| 101 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 102 | Ploutos, LLC | | Oil Operator | May 2021 |
| 103 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 104 | Primos Production | | Oil & Gas Operator | Dec 2024 |
| 105 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Dec 2025 |
| 106 | R & H Oil & Gas Inc | | Oil & Gas Operator | Apr 1992 |
| 107 | R.C.Bertolet & Serio Expl Co | | Oil & Gas Operator | Nov 1992 |
| 108 | Richard B. Nelson,Etal | | Oil & Gas Operator | May 1979 |
| 109 | Risher Company, Inc. | | Oil & Gas Operator | Jul 2001 |
| 110 | Robertson Energy, LLC | | Oil & Gas Operator | Dec 2024 |
| 111 | Sam Spears, Jr. | | Oil & Gas Operator | Sep 1998 |
| 112 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 113 | Sandhill Production Inc | Shongaloo, LA 71072 | Oil & Gas Operator | Dec 2019 |
| 114 | Sante Fe Minerals | | Oil & Gas Operator | Dec 1987 |
| 115 | Santo Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 116 | Secan Oil Co Inc | | Oil & Gas Operator | May 1987 |
| 117 | Secan Oil Co., Inc.-Pennington | | Oil & Gas Operator | May 1987 |
| 118 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 119 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 120 | Sola Operating, LLC | Trout, LA 71371 | Oil Operator | Dec 2025 |
| 121 | Spokane Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 122 | Stanco Petroleum Inc | Kimball, NE 69145 | Oil & Gas Operator | Jul 1999 |
| 123 | Story Oil And Gas Inc | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 124 | Strata Energy, Inc. | | Oil & Gas Operator | Sep 1983 |
| 125 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 126 | Sun Exploration And Production Co | | Oil & Gas Operator | Jan 1990 |
| 127 | Sun Texas Company | | Oil & Gas Operator | Jun 1981 |
| 128 | T & F Oil Company, LLC | | Oil Operator | Oct 2011 |
| 129 | Templeton Energy Inc | | Oil & Gas Operator | Jul 1987 |
| 130 | Texas City Refining, Inc. | | Oil & Gas Operator | Nov 1988 |
| 131 | Texas Pacific Oil Co. | | Oil & Gas Operator | Dec 1980 |
| 132 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 133 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 134 | Tideway Oil Programs, Inc. | | Oil & Gas Operator | Oct 1980 |
| 135 | Tyler Production, LLC | | Oil & Gas Operator | Jul 2013 |
| 136 | Vast Oil Inc | Fullerton, CA 92832 | Oil & Gas Operator | Mar 2024 |
| 137 | Vega Oil & Gas MGMT., Inc. | | Oil & Gas Operator | Aug 1981 |
| 138 | Verona Energy, Inc. | | Oil & Gas Operator | Nov 2024 |
| 139 | W A Lusk | | Oil & Gas Operator | Jul 2000 |
| 140 | Walter W. Heard, Jr. | | Oil & Gas Operator | Dec 1995 |
| 141 | Wayne J. Spears | | Oil & Gas Operator | Sep 2005 |
| 142 | White River Operating LLC | Gilmer, TX 75644 | Oil & Gas Operator | Oct 2025 |
| 143 | Whitetail Operators LLC | | Oil Operator | Nov 2021 |
| 144 | Wilcox Energy Company | | Oil & Gas Operator | Oct 2025 |
| 145 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 146 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |