| 101 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2024 |
| 102 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Apr 2025 |
| 103 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 104 | Cole, John Otis | Big Spring, TX 79721 | Oil & Gas Operator | Jan 1999 |
| 105 | Concord Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2021 |
| 106 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 107 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 108 | Covered H Energy, LLC | Lubbock, TX 79423 | Oil Operator | Apr 2025 |
| 109 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 110 | Cox, Lee Investments Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Apr 2025 |
| 111 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 112 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2025 |
| 113 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 114 | D & D Well Service, L.L.C. | Post, TX 79356 | Oil Operator | Apr 2025 |
| 115 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Apr 2025 |
| 116 | Dearing, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2021 |
| 117 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 118 | DHC, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 1997 |
| 119 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 120 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 121 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Feb 2025 |
| 122 | Dodson, Wayne Consultants, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2003 |
| 123 | Dominion Natural Resources LLC | Dallas, TX 75367 | Oil & Gas Operator | Apr 2025 |
| 124 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 125 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | Apr 2025 |
| 126 | Dragoon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2015 |
| 127 | Drum Oil & Gas, Inc. | Houston, TX 77082 | Oil & Gas Operator | Apr 2025 |
| 128 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 129 | Duke, M. L. | Snyder, TX 79549 | Oil & Gas Operator | Mar 2008 |
| 130 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 131 | Dynamic Production, Inc. | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2025 |
| 132 | E.C. Production, L.L.C. | Rosenberg, TX 77471 | Oil & Gas Operator | Apr 2025 |
| 133 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2025 |
| 134 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 135 | Eastland Exploration, Inc. | Austin, TX 78763 | Oil & Gas Operator | Apr 1997 |
| 136 | Echols & Gray Bros. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2003 |
| 137 | Element Petro Operating II, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2016 |
| 138 | Element Petroleum Operating IV, | Midland, TX 79710 | Oil Operator | Apr 2025 |
| 139 | Empire Oil Of New Jersey | Post, TX 79356 | Oil & Gas Operator | Jan 1999 |
| 140 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 141 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 142 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Jan 2025 |
| 143 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 144 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 145 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 146 | Exotic Oil & Gas LLC | Indiana, PA 15701-3634 | Oil & Gas Operator | Dec 2024 |
| 147 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 148 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 149 | Feagan Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 150 | Federal Oil, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2025 |
| 151 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 152 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2025 |
| 153 | Flavian Oil Company | Dallas, TX 75206 | Gas Operator | Jan 1997 |
| 154 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Feb 2025 |
| 155 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 156 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 157 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 158 | Fort Worth Production Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 1996 |
| 159 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 160 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 161 | Fortune Production Co. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2008 |
| 162 | Fossil Fuels Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2000 |
| 163 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 164 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 165 | Fusion XP, Inc. | Arlington, TX 76006 | Oil Operator | Apr 2014 |
| 166 | G Productions | Snyder, TX 79549 | Oil & Gas Operator | Jun 1998 |
| 167 | Gallo Petroleum, LLC | Colorado City, TX 79512 | Oil Operator | Apr 2025 |
| 168 | Germany Exploration Co | Carrollton, TX 75006 | Oil & Gas Operator | Nov 1986 |
| 169 | Gladson, Willard | Ira, TX 79527 | Oil & Gas Operator | Jun 1998 |
| 170 | Gladson, Willard Estate Of | Odessa, TX 79762 | Oil & Gas Operator | Apr 2025 |
| 171 | Goodrich Pet. Co. Of Louisiana | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 172 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | Apr 2025 |
| 173 | Gray, Gordon Operator | Snyder, TX 79550 | Oil & Gas Operator | Apr 2025 |
| 174 | Grayrock Corp., The | Dallas, TX 75243 | Oil & Gas Operator | Dec 1999 |
| 175 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2025 |
| 176 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Dec 2024 |
| 177 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2025 |
| 178 | Green Light Operating, LLC. | Austin, TX 78746 | Oil Operator | Apr 2025 |
| 179 | Greystone Oil & Gas, LLP | Houston, TX 77057 | Oil & Gas Operator | Dec 2015 |
| 180 | Griffin Energy Holdings, LLC | Plano, TX 75093 | Oil Operator | Apr 2025 |
| 181 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 182 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 183 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Apr 2025 |
| 184 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 185 | H&G Petroleum Corporation | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 186 | H.P. Slagel Producing Co., LLC | San Angelo, TX 76902 | Oil Operator | Apr 2025 |
| 187 | Hair, Roger D. | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 188 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 189 | Hamill, Claud B. Estate Of | Houston, TX 77002 | Oil & Gas Operator | Nov 1995 |
| 190 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 191 | Hardin Energy Co., Inc. | Bigfoot, TX 78005 | Oil Operator | Apr 2025 |
| 192 | Hardin, W.V. Estate | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2002 |
| 193 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 194 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 195 | Hartoil Corporation | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 196 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 197 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 198 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 199 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 200 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |