| 1 | A & G Producers, Inc. | Barstow, TX 79719 | Oil & Gas Operator | Dec 2025 |
| 2 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 3 | Ace Energy LLC | Leawood, KS 66211 | Oil & Gas Operator | Oct 2025 |
| 4 | Adventure Exploration PTRS, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2012 |
| 5 | Aeternum Energy, LLC | Tyler, TX 75713 | Oil & Gas Operator | Dec 2025 |
| 6 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2025 |
| 7 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 8 | Alpha Petrovision Us Inc | Canada, 00100 | Oil & Gas Operator | May 2013 |
| 9 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 10 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 11 | Amax Oil & Gas Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 12 | American Energy-Perm Basin, LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | May 2016 |
| 13 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 14 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 15 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 16 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 17 | Anadarko Ogc Company | Houston, TX 77251 | Oil & Gas Operator | Dec 1998 |
| 18 | Andector Exploration Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 19 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 20 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 21 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Dec 2025 |
| 22 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Dec 2025 |
| 23 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 24 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 25 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 26 | Area Pipe And Equipment | Midland, TX 79702 | Oil & Gas Operator | Apr 2003 |
| 27 | Arena Production Company | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 28 | Arete Creek Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 29 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2009 |
| 30 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 31 | Arkland, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 32 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 33 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 34 | Aspen Land & Exploration Co | Tulsa, OK 74159-0335 | Oil & Gas Operator | Jul 2001 |
| 35 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2025 |
| 36 | Athlon Energy Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 37 | Athlon Fe Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2015 |
| 38 | Athlon Holdings LP | Denver, CO 80202 | Oil & Gas Operator | Jan 2015 |
| 39 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 40 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |