| 1 | Black Hills Plateau Production LLC | | Gas Operator | Sep 2016 |
| 2 | Caerus Piceance LLC | | Oil & Gas Operator | Sep 2025 |
| 3 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 4 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 5 | Diamond Oil And Gas, Inc. | Kalamazoo, MI 49001 | Oil & Gas Operator | Apr 2026 |
| 6 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 7 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 8 | Fees Jr And Son Oil & Gas* Walter S | | Oil & Gas Operator | Jan 2026 |
| 9 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2026 |
| 10 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 11 | Lasso Oil & Gas LLC | | Oil & Gas Operator | Jul 2022 |
| 12 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Apr 2026 |
| 13 | Lone Mountain Production Company | | Oil & Gas Operator | Jan 2016 |
| 14 | Mustang Resources LLC | Houston, TX 77046 | Oil & Gas Operator | Jan 2026 |
| 15 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 16 | Nonsuch Natural Gas Inc | Naples, FL 34108 | Oil & Gas Operator | Feb 2026 |
| 17 | Northstar Gas Company, Inc. | | Oil & Gas Operator | Jan 2016 |
| 18 | Orion Energy Partners LP | Denver, CO 80202 | Oil & Gas Operator | Nov 2010 |
| 19 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 20 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 21 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Jan 2026 |
| 22 | Petro Mex Resources | | Oil & Gas Operator | Jan 2026 |
| 23 | Piceance Energy LLC | | Oil & Gas Operator | Feb 2026 |
| 24 | Pre Resources Inc | | Oil & Gas Operator | Jul 2016 |
| 25 | Puckett Land Company | | Oil & Gas Operator | Dec 2020 |
| 26 | QB Energy Operating LLC | | Oil & Gas Operator | Jan 2026 |
| 27 | Swevco-Sabw LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2026 |
| 28 | Timberline Energy Inc | Franklin, PA 16323-0269 | Oil & Gas Operator | Dec 2025 |
| 29 | Vision Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2026 |
| 30 | Vitruvian Exploration LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2016 |
| 31 | WPX Energy Rocky Mountain LLC | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2026 |