| 101 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 102 | Raptor Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Feb 2026 |
| 103 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 104 | Republic Petroleum Corp. | | Oil & Gas Operator | Nov 1977 |
| 105 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | Sep 2018 |
| 106 | Richard A. Williams Expl Corp. | | Oil & Gas Operator | Dec 1983 |
| 107 | Rollar Oil Co., Inc. | | Oil & Gas Operator | Jul 1999 |
| 108 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 109 | S G L B Operating Company Inc | | Oil & Gas Operator | Nov 1993 |
| 110 | Santa Fe Energy Operg Parts LP | | Oil & Gas Operator | Nov 1993 |
| 111 | Senior G&A Operating Co Inc | | Oil & Gas Operator | Nov 1991 |
| 112 | Shell Oil Co. | Houston, TX 77001 | Oil & Gas Operator | Jun 1985 |
| 113 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 114 | Southwest General Dev., Inc. | | Oil & Gas Operator | Dec 2003 |
| 115 | Square Mile Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 116 | Talos Third Coast LLC | | Oil & Gas Operator | Dec 2024 |
| 117 | Tesla Resources, Inc. | | Oil & Gas Operator | Aug 1996 |
| 118 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Feb 2026 |
| 119 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 120 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 121 | Texoil Company | | Oil & Gas Operator | Dec 2000 |
| 122 | The Meridian Res. & Exp. LLC | | Oil & Gas Operator | Sep 2010 |
| 123 | The Meridian Resource & Exp Co | | Oil & Gas Operator | Dec 2000 |
| 124 | Traillour Oil Co. | | Oil & Gas Operator | Mar 1990 |
| 125 | Transcontinental Oil Corp. | | Oil & Gas Operator | Sep 1985 |
| 126 | Traver Oil & Gas Corporation | | Oil & Gas Operator | Sep 2000 |
| 127 | Traver Oil Company | | Oil & Gas Operator | Sep 2000 |
| 128 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 129 | U R C C | | Oil & Gas Operator | Jun 1991 |
| 130 | Union Expl. Partners, LTD. | | Oil & Gas Operator | Aug 1990 |
| 131 | Union Texas Petroleum Corp | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 132 | United Gas Pipe Line Co. | | Oil Operator | Aug 1993 |
| 133 | Us Oil & Gas Inc | Marietta, OH 45750 | Oil & Gas Operator | Jan 2026 |
| 134 | Vibe Resources LLC | | Oil & Gas Operator | Dec 2024 |
| 135 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 136 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | Feb 2026 |
| 137 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 138 | WM. T. Burton Industries, Inc. | | Oil & Gas Operator | Apr 1988 |
| 139 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |