438-0306 | Oil & Gas Operator | Apr 2014 |
| 711 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2026 |
| 712 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Jun 2026 |
| 713 | Williford Resources LLC | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2026 |
| 714 | Wilson Salt Water Disposal Inc | | Oil Operator | Aug 2019 |
| 715 | Wilson Well Service | Loco, OK 73442-0114 | Oil & Gas Operator | Mar 2018 |
| 716 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 717 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 718 | Wishbone Oil & Gas | Noble, OK 73068 | Oil & Gas Operator | Mar 2007 |
| 719 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Jun 2026 |
| 720 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2026 |
| 721 | Wright Richard | Ratliff City, OK 73481-0155 | Oil & Gas Operator | Mar 2015 |
| 722 | Wylie Henry C | Ratliff City, OK 73481-0102 | Oil Operator | May 2020 |
| 723 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |
| 724 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Mar 2026 |
| 725 | Zim Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Jan 1998 |
| 726 | ZP Disposal Systems LLC | Kingfisher, OK 73750 | Oil Operator | Mar 2026 |
| 727 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |