| 1 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 2 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Nov 2025 |
| 3 | Ad Astra Resources LLC | Wichita, KS 67203 | Oil & Gas Operator | Sep 2025 |
| 4 | Advance Energy Partners Hat Mesa, LLC | Dallas, TX 75240 | Oil & Gas Operator | Jul 2023 |
| 5 | Adventure Expl Partners II, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2014 |
| 6 | Adventure Exploration Partners, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2011 |
| 7 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Nov 2025 |
| 8 | Agua Sucia LLC | Lovington, NM 88260 | Oil & Gas Operator | Jul 2018 |
| 9 | Allen K Trobaugh | Midland, TX 79705 | Oil & Gas Operator | Mar 1997 |
| 10 | Amax Oil & Gas Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 11 | Ameredev New Mexico, LLC | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 12 | Ameredev Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Nov 2025 |
| 13 | American Inland Resources Company LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2005 |
| 14 | American National Petroleum Co. | Houston, TX 77057 | Oil & Gas Operator | Aug 1995 |
| 15 | Americo Energy Resources, LLC | Houston, TX 77063 | Oil & Gas Operator | Nov 2025 |
| 16 | Amerind Oil Co L P | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 17 | Ameristate Exploration LLC | Austin, TX 78701 | Oil & Gas Operator | Nov 2009 |
| 18 | Ammonite Energy Texas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Aug 2003 |
| 19 | Amtex Energy, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Nov 2025 |
| 20 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Aug 2025 |
| 21 | Anson Gas Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | May 1997 |
| 22 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Nov 2025 |
| 23 | Apache Energy Resources Corp. | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 24 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 25 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 26 | Arena Resources Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 27 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 28 | Armstrong Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Aug 2025 |
| 29 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 30 | Arrow Exploration Company | Plano, TX 75075 | Oil & Gas Operator | Dec 2004 |
| 31 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Nov 2025 |
| 32 | Ascent Energy, LLC. | Parker, CO 80134 | Oil & Gas Operator | Jul 2023 |
| 33 | Asher Enterprises LTD. Co. | Denton, TX 76210 | Oil & Gas Operator | Nov 2023 |
| 34 | Asher Oil Co | Artesia, NM 88210 | Oil & Gas Operator | Aug 1995 |
| 35 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 2025 |
| 36 | Atasca Resources, Inc. | Houston, TX 77219 | Oil & Gas Operator | Nov 2025 |
| 37 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2025 |
| 38 | Autry C. Stephens | Midland, TX 79701 | Oil & Gas Operator | Dec 2001 |
| 39 | Avant Operating, LLC | Midland, TX 79706 | Oil & Gas Operator | Aug 2025 |
| 40 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Nov 2025 |
| 41 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Nov 2025 |