| 501 | OSPREY | Tarrant County, TX | Gas Property | Nov 2025 |
| 502 | OSPREY STATE UNIT | Loving County, TX | Oil & Gas Property | Nov 2025 |
| 503 | OSPREY STATE WEST UNIT | Pecos County, TX | Oil & Gas Property | Nov 2025 |
| 504 | OSPREY UNIT | Atascosa County, TX | Oil & Gas Property | Nov 2025 |
| 505 | OSR-HALLIDAY | Madison County, TX | Oil & Gas Property | Oct 2025 |
| 506 | OSR/KIRBY | Reagan County, TX | Oil & Gas Property | Jun 2025 |
| 507 | OSTEEN W. N | Caldwell County, TX | Oil & Gas Property | Oct 2024 |
| 508 | OSTRANDER | Irion County, TX | Oil & Gas Property | Nov 2025 |
| 509 | OSTRICH UNIT | Atascosa County, TX | Oil & Gas Property | Nov 2025 |
| 510 | OTB BLAGRAVE 1 | Martin County, TX | Oil & Gas Property | Nov 2025 |
| 511 | OTB JOHNSON F | Martin County, TX | Oil & Gas Property | Nov 2025 |
| 512 | OTB OBRIEN 43 | Martin County, TX | Oil & Gas Property | Nov 2025 |
| 513 | OTEN WILL | Rusk County, TX | Oil & Gas Property | Nov 2025 |
| 514 | OTHER JEFFREY LEBOWSKI | Wilson County, TX | Oil & Gas Property | Nov 2025 |
| 515 | OTHOLD-MARTINSEN (SA) UNIT | Lavaca County, TX | Oil & Gas Property | Nov 2025 |
| 516 | OTIS | Ector County, TX | Oil & Gas Property | Apr 2012 |
| 517 | OTIS | Palo Pinto County, TX | Oil & Gas Property | Nov 2025 |
| 518 | OTIS | Howard County, TX | Oil & Gas Property | Nov 2025 |
| 519 | OTIS MEEK A GU 1H | Wise County, TX | Oil & Gas Property | Nov 2025 |
| 520 | OTIS PHILLIPS | Moore County, TX | Oil & Gas Property | Nov 2025 |
| 521 | OTRA BACA | Johnson County, TX | Gas Property | Nov 2025 |
| 522 | OTT C.E. ET AL | Galveston County, TX | Oil & Gas Property | Feb 2015 |
| 523 | OTTER 139-138 UNIT | Reeves County, TX | Oil & Gas Property | Oct 2025 |
| 524 | OTTER UNIT | Milam County, TX | Oil & Gas Property | Nov 2025 |
| 525 | OTTERHOUND HCX | Burleson County, TX | Oil & Gas Property | Oct 2025 |
| 526 | OTTO | Cooke County, TX | Oil & Gas Property | Nov 2025 |
| 527 | OTTO | Grayson County, TX | Oil & Gas Property | Nov 2025 |
| 528 | OTTO | Gonzales County, TX | Oil & Gas Property | Nov 2025 |
| 529 | OTTO | Cooke County, TX | Oil & Gas Property | Nov 2025 |
| 530 | OTTO 1H | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 531 | OTTO GAS UNIT NO. 1 | Kleberg County, TX | Oil & Gas Property | Dec 2023 |
| 532 | OTTO MAX | Atascosa County, TX | Oil & Gas Property | Oct 2015 |
| 533 | OTTO UNIT | Gonzales County, TX | Oil & Gas Property | Nov 2025 |
| 534 | OTTO UNIT 1H | McMullen County, TX | Gas Property | Nov 2025 |
| 535 | OTTO-WHIPPLE | McMullen County, TX | Oil & Gas Property | Nov 2025 |
| 536 | OUIDA WILSON 45 | Roberts County, TX | Oil & Gas Property | Nov 2025 |
| 537 | OURAY STATE | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 538 | OUTLAW 55-1-30 UNIT 1H | Loving County, TX | Oil & Gas Property | Nov 2025 |
| 539 | OUTTERSIDE A. J | Galveston County, TX | Oil & Gas Property | Oct 2025 |
| 540 | OV UNIT | Dawson County, TX | Oil & Gas Property | Nov 2025 |
| 541 | OVERALL | Coleman County, TX | Oil & Gas Property | Oct 2025 |
| 542 | OVERBEY | Wichita County, TX | Oil & Gas Property | Nov 2025 |
| 543 | OVERBY | Wichita County, TX | Oil & Gas Property | Oct 2025 |
| 544 | OVERBY C. J | Karnes County, TX | Oil & Gas Property | Apr 2015 |
| 545 | OVERBY GAS UNIT 2E | Bee County, TX | Oil & Gas Property | Nov 2025 |
| 546 | OVERCASH | Throckmorton County, TX | Oil & Gas Property | Nov 2025 |
| 547 | OVERPASS 1 | Jackson County, TX | Oil & Gas Property | Nov 2025 |
| 548 | OVERSHOWN GAS UNIT | Houston County, TX | Oil & Gas Property | Nov 2025 |
| 549 | OVERSTREET | Cooke County, TX | Oil Property | Nov 2025 |
| 550 | OVERSTREET | Polk County, TX | Oil & Gas Property | Apr 2025 |
| 551 | OVERTON | Smith County, TX | Oil & Gas Property | Nov 2025 |
| 552 | OVERTON | Dawson County, TX | Oil & Gas Property | Nov 2025 |
| 553 | OVERTON | Glasscock County, TX | Oil & Gas Property | Nov 2025 |
| 554 | OVERTON BEN | Brown County, TX | Oil & Gas Property | Nov 2025 |
| 555 | OVERTON G | Rusk County, TX | Oil & Gas Property | Nov 2025 |
| 556 | OVERTON NE (PETTIT -A-) UNIT | Rusk County, TX | Oil & Gas Property | Nov 2025 |
| 557 | OVMLC | Dawson County, TX | Oil & Gas Property | Nov 2025 |
| 558 | OWEN | Moore County, TX | Oil & Gas Property | Nov 2025 |
| 559 | OWEN | Johnson County, TX | Oil & Gas Property | Nov 2025 |
| 560 | OWEN | Burleson County, TX | Oil & Gas Property | Nov 2025 |
| 561 | OWEN | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 562 | OWEN | Jack County, TX | Oil & Gas Property | Apr 2025 |
| 563 | OWEN | Ector County, TX | Oil & Gas Property | Nov 2025 |
| 564 | OWEN | Jack County, TX | Oil & Gas Property | Nov 2025 |
| 565 | OWEN | Young County, TX | Oil & Gas Property | Nov 2025 |
| 566 | OWEN | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 567 | OWEN CHALK | Howard County, TX | Oil & Gas Property | Nov 2025 |
| 568 | OWEN F | Burleson County, TX | Oil & Gas Property | May 2022 |
| 569 | OWEN GMB | Harrison County, TX | Gas Property | Nov 2025 |
| 570 | OWEN J | Ellis County, TX | Oil & Gas Property | Aug 2025 |
| 571 | OWEN J.D. GAS UNIT | Bowie County, TX | Oil & Gas Property | Feb 2018 |
| 572 | OWEN RHB 1H | Harrison County, TX | Gas Property | Nov 2025 |
| 573 | OWEN-BERRY | Cooke County, TX | Oil Property | Nov 2025 |
| 574 | OWEN-BRISCOE | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 575 | OWEN-BRISCOE STATE-WCSL GU B 2H | Webb County, TX | Gas Property | Nov 2025 |
| 576 | OWEN-STATE 1 | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 577 | OWENS | Wise County, TX | Oil & Gas Property | Nov 2025 |
| 578 | OWENS | Jack County, TX | Oil & Gas Property | Sep 2021 |
| 579 | OWENS | Colorado County, TX | Oil & Gas Property | Oct 2025 |
| 580 | OWENS | Cass County, TX | Oil & Gas Property | Nov 2025 |
| 581 | OWENS | Johnson County, TX | Oil & Gas Property | Nov 2025 |
| 582 | OWENS | Lee County, TX | Oil & Gas Property | Nov 2025 |
| 583 | OWENS | Crockett County, TX | Oil & Gas Property | Nov 2025 |
| 584 | OWENS | Upton County, TX | Oil & Gas Property | Nov 2025 |
| 585 | OWENS | Panola County, TX | Oil & Gas Property | Nov 2025 |
| 586 | OWENS | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 587 | OWENS | Ochiltree County, TX | Oil & Gas Property | Nov 2025 |
| 588 | OWENS | Upton County, TX | Oil & Gas Property | Nov 2025 |
| 589 | OWENS | Burleson County, TX | Oil & Gas Property | Nov 2025 |
| 590 | OWENS | Panola County, TX | Oil & Gas Property | Nov 2025 |
| 591 | OWENS | Reagan County, TX | Oil & Gas Property | Nov 2025 |
| 592 | OWENS | Wilbarger County, TX | Oil & Gas Property | Nov 2025 |
| 593 | OWENS | Shackelford County, TX | Oil & Gas Property | Nov 2025 |
| 594 | OWENS & SNOOT | Crane County, TX | Oil Property | Jan 2020 |
| 595 | OWENS 1 | San Augustine County, TX | Gas Property | Nov 2025 |
| 596 | OWENS 1-75 LOV | Loving County, TX | Oil & Gas Property | Nov 2025 |
| 597 | OWENS C | Freestone County, TX | Oil & Gas Property | Nov 2025 |
| 598 | OWENS E. ARLEIGH | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 599 | OWENS FELMONT | Upton County, TX | Oil & Gas Property | Jul 2022 |
| 600 | OWENS GAS UNIT | Freestone County, TX | Oil & Gas Property | Nov 2025 |