| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Feb 2024 |
| 2 | A L Jones Revocable Trust | Wilson, OK 73463-7316 | Oil Operator | Jul 2013 |
| 3 | Abarr Trust (The) | Oklahoma City, OK 73123-0084 | Oil & Gas Operator | Feb 2024 |
| 4 | Abercrombie, A. L., Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |
| 5 | Action Petroleum Service Corp | Ardmore, OK 73401-9282 | Oil Operator | Feb 2024 |
| 6 | Aei Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 7 | Afo LLC | Velma, OK 73491-0155 | Oil & Gas Operator | Feb 2024 |
| 8 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2015 |
| 9 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 10 | Allen Michael | Broken Arrow, OK 74014-2239 | Oil & Gas Operator | Dec 2023 |
| 11 | Allen Oil & Gas LLC | | Oil Operator | Aug 2022 |
| 12 | Alligator Rock Well Service LLC | | Oil & Gas Operator | Feb 2024 |
| 13 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Apr 2024 |
| 14 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 15 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2023 |
| 16 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 17 | Americana Energy Inc | Byng, OK 74820-1527 | Oil & Gas Operator | Jan 2024 |
| 18 | Amsito Oil Company LLC | Denton, TX 76206-0689 | Oil Operator | Apr 2001 |
| 19 | Amsito Production Company LLC | | Oil & Gas Operator | Jul 2005 |
| 20 | An-Son Corporation | Oklahoma City, OK 73124-0060 | Oil & Gas Operator | Jan 2006 |
| 21 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 22 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2024 |
| 23 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jan 2024 |
| 24 | Antero Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 25 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 26 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 27 | Apple Petroleum Corp | Mountainside, NJ 7092 | Oil Operator | Mar 2013 |
| 28 | Arbuckle Enterprises, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Jan 2024 |
| 29 | Arcotex Oil & Gas Inc | Gainesville, TX 76241-1357 | Oil & Gas Operator | Feb 2024 |
| 30 | Ardmore Production & Exploration Co | Ardmore, OK 73402-1988 | Oil & Gas Operator | Feb 2024 |
| 31 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Apr 2024 |
| 32 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 33 | Arrow Energy Inc | Houston, TX 77008 | Oil & Gas Operator | Jan 2024 |
| 34 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Apr 2024 |
| 35 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Feb 2015 |
| 36 | Associated Trans & Trading Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 1998 |
| 37 | Atlantic Richfield Company | Plano, TX 75094-1744 | Oil & Gas Operator | Dec 2016 |
| 38 | Auora Natural Gas & Assoc Prod | Dallas, TX 75205 | Oil & Gas Operator | Dec 2000 |
| 39 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 40 | Avalon Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 41 | Aycox Robert D | Healdton, OK 73428-1433 | Oil Operator | Sep 2022 |