| 101 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 102 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | Sep 2026 |
| 103 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 104 | Dune Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1997 |
| 105 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Sep 2026 |
| 106 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 107 | E.G. Operating | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 108 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2026 |
| 109 | Eclipse Petroleum Corporation | La Grange, TX 78945 | Oil & Gas Operator | Aug 2003 |
| 110 | Ef Oil And Gas Invest, L.L.C. | Beaver, OK 73932 | Oil Operator | Sep 2026 |
| 111 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 112 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 113 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 114 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2025 |
| 115 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jun 2026 |
| 116 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2026 |
| 117 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 118 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 119 | Estacado Energy, Inc. | Austin, TX 78716 | Oil & Gas Operator | Jul 1999 |
| 120 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 121 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jun 2026 |
| 122 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 123 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jan 2026 |
| 124 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Sep 2026 |
| 125 | Fagadau Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2006 |
| 126 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Sep 2026 |
| 127 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 2026 |
| 128 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 129 | Floyd Oil Co | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 130 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 131 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 132 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 133 | Fuller Operating Company | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2008 |
| 134 | Gaea Services, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2021 |
| 135 | Gecko | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 136 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 137 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 138 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 139 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 140 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 141 | GTG Operating, LLC | Tyler, TX 75713 | Oil & Gas Operator | Sep 2026 |
| 142 | H & O Operating Co | Odessa, TX 79764 | Oil & Gas Operator | Mar 2008 |
| 143 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 144 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 145 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Sep 2026 |
| 146 | Harvest Petroleum Partners LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 147 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 148 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 149 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 150 | Highmark Energy Operating, LLC | Houston, TX 77253 | Oil & Gas Operator | Sep 2026 |
| 151 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Sep 2026 |
| 152 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 153 | Hog Partnership LP | Dallas, TX 75235 | Gas Operator | Jul 2026 |
| 154 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 155 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Sep 2026 |
| 156 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 157 | Hyquest Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2015 |
| 158 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 159 | Ingram, J. Oil & Gas, Inc. | Plano, TX 75074 | Oil & Gas Operator | Sep 2026 |
| 160 | J C Petroleum Inc | Chickasha, OK 73023-1433 | Oil & Gas Operator | Dec 2013 |
| 161 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Sep 2026 |
| 162 | Jetta Operating Company, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 163 | Jones, L. E. Operating, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Sep 2026 |
| 164 | Joplin Oil Co., Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Sep 2026 |
| 165 | Journey Operating LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 166 | JTL Operating Co Inc | Katy, TX 77450 | Oil & Gas Operator | Sep 2026 |
| 167 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 168 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Sep 2026 |
| 169 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Sep 2026 |
| 170 | Karico GP, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 171 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | May 2026 |
| 172 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Sep 2026 |
| 173 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 174 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jul 2026 |
| 175 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 176 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Sep 2026 |
| 177 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 178 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 179 | Lacy, R., Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2002 |
| 180 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Sep 2026 |
| 181 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 182 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 183 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 184 | Lario Oil & Gas Company | Denver, CO 80206 | Oil & Gas Operator | Sep 2026 |
| 185 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Sep 2026 |
| 186 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 187 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 188 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 189 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 190 | Magnum Hunter Production, Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2019 |
| 191 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 192 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 193 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Jun 2026 |
| 194 | Markay Oil & Gas Company | Midland, TX 79701 | Oil & Gas Operator | Sep 1998 |
| 195 | Martin, Jimmy Inc | San Angelo, TX 76904 | Oil & Gas Operator | Sep 2026 |
| 196 | Massingill & McCutchin | Lubbock, TX 79424 | Oil & Gas Operator | Aug 2003 |
| 197 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 198 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 199 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 200 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |