| 701 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 702 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Feb 2024 |
| 703 | Wexpro Development Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Feb 2024 |
| 704 | Whitewing Resources LLC | | Oil & Gas Operator | Jun 2014 |
| 705 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 706 | Whittier Energy Company | Farmington, NM 87499 | Oil & Gas Operator | Nov 2002 |
| 707 | Wiepking-Fullerton Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 708 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2024 |
| 709 | Williford Resources LLC | Tulsa, OK 74136-1020 | Oil & Gas Operator | Feb 2024 |
| 710 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2023 |
| 711 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 712 | Winslow Resources Inc | | Oil & Gas Operator | May 2002 |
| 713 | Winter Ridge Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2011 |
| 714 | Wme Yates LLC | | Gas Operator | Dec 2023 |
| 715 | Wofford* William R | | Oil Operator | Jun 2014 |
| 716 | Wold Oil Properties Inc | Denver, CO 80203 | Oil & Gas Operator | Feb 2018 |
| 717 | Wolverine Resources LLC | | Oil & Gas Operator | Feb 2021 |
| 718 | WPX Energy Production LLC | Tulsa, OK 741013102 | Oil & Gas Operator | Nov 2020 |
| 719 | WPX Energy Rocky Mountain LLC | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2024 |
| 720 | WPX Energy Ryan Gulch LLC | | Oil & Gas Operator | Nov 2013 |
| 721 | Wy Woodland Operating, LLC | Covington, TX 76636 | Oil & Gas Operator | Apr 2024 |
| 722 | Wyman* Louis M Dba Wyman Inc | | Oil & Gas Operator | Mar 2024 |
| 723 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 724 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 725 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |