| 501 | NEAL B UNIT 8 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 502 | NEAL C | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 503 | NEAL D UNIT 8 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 504 | NEAL ESTATE | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 505 | NEAL F UNIT 8 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 506 | NEAL HEIRS | Upton County, TX | Oil & Gas Property | Jul 2022 |
| 507 | NEAL RANCH | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 508 | NEAL-POWELL UNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 509 | NEFF EAST | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 510 | NEFF WEST | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 511 | NICKEL SALOON | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 512 | NIGHT FLIGHT 4738 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 513 | NORMA | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 514 | NORMA P1 UNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 515 | NORMA UNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 516 | NORTH BROOK | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 517 | NORTH PEMBROOK SPRABERRYUNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 518 | OBERHOLTZER | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 519 | OHARROW | Upton County, TX | Oil & Gas Property | Mar 2024 |
| 520 | OLD BLUE 25 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 521 | ONEAL B. J. -NORTH | Upton County, TX | Oil & Gas Property | Jan 2017 |
| 522 | ONEAL B. J. ETAL | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 523 | ONEAL SAN ANDRES UNIT | Upton County, TX | Oil & Gas Property | Jan 2017 |
| 524 | ONEAL,BILL JOHN NE/4 SEC 5 UN | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 525 | OWENS | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 526 | OWENS | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 527 | OWENS FELMONT | Upton County, TX | Oil & Gas Property | Jul 2022 |
| 528 | OWENS-CRAVENS | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 529 | OWENS-TAYLOR 31 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 530 | PATTY | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 531 | PAULA | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 532 | PAULINE | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 533 | PEARL 11-30 | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 534 | PECK | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 535 | PECK | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 536 | PEGASUS | Upton County, TX | Oil & Gas Property | May 2025 |
| 537 | PEGASUS ELLENBURGER UNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 538 | PEGASUS FIELD UN | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 539 | PEGASUS PENNSYLVANIAN UNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 540 | PEGASUS SPRABERRY UNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 541 | PEMBROOK | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 542 | PEMBROOK | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 543 | PEMBROOK | Upton County, TX | Oil & Gas Property | Dec 2018 |
| 544 | PENNY | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 545 | PENNYWISE | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 546 | PERIDOT 101 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 547 | POLARIS 4750 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 548 | PONDEROSA | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 549 | POWELL | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 550 | POWELL | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 551 | POWELL VIRGIL | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 552 | POWELL-NEAL UNIT | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 553 | PRIEST | Upton County, TX | Oil & Gas Property | Jan 2023 |
| 554 | PROCTOR | Upton County, TX | Oil & Gas Property | Oct 2022 |
| 555 | QUAIL HOLLOW 174 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 556 | QUAIL RANCH | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 557 | R S WINDHAM | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 558 | R.A.B. DAVIDSON | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 559 | RAB 34 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 560 | RACHEAL | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 561 | RADFORD GROCERY | Upton County, TX | Oil & Gas Property | Jan 2010 |
| 562 | RAILWAY RANCH | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 563 | RANKIN | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 564 | RANKIN MIPA | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 565 | RATLIFF | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 566 | RATLIFF | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 567 | RATLIFF 3 | Upton County, TX | Oil & Gas Property | Feb 2025 |
| 568 | RATLIFF 9-7 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 569 | RAY REED 3 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 570 | REAGAN | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 571 | REBECCA JEAN | Upton County, TX | Oil & Gas Property | Nov 2024 |
| 572 | REESE | Upton County, TX | Oil & Gas Property | Dec 1996 |
| 573 | REESE 15 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 574 | RENEGADE | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 575 | REXENE | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 576 | REYNOLDS | Upton County, TX | Oil & Gas Property | Aug 2023 |
| 577 | RHONDA | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 578 | RICKER | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 579 | RINN | Upton County, TX | Oil & Gas Property | Oct 2022 |
| 580 | ROBBIE 17 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 581 | ROBBIE JANE | Upton County, TX | Oil & Gas Property | Jun 2023 |
| 582 | ROBBINS | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 583 | ROGERS 3-40 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 584 | ROGERS 35 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 585 | ROSS | Upton County, TX | Oil & Gas Property | Jan 2025 |
| 586 | ROSS R.L | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 587 | RUHMAN E. P | Upton County, TX | Oil & Gas Property | May 2021 |
| 588 | RWT BUFFALO BAYOU 16-4 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 589 | RYBURN C.W. A/C 2 | Upton County, TX | Oil & Gas Property | Jul 2024 |
| 590 | SABO | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 591 | SADIE 07-08 | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 592 | SALLYE | Upton County, TX | Oil & Gas Property | Jun 2025 |
| 593 | SAMANTHA | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 594 | SAMMIE 47 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 595 | SANDY | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 596 | SANDY REXENE (SA) | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 597 | SANGER-BROTHERS | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 598 | SAPPHIRE 102 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 599 | SARAH | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 600 | SARAH 27 | Upton County, TX | Oil & Gas Property | Oct 2025 |