| 1 | A H & L Operating Company Inc | Norman, OK 73070-4084 | Oil & Gas Operator | Apr 2015 |
| 2 | Aaa Oil & Gas Inc | Pauls Valley, OK 73075-0863 | Oil Operator | Mar 2000 |
| 3 | Aaron Oil Company | Shawnee, OK 74801-2321 | Oil Operator | Oct 2022 |
| 4 | ABC Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2023 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Dec 2024 |
| 6 | Abundance Energy LLC | Bartlesville, OK 74005-1087 | Oil & Gas Operator | Jul 2018 |
| 7 | Acelco Inc | Norman, OK 73070 | Oil & Gas Operator | Oct 1996 |
| 8 | Ada Energy Exploration And Production LLC | Ada, OK 74820-0867 | Oil Operator | Sep 2024 |
| 9 | Adventure Properties Inc | Ada, OK 74820 | Oil & Gas Operator | Sep 2024 |
| 10 | Aei Corporation-Oklahoma | Oklahoma City, OK 73101-1945 | Oil & Gas Operator | Sep 2014 |
| 11 | Aei Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 12 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2015 |
| 13 | Aker Oil & Gas Company | Tulsa, OK 74105-2216 | Oil & Gas Operator | Aug 2013 |
| 14 | Alamo Resources Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 15 | Alda Oil & Gas Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2004 |
| 16 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 17 | Allen Oil & Gas LLC | Ardmore, OK 73401 | Oil Operator | Aug 2022 |
| 18 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Feb 2024 |
| 19 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Mar 2015 |
| 20 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Dec 2024 |
| 21 | American Natural Resources LLC | Tulsa, OK 74145-1117 | Oil & Gas Operator | May 2020 |
| 22 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Sep 2024 |
| 23 | American Petroleum & Mineral Co Inc | Seminole, OK 74868 | Oil & Gas Operator | Aug 2019 |
| 24 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 25 | Americana Energy Inc | Byng, OK 74820 | Oil & Gas Operator | Sep 2024 |
| 26 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 27 | Ameritech Oil & Gas Corporation | Dallas, TX 75248 | Oil & Gas Operator | May 1996 |
| 28 | Amerroyal Energy LLC | Shawnee, OK 74804-4163 | Oil & Gas Operator | Dec 2022 |
| 29 | Andress Bill O | Tulsa, OK 74135-3553 | Oil & Gas Operator | Sep 2003 |
| 30 | Anson Charles Dba Anson Oil | Seminole, OK 74868 | Oil Operator | Sep 2024 |
| 31 | Anson J W | Seminole, OK 74818-1280 | Oil & Gas Operator | Oct 2020 |
| 32 | Anvil Oil Co., Inc. | Bartlesville, OK 74003-5030 | Oil & Gas Operator | Dec 2008 |
| 33 | Archibald Oil & Gas Operating Inc | Ada, OK 74820 | Oil & Gas Operator | Oct 2024 |
| 34 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 35 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2024 |
| 36 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2019 |
| 37 | Arnold Oil Properties, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2024 |
| 38 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Sep 2024 |
| 39 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 2024 |
| 40 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Oct 2024 |
| 41 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 2024 |
| 42 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Dec 2024 |
| 43 | Associated Trans & Trading Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 1998 |
| 44 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 45 | Atlas Oil Inc | Oklahoma City, OK 73154-0467 | Oil & Gas Operator | Aug 2008 |
| 46 | Avatar Energy LLC | Dallas, TX 75220-2230 | Oil & Gas Operator | Jul 2016 |