| 1 | Abarta Oil & Gas Co., Inc. | Pittsburgh, PA 15238 | Oil & Gas Operator | Dec 2020 |
| 2 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Oct 2025 |
| 3 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 4 | Admiral Permian Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 5 | Adventure Exploration PTRS, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2012 |
| 6 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 7 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 8 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Oct 2025 |
| 9 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | May 2025 |
| 10 | Aj'S Pump Truck Service, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Oct 2025 |
| 11 | Ajax Resources, LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 12 | Alleder Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 13 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 14 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 15 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 16 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 17 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 18 | Americo Energy Resources, LLC | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 19 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 20 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 21 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 22 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 23 | Andector Exploration Company | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 24 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 25 | Anthony, Bob G. Inc. | Brookhaven, MS 39601 | Oil & Gas Operator | Oct 2025 |
| 26 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 27 | Apex Royalties, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 1997 |
| 28 | Aratex Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2003 |
| 29 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Oct 2025 |
| 30 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 31 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 32 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 33 | Ard Drilling Company Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2000 |
| 34 | Ares Energy, LTD. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 35 | Argus Drilling, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 36 | Armstrong Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Jul 2025 |
| 37 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 38 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 39 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Jun 2025 |
| 40 | Ary, J. Kirk | Midland, TX 79708 | Oil & Gas Operator | Jun 1993 |
| 41 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 42 | Aspen Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 43 | Aspen Land & Exploration Co | Tulsa, OK 74159-0335 | Oil & Gas Operator | Jul 2001 |
| 44 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 45 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 46 | Athlon Energy Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 47 | Athlon Holdings LP | Denver, CO 80202 | Oil & Gas Operator | Jan 2015 |
| 48 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 49 | Ausland Production Company | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 50 | Autumn Energy LLC | Andrews, TX 79714 | Oil Operator | Aug 2017 |
| 51 | Autumn Energy Operating | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 52 | Avalon TX Operating, LLC | Andrews, TX 79714 | Oil & Gas Operator | Jan 2023 |
| 53 | Avid Energy Assets LLC | Midland, TX 79708 | Oil & Gas Operator | Oct 2025 |