| 501 | SOUTH CALLAGHAN RANCH | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 502 | SOUTH CALLAGHAN RANCH | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 503 | SOUTH MARSHALL ST | Webb County, TX | Oil & Gas Property | May 2026 |
| 504 | SPOHN RANCH | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 505 | SPOHN RANCH 2 | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 506 | SRS UNIT | Webb County, TX | Gas Property | Jun 2026 |
| 507 | SSS-BURKHOLDER | Webb County, TX | Oil & Gas Property | May 2026 |
| 508 | STAGGS | Webb County, TX | Oil & Gas Property | May 2026 |
| 509 | STANFORD P. H | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 510 | STANLEY | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 511 | STATE EDITH | Webb County, TX | Gas Property | Jun 2026 |
| 512 | STATE M | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 513 | STATE OF TEXAS | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 514 | STATE OF TEXAS - HILL RANCH GU 4H | Webb County, TX | Gas Property | Jun 2026 |
| 515 | STATE OF TEXAS RAFTER O | Webb County, TX | Gas Property | Jun 2026 |
| 516 | STATE OF TEXAS RAFTER O UNIT | Webb County, TX | Gas Property | Jun 2026 |
| 517 | STATE SANTA FLORENTINA | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 518 | STATE-RUNNING W 598 | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 519 | STEWART | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 520 | STEWART STATE HACHAR GU | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 521 | STOKES | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 522 | STROMAN-ARMSTRONG | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 523 | SUMMERS BRUNI | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 524 | TATE-RAMIREZ | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 525 | TAUBMAN | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 526 | TEX-MEX RR CO | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 527 | TIJERINA | Webb County, TX | Oil & Gas Property | May 2026 |
| 528 | TREVINO | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 529 | TREVINO | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 530 | TREVINO RANCH | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 531 | TRIPHENE MIDDLETON | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 532 | TROST | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 533 | TRP A 300H | Webb County, TX | Gas Property | Jun 2026 |
| 534 | TRP B 101H | Webb County, TX | Gas Property | Jun 2026 |
| 535 | TRUST JAMES 95 | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 536 | TWO REPUBLICS | Webb County, TX | Oil & Gas Property | Aug 2021 |
| 537 | UNION RANCH | Webb County, TX | Oil & Gas Property | May 2026 |
| 538 | URIBE, ROSITA | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 539 | VAN ES | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 540 | VAQUILLAS | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 541 | VAQUILLAS | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 542 | VAQUILLAS | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 543 | VAQUILLAS RANCH | Webb County, TX | Oil & Gas Property | Apr 2026 |
| 544 | VAQUILLAS RANCH | Webb County, TX | Oil & Gas Property | Feb 2021 |
| 545 | VERGARA | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 546 | VERGARA L.B. STATE | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 547 | VERGARA-RAYZOR | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 548 | VILLAREAL | Webb County, TX | Oil & Gas Property | Jan 2019 |
| 549 | VILLARREAL | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 550 | VILLARREAL | Webb County, TX | Oil & Gas Property | May 2026 |
| 551 | VILLARREAL | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 552 | VOLPE | Webb County, TX | Oil & Gas Property | Dec 2022 |
| 553 | VOLZ 1125 | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 554 | VOLZ-MARTIN | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 555 | VOLZ-STATE | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 556 | VT BENAVIDES 10 | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 557 | VT DAWSON | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 558 | VT FASKEN L. & M. ST OF TX | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 559 | VT GARNER | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 560 | VT HUNTER LARRY T. ET AL | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 561 | VT J. MARTIN ST OF TX | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 562 | VT JAMES | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 563 | VT JAMES S. A. ESTATE | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 564 | VT JOHNS E. S | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 565 | VT JOHNS-STOKES UNIT | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 566 | VT LUNDELL MINERALS | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 567 | VT M. MARTIN ST OF TX 490 | Webb County, TX | Gas Property | Jun 2026 |
| 568 | VT MANRY | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 569 | VT MARTIN TRUST S ST OF TX 660 | Webb County, TX | Gas Property | Jun 2026 |
| 570 | VT PALAFOX EXPLORATION CO | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 571 | VT RAMIREZ | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 572 | VT SLAUGHTER-WALKER | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 573 | VT TRIPHENE MIDDLETON ET AL | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 574 | VT ZUCK SALLY ST OF TX 8 | Webb County, TX | Gas Property | Jun 2026 |
| 575 | WALKER | Webb County, TX | Oil & Gas Property | Jan 2009 |
| 576 | WALTER DESPAIN 12 | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 577 | WARREN | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 578 | WATSON | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 579 | WATSON (SA | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 580 | WATSON GU | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 581 | WEBB COUNTY SC | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 582 | WEBB COUNTY SCHOOL | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 583 | WELHAUSEN J | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 584 | WEST COLE FIELD UNIT | Webb County, TX | Oil & Gas Property | May 2026 |
| 585 | WEST COLE NORTH UNIT | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 586 | WHEATLEY | Webb County, TX | Oil & Gas Property | Dec 2023 |
| 587 | WILLIAMSON S | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 588 | WILSON ABE | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 589 | WINCH | Webb County, TX | Oil & Gas Property | May 2025 |
| 590 | WM JAMES TRUST | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 591 | WM WEBB COUNTY SCHOOL LAND | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 592 | WNH JR LAND CO LTD | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 593 | WNH JR LAND CO LTD 10 | Webb County, TX | Gas Property | Jun 2026 |
| 594 | WNH-LM 1870 PSA 10 | Webb County, TX | Gas Property | Jun 2026 |
| 595 | WNH-MB PSA 10 | Webb County, TX | Gas Property | Jun 2026 |
| 596 | WORTHEY RANCH | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 597 | WRIGHT LAND & CATTLE | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 598 | WRIGHT-LONG GAS UNIT | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 599 | YATES | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 600 | ZACHRY | Webb County, TX | Oil & Gas Property | Jun 2026 |