| 401 | LANDING | Tarrant County, TX | Gas Property | Jan 2025 |
| 402 | LANE 1H | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 403 | LANGLEY | Tarrant County, TX | Gas Property | Jan 2004 |
| 404 | LAPRELL | Tarrant County, TX | Gas Property | Jan 2025 |
| 405 | LAPRELLE | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 406 | LARGENT | Tarrant County, TX | Gas Property | Jul 2022 |
| 407 | LARRY LEGEND UNIT 2H | Tarrant County, TX | Gas Property | Jan 2025 |
| 408 | LASATER J. W. GAS UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 409 | LATHAM TRWD | Tarrant County, TX | Gas Property | Apr 2018 |
| 410 | LAWHON SOUTH UNIT | Tarrant County, TX | Gas Property | Sep 2024 |
| 411 | LAWHON WEST UNIT | Tarrant County, TX | Oil & Gas Property | Jul 2014 |
| 412 | LAXSON | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 413 | LEAF | Tarrant County, TX | Gas Property | Jan 2025 |
| 414 | LEDBETTER UNIT | Tarrant County, TX | Gas Property | Mar 2023 |
| 415 | LEGGETT & PLATT | Tarrant County, TX | Gas Property | Jan 2025 |
| 416 | LENA | Tarrant County, TX | Gas Property | Jan 2025 |
| 417 | LENA-ELLA 2H | Tarrant County, TX | Gas Property | Jan 2025 |
| 418 | LENOX | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 419 | LESTER LEVY UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 420 | LEVY ACRES UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 421 | LEVY LESTER UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 422 | LEWIS | Tarrant County, TX | Gas Property | Jan 2025 |
| 423 | LIBERTY SCHOOL UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 424 | LILLY | Tarrant County, TX | Gas Property | Jan 2025 |
| 425 | LINKS | Tarrant County, TX | Gas Property | Jan 2025 |
| 426 | LITOGRAFIA | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 427 | LITTLE | Tarrant County, TX | Gas Property | Jan 2025 |
| 428 | LITTLE BEAR | Tarrant County, TX | Gas Property | Jan 2025 |
| 429 | LITTLE-PVI MIPA 5H | Tarrant County, TX | Gas Property | Jan 2025 |
| 430 | LMRA MONT DEL B UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 431 | LMRA WEST UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 432 | LONESOME DOVE | Tarrant County, TX | Oil & Gas Property | Nov 2019 |
| 433 | LONESTAR UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 434 | LOOP | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 435 | LORIKEET TRT | Tarrant County, TX | Gas Property | Jan 2025 |
| 436 | LOTTIE BARTON JOHNSON GU | Tarrant County, TX | Gas Property | Jan 2025 |
| 437 | LOUIS | Tarrant County, TX | Gas Property | Oct 2014 |
| 438 | LOWERY UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 439 | LUCK | Tarrant County, TX | Gas Property | Jan 2025 |
| 440 | LUMBERMEN | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 441 | LYNCH | Tarrant County, TX | Gas Property | Jan 2025 |
| 442 | LYNN UNIT | Tarrant County, TX | Oil & Gas Property | Aug 2009 |
| 443 | MADDOX | Tarrant County, TX | Gas Property | Jan 2025 |
| 444 | MADDOX-BADGER | Tarrant County, TX | Gas Property | Jan 2025 |
| 445 | MAHAFFEY UNIT | Tarrant County, TX | Gas Property | Dec 2008 |
| 446 | MAHVASH UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 447 | MALLICK UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 448 | MANNING TRWD | Tarrant County, TX | Oil & Gas Property | Oct 2024 |
| 449 | MANSFIELD | Tarrant County, TX | Gas Property | Jan 2025 |
| 450 | MANSFIELD PARTNERS | Tarrant County, TX | Gas Property | Jan 2025 |
| 451 | MANSFIELD SPORTS COMPLEX UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 452 | MAPLE TREE | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 453 | MAPLE TREE SOUTH UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 454 | MARINE CREEK | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 455 | MARINE CREEK OF TEXAS | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 456 | MARTIN | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 457 | MARTIN-FOREST HILLS | Tarrant County, TX | Gas Property | Jan 2025 |
| 458 | MASTODON | Tarrant County, TX | Gas Property | Jan 2025 |
| 459 | MATHIS COAL CAR | Tarrant County, TX | Gas Property | Jan 2025 |
| 460 | MATLOCK | Tarrant County, TX | Gas Property | Jan 2025 |
| 461 | MAVERICK 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 462 | MAYFAIR | Tarrant County, TX | Gas Property | Jul 2019 |
| 463 | MAYFLOWER | Tarrant County, TX | Gas Property | Jan 2025 |
| 464 | MB A UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 465 | MB B UNIT | Tarrant County, TX | Gas Property | Jan 2025 |
| 466 | MCCULLAR | Tarrant County, TX | Gas Property | Jan 2025 |
| 467 | MCCULLAR RUDDER BOXER MIPA 2H | Tarrant County, TX | Gas Property | Jan 2025 |
| 468 | MCCULLEY | Tarrant County, TX | Gas Property | Jan 2025 |
| 469 | MCDANIEL | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 470 | MCKINNEY WILLIAM | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 471 | MCMAHON | Tarrant County, TX | Gas Property | Jan 2025 |
| 472 | MEACHAM | Tarrant County, TX | Gas Property | Jan 2025 |
| 473 | MEACHAM NORTH UNIT Q | Tarrant County, TX | Gas Property | Jan 2025 |
| 474 | MEACHAM SOUTH UNIT B | Tarrant County, TX | Gas Property | Jan 2025 |
| 475 | MEEKINS-MAYS | Tarrant County, TX | Gas Property | Jan 2025 |
| 476 | MEGALODON 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 477 | MERCADO | Tarrant County, TX | Gas Property | Jan 2025 |
| 478 | MERCANTILE | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 479 | MERCER RANCH | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 480 | MEREKEN | Tarrant County, TX | Gas Property | Jan 2025 |
| 481 | MILNE CARROLL UNIT A | Tarrant County, TX | Gas Property | Jan 2025 |
| 482 | MINERALS W.S | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 483 | MIRA LAGOS | Tarrant County, TX | Gas Property | Jan 2025 |
| 484 | MIRA VISTA UNIT A | Tarrant County, TX | Gas Property | Jan 2025 |
| 485 | MIRA VISTA UNIT C | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 486 | MISSION | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 487 | MITCHELL | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 488 | MITCHELL BNM 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 489 | MITX-CENTEX UNIT 1 1H | Tarrant County, TX | Gas Property | Jan 2025 |
| 490 | MOHO | Tarrant County, TX | Gas Property | Jan 2025 |
| 491 | MOORE | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 492 | MORITZ | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 493 | MORROW/STEVENS | Tarrant County, TX | Gas Property | Jan 2025 |
| 494 | MORTIMER | Tarrant County, TX | Gas Property | Jan 2025 |
| 495 | MOSS | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 496 | MOUNT TABOR | Tarrant County, TX | Gas Property | Jan 2025 |
| 497 | MOUNT TABOR BRAYLON MIPA UNIT 3H | Tarrant County, TX | Gas Property | Jan 2025 |
| 498 | MOUSER UNIT | Tarrant County, TX | Oil & Gas Property | Jan 2025 |
| 499 | MS SOUTH | Tarrant County, TX | Gas Property | Jan 2025 |
| 500 | MS WEST | Tarrant County, TX | Gas Property | Jan 2025 |