| 201 | Miocene Oil & Gas, LTD. | Englewood, CO 80110 | Oil & Gas Operator | May 2025 |
| 202 | Miranda Energy Corporation | Midland, TX 79705 | Oil & Gas Operator | Jun 2016 |
| 203 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | May 2025 |
| 204 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | May 2025 |
| 205 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 206 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 207 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 208 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | May 2025 |
| 209 | Monadnock Resources Op Co, LLC | Dallas, TX 75209 | Oil & Gas Operator | Jan 2021 |
| 210 | Monadnock Resources, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2020 |
| 211 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 212 | Montex Drilling Company LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 213 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 214 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | May 2025 |
| 215 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 216 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 217 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 218 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 219 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | May 2025 |
| 220 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 221 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | May 2025 |
| 222 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 223 | Newton Corp.,The | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 224 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 225 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 226 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 227 | Novo Energy Resources | Houston, TX 77006 | Oil & Gas Operator | May 2025 |
| 228 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 229 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 230 | Octane Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 231 | Oil Management Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2022 |
| 232 | Oilwell Operators, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 233 | Oklahoma Operating Company | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 234 | Ops Group Limited | Houston, TX 77060 | Oil & Gas Operator | Jun 2014 |
| 235 | Orbit Enterprises, Inc. | Lovington, NM 88260 | Oil & Gas Operator | Mar 2015 |
| 236 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 237 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 238 | Pace Production Co. | San Angelo, TX 76902 | Oil & Gas Operator | May 2025 |
| 239 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 240 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 241 | Parker & Parsley, Wpi Agent | Midland, TX 79701 | Oil & Gas Operator | Oct 1997 |
| 242 | Pedco Resources Company | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2008 |
| 243 | Peden Energy | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2004 |
| 244 | Peden Energy, Inc. | Wolfforth, TX 79382 | Oil & Gas Operator | May 2025 |
| 245 | Peden, Oren Inc. | Levelland, TX 79336 | Oil & Gas Operator | May 2001 |
| 246 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 247 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 248 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 249 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2025 |
| 250 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 251 | Petron Oil Company | Missouri City, TX 77489 | Oil & Gas Operator | May 2025 |
| 252 | Petrosource Production Co. L.P. | Midland, TX 79701 | Oil & Gas Operator | Nov 2007 |
| 253 | Petrosource Production Co., LLC | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 254 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 255 | Phoenix Hydrocarbons Operating | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 256 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 257 | Prasad, Hari Production Co. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 258 | Probe Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jul 2016 |
| 259 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 260 | Purvis Operating Co. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 261 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2025 |
| 262 | Quien Sabe Operating, LLC | Sundown, TX 79372 | Oil & Gas Operator | Nov 2023 |
| 263 | Quintana Pet. Corp. | Refugio, TX 78377 | Oil & Gas Operator | Dec 2000 |
| 264 | Radtke, D.E. & Associates, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2004 |
| 265 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 266 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 267 | Rand Oil & Gas Corp. | Houston, TX 77040 | Oil & Gas Operator | May 2025 |
| 268 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 269 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | May 2025 |
| 270 | Ray Herring Estate | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 271 | Ray Herring Operating Co., LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 272 | Red Tail Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 273 | Redmon Oil Company, Inc., The | Plano, TX 75023 | Oil & Gas Operator | May 2025 |
| 274 | Reef Exploration, L.P. | Richardson, TX 75080 | Oil & Gas Operator | May 2025 |
| 275 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 276 | Regent Oil & Gas Company, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2006 |
| 277 | RMB Operating LLC | Lubbock, TX 79493 | Oil & Gas Operator | May 2025 |
| 278 | Roberts & Roberts Enterprise,Inc | Levelland, TX 79336 | Oil & Gas Operator | Jun 1996 |
| 279 | Roc Operating, Inc. | Plano, TX 75093 | Oil & Gas Operator | Oct 2008 |
| 280 | Roca Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 281 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 282 | Rocker A Operating Company | Post, TX 79356 | Oil & Gas Operator | Aug 2022 |
| 283 | Rogers, S. K. Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | May 2025 |
| 284 | Rollo Resources, LLC | Granbury, TX 76049 | Gas Operator | May 2025 |
| 285 | Sabinal Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2025 |
| 286 | Sandridge Tertiary, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2012 |
| 287 | Sandstone Operating Company, Inc | Odessa, TX 79762 | Oil & Gas Operator | Jul 1995 |
| 288 | Santa Fe Energy Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 289 | Santa Fe Exploration Company | Lubbock, TX 79408 | Oil & Gas Operator | Nov 1997 |
| 290 | Santa Fe Snyder Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2000 |
| 291 | Satanta Oil Company | Midland, TX 79704 | Oil & Gas Operator | May 2025 |
| 292 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 293 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 294 | Seven Wells Oil & Gas Expl. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2014 |
| 295 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 296 | Siana Oil & Gas | Conroe, TX 77305 | Oil & Gas Operator | May 2025 |
| 297 | Sierra Lima Oil & Gas, LLC | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 298 | Sierra Madre Natural Res., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 299 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | May 2025 |
| 300 | Silver Creek Permian Op Co, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2023 |