| 501 | ACKERMAN | Weston County, WY | Oil & Gas Property | Feb 2019 |
| 502 | ACKERS | Stephens County, TX | Oil & Gas Property | Mar 2019 |
| 503 | ACKERS | Shackelford County, TX | Oil & Gas Property | Mar 2019 |
| 504 | ACKERS 80 | Callahan County, TX | Oil & Gas Property | Mar 2019 |
| 505 | ACKERS MORRIS SAND UNIT | Shackelford County, TX | Oil & Gas Property | Mar 2019 |
| 506 | ACKERS RANCH 26 TANNEHILL SD. U | Shackelford County, TX | Oil & Gas Property | Jan 2019 |
| 507 | ACKERS-STATE (CADDO) UNIT | Stephens County, TX | Oil & Gas Property | May 2000 |
| 508 | ACKLEY | Cattaraugus County, NY | Gas Property | Dec 2017 |
| 509 | ACKLINS 6092 12-18H | Burke County, ND | Oil & Gas Property | Apr 2019 |
| 510 | ACLA | Bradford County, PA | Gas Property | Mar 2019 |
| 511 | ACLCO HAY G.U. 2 1H | Angelina County, TX | Gas Property | Mar 2019 |
| 512 | ACLCO HAY GU 1H | Angelina County, TX | Gas Property | Mar 2019 |
| 513 | ACLCO UNIT | Nacogdoches County, TX | Gas Property | Mar 2019 |
| 514 | ACLETO CREEK WATERFLOOD UNIT | Wilson County, TX | Oil & Gas Property | Mar 2019 |
| 515 | ACME | Los Angeles County, CA | Oil & Gas Property | Dec 2017 |
| 516 | ACME | Kern County, CA | Oil Property | Feb 2018 |
| 517 | ACME | Chaves County, NM | Gas Property | Jan 2019 |
| 518 | ACME 10 FEDERAL | Eddy County, NM | Oil & Gas Property | Dec 2018 |
| 519 | ACME 15 FEDERAL COM | Eddy County, NM | Oil & Gas Property | Jan 2019 |
| 520 | ACME BRICK | Nacogdoches County, TX | Gas Property | Mar 2019 |
| 521 | ACME BRICK | Denton County, TX | Gas Property | Mar 2019 |
| 522 | ACME BRICK | Sebastian County, AR | Gas Property | Feb 2019 |
| 523 | ACME LOT 420 | McKean County, PA | Oil Property | Dec 1995 |
| 524 | ACME UNIT | Denton County, TX | Gas Property | Mar 2019 |
| 525 | ACOCK BP JOHNSON 21 | Jasper County, TX | Oil & Gas Property | Mar 2019 |
| 526 | ACOLA | Wise County, TX | Gas Property | Mar 2019 |
| 527 | ACOLA A -NEIL (SA) 1 | Wise County, TX | Gas Property | Mar 2019 |
| 528 | ACOLA B -ACOLA A (SA) 1H | Wise County, TX | Gas Property | Mar 2019 |
| 529 | ACOLA C - ACOLA | Wise County, TX | Gas Property | Mar 2019 |
| 530 | ACOLA-ACOLA A (SA) 1H | Wise County, TX | Gas Property | Mar 2019 |
| 531 | ACOM | Chambers County, TX | Oil & Gas Property | Mar 2019 |
| 532 | ACORD | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 533 | ACORN | Ventura County, CA | Oil & Gas Property | Aug 2006 |
| 534 | ACORN | Fresno County, CA | Oil Property | Jul 1991 |
| 535 | ACORN FAMILY | Johnson County, TX | Gas Property | Mar 2019 |
| 536 | ACORN UNIT | Dundy County, NE | Oil Property | Dec 2018 |
| 537 | ACOSTA | Borden County, TX | Oil & Gas Property | Mar 2019 |
| 538 | ACRE | Blaine County, OK | Gas Property | Aug 1998 |
| 539 | ACRE LAND CO | Cabell County, WV | Oil & Gas Property | Dec 2017 |
| 540 | ACREE | Jack County, TX | Oil & Gas Property | Mar 2019 |
| 541 | ACREE, AUSTIN | Metcalfe County, KY | Oil Property | Nov 2015 |
| 542 | ACRES 05 229 0 | Bradford County, PA | Gas Property | Apr 2019 |
| 543 | ACREY | Eddy County, NM | Oil Property | Oct 2018 |
| 544 | ACT A | Martin County, TX | Oil & Gas Property | Mar 2019 |
| 545 | ACT B | Martin County, TX | Oil & Gas Property | Mar 2019 |
| 546 | ACT D | Martin County, TX | Oil & Gas Property | Mar 2019 |
| 547 | ACT E | Martin County, TX | Oil & Gas Property | Mar 2019 |
| 548 | ACT F | Martin County, TX | Oil & Gas Property | Mar 2019 |
| 549 | ACT G | Martin County, TX | Oil & Gas Property | Mar 2019 |
| 550 | ACT RANCH | Bastrop County, TX | Oil & Gas Property | Mar 2019 |
| 551 | ACTION BTI STATE COM | Lea County, NM | Oil & Gas Property | Jan 2019 |
| 552 | ACTON | Bradford County, PA | Gas Property | Mar 2019 |
| 553 | ACTON 23-7-2 | Jefferson County, OH | Gas Property | Mar 2019 |
| 554 | ACTON MEADOWS | Hood County, TX | Gas Property | Mar 2019 |
| 555 | ACTON, PAM | Crockett County, TX | Gas Property | Feb 2019 |
| 556 | ACU 3 | Terrell County, TX | Gas Property | Mar 2019 |
| 557 | ACU 4 | Terrell County, TX | Gas Property | Mar 2019 |
| 558 | ACU 5 | Andrews County, TX | Oil & Gas Property | Mar 2019 |
| 559 | ACW BRA | Bradford County, PA | Gas Property | Mar 2019 |
| 560 | AD 1H | Denton County, TX | Gas Property | Mar 2019 |
| 561 | ADA BELLE | Hardin County, TX | Oil & Gas Property | Feb 2019 |
| 562 | ADAH - CAUTHORN 10A | Val Verde County, TX | Gas Property | Mar 2019 |
| 563 | ADAIR | Hocking County, OH | Oil Property | Dec 2018 |
| 564 | ADAIR | San Juan County, NM | Oil & Gas Property | Dec 2018 |
| 565 | ADAIR | Nowata County, OK | Gas Property | Aug 2014 |
| 566 | ADAIR SAN ANDRES UNIT | Gaines County, TX | Oil & Gas Property | Mar 2019 |
| 567 | ADAIR SE (SAN ANDRES) UNIT | Gaines County, TX | Oil & Gas Property | Mar 2019 |
| 568 | ADAIR VELA | Madison County, TX | Gas Property | Mar 2019 |
| 569 | ADAIR WOLFCAMP UNIT | Gaines County, TX | Oil & Gas Property | Mar 2019 |
| 570 | ADAM | Ector County, TX | Oil & Gas Property | Mar 2019 |
| 571 | ADAM | Pittsburg County, OK | Gas Property | Mar 2019 |
| 572 | ADAM | McIntosh County, OK | Gas Property | Aug 2011 |
| 573 | ADAM "34" | Upton County, TX | Oil & Gas Property | Apr 2017 |
| 574 | ADAM 1-26F | Bowman County, ND | Oil & Gas Property | Apr 2019 |
| 575 | ADAM COM | San Juan County, NM | Gas Property | Jan 2019 |
| 576 | ADAM EIDEMILLER INC | Westmoreland County, PA | Oil & Gas Property | Dec 2018 |
| 577 | ADAM ELL | Dunn County, ND | Oil & Gas Property | Apr 2019 |
| 578 | ADAM FARM | Weld County, CO | Oil & Gas Property | Apr 2018 |
| 579 | ADAM FEDERAL | Campbell County, WY | Oil & Gas Property | Mar 2019 |
| 580 | ADAM GOOD BEAR 15-22H | Mountrail County, ND | Oil & Gas Property | Apr 2019 |
| 581 | ADAM RED D26-1 | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 582 | ADAM STINSON UNIT | Somervell County, TX | Gas Property | Mar 2019 |
| 583 | ADAMC /BEND/ UNIT | Upton County, TX | Oil & Gas Property | Mar 2019 |
| 584 | ADAMC/DEVONI | Upton County, TX | Oil & Gas Property | Mar 2019 |
| 585 | ADAMCHIK | Indiana County, PA | Gas Property | Dec 2018 |
| 586 | ADAMCIK 1 | Wharton County, TX | Gas Property | Mar 2019 |
| 587 | ADAME G | Hidalgo County, TX | Gas Property | Mar 2019 |
| 588 | ADAMEK UNIT | Dewitt County, TX | Gas Property | Mar 2019 |
| 589 | ADAMEK UNIT | Gonzales County, TX | Oil & Gas Property | Mar 2019 |
| 590 | ADAMI | Coleman County, TX | Oil & Gas Property | Mar 2019 |
| 591 | ADAMI | Johnson County, WY | Gas Property | Apr 2019 |
| 592 | ADAMI FRANCISCA | Webb County, TX | Oil & Gas Property | Mar 2019 |
| 593 | ADAMI G. E | Denton County, TX | Gas Property | Mar 2019 |
| 594 | ADAMITZ W | Atascosa County, TX | Oil & Gas Property | Mar 2019 |
| 595 | ADAMS | Hughes County, OK | Gas Property | Mar 2019 |
| 596 | ADAMS | Haskell County, OK | Gas Property | Apr 2019 |
| 597 | ADAMS | Latimer County, OK | Gas Property | Apr 2019 |
| 598 | ADAMS | Medina County, TX | Oil & Gas Property | Mar 2019 |
| 599 | ADAMS | Ventura County, CA | Oil & Gas Property | May 1990 |
| 600 | ADAMS | Lafayette County, AR | Oil Property | Dec 1990 |