| 1 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 2 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 3 | Cascade Petroleum LLC | | Oil & Gas Operator | Nov 2015 |
| 4 | Churchill Energy Inc | | Oil & Gas Operator | Sep 2020 |
| 5 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 6 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 7 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 8 | Grand Mesa Operating Co | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 9 | Grynberg* Jack Dba Grynberg Petroleum Co | | Oil & Gas Operator | Jan 2023 |
| 10 | Halde Oil Inc | | Oil & Gas Operator | Jul 2025 |
| 11 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 12 | JWC Operating LLC | | Oil & Gas Operator | Jul 2025 |
| 13 | KTM Operating LLC | | Oil & Gas Operator | Jun 2025 |
| 14 | Magpie Operating, Inc | | Oil & Gas Operator | Jul 2025 |
| 15 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 16 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 17 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Aug 2025 |
| 18 | Newfield Production Company | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jul 2022 |
| 19 | Nighthawk Production LLC | | Oil & Gas Operator | Jun 2018 |
| 20 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jul 2025 |
| 21 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 22 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 23 | Pine Ridge Oil & Gas LLC | | Oil & Gas Operator | Jul 2015 |
| 24 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Jun 2025 |
| 25 | Polaris Production Opco LLC | | Oil & Gas Operator | Jul 2025 |
| 26 | Pronghorn Operating LLC | | Oil Operator | Jan 2023 |
| 27 | Rampike Resources LTD | Denver, CO 80202 | Oil Operator | Jul 2025 |
| 28 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 29 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 30 | Running Foxes Petroleum Inc. | Centennial, CO 80112 | Oil & Gas Operator | Jun 2025 |
| 31 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 32 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2025 |
| 33 | Vecta Oil & Gas LTD | Dallas, TX 75235 | Oil & Gas Operator | Jul 2025 |
| 34 | Wiepking-Fullerton Energy LLC | | Oil & Gas Operator | Jul 2025 |