| 101 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2026 |
| 102 | Stephens Energy Company LLC | | Oil & Gas Operator | Feb 2010 |
| 103 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 104 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 105 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 106 | Thunderbird Resources LP | | Oil & Gas Operator | Apr 2019 |
| 107 | Upton Resources U.S.A. Inc. | | Oil & Gas Operator | Oct 2013 |
| 108 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 109 | W. H. Hunt Trust Estate | | Oil & Gas Operator | Mar 1997 |
| 110 | Wesco Operating Inc | Casper, WY 82602 | Oil & Gas Operator | Feb 2026 |
| 111 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 112 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Apr 2026 |
| 113 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 114 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 115 | Williston Industrial Supply Corporation | Williston, ND 58801 | Oil & Gas Operator | Mar 2012 |
| 116 | WPX Energy Williston, LLC | | Oil & Gas Operator | Sep 2025 |
| 117 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 118 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 119 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |