| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Feb 2024 |
| 2 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 3 | Aladdin Energy, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Feb 1999 |
| 4 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 5 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Apr 2024 |
| 6 | Alvarado 2014 LLC | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 7 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 8 | American Domestic MGMT Inc | Tulsa, OK 74155 | Oil & Gas Operator | Apr 2015 |
| 9 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 10 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 11 | Amplify Oklahoma Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 12 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jul 2020 |
| 13 | An-Son Corporation | Oklahoma City, OK 73124-0060 | Oil & Gas Operator | Jan 2006 |
| 14 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 15 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jan 2024 |
| 16 | Ancova Energy Marketing LLC | | Oil & Gas Operator | Jan 2024 |
| 17 | Angel Exploration LLC | Oklahoma City, OK 73116-3603 | Oil & Gas Operator | Feb 2024 |
| 18 | Anr Pipeline Company | Detroit, MI 48243 | Oil & Gas Operator | Dec 2023 |
| 19 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 20 | Antioch Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 21 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 22 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Feb 2024 |
| 23 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Apr 2024 |
| 24 | Arkoma Operations LLC | | Oil & Gas Operator | Jan 2024 |
| 25 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 26 | Arrington David Oil & Gas Inc | Midland, TX 79702-2071 | Oil & Gas Operator | Dec 2014 |
| 27 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Apr 2024 |
| 28 | Arvine Pipe & Supply Co Inc | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2015 |
| 29 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 30 | Atchley Resources Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2024 |
| 31 | Auora Natural Gas & Assoc Prod | Dallas, TX 75205 | Oil & Gas Operator | Dec 2000 |
| 32 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Apr 2024 |
| 33 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 34 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |