| 401 | MANN-SPEIGHT | Harrison County, TX | Oil & Gas Property | Apr 2026 |
| 402 | MANN15 | Upton County, TX | Oil & Gas Property | Apr 2026 |
| 403 | MANN17 | Upton County, TX | Oil & Gas Property | Apr 2026 |
| 404 | MANN25 | Upton County, TX | Oil & Gas Property | Apr 2026 |
| 405 | MANN5 | Upton County, TX | Oil & Gas Property | Apr 2026 |
| 406 | MANN6 | Upton County, TX | Oil & Gas Property | May 2024 |
| 407 | MANN7 | Upton County, TX | Oil & Gas Property | Jun 2023 |
| 408 | MANNING | Jackson County, TX | Gas Property | Mar 2026 |
| 409 | MANNING | Young County, TX | Oil & Gas Property | Apr 2026 |
| 410 | MANNING | Madison County, TX | Oil & Gas Property | Apr 2026 |
| 411 | MANNING | Leon County, TX | Oil & Gas Property | Apr 2026 |
| 412 | MANNING | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 413 | MANNING DAN W | Ochiltree County, TX | Oil & Gas Property | Mar 2019 |
| 414 | MANNING GAS UNIT | Robertson County, TX | Oil & Gas Property | Apr 2026 |
| 415 | MANNING TRWD | Tarrant County, TX | Oil & Gas Property | Apr 2026 |
| 416 | MANNING UNIT | Wilson County, TX | Oil & Gas Property | Apr 2026 |
| 417 | MANNING, R.V | Caldwell County, TX | Oil & Gas Property | Oct 1998 |
| 418 | MANNING-FOSTER (AW) | Cass County, TX | Oil & Gas Property | Apr 2026 |
| 419 | MANNING-KESSLER (AW) | Cass County, TX | Oil & Gas Property | Apr 2026 |
| 420 | MANNINGS 4M FARM | Johnson County, TX | Gas Property | Apr 2026 |
| 421 | MANOR PARK EAST UNIT | Midland County, TX | Oil & Gas Property | Apr 2026 |
| 422 | MANOR PARK WEST | Midland County, TX | Oil & Gas Property | Apr 2026 |
| 423 | MANRY STATE | Webb County, TX | Oil & Gas Property | Apr 2026 |
| 424 | MANSFIELD | Oldham County, TX | Oil & Gas Property | Apr 2026 |
| 425 | MANSFIELD | Tarrant County, TX | Gas Property | Apr 2026 |
| 426 | MANSFIELD | Jack County, TX | Oil & Gas Property | Apr 2026 |
| 427 | MANSFIELD PARTNERS | Tarrant County, TX | Gas Property | Apr 2026 |
| 428 | MANSFIELD SPORTS COMPLEX UNIT | Tarrant County, TX | Gas Property | Apr 2026 |
| 429 | MANSINGER 1 | Harrison County, TX | Oil & Gas Property | Apr 2026 |
| 430 | MANSKER A | Bee County, TX | Oil & Gas Property | Mar 2026 |
| 431 | MANSON | Montague County, TX | Oil & Gas Property | Apr 2026 |
| 432 | MANSON, MARY LOU | Smith County, TX | Oil Property | Apr 2026 |
| 433 | MANSUR | Jones County, TX | Oil Property | Apr 2026 |
| 434 | MANTA | Brazos County, TX | Oil & Gas Property | Mar 2026 |
| 435 | MANTICORE STATE 55-3-3 UNIT | Reeves County, TX | Oil & Gas Property | Apr 2026 |
| 436 | MANUEL | Throckmorton County, TX | Oil & Gas Property | Apr 2026 |
| 437 | MANUEL LABOR | Johnson County, TX | Gas Property | Apr 2026 |
| 438 | MANVILLE JOHNS | Johnson County, TX | Gas Property | Jul 2019 |
| 439 | MANZIEL G | Wood County, TX | Oil & Gas Property | Apr 2026 |
| 440 | MAPACHE | Mitchell County, TX | Oil & Gas Property | Apr 2026 |
| 441 | MAPACHE GRANDE | Scurry County, TX | Oil & Gas Property | Apr 2026 |
| 442 | MAPACHE GRANDE 14 | Scurry County, TX | Oil & Gas Property | Apr 2026 |
| 443 | MAPACHE GRANDE 2 | Scurry County, TX | Oil & Gas Property | Apr 2026 |
| 444 | MAPLE | Karnes County, TX | Oil & Gas Property | Apr 2026 |
| 445 | MAPLE STATE 56-2-12 UNIT 1H | Reeves County, TX | Oil & Gas Property | Apr 2026 |
| 446 | MAPLE TREE | Tarrant County, TX | Oil & Gas Property | Apr 2026 |
| 447 | MAPLE TREE SOUTH UNIT | Tarrant County, TX | Oil & Gas Property | Apr 2026 |
| 448 | MAPLES | Johnson County, TX | Oil & Gas Property | Apr 2026 |
| 449 | MAR RANCH | Atascosa County, TX | Oil & Gas Property | Apr 2026 |
| 450 | MARA UNIT | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 451 | MARACHE | Goliad County, TX | Oil & Gas Property | Apr 2026 |
| 452 | MARADA | Winkler County, TX | Oil & Gas Property | Jul 2023 |
| 453 | MARALDO A403 | Dewitt County, TX | Oil & Gas Property | Apr 2026 |
| 454 | MARALDO-KOOP A USW | Dewitt County, TX | Oil & Gas Property | Apr 2026 |
| 455 | MARALO | Midland County, TX | Oil & Gas Property | Apr 2026 |
| 456 | MARALO 41-32 ALLOCATION 32 | Midland County, TX | Oil & Gas Property | Apr 2026 |
| 457 | MARALO STATE 33 | Reeves County, TX | Oil & Gas Property | Apr 2026 |
| 458 | MARALO-CONNELL | Garza County, TX | Oil & Gas Property | Dec 2024 |
| 459 | MARATHON | Reagan County, TX | Oil & Gas Property | Apr 2026 |
| 460 | MARATHON | Yoakum County, TX | Oil & Gas Property | Apr 2026 |
| 461 | MARATHON-UNIVERSITY | Andrews County, TX | Oil & Gas Property | Apr 2026 |
| 462 | MARBACH | Atascosa County, TX | Oil & Gas Property | Apr 2026 |
| 463 | MARBERRY | Refugio County, TX | Oil & Gas Property | Feb 2023 |
| 464 | MARBLE FALLS UNIT | Comanche County, TX | Oil & Gas Property | Sep 2016 |
| 465 | MARBURGER | Bastrop County, TX | Oil & Gas Property | Feb 2020 |
| 466 | MARBURGER | Lee County, TX | Oil & Gas Property | Apr 2026 |
| 467 | MARBURGER A UNIT | Lee County, TX | Oil Property | Mar 2026 |
| 468 | MARCEE | Gonzales County, TX | Oil & Gas Property | Nov 2015 |
| 469 | MARCELLA 1 | Madison County, TX | Oil & Gas Property | Mar 2026 |
| 470 | MARCELLUS WALLACE | Coleman County, TX | Oil Property | Apr 2024 |
| 471 | MARCH | Tom Green County, TX | Oil & Gas Property | Apr 2026 |
| 472 | MARCHANT | Montague County, TX | Oil & Gas Property | Apr 2026 |
| 473 | MARCHBANKS | Scurry County, TX | Oil & Gas Property | Apr 2026 |
| 474 | MARCHBANKS | Howard County, TX | Oil & Gas Property | Apr 2026 |
| 475 | MARCHBANKS | Duval County, TX | Oil & Gas Property | Apr 2026 |
| 476 | MARCHBANKS-CADENA | Duval County, TX | Oil & Gas Property | Aug 2023 |
| 477 | MARCHMAN | Young County, TX | Oil & Gas Property | Apr 2026 |
| 478 | MARCIA SWAN | Jack County, TX | Oil & Gas Property | Apr 2026 |
| 479 | MARCIA-SHELLY (SA) UNIT | Lavaca County, TX | Oil & Gas Property | Apr 2026 |
| 480 | MARCO 160 | Reagan County, TX | Oil & Gas Property | Apr 2026 |
| 481 | MARCO GAS UNIT | San Augustine County, TX | Oil & Gas Property | Apr 2026 |
| 482 | MARCOM | Hockley County, TX | Oil & Gas Property | Apr 2026 |
| 483 | MARCUS FIVE H05ML | Fayette County, TX | Oil & Gas Property | Apr 2026 |
| 484 | MARCUS J. FLEMING | Madison County, TX | Oil & Gas Property | Mar 2026 |
| 485 | MARCUS ONE H01ML | Fayette County, TX | Oil & Gas Property | Apr 2026 |
| 486 | MARCUS THREE H03ML | Fayette County, TX | Oil & Gas Property | Apr 2026 |
| 487 | MARCY | Howard County, TX | Oil & Gas Property | Apr 2026 |
| 488 | MARECEK 211 | Glasscock County, TX | Oil & Gas Property | Apr 2026 |
| 489 | MAREK | Lee County, TX | Oil & Gas Property | Apr 2026 |
| 490 | MAREK | Victoria County, TX | Oil & Gas Property | Apr 2026 |
| 491 | MAREK | Lee County, TX | Oil & Gas Property | Dec 2014 |
| 492 | MAREK 1 | Colorado County, TX | Oil & Gas Property | Apr 2026 |
| 493 | MAREK EF UNIT | Burleson County, TX | Oil & Gas Property | Mar 2026 |
| 494 | MAREK UNIT | Karnes County, TX | Oil & Gas Property | Apr 2026 |
| 495 | MARES H. F. JR | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 496 | MARESH | Burleson County, TX | Oil Property | Mar 2026 |
| 497 | MARGA | Sherman County, TX | Gas Property | Apr 2026 |
| 498 | MARGARET | Lee County, TX | Oil & Gas Property | Apr 2026 |
| 499 | MARGARET | Martin County, TX | Oil & Gas Property | Apr 2026 |
| 500 | MARGARET | Sterling County, TX | Oil & Gas Property | Apr 2026 |