| 1 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | Oct 2025 |
| 2 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 3 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Oct 2025 |
| 4 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |
| 5 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 6 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 7 | Escondido Petroleum Company, Inc | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 8 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 9 | Flint Rock Resources MGMNT, Inc. | Austin, TX 78734 | Oil & Gas Operator | Oct 2025 |
| 10 | GGP Exploration, LTD. | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 11 | Global Oil Corp | Rising Star, TX 76471 | Oil Operator | Apr 2008 |
| 12 | Gsi Oil & Gas, Inc. | Bryan, TX 77806 | Oil & Gas Operator | Oct 2025 |
| 13 | Hayes, Marshall A. III | Chilton, TX 76632 | Oil & Gas Operator | Oct 2025 |
| 14 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 15 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Oct 2025 |
| 16 | K & D Enterprises, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2008 |
| 17 | Kalos Corporation | Tyler, TX 75701 | Oil & Gas Operator | Oct 2025 |
| 18 | Leexus Oil LLC | Giddings, TX 78942 | Oil & Gas Operator | Oct 2025 |
| 19 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 20 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Oct 2025 |
| 21 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | Oct 2025 |
| 22 | McCarthy Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2007 |
| 23 | Meador Enterprises, Inc. | Kilgore, TX 75662 | Oil Operator | Oct 2023 |
| 24 | Miller Energy Inc | Houston, TX 77024 | Oil & Gas Operator | Oct 2016 |
| 25 | Miller, Bob I. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 26 | Mogul Operating LLC | St Petersburg, FL 33706 | Oil Operator | Oct 2025 |
| 27 | Momentum Production Corp. | Baytown, TX 77521 | Oil & Gas Operator | Oct 2025 |
| 28 | Moon Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Mar 2003 |
| 29 | Paradigm Exploration, L.P. | La Grange, TX 78945 | Oil Operator | Sep 2008 |
| 30 | Priest Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 31 | Quanico Oil & Gas, Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Oct 2025 |
| 32 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | Oct 2025 |
| 33 | Rathburn Land & Devel, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Aug 2003 |
| 34 | Red Chalk Resources LLC | Houston, TX 77218 | Oil Operator | Oct 2025 |
| 35 | Riley Exploration, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Oct 2025 |
| 36 | Royalty Operating, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Nov 2007 |
| 37 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Oct 2025 |
| 38 | Searchers Exploration | Brenham, TX 77833 | Oil Operator | Oct 2025 |
| 39 | Standard Oil Company, Inc. | Parkesburg, WV 26103 | Oil & Gas Operator | Mar 2022 |
| 40 | Texas Royalty Corp. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 41 | Trinidad Exploration, Inc. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 42 | Triple "B" Production DRLG Inc | Poynor, TX 75782 | Oil & Gas Operator | Sep 2022 |
| 43 | Txu Lone Star Pipeline | Dallas, TX 75201 | Oil & Gas Operator | Oct 2003 |
| 44 | Viejo Services, LLC | Boyd, TX 76023 | Oil & Gas Operator | Oct 2025 |
| 45 | Wilbanks Energy Corporation | Houston, TX 77036 | Oil & Gas Operator | Dec 2001 |