| 301 | Kukui Operating Company | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 302 | L & T Oil Co., Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 303 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Apr 2025 |
| 304 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 305 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2024 |
| 306 | Larry Marker Dba Marker Oil | Roswell, NM 88202 | Oil & Gas Operator | Jul 2017 |
| 307 | Latigo Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 308 | Lbo New Mexico Inc | Midland, TX BAD ADDR | Oil & Gas Operator | Dec 1996 |
| 309 | LCX Energy, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2010 |
| 310 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Apr 2025 |
| 311 | LG&S Oil Company, LLC | Lovington, NM 88260 | Oil Operator | Feb 2025 |
| 312 | LH Operating, LLC | Houston, TX 77098 | Oil & Gas Operator | Feb 2025 |
| 313 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 314 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 315 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 316 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 317 | Llano Land & Exploration Co | Roswell, NM 88202 | Oil & Gas Operator | Sep 2004 |
| 318 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 319 | LLJ Ventures, LLC Dba Marker Oil & Gas | Roswell, NM 88202 | Oil & Gas Operator | Apr 2022 |
| 320 | Lone Star Oil & Gas, Inc | Greenville, KY 42345 | Oil & Gas Operator | Dec 2023 |
| 321 | Lonestar Petroleum Services, LLC | Artesia, NM 88210 | Oil Operator | Feb 2025 |
| 322 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 323 | Lothian Oil Texas I, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 324 | Louis Dreyfus Natural Gas Inc | Houston, TX 770103088 | Oil & Gas Operator | Sep 1997 |
| 325 | Lynx Petroleum Consultants Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2024 |
| 326 | M Brad Bennett Inc | Midland, TX 797101510 | Oil & Gas Operator | Jul 2006 |
| 327 | M E W Enterprise | Roswell, NM 88203 | Oil & Gas Operator | Aug 2024 |
| 328 | M&M Oil, LLC | Artesia, NM 88210254 | Oil & Gas Operator | Feb 2025 |
| 329 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 330 | M7 Resources LLC | Santa Fe, NM 87505 | Oil Operator | Dec 2024 |
| 331 | Mack Energy Corporation | Artesia, NM 88211 | Oil & Gas Operator | Feb 2025 |
| 332 | Maddox Energy Corporation | Dallas, TX BAD ADDR | Oil & Gas Operator | Jul 1995 |
| 333 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 334 | Manzanita Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 335 | Manzano LLC | Roswell, NM 88202 | Oil & Gas Operator | Apr 2025 |
| 336 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 337 | Mar Oil & Gas Corp. | Santa Fe, NM 87502 | Oil & Gas Operator | Feb 2025 |
| 338 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 339 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Feb 2025 |
| 340 | Marathon Oil Permian LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 341 | Marbob Energy Corp | Artesia, NM 882110227 | Oil & Gas Operator | Oct 2010 |
| 342 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Feb 2025 |
| 343 | Marks And Garner Production LTD Co | Hobbs, NM 88241 | Oil & Gas Operator | Sep 2010 |
| 344 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 345 | Mason-Phillips Properties Of Florida | Ville Beach, FL 32250 | Oil Operator | Apr 1999 |
| 346 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 347 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 348 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 349 | Maverick Permian LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 350 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 351 | McClellan Oil Corporation | Roswell, NM 882020730 | Oil & Gas Operator | May 2015 |
| 352 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 353 | McKay Oil Corp | Roswell, NM 88202 | Oil & Gas Operator | Aug 2017 |
| 354 | McQuadrangle, LC | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2006 |
| 355 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 356 | Me-Tex Oil & Gas, Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Apr 2025 |
| 357 | Meadco Properties LTD | Midland, TX 79702 | Oil & Gas Operator | Sep 2019 |
| 358 | Melrose Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2011 |
| 359 | Melvin Or Kathleen Turnbow | Portales, NM 88130 | Oil & Gas Operator | Mar 2006 |
| 360 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 361 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Jan 2025 |
| 362 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Feb 2025 |
| 363 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Apr 2025 |
| 364 | Meteor Developments Inc | Denver, CO BAD ADDR | Oil & Gas Operator | Dec 1995 |
| 365 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 366 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 367 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 368 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Apr 2025 |
| 369 | Mission Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 370 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Apr 2025 |
| 371 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 372 | Morexco Inc | Midland, TX 79710 | Oil & Gas Operator | Mar 2019 |
| 373 | Mountain States Petroleum Corp | Midland, TX 79702 | Oil & Gas Operator | Apr 2008 |
| 374 | Mr NM Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2025 |
| 375 | Murchison Oil And Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 376 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 377 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Apr 2025 |
| 378 | Nadel And Gussman Heyco, LLC | Roswell, NM 88202 | Oil & Gas Operator | Dec 2014 |
| 379 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 380 | Nadel And Gussman, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2025 |
| 381 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 382 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2025 |
| 383 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 384 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | Apr 2025 |
| 385 | Newfield Exploration Mid-Continent Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2011 |
| 386 | NGX Company | Roswell, NM 88202 | Oil & Gas Operator | Jul 2008 |
| 387 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Apr 2025 |
| 388 | North Fork Operating LP | Mustang, OK 73064 | Oil & Gas Operator | Apr 2025 |
| 389 | Northern Pacific Oil And Gas Incorporated | Houston, TX 77024 | Oil & Gas Operator | Dec 2022 |
| 390 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 391 | Norwood Oil Corp | Malakoff, TX 75148 | Oil & Gas Operator | Oct 1995 |
| 392 | Novo Oil & Gas Northern Delaware, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2025 |
| 393 | Nuroc Energy Incorporated | Andrews, TX 79714 | Oil Operator | Feb 2025 |
| 394 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 395 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 396 | Ogs Operating Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2008 |
| 397 | Ogx Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 398 | Oil & Gas Operations | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 399 | Oleum Energy LLC | Georgetown, TX 78628 | Oil & Gas Operator | Feb 2025 |
| 400 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |