| 201 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 202 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 203 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 204 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 205 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 206 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 207 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 208 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 209 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 210 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 211 | Fabco | Big Lake, TX 76932 | Oil & Gas Operator | Oct 2025 |
| 212 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 213 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Oct 2025 |
| 214 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 215 | Fields Oil & Gas Company, LLC | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 216 | Fields, Bert, Jr. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2015 |
| 217 | Fiml Natural Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2014 |
| 218 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 219 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Oct 2025 |
| 220 | Fisher Oil Co. | Big Lake, TX 76932 | Oil & Gas Operator | Oct 2025 |
| 221 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 222 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 223 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Oct 2025 |
| 224 | Floyd, Timber Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 225 | Fort Worth Production Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 1996 |
| 226 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 227 | Fossil Petroleum LLC | San Angelo, TX 76906 | Oil & Gas Operator | Oct 2025 |
| 228 | Free Rein Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Oct 2025 |
| 229 | Friemel, Paul D. & Assoc., Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2007 |
| 230 | Ganador Operating, LLC | Boerne, TX 78006 | Oil & Gas Operator | Oct 2025 |
| 231 | GHS Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 232 | Glossop Oil & Gas, LLC | Midland, TX 79704 | Oil & Gas Operator | Jul 2025 |
| 233 | Glossop, Robert L. | Midland, TX 79704 | Oil & Gas Operator | Sep 2007 |
| 234 | Glossop, Robert L. Estate | Midland, TX 79704 | Oil & Gas Operator | Feb 2018 |
| 235 | Golden, Marty Joe | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 236 | Goldrus Producing Company | Houston, TX 77064 | Oil & Gas Operator | Aug 2009 |
| 237 | Goldrus/Permian Air, LLC | Spring, TX 77387 | Oil & Gas Operator | Nov 2020 |
| 238 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 239 | Gould Energy Co. | Owasso, OK 74055 | Oil & Gas Operator | Mar 2005 |
| 240 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 241 | Greasewood Oil Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2007 |
| 242 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 243 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 244 | Grover-McKinney Oil Company | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 245 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 246 | Gulftex Energy III, LP | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2018 |
| 247 | H & H Operating | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 248 | H & O Operating Co | Odessa, TX 79764 | Oil & Gas Operator | Mar 2008 |
| 249 | H L Brown Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 250 | H&P Oil & Gas LLC | Mertzon, TX 76941 | Oil & Gas Operator | Oct 2025 |
| 251 | Hadson Energy Resources Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 1994 |
| 252 | Halbouty, Michel T. | Houston, TX 77056 | Oil & Gas Operator | Aug 1997 |
| 253 | Hallwood Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2005 |
| 254 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 255 | Ham Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2000 |
| 256 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 257 | Hampton, Jno. W. & Son | Wichita Falls, TX 76302 | Oil & Gas Operator | Nov 1998 |
| 258 | Hank Oil & Gas, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2023 |
| 259 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 260 | Hannathon Petroleum II, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 261 | Hannathon Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 262 | Hardy Oil & Gas USA Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1996 |
| 263 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 264 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 265 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 266 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jun 2025 |
| 267 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 268 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 269 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 270 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 271 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | Oct 2025 |
| 272 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 273 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Oct 2025 |
| 274 | Hibernia Resources III, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2023 |
| 275 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | Oct 2025 |
| 276 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 277 | Holliday Drilling, Inc. | Stephenville, TX 76401 | Oil & Gas Operator | Dec 2020 |
| 278 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 279 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 280 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2023 |
| 281 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Oct 2025 |
| 282 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 283 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 284 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 285 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 286 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 287 | Ica Energy Operating, L.L.C. | Odessa, TX 79760 | Oil & Gas Operator | Oct 2025 |
| 288 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 289 | Independence Resources MGMT, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2021 |
| 290 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 291 | Isom Energy, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | May 2018 |
| 292 | J & J Services Company | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2025 |
| 293 | J J Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Mar 2008 |
| 294 | J.P. Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 295 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Oct 2025 |
| 296 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 297 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 298 | JM Cox Resources LP | Midland, TX 79702 | Oil & Gas Operator | Apr 2019 |
| 299 | JMW Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 300 | Jones, Johnny G. | Midland, TX 79708 | Oil & Gas Operator | Feb 2000 |