| 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 Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 204 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 205 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 206 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 207 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 208 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Nov 2025 |
| 209 | Explo Oil, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Feb 2026 |
| 210 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 211 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Feb 2026 |
| 212 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 213 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Sep 2025 |
| 214 | Fagadau Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2006 |
| 215 | Falcon Creek Resources, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2001 |
| 216 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 217 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Feb 2026 |
| 218 | Feagan Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 219 | Felix Energy Holdings II, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2020 |
| 220 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 221 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Feb 2026 |
| 222 | First Permian, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 223 | Fisher Oil Co. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2026 |
| 224 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 225 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 226 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Feb 2026 |
| 227 | Flo Petro, LLC. | Tyler, TX 75713 | Oil Operator | Feb 2026 |
| 228 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 229 | Flux Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Feb 2026 |
| 230 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 231 | Forge Energy Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2023 |
| 232 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 233 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 234 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Feb 2026 |
| 235 | Fossil Petroleum LLC | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2026 |
| 236 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Feb 2026 |
| 237 | Founders Oil & Gas Operating,LLC | Arlington, TX 76011 | Oil & Gas Operator | Jul 2023 |
| 238 | Four Corners Petroleum II, LLC | Denver, CO 80215 | Oil & Gas Operator | Feb 2023 |
| 239 | Freedom Energy Inc | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Feb 2026 |
| 240 | Freedom Energy, Inc. (I) | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2003 |
| 241 | Freedom Energy, LTD. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2011 |
| 242 | Friemel & Carpenter, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2002 |
| 243 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 244 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 245 | Gallagher Oil | Grandfalls, TX 79742 | Oil Operator | Apr 2025 |
| 246 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 247 | Gauge Oil Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 248 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 249 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 250 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 251 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 252 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 253 | Graham, Bill J. Oil & Gas Corp. | Midland, TX 79710 | Oil & Gas Operator | Nov 2000 |
| 254 | Graham, H.E. | Imperial, TX 79743 | Oil & Gas Operator | Mar 2007 |
| 255 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 256 | Greenlake Energy Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 257 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 258 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 259 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 260 | Gulf Exploration Corporation | Irving, TX 75062 | Oil & Gas Operator | Feb 2026 |
| 261 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 262 | Gunvor USA LLC | Houston, TX 77002 | Oil Operator | Apr 2007 |
| 263 | Guthrie, A. K. Operating Co. | Big Spring, TX 79720 | Oil & Gas Operator | Mar 1996 |
| 264 | H & O Operating Co | Odessa, TX 79764 | Oil & Gas Operator | Mar 2008 |
| 265 | Halcon Operating Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 266 | Ham Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2000 |
| 267 | Hamm, Richard | Monahans, TX 79756 | Oil & Gas Operator | Mar 1994 |
| 268 | Hamm, Richard Inc. | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 269 | Harkey Energy Inc. | Odessa, TX 79762 | Oil & Gas Operator | Feb 2020 |
| 270 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 271 | Haylan Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jan 2000 |
| 272 | Heifer Production Company LLC | Houston, TX 77098 | Oil & Gas Operator | Feb 2026 |
| 273 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2025 |
| 274 | Helms Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 275 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 276 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 277 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | Dec 2024 |
| 278 | Herbig, J F | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 279 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 280 | High Desert Resources, L.L.C. | Midland, TX 79704 | Oil Operator | Feb 2026 |
| 281 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |
| 282 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 283 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Feb 2026 |
| 284 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 285 | Hillin, T. A. | Kerrville, TX 78028 | Oil & Gas Operator | Aug 2020 |
| 286 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 287 | Holmac Oil Company | Hobbs, NM 88240 | Oil & Gas Operator | May 1996 |
| 288 | Houghton Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2009 |
| 289 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 290 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 291 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 292 | Hunt, Hassie Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 293 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 294 | Hurst Oil & Gas, Inc. | Hillsboro, TX 76645 | Oil & Gas Operator | Dec 2024 |
| 295 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 296 | Ica Energy Operating, L.L.C. | Odessa, TX 79760 | Oil & Gas Operator | Feb 2026 |
| 297 | Ice Brothers, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2024 |
| 298 | Incline Energy | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 299 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 300 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |