| 1 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2025 |
| 2 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 3 | Barrow-Shaver Resources Co. | Tyler, TX 75703 | Oil & Gas Operator | Sep 2025 |
| 4 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Sep 2025 |
| 5 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 6 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 2025 |
| 7 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2025 |
| 8 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 9 | Cippele Resources Co. | Longview, TX 75608 | Oil & Gas Operator | May 1994 |
| 10 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 11 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Sep 2025 |
| 12 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 13 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 2025 |
| 14 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 15 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 16 | Dallas Petroleum Group, LLC | Dallas, TX 75379 | Oil & Gas Operator | Sep 2025 |
| 17 | Double S Liberty Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 18 | Express Oil Co. | Hallettsville, TX 77964 | Oil & Gas Operator | Sep 2025 |
| 19 | Eylau Oil Inc. | Atlanta, TX 75551 | Oil & Gas Operator | Oct 2021 |
| 20 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Sep 2025 |
| 21 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 22 | Genesis Producing Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2007 |
| 23 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Sep 2025 |
| 24 | Hardey Co., The | Shreveport, LA 71107 | Oil & Gas Operator | Sep 2025 |
| 25 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 26 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 27 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Sep 2025 |
| 28 | Legacy Exploration, LLC I | Dallas, TX 75201 | Oil & Gas Operator | Sep 2025 |
| 29 | Long Operating, L.L.C. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2006 |
| 30 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 2025 |
| 31 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Sep 2025 |
| 32 | Murphy Exploration & Prod. Co. | Houston, TX 77094 | Oil & Gas Operator | Jun 2011 |
| 33 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 34 | Neches Oil & Gas Company, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 35 | Paladin Drilling Company | McLeod, TX 75565 | Gas Operator | Sep 2011 |
| 36 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 37 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 38 | Pride Exploration, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2015 |
| 39 | Princess Three Operating, LLC | Henderson, TX 75653 | Oil & Gas Operator | Sep 2025 |
| 40 | Red Water Resources, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2025 |
| 41 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 42 | Reynolds Drilling Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Sep 2025 |
| 43 | Reynolds E & P, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Sep 2025 |
| 44 | Rockwall Marketing Corporation | Benbrook, TX 76126 | Oil & Gas Operator | Dec 2007 |
| 45 | Rogers, Mike Drilling Co., Inc. | Magnolia, AR 71754 | Oil & Gas Operator | Sep 2002 |
| 46 | S.E.D.I. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2015 |
| 47 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 48 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Sep 2025 |
| 49 | Shelby Production Co. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2009 |
| 50 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 51 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 52 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2025 |
| 53 | Smith Operating & Management Co. | Shreveport, LA 71161 | Oil & Gas Operator | Feb 2005 |
| 54 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 55 | Smith, E.N. III Energy Corp. | Marshall, TX 75671 | Oil & Gas Operator | Sep 2006 |
| 56 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Sep 2025 |
| 57 | Sunray Operating Company LLC | Sugar Land, TX 77498 | Oil & Gas Operator | Nov 2024 |
| 58 | Texcal Resources, Inc. | Plano, TX 75094 | Oil & Gas Operator | Apr 1994 |
| 59 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 60 | TMR Exploration, Inc. | Bossier City, LA 71171 | Oil & Gas Operator | Sep 2025 |
| 61 | Triad Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 2011 |
| 62 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 63 | Ultra Petroleum (U.S.A.), Inc. | Granbury, TX 76048 | Oil & Gas Operator | Sep 2003 |
| 64 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Sep 2025 |
| 65 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 66 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Sep 2025 |
| 67 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 68 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 69 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 70 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |