| 1 | A.O.E. Operators, Inc. | Fulshear, TX 77441 | Oil & Gas Operator | Sep 2025 |
| 2 | Ableready, Inc. | Houston, TX 77269 | Oil & Gas Operator | Sep 2025 |
| 3 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Sep 2025 |
| 4 | Adventure Operating Company, LLC | Midland, TX 79702 | Oil & Gas Operator | Jan 2021 |
| 5 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 6 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Sep 2025 |
| 7 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2025 |
| 8 | Alleder Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 9 | Alps Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Aug 1999 |
| 10 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 11 | Alto Minerals, Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2019 |
| 12 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 13 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 14 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 15 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 16 | Ammonite Energy Texas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Aug 2003 |
| 17 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 18 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 19 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2025 |
| 20 | Andector Exploration Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 21 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 22 | Antelope Production Co. | Midland, TX 79701 | Oil & Gas Operator | Oct 1995 |
| 23 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 24 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 25 | Apex Royalties, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 1997 |
| 26 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2025 |
| 27 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Sep 2025 |
| 28 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 29 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 30 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 31 | Ares Energy, LTD. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 32 | Arete Creek Operating, LLC | Midland, TX 79703 | Oil & Gas Operator | Sep 2025 |
| 33 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2025 |
| 34 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 35 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 36 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 37 | Athlon Holdings LP | Denver, CO 80202 | Oil & Gas Operator | Jan 2015 |
| 38 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |
| 39 | Ausland Production Company | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 40 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Sep 2025 |