| 301 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 302 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 303 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 304 | Lawrence Energy Company | Abilene, TX 79602 | Oil & Gas Operator | Apr 2025 |
| 305 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2025 |
| 306 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2025 |
| 307 | Ledbetter, Jerald D. Estate Of | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 308 | Ledbetter, Jerald D. Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2007 |
| 309 | Ledger Operating Corporation | Abilene, TX 79601 | Oil Operator | Apr 2025 |
| 310 | Lime Creek Enterprises | Aztec, NM 87410 | Oil & Gas Operator | Aug 2008 |
| 311 | Line Energy LLC | Columbus, NE 68601 | Oil Operator | Apr 2025 |
| 312 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 313 | Lomax Operating Company, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2011 |
| 314 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 315 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 316 | Lone Star Production | Lawn, TX 79530 | Oil & Gas Operator | Apr 2025 |
| 317 | Lorac, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Apr 2025 |
| 318 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 319 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Apr 2025 |
| 320 | LP Robinson Holdings, L.L.C. | Abilene, TX 79608 | Oil Operator | Apr 2025 |
| 321 | LTS Oil & Gas | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2025 |
| 322 | Lynx Oil Co., Inc. | Denton, TX 76207 | Oil & Gas Operator | Sep 2003 |
| 323 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2025 |
| 324 | M & M Oil & Gas Exploration Inc | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 325 | M-Tex Resources, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Apr 2025 |
| 326 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |
| 327 | Magna Oil & Gas Corporation | Irving, TX 75017 | Oil & Gas Operator | Feb 2016 |
| 328 | Marshall R. Young Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 329 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Apr 2025 |
| 330 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 331 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 332 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 333 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 334 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 335 | McCutchin, Gene | Dallas, TX 75380 | Oil & Gas Operator | Aug 2003 |
| 336 | McIver, Inc | San Angelo, TX 76903 | Oil & Gas Operator | Apr 2025 |
| 337 | McIver, Terry L. | Santa Anna, TX 76878 | Oil & Gas Operator | Aug 2003 |
| 338 | McKenney & Chambers Oil Company | Westbrook, TX 79565 | Oil & Gas Operator | Oct 2003 |
| 339 | McMurrey, R. J., Production Comp | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 340 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 341 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 342 | Mesa Energy, Inc. | Austin, TX 78755 | Oil & Gas Operator | Dec 2013 |
| 343 | Mesa Ridge Holdings LLC | Abilene, TX 79603 | Oil Operator | Apr 2025 |
| 344 | MHM Pipeline Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Apr 2025 |
| 345 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 346 | Mid-Tex Resources | Merkel, TX 79536 | Oil & Gas Operator | Feb 2001 |
| 347 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 348 | Mission Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 349 | Mist Prod. & Exploration Corp. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 350 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 351 | MMG Oil Company | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2006 |
| 352 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 353 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 354 | Moore Investment Co. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 355 | Morris, W. Dale Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2025 |
| 356 | Morrison DRLG. & Prod. Co., Inc. | Abilene, TX 79606 | Oil & Gas Operator | Nov 2008 |
| 357 | Mudslinger Oil, L.L.C. | Abilene, TX 79601 | Oil Operator | Apr 2025 |
| 358 | Munoco Co. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2021 |
| 359 | Murphy Exploration & Production | Houston, TX 77024 | Oil Operator | Dec 2024 |
| 360 | Natural Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 1997 |
| 361 | Neal, Jack Engineering, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Feb 2011 |
| 362 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 363 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 364 | Norman Oil Corporation | Abilene, TX 79608 | Oil & Gas Operator | Mar 2000 |
| 365 | North American Drilling Corp | Plano, TX 75093 | Oil & Gas Operator | Apr 2025 |
| 366 | North American Exploration Co. | Abilene, TX 79602 | Oil & Gas Operator | Apr 1998 |
| 367 | Nosivad Oil, Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2025 |
| 368 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 369 | O'Ryan Oil And Gas | Odessa, TX 79768 | Oil & Gas Operator | Apr 2025 |
| 370 | Ogden Resources Corporation | Bryan, TX 77802 | Oil & Gas Operator | Apr 2025 |
| 371 | Ogden Resources, LTD. | Bryan, TX 77802 | Oil & Gas Operator | Feb 2009 |
| 372 | Ogog Operating, LLC | Dallas, TX 75367 | Oil & Gas Operator | Apr 2025 |
| 373 | Ohlhausen Oil Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 374 | Oil & Gas Properties | Midland, TX 79704 | Oil & Gas Operator | Apr 2025 |
| 375 | Oil Management Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2022 |
| 376 | Oilwell Operators, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 377 | Older Than Dirt LLC | Palo Pinto, TX 76484 | Oil & Gas Operator | Apr 2025 |
| 378 | Omni Petroleum Corporation | Austin, TX 78738 | Oil & Gas Operator | Apr 2025 |
| 379 | One Epoch Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 380 | Orth Oil Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2025 |
| 381 | P & W Well Service Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 382 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Apr 2025 |
| 383 | P.I.D. Drilling Inc | Clyde, TX 79510 | Oil & Gas Operator | Apr 2025 |
| 384 | Pace Operating | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 385 | Pan Petroleum Corp. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2008 |
| 386 | Panhandle Producing Company | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 387 | Paragon Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 388 | Paragon Oil & Gas, LLC | Aledo, TX 76008 | Oil & Gas Operator | Apr 2025 |
| 389 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 390 | Pardue Oil | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2006 |
| 391 | Pardue Oil, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 392 | Parmer, I. A. | Abilene, TX 79606 | Oil & Gas Operator | Oct 1993 |
| 393 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 394 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 395 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 396 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 397 | Patton, Lloyd | Fort Worth, TX 76113 | Oil & Gas Operator | Aug 2003 |
| 398 | Payne Petroleum | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 399 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 400 | Permian Legend LLC | San Marcos, TX 78666 | Oil Operator | Apr 2025 |