| 401 | LYNCH | Tarrant County, TX | Gas Property | Feb 2024 |
| 402 | LYNN UNIT | Tarrant County, TX | Oil & Gas Property | Aug 2009 |
| 403 | MADDOX | Tarrant County, TX | Gas Property | Feb 2024 |
| 404 | MADDOX-BADGER | Tarrant County, TX | Gas Property | Feb 2024 |
| 405 | MAHAFFEY UNIT | Tarrant County, TX | Gas Property | Dec 2008 |
| 406 | MAHVASH UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 407 | MALLICK UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 408 | MANNING TRWD | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 409 | MANSFIELD | Tarrant County, TX | Gas Property | Feb 2024 |
| 410 | MANSFIELD PARTNERS | Tarrant County, TX | Gas Property | Feb 2024 |
| 411 | MANSFIELD SPORTS COMPLEX UNIT | Tarrant County, TX | Gas Property | Feb 2024 |
| 412 | MAPLE TREE | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 413 | MAPLE TREE SOUTH UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 414 | MARINE CREEK | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 415 | MARINE CREEK OF TEXAS | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 416 | MARTIN | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 417 | MARTIN-FOREST HILLS | Tarrant County, TX | Gas Property | Feb 2024 |
| 418 | MASTODON | Tarrant County, TX | Gas Property | Feb 2024 |
| 419 | MATHIS COAL CAR | Tarrant County, TX | Gas Property | Feb 2024 |
| 420 | MATLOCK | Tarrant County, TX | Gas Property | Feb 2024 |
| 421 | MAYFAIR | Tarrant County, TX | Gas Property | Jul 2019 |
| 422 | MAYFLOWER | Tarrant County, TX | Gas Property | Feb 2024 |
| 423 | MB A UNIT | Tarrant County, TX | Gas Property | Feb 2024 |
| 424 | MB B UNIT | Tarrant County, TX | Gas Property | Feb 2024 |
| 425 | MCCULLAR | Tarrant County, TX | Gas Property | Feb 2024 |
| 426 | MCCULLEY | Tarrant County, TX | Gas Property | Feb 2024 |
| 427 | MCDANIEL | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 428 | MCKINNEY WILLIAM | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 429 | MCMAHON | Tarrant County, TX | Gas Property | Feb 2024 |
| 430 | MEACHAM | Tarrant County, TX | Gas Property | Feb 2024 |
| 431 | MEACHAM NORTH UNIT Q | Tarrant County, TX | Gas Property | Feb 2024 |
| 432 | MEACHAM SOUTH UNIT B | Tarrant County, TX | Gas Property | Feb 2024 |
| 433 | MEEKINS-MAYS | Tarrant County, TX | Gas Property | Feb 2024 |
| 434 | MERCADO | Tarrant County, TX | Gas Property | Feb 2024 |
| 435 | MERCANTILE | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 436 | MERCER RANCH | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 437 | MEREKEN | Tarrant County, TX | Gas Property | Feb 2024 |
| 438 | MILNE CARROLL UNIT A | Tarrant County, TX | Gas Property | Feb 2024 |
| 439 | MINERALS W.S | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 440 | MIRA LAGOS | Tarrant County, TX | Gas Property | Feb 2024 |
| 441 | MIRA VISTA UNIT A | Tarrant County, TX | Gas Property | Feb 2024 |
| 442 | MIRA VISTA UNIT C | Tarrant County, TX | Gas Property | Feb 2024 |
| 443 | MISSION | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 444 | MITCHELL | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 445 | MOHO | Tarrant County, TX | Gas Property | Feb 2024 |
| 446 | MOORE | Tarrant County, TX | Oil & Gas Property | Jan 2024 |
| 447 | MORITZ | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 448 | MORRIS FOWLER 1H | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 449 | MORROW/STEVENS | Tarrant County, TX | Gas Property | Feb 2024 |
| 450 | MORTIMER | Tarrant County, TX | Gas Property | Feb 2024 |
| 451 | MOSS | Tarrant County, TX | Gas Property | Feb 2024 |
| 452 | MOUNT TABOR | Tarrant County, TX | Gas Property | Feb 2024 |
| 453 | MOUNT TABOR BRAYLON MIPA UNIT 3H | Tarrant County, TX | Gas Property | Feb 2024 |
| 454 | MOUSER UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 455 | MT ACE UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 456 | MT BIRDIE UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 457 | MT. OLIVET | Tarrant County, TX | Gas Property | Apr 2023 |
| 458 | MULLIGAN | Tarrant County, TX | Gas Property | Feb 2024 |
| 459 | MURRIN BEAR CREEK | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 460 | N SID RICHARDSON | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 461 | NANCE | Tarrant County, TX | Gas Property | Feb 2024 |
| 462 | NANCE SONNY UNIT | Tarrant County, TX | Gas Property | Feb 2024 |
| 463 | NEILL WAYNE | Tarrant County, TX | Gas Property | Feb 2024 |
| 464 | NEW DAWN UNIT | Tarrant County, TX | Gas Property | Feb 2024 |
| 465 | NEWELL | Tarrant County, TX | Gas Property | Dec 2023 |
| 466 | NORMANDALE | Tarrant County, TX | Oil & Gas Property | Apr 2023 |
| 467 | NOVIKOFF | Tarrant County, TX | Gas Property | Feb 2024 |
| 468 | NUGENT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 469 | NUGENT-BEAR TRT 4H | Tarrant County, TX | Gas Property | Feb 2024 |
| 470 | NUGENT-WHITMAN 5H | Tarrant County, TX | Gas Property | Feb 2024 |
| 471 | NW MERCADO | Tarrant County, TX | Gas Property | Feb 2024 |
| 472 | NW TARRANT PARTNERS | Tarrant County, TX | Gas Property | Feb 2024 |
| 473 | OAK GROVE UNIT | Tarrant County, TX | Gas Property | Feb 2024 |
| 474 | OAKWOOD | Tarrant County, TX | Gas Property | Feb 2024 |
| 475 | OK CORRAL | Tarrant County, TX | Gas Property | Feb 2024 |
| 476 | OLCOTT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 477 | OLCOTT NORTH A UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 478 | OLD WEATHERFORD | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 479 | OLE GIESER UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 480 | OLIVER | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 481 | OSLER | Tarrant County, TX | Gas Property | Feb 2024 |
| 482 | OSPREY | Tarrant County, TX | Gas Property | Feb 2024 |
| 483 | PACIFIC UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 484 | PAGE STREET | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 485 | PALOS VERDES | Tarrant County, TX | Gas Property | Feb 2024 |
| 486 | PANAGOPOULOS UNIT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 487 | PANTEGO | Tarrant County, TX | Gas Property | Jan 2024 |
| 488 | PANTHER HEIGHTS | Tarrant County, TX | Gas Property | Feb 2024 |
| 489 | PAPPAJOHN | Tarrant County, TX | Gas Property | Feb 2024 |
| 490 | PARROT | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 491 | PARROT RIVERBEND UNIT E | Tarrant County, TX | Gas Property | Feb 2024 |
| 492 | PEARCE | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 493 | PEARL FEDERAL | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 494 | PEARL RANCH | Tarrant County, TX | Oil & Gas Property | Feb 2024 |
| 495 | PEARSON | Tarrant County, TX | Gas Property | Feb 2024 |
| 496 | PEDEN UNIT | Tarrant County, TX | Gas Property | Feb 2024 |
| 497 | PELICAN BAY | Tarrant County, TX | Gas Property | Feb 2024 |
| 498 | PENSKE | Tarrant County, TX | Gas Property | Jul 2019 |
| 499 | PERR A UNIT | Tarrant County, TX | Gas Property | Jan 2024 |
| 500 | PERR B UNIT | Tarrant County, TX | Gas Property | Jan 2024 |