| 501 | ABSTON | Foard County, TX | Gas Property | Jan 2026 |
| 502 | ABSTON | Tuscaloosa County, AL | Gas Property | Feb 2026 |
| 503 | ABSTON UNIT 10 | Choctaw County, AL | Oil & Gas Property | Jul 2008 |
| 504 | ABU GARCIA 28-16 | Martin County, TX | Oil & Gas Property | Feb 2026 |
| 505 | ABUKHURMA ADEL | Bexar County, TX | Oil Property | Jan 2026 |
| 506 | ABUNDANCE AVZ | Eddy County, NM | Oil & Gas Property | Feb 2026 |
| 507 | AC MCLAUGHLIN | Rio Blanco County, CO | Oil & Gas Property | Jan 2026 |
| 508 | AC RANCH | Sheridan County, WY | Gas Property | Jun 2015 |
| 509 | AC RANCH | Sheridan County, WY | Gas Property | Jun 2015 |
| 510 | AC WALTERS | Grady County, OK | Oil & Gas Property | Jan 2026 |
| 511 | AC WISE | Butler County, PA | Oil Property | Dec 2025 |
| 512 | ACAA | Allegheny County, PA | Gas Property | Feb 2026 |
| 513 | ACACIA 17 | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 514 | ACACIA COUNTRY CLUB | Cuyahoga County, OH | Oil & Gas Property | Dec 2024 |
| 515 | ACACIA CS FED | Campbell County, WY | Gas Property | Aug 2018 |
| 516 | ACACIA UNIT 1H | Fayette County, TX | Oil & Gas Property | Feb 2026 |
| 517 | ACADIA | Gonzales County, TX | Oil & Gas Property | Feb 2026 |
| 518 | ACADIA 13-12-12-6 | Canadian County, OK | Oil & Gas Property | Feb 2026 |
| 519 | ACADIA 148-95-02A-11H TF | Dunn County, ND | Oil & Gas Property | Feb 2026 |
| 520 | ACADIA 1H | Washington County, TX | Oil & Gas Property | Feb 2026 |
| 521 | ACADIA 65 | Fisher County, TX | Oil & Gas Property | Feb 2026 |
| 522 | ACADIA B | Acadia Parish, LA | Oil Property | Dec 2024 |
| 523 | ACADIA FEDERAL COM | Eddy County, NM | Oil & Gas Property | Feb 2026 |
| 524 | ACADIAN 0806 | Grady County, OK | Oil & Gas Property | Jan 2026 |
| 525 | ACCAWINNA | Duchesne County, UT | Oil & Gas Property | Feb 2026 |
| 526 | ACCAWINNA UT 2-3 3-2-34-27 | Duchesne County, UT | Oil & Gas Property | Feb 2026 |
| 527 | ACCETTOLO, PATRICIA & LOUIS | Marshall County, WV | Oil & Gas Property | Dec 2021 |
| 528 | ACDC | Atascosa County, TX | Oil & Gas Property | Feb 2026 |
| 529 | ACE 149-92-31D-30H | Dunn County, ND | Oil & Gas Property | Feb 2026 |
| 530 | ACE E CDZ HR 8H | Harrison County, OH | Oil & Gas Property | Dec 2025 |
| 531 | ACE IN THE HOLE | Reeves County, TX | Oil & Gas Property | Feb 2026 |
| 532 | ACE L06H | Reeves County, TX | Oil & Gas Property | Feb 2026 |
| 533 | ACE STERN VEGAS FEE 22 21 | Eddy County, NM | Oil & Gas Property | Feb 2026 |
| 534 | ACE UNIT | Denton County, TX | Oil & Gas Property | Feb 2026 |
| 535 | ACE UNIT | Moffat County, CO | Oil & Gas Property | Jan 2026 |
| 536 | ACE W CDZ HR | Harrison County, OH | Oil & Gas Property | Dec 2025 |
| 537 | ACEE PURE MILK CO | Logan County, AR | Gas Property | Jun 2024 |
| 538 | ACELA | Zapata County, TX | Gas Property | Feb 2026 |
| 539 | ACERNI | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 540 | ACERNI | Armstrong County, PA | Gas Property | Dec 2025 |
| 541 | ACES HIGH | Kingfisher County, OK | Oil & Gas Property | Jan 2026 |
| 542 | ACEVEDO-HAERING | Webb County, TX | Oil & Gas Property | Feb 2026 |
| 543 | ACHATZ | Barton County, KS | Oil Property | Dec 2025 |
| 544 | ACHEN FREY DM | Eddy County, NM | Oil & Gas Property | Dec 2016 |
| 545 | ACHENBACH | Barber County, KS | Oil & Gas Property | Dec 2025 |
| 546 | ACHENBACH | Woods County, OK | Oil & Gas Property | Feb 2026 |
| 547 | ACHENBACH | Barber County, KS | Oil & Gas Property | Dec 2025 |
| 548 | ACHENBACH | Barber County, KS | Oil & Gas Property | Dec 2025 |
| 549 | ACHERON | Shelby County, TX | Oil & Gas Property | Feb 2026 |
| 550 | ACHESON | Graham County, KS | Oil Property | Dec 2025 |
| 551 | ACHILLES 5301 | McKenzie County, ND | Oil & Gas Property | Feb 2026 |
| 552 | ACHILLES 7-24 UNIT 1 | Martin County, TX | Oil & Gas Property | Feb 2026 |
| 553 | ACHTERBERG ANTON | Guadalupe County, TX | Oil & Gas Property | Feb 2026 |
| 554 | ACHZIGER | Weld County, CO | Oil & Gas Property | Apr 2020 |
| 555 | ACIN ALLEN&PRYOR | Boone County, WV | Gas Property | Dec 2021 |
| 556 | ACIN LL | Kanawha County, WV | Oil & Gas Property | Dec 2021 |
| 557 | ACIN LLC | Letcher County, KY | Oil & Gas Property | Nov 2023 |
| 558 | ACIN LLC ALLEN&PRYOR | Boone County, WV | Oil & Gas Property | Dec 2021 |
| 559 | ACIN, LLC 16 | Letcher County, KY | Gas Property | Dec 2019 |
| 560 | ACKBAR 30 31 | Lea County, NM | Oil & Gas Property | Jan 2025 |
| 561 | ACKER | Gray County, TX | Oil & Gas Property | Feb 2026 |
| 562 | ACKER | Fayette County, TX | Oil & Gas Property | Feb 2026 |
| 563 | ACKER | Pittsburg County, OK | Gas Property | Jan 2026 |
| 564 | ACKER | Rusk County, TX | Oil & Gas Property | Feb 2026 |
| 565 | ACKER | Manistee County, MI | Oil & Gas Property | Sep 2025 |
| 566 | ACKER | Campbell County, WY | Gas Property | Apr 2016 |
| 567 | ACKER | Hocking County, OH | Oil Property | Dec 2022 |
| 568 | ACKER | Wayne County, OH | Oil & Gas Property | Dec 2017 |
| 569 | ACKER #12 | Tuscaloosa County, AL | Gas Property | Feb 2026 |
| 570 | ACKER C | Susquehanna County, PA | Gas Property | Feb 2026 |
| 571 | ACKERLY | Martin County, TX | Oil & Gas Property | Feb 2026 |
| 572 | ACKERLY DAVENPORT 16A | Martin County, TX | Oil & Gas Property | Feb 2026 |
| 573 | ACKERLY/DEAN/FIELD UNIT | Dawson County, TX | Oil & Gas Property | Feb 2026 |
| 574 | ACKERMAN | Allegany County, NY | Oil & Gas Property | Dec 2024 |
| 575 | ACKERMAN | Stafford County, KS | Gas Property | Dec 2025 |
| 576 | ACKERMAN | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 577 | ACKERMAN | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 578 | ACKERMAN | Gray County, TX | Gas Property | Feb 2026 |
| 579 | ACKERMAN | Grant County, KS | Gas Property | Dec 2025 |
| 580 | ACKERMAN | Weston County, WY | Oil & Gas Property | Mar 2026 |
| 581 | ACKERS | Stephens County, TX | Oil & Gas Property | Feb 2026 |
| 582 | ACKERS | Shackelford County, TX | Oil & Gas Property | Dec 2025 |
| 583 | ACKERS (MORRIS SAND) UNIT | Shackelford County, TX | Oil & Gas Property | Jan 2025 |
| 584 | ACKERS 80 | Callahan County, TX | Oil & Gas Property | Feb 2026 |
| 585 | ACKERS-STATE (CADDO) UNIT | Stephens County, TX | Oil & Gas Property | May 2000 |
| 586 | ACKLEY | Cattaraugus County, NY | Gas Property | Dec 2024 |
| 587 | ACKLINS 6092 12-18H | Burke County, ND | Oil & Gas Property | Feb 2026 |
| 588 | ACL UNIT | Martin County, TX | Oil & Gas Property | Feb 2026 |
| 589 | ACLA | Bradford County, PA | Gas Property | Feb 2026 |
| 590 | ACLCO UNIT | Nacogdoches County, TX | Gas Property | Feb 2026 |
| 591 | ACLETO CREEK WATERFLOOD UNIT | Wilson County, TX | Oil & Gas Property | Feb 2026 |
| 592 | ACME | Los Angeles County, CA | Oil & Gas Property | Apr 2020 |
| 593 | ACME | Kern County, CA | Oil Property | Feb 2026 |
| 594 | ACME | Chaves County, NM | Gas Property | Feb 2026 |
| 595 | ACME 10 FEDERAL | Eddy County, NM | Oil & Gas Property | Dec 2018 |
| 596 | ACME 15 FEDERAL COM | Eddy County, NM | Oil & Gas Property | Feb 2026 |
| 597 | ACME BRICK | Nacogdoches County, TX | Oil & Gas Property | Feb 2026 |
| 598 | ACME BRICK | Denton County, TX | Oil & Gas Property | Feb 2026 |
| 599 | ACME BRICK | Sebastian County, AR | Gas Property | Jun 2024 |
| 600 | ACME LOT 420 | McKean County, PA | Oil Property | Dec 1995 |