| 1 | Abilene Perfect Energy JV LLC | | Oil & Gas Operator | Dec 2017 |
| 2 | Abundance Energy Services LLC | Tulsa, OK 74114 | Gas Operator | Jan 2026 |
| 3 | Advanced Wireless Communications, L.L.C. | Farmington, NM 87401 | Oil & Gas Operator | Feb 2026 |
| 4 | Advantage Resources Inc | Broomfield, CO 80020 | Oil & Gas Operator | Dec 2025 |
| 5 | Aeon Energy Corp. | | Oil & Gas Operator | Mar 2026 |
| 6 | Alamosa Drilling Inc | Dallas, TX 75206-1841 | Oil & Gas Operator | Apr 2024 |
| 7 | Alan Howard Karchmer Living Trust | | Oil Operator | Dec 2022 |
| 8 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Apr 2026 |
| 9 | American Helium LLC | | Oil & Gas Operator | Nov 2025 |
| 10 | American Petroleum Energy Co | | Gas Operator | Jan 2026 |
| 11 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 12 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 13 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 14 | Antler Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Aug 2025 |
| 15 | Apex Oil Ventures Inc | | Oil & Gas Operator | Jan 2026 |
| 16 | Arch Oil & Gas, LLC | Ennis, TX 75119 | Oil & Gas Operator | Apr 2026 |
| 17 | Argali Exploration Company | | Oil & Gas Operator | Aug 2025 |
| 18 | Argonex Company LLC | | Oil & Gas Operator | Jan 2024 |
| 19 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Jan 2026 |
| 20 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2026 |
| 21 | Aurora Power Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Aug 2018 |
| 22 | Aus-Tex Exploration, Inc | | Oil & Gas Operator | Jan 2026 |
| 23 | Ausmus & Clark Oil | | Oil Operator | Jul 2022 |
| 24 | Axis Exploration LLC | | Oil & Gas Operator | Jan 2026 |