| 5501 | DUNCAN | Duchesne County, UT | Oil & Gas Property | Jul 2025 |
| 5502 | DUNCAN | Matagorda County, TX | Oil & Gas Property | Jul 2025 |
| 5503 | DUNCAN | Brown County, TX | Oil & Gas Property | Jun 2014 |
| 5504 | DUNCAN | Okmulgee County, OK | Oil & Gas Property | Dec 2008 |
| 5505 | DUNCAN | Gregg County, TX | Oil & Gas Property | Jul 2025 |
| 5506 | DUNCAN | Carson County, TX | Gas Property | Jul 2025 |
| 5507 | DUNCAN 1 | Uintah County, UT | Oil & Gas Property | Jul 2025 |
| 5508 | DUNCAN 19 | Lea County, NM | Oil & Gas Property | Jul 2025 |
| 5509 | DUNCAN 2-34A1 | Uintah County, UT | Oil & Gas Property | Jul 2025 |
| 5510 | DUNCAN 9 | Howard County, TX | Oil & Gas Property | May 2025 |
| 5511 | DUNCAN D | Wharton County, TX | Oil & Gas Property | Jul 2025 |
| 5512 | DUNCAN D 1 | Weld County, CO | Oil & Gas Property | Oct 2020 |
| 5513 | DUNCAN D 20 | Weld County, CO | Oil & Gas Property | Apr 2018 |
| 5514 | DUNCAN FED | Uintah County, UT | Gas Property | Jul 2025 |
| 5515 | DUNCAN FEDERAL | Chaves County, NM | Oil Property | Jul 2019 |
| 5516 | DUNCAN FEDERAL | McKenzie County, ND | Oil & Gas Property | Dec 2020 |
| 5517 | DUNCAN FORK | Washington County, PA | Oil & Gas Property | Dec 2024 |
| 5518 | DUNCAN GARDNER | Love County, OK | Oil & Gas Property | Jul 2024 |
| 5519 | DUNCAN GAS UNIT | Robertson County, TX | Oil & Gas Property | Jul 2025 |
| 5520 | DUNCAN J.J. GAS UNIT | Robertson County, TX | Oil & Gas Property | Jul 2025 |
| 5521 | DUNCAN LH FEDERAL | Chaves County, NM | Oil & Gas Property | Jul 2025 |
| 5522 | DUNCAN SHORES | Coal County, OK | Oil & Gas Property | Jun 2025 |
| 5523 | DUNCAN STATE COM | Chaves County, NM | Oil & Gas Property | Aug 2025 |
| 5524 | DUNCAN UNIT | Tarrant County, TX | Oil & Gas Property | Jul 2025 |
| 5525 | DUNCAN UNIT | Karnes County, TX | Oil & Gas Property | Jul 2025 |
| 5526 | DUNCAN UNIT | Lea County, NM | Oil & Gas Property | Aug 1996 |
| 5527 | DUNCAN UNIT | Karnes County, TX | Oil & Gas Property | Jul 2025 |
| 5528 | DUNCAN VANSCHAICK | Moffat County, CO | Oil & Gas Property | Aug 2025 |
| 5529 | DUNCAN W. C | Jack County, TX | Oil & Gas Property | Apr 2025 |
| 5530 | DUNCAN, M E | Henderson County, KY | Oil Property | Dec 2020 |
| 5531 | DUNCAN, R | Henderson County, KY | Oil Property | Dec 2018 |
| 5532 | DUNCAN, S | Webster County, KY | Oil Property | Dec 2022 |
| 5533 | DUNCAN-BEAVERS ET AL UNIT | Coleman County, TX | Oil & Gas Property | Jul 2025 |
| 5534 | DUNCAN-WEMPLE | De Soto Parish, LA | Gas Property | Dec 2024 |
| 5535 | DUNDEE 4 FEDERAL COM | Eddy County, NM | Oil & Gas Property | Jul 2025 |
| 5536 | DUNDEE LAND & COAL | Tuscarawas County, OH | Oil & Gas Property | Dec 2022 |
| 5537 | DUNDER | McIntosh County, OK | Oil & Gas Property | Jun 2025 |
| 5538 | DUNDICS UNIT | Mahoning County, OH | Oil & Gas Property | Dec 2024 |
| 5539 | DUNDY STATE | Dundy County, NE | Oil Property | Dec 2024 |
| 5540 | DUNE | Beaver County, OK | Oil & Gas Property | Jun 2025 |
| 5541 | DUNE | McClain County, OK | Oil & Gas Property | Jun 2025 |
| 5542 | DUNE RIDGE | Logan County, CO | Oil & Gas Property | Feb 2015 |
| 5543 | DUNE UNIT | La Salle County, TX | Oil & Gas Property | Jul 2025 |
| 5544 | DUNES | Morris County, TX | Oil & Gas Property | Jul 2025 |
| 5545 | DUNES | Winkler County, TX | Oil & Gas Property | Jul 2025 |
| 5546 | DUNFEE | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 5547 | DUNFORD 14-10H | Dunn County, ND | Oil & Gas Property | Aug 2025 |
| 5548 | DUNGAN | Grady County, OK | Oil & Gas Property | Jul 2025 |
| 5549 | DUNGAN | Lee County, TX | Oil & Gas Property | Jul 2025 |
| 5550 | DUNGAN 32-5 5 | Archuleta County, CO | Gas Property | Jul 2025 |
| 5551 | DUNGAN-KEY TRUST | San Patricio County, TX | Oil & Gas Property | Jul 2025 |
| 5552 | DUNHAM | Montgomery County, KS | Gas Property | Nov 2024 |
| 5553 | DUNHAM | Wayne County, OH | Oil & Gas Property | Dec 2024 |
| 5554 | DUNHAM | Bradford County, PA | Gas Property | Jul 2025 |
| 5555 | DUNHAM | Young County, TX | Oil & Gas Property | Jul 2025 |
| 5556 | DUNHAM DAVID | Panola County, TX | Oil & Gas Property | Jul 2025 |
| 5557 | DUNHAM, MITCHELL ET AL DUNHAM | Taylor County, WV | Oil & Gas Property | Dec 2021 |
| 5558 | DUNHAM-LEM | Chautauqua County, KS | Oil Property | May 2025 |
| 5559 | DUNIGAN | Reeves County, TX | Oil & Gas Property | Jul 2025 |
| 5560 | DUNIGAN 445 | Yoakum County, TX | Oil Property | Jul 2025 |
| 5561 | DUNIGAN STATE UNIT | Reeves County, TX | Oil & Gas Property | Jul 2025 |
| 5562 | DUNKEL | Russell County, KS | Oil Property | Dec 2023 |
| 5563 | DUNKIN | Wagoner County, OK | Gas Property | May 2019 |
| 5564 | DUNKIN | Wagoner County, OK | Oil & Gas Property | May 2019 |
| 5565 | DUNKIN | Garvin County, OK | Oil Property | Jun 2025 |
| 5566 | DUNKIN UNIT | Howard County, TX | Oil & Gas Property | Jul 2025 |
| 5567 | DUNKIN UNIT | Lee County, TX | Oil & Gas Property | Jul 2025 |
| 5568 | DUNKIRK 1-18 | Billings County, ND | Oil & Gas Property | Aug 2025 |
| 5569 | DUNKIRK UNIT | Irion County, TX | Oil & Gas Property | Jul 2025 |
| 5570 | DUNKLE | Butler County, KS | Oil Property | Jun 2025 |
| 5571 | DUNKLE'A' | Morton County, KS | Oil & Gas Property | Mar 2025 |
| 5572 | DUNKLEMAN | Cattaraugus County, NY | Gas Property | Dec 2024 |
| 5573 | DUNKLIN STANLEY J | Rusk County, TX | Oil & Gas Property | Jul 2025 |
| 5574 | DUNKS | Harris County, TX | Oil & Gas Property | Dec 2024 |
| 5575 | DUNLAP | Seward County, KS | Oil & Gas Property | Apr 2009 |
| 5576 | DUNLAP | Wood County, WV | Oil & Gas Property | Dec 2021 |
| 5577 | DUNLAP | Licking County, OH | Oil & Gas Property | Dec 2024 |
| 5578 | DUNLAP | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 5579 | DUNLAP | Crockett County, TX | Oil & Gas Property | Jul 2025 |
| 5580 | DUNLAP | Freestone County, TX | Oil & Gas Property | Jul 2025 |
| 5581 | DUNLAP | Pecos County, TX | Oil & Gas Property | Jul 2025 |
| 5582 | DUNLAP | Stephens County, OK | Oil Property | Jun 2025 |
| 5583 | DUNLAP | Carter County, OK | Oil Property | Apr 2025 |
| 5584 | DUNLAP | Guernsey County, OH | Oil & Gas Property | Dec 2024 |
| 5585 | DUNLAP | Los Angeles County, CA | Oil & Gas Property | Aug 2025 |
| 5586 | DUNLAP | Greenwood County, KS | Oil Property | Jun 2025 |
| 5587 | DUNLAP | Morrill County, NE | Oil & Gas Property | Feb 2024 |
| 5588 | DUNLAP | Creek County, OK | Oil Property | Jun 2025 |
| 5589 | DUNLAP | Jack County, TX | Oil & Gas Property | Jul 2025 |
| 5590 | DUNLAP | Dimmit County, TX | Oil & Gas Property | Jul 2025 |
| 5591 | DUNLAP | Stevens County, KS | Oil & Gas Property | Jun 2025 |
| 5592 | DUNLAP | Campbell County, WY | Oil & Gas Property | Jul 2025 |
| 5593 | DUNLAP | Love County, OK | Oil Property | Nov 2006 |
| 5594 | DUNLAP | Indiana County, PA | Gas Property | Dec 2024 |
| 5595 | DUNLAP | Stevens County, KS | Gas Property | Jun 2025 |
| 5596 | DUNLAP | Rooks County, KS | Oil Property | May 2025 |
| 5597 | DUNLAP 5693 44-12B | Mountrail County, ND | Oil & Gas Property | Aug 2025 |
| 5598 | DUNLAP B.H | Jim Wells County, TX | Oil & Gas Property | Jul 2025 |
| 5599 | DUNLAP BLACKJACK THICKET | Jack County, TX | Oil & Gas Property | Mar 2025 |
| 5600 | DUNLAP GAS UNIT | Freestone County, TX | Oil & Gas Property | Jul 2025 |