| 101 | Export Petroleum Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2025 |
| 102 | Expro Engineering, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Apr 2025 |
| 103 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 104 | Federal Energy Development Co. | Dallas, TX 75205 | Oil & Gas Operator | Mar 2011 |
| 105 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 106 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Apr 2025 |
| 107 | GM Petroleum Corporation (I) | Dallas, TX 75218 | Oil & Gas Operator | Aug 2003 |
| 108 | Go Oil Corp. | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2025 |
| 109 | Gulftex Operating Inc | Plano, TX 75093 | Oil & Gas Operator | Apr 2025 |
| 110 | Hacker Brothers Well Service,Inc | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 111 | Hanks, Christopher Glenn | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2025 |
| 112 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 113 | Hawkbend LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 114 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 115 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 116 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 117 | Hillwood Energy Texas, L.P. | Fort Worth, TX 76177 | Gas Operator | Jan 2010 |
| 118 | Hillwood O & G Operating Co LP | Fort Worth, TX 76102 | Gas Operator | Apr 2025 |
| 119 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 120 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 121 | Hunter Energy, Inc. | Hurst, TX 76053 | Oil & Gas Operator | Apr 2025 |
| 122 | J D Sutton Inc | Loco, OK 73442-9701 | Oil & Gas Operator | Feb 2025 |
| 123 | J&H Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2025 |
| 124 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Apr 2025 |
| 125 | J.S.B. Oil Company | Hallettsville, TX 77964 | Oil & Gas Operator | Apr 2025 |
| 126 | Jackson, D. L., & Son | Jacksboro, TX 76458 | Oil & Gas Operator | May 2001 |
| 127 | Jerry Hess Operating Company | Muenster, TX 76252 | Oil Operator | Dec 2008 |
| 128 | Joint Resources Company | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 129 | Jones Energy LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |
| 130 | Jones Energy, LTD. | Austin, TX 78746 | Oil & Gas Operator | Sep 2013 |
| 131 | Kaico Petroleum, L.L.C. | Argyle, TX 76226 | Oil Operator | Oct 2018 |
| 132 | Krocan Energy Corporation | Bowling Green, KY 42102 | Oil & Gas Operator | Apr 2025 |
| 133 | L A Productions | Sunset, TX 76270 | Oil & Gas Operator | Apr 2025 |
| 134 | Lakota Energy, LTD. | Paradise, TX 76073 | Oil & Gas Operator | Apr 2025 |
| 135 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 136 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | Feb 2025 |
| 137 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 138 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Jan 2025 |
| 139 | Lewis, William T. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 140 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 141 | Lime Rock Resources IV-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 142 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 143 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 144 | Marshall, Sam | Granbury, TX 76048 | Oil & Gas Operator | Aug 2010 |
| 145 | Marshall, Samuel Meek, Estate Of | Granbury, TX 76048 | Oil & Gas Operator | Apr 2025 |
| 146 | Mash Oilfield Services, LP | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 147 | Maverick Production | Nocona, TX 76255 | Oil & Gas Operator | May 2007 |
| 148 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 149 | McMurrey, R. J., Production Comp | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 150 | Mereken Energy Corp. | Fort Worth, TX 76102 | Gas Operator | Feb 2006 |
| 151 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 152 | Mitchell Energy Company L.P. | Spring, TX 77387 | Oil & Gas Operator | Mar 2008 |
| 153 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 154 | Mogul Operating LLC | St Petersburg, FL 33706 | Oil Operator | Apr 2025 |
| 155 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 156 | Moore, Stephen Operating | Graham, TX 76450 | Oil & Gas Operator | Jun 2002 |
| 157 | Munson, David M. Inc. | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 158 | Nautilus Exploration, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Nov 2021 |
| 159 | Newark E&P Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2017 |
| 160 | Nichols, Carl E. | Azle, TX 76098 | Oil & Gas Operator | Aug 2004 |
| 161 | North Texas Llano Operating Corp | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 162 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 163 | Oklahoma Petroleum Allies LLC | Ardmore, OK 73401 | Oil Operator | Oct 2023 |
| 164 | Okreek Oil Company | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2025 |
| 165 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 166 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 167 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 168 | Peterson Oil And Gas LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2025 |
| 169 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Apr 2025 |
| 170 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2025 |
| 171 | Premier Natural Resources II,LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2015 |
| 172 | Questar Expl. And Prod. Co. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jul 2011 |
| 173 | Quicksilver Resources Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 174 | R. & R. Exploration, Inc. | Denton, TX 76202 | Oil Operator | Nov 1993 |
| 175 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 176 | Raven Operating Group, Inc. | Sedalia, CO 80135 | Oil & Gas Operator | Dec 2010 |
| 177 | Ray Jr. Co., Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Apr 2025 |
| 178 | Raylee Operating Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 179 | Red Oak Gas Operating Company LP | Houston, TX 77056 | Oil & Gas Operator | Dec 2017 |
| 180 | Red River Crude Oil LLC | Houston, TX 77081 | Oil Operator | Jan 2025 |
| 181 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Apr 2025 |
| 182 | Republic Energy Inc. | Decatur, TX 76234 | Oil & Gas Operator | Dec 2016 |
| 183 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2024 |
| 184 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Apr 2025 |
| 185 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 186 | Rife Operating, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2005 |
| 187 | Roil Mineral & Land Co. | Dallas, TX 75379 | Oil & Gas Operator | Apr 2025 |
| 188 | Ropa Exploration Corp. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2011 |
| 189 | Rowland Tank Truck Company | Sherman, TX 75090 | Oil & Gas Operator | Apr 2025 |
| 190 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 191 | RWJ Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 192 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 193 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 194 | Saddle Creek Energy Development | Dallas, TX 75251 | Oil & Gas Operator | Nov 2008 |
| 195 | Sage Natural Resources LLC | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 196 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 197 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 198 | Shelby Operating Company | Dallas, TX 75205 | Oil & Gas Operator | Apr 2025 |
| 199 | Shelby, Michael H. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2025 |
| 200 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 2025 |