| 201 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 202 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 203 | Dallas Production | Dallas, TX 75206 | Oil & Gas Operator | Sep 1996 |
| 204 | Dan C Berry | Eunice, NM 88231 | Oil Operator | Oct 1995 |
| 205 | Dan Strong Jr | Midland, TX 79702 | Oil & Gas Operator | Mar 1994 |
| 206 | Davcro Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2003 |
| 207 | David H Arrington Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 208 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 209 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 210 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 211 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 212 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 213 | DGP Energy, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Jul 2025 |
| 214 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Sep 2025 |
| 215 | Diamondback Resources LLC | Midland, TX 79705 | Oil & Gas Operator | May 2018 |
| 216 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 217 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 218 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 219 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 220 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 221 | Don R Ormand | Midland, TX 79702 | Oil & Gas Operator | Jun 2014 |
| 222 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 223 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 224 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 225 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | Jul 2025 |
| 226 | Drum Energy Corp | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 227 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Jun 2025 |
| 228 | Duke Oil & Gas Inc | Colorado City, TX 79512 | Oil & Gas Operator | May 2003 |
| 229 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 230 | Dwight A Tipton | Lovington, NM 88260 | Oil & Gas Operator | Apr 2025 |
| 231 | Dwight Tipton Et Al | Hobbs, NM 88240 | Oil & Gas Operator | Nov 2002 |
| 232 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 233 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 234 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 235 | Earnest Producing Corporation | Midland, TX 79704 | Oil & Gas Operator | Sep 2025 |
| 236 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jul 2025 |
| 237 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 238 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 239 | Eclipse Oil & Gas, Inc. | Midland, TX 79703 | Oil & Gas Operator | Sep 2025 |
| 240 | Edge Petroleum Oper. Co., Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 241 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 242 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 243 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Sep 2025 |
| 244 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 245 | Elh Energy LLC | Lubbock, TX 79464 | Oil & Gas Operator | Jul 2025 |
| 246 | Elk Oil Company | Overland Park, KS 66212 | Oil & Gas Operator | Sep 2007 |
| 247 | Elliott Oil Co | Roswell, NM 88202 | Oil & Gas Operator | Nov 2001 |
| 248 | Empire New Mexico LLC | Tulsa, OK 74114 | Oil & Gas Operator | Jun 2025 |
| 249 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 250 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | May 2025 |
| 251 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 252 | Endura Energy LLC | Lubbock, TX 79464 | Oil & Gas Operator | Jan 2025 |
| 253 | Endurance Resources LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2017 |
| 254 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 255 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 256 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jun 2025 |
| 257 | Enerquest Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 258 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 259 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 260 | EOG A Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Dec 2018 |
| 261 | EOG M Resources, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Dec 2018 |
| 262 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 263 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 264 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | Sep 2025 |
| 265 | Ernie L Hegwer Ind | Hobbs, NM 88240 | Oil & Gas Operator | Sep 2002 |
| 266 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Sep 2025 |
| 267 | Erwin Oil & Gas LTD Co | Hobbs, NM 882411506 | Oil & Gas Operator | Apr 2003 |
| 268 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 269 | Etc Oil Co. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2004 |
| 270 | Etl Hydrocarbons, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Sep 2025 |
| 271 | Eunice Well Service Inc | Eunice, NM 88231 | Oil & Gas Operator | Jan 2000 |
| 272 | Euratex Corp | Glade Park, CO 81523 | Oil & Gas Operator | Sep 1996 |
| 273 | Evans Oil Company Inc | Eunice, NM 88231 | Oil & Gas Operator | Feb 2007 |
| 274 | Everquest Energy Corporation | Fredericksbrg, TX 78624 | Oil & Gas Operator | Sep 2025 |
| 275 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jun 2025 |
| 276 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 277 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Sep 2025 |
| 278 | F & M Oil & Gas Co | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 279 | Fae II Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Jul 2025 |
| 280 | Faith Trading, LLC | Lovington, NM 88260 | Oil Operator | Jul 2025 |
| 281 | Falcon Creek Resources, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2001 |
| 282 | Falcon Engineering Company, Inc. | Big Rapids, MI 493070818 | Oil & Gas Operator | Jul 2001 |
| 283 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Sep 2025 |
| 284 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Sep 2025 |
| 285 | Fe-NM, LLC | Tyler, TX 75711 | Oil & Gas Operator | Jul 2025 |
| 286 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 287 | Fina Oil & Chemical | Midland, TX 797022455 | Oil & Gas Operator | Apr 1999 |
| 288 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Sep 2025 |
| 289 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 2025 |
| 290 | Firewater, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2011 |
| 291 | Five State Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Oct 1995 |
| 292 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 293 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | Sep 2025 |
| 294 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Sep 2025 |
| 295 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Sep 2025 |
| 296 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 297 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 298 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 299 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 300 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |