| 5401 | DUNCAN | Pittsburg County, OK | Gas Property | Apr 2026 |
| 5402 | DUNCAN | Texas County, OK | Gas Property | Apr 2026 |
| 5403 | DUNCAN | Campbell County, WY | Oil & Gas Property | Jun 2017 |
| 5404 | DUNCAN | Duchesne County, UT | Oil & Gas Property | Jun 2026 |
| 5405 | DUNCAN | Matagorda County, TX | Oil & Gas Property | Apr 2026 |
| 5406 | DUNCAN | Okmulgee County, OK | Oil & Gas Property | Dec 2008 |
| 5407 | DUNCAN | Gregg County, TX | Oil & Gas Property | May 2026 |
| 5408 | DUNCAN | Carson County, TX | Gas Property | May 2026 |
| 5409 | DUNCAN 1 | Uintah County, UT | Oil & Gas Property | May 2026 |
| 5410 | DUNCAN 19 | Lea County, NM | Oil & Gas Property | May 2026 |
| 5411 | DUNCAN 2-34A1 | Uintah County, UT | Oil & Gas Property | Jun 2026 |
| 5412 | DUNCAN 9 | Howard County, TX | Oil & Gas Property | Apr 2026 |
| 5413 | DUNCAN D | Wharton County, TX | Oil & Gas Property | Mar 2026 |
| 5414 | DUNCAN D 1 | Weld County, CO | Oil & Gas Property | Oct 2020 |
| 5415 | DUNCAN D 20 | Weld County, CO | Oil & Gas Property | Apr 2018 |
| 5416 | DUNCAN FED | Uintah County, UT | Gas Property | May 2026 |
| 5417 | DUNCAN FEDERAL | Chaves County, NM | Oil Property | Jul 2019 |
| 5418 | DUNCAN FEDERAL | McKenzie County, ND | Oil & Gas Property | Dec 2020 |
| 5419 | DUNCAN FORK | Washington County, PA | Oil & Gas Property | Dec 2025 |
| 5420 | DUNCAN GARDNER | Love County, OK | Oil & Gas Property | Jul 2024 |
| 5421 | DUNCAN GAS UNIT | Robertson County, TX | Oil & Gas Property | May 2026 |
| 5422 | DUNCAN J.J. GAS UNIT | Robertson County, TX | Oil & Gas Property | May 2026 |
| 5423 | DUNCAN LH FEDERAL | Chaves County, NM | Oil & Gas Property | May 2026 |
| 5424 | DUNCAN SHORES | Coal County, OK | Oil & Gas Property | Apr 2026 |
| 5425 | DUNCAN STATE COM | Chaves County, NM | Oil & Gas Property | Jun 2026 |
| 5426 | DUNCAN UNIT | Tarrant County, TX | Oil & Gas Property | May 2026 |
| 5427 | DUNCAN UNIT | Karnes County, TX | Oil & Gas Property | May 2026 |
| 5428 | DUNCAN UNIT | Lea County, NM | Oil & Gas Property | Aug 1996 |
| 5429 | DUNCAN UNIT | Karnes County, TX | Oil & Gas Property | May 2026 |
| 5430 | DUNCAN VANSCHAICK | Moffat County, CO | Oil & Gas Property | Apr 2026 |
| 5431 | DUNCAN W.C | Jack County, TX | Oil & Gas Property | May 2026 |
| 5432 | DUNCAN, M E | Henderson County, KY | Oil Property | Dec 2020 |
| 5433 | DUNCAN, R | Henderson County, KY | Oil Property | Dec 2018 |
| 5434 | DUNCAN, S | Webster County, KY | Oil Property | Dec 2022 |
| 5435 | DUNCAN-BEAVERS ET AL UNIT | Coleman County, TX | Oil & Gas Property | Apr 2026 |
| 5436 | DUNCAN-WEMPLE | De Soto Parish, LA | Gas Property | Dec 2024 |
| 5437 | DUNDEE 4 FEDERAL COM | Eddy County, NM | Oil & Gas Property | May 2026 |
| 5438 | DUNDEE LAND & COAL | Tuscarawas County, OH | Oil & Gas Property | Dec 2022 |
| 5439 | DUNDER | McIntosh County, OK | Oil & Gas Property | Apr 2026 |
| 5440 | DUNDICS UNIT | Mahoning County, OH | Oil & Gas Property | Dec 2025 |
| 5441 | DUNDY STATE | Dundy County, NE | Oil Property | Dec 2025 |
| 5442 | DUNE | Beaver County, OK | Oil & Gas Property | Apr 2026 |
| 5443 | DUNE RIDGE | Logan County, CO | Oil & Gas Property | Feb 2015 |
| 5444 | DUNE UNIT | La Salle County, TX | Oil & Gas Property | May 2026 |
| 5445 | DUNES | Morris County, TX | Oil & Gas Property | May 2026 |
| 5446 | DUNES | Winkler County, TX | Oil & Gas Property | May 2026 |
| 5447 | DUNFEE | Athens County, OH | Oil & Gas Property | Dec 2017 |
| 5448 | DUNFEE | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 5449 | DUNFORD 14-10H | Dunn County, ND | Oil & Gas Property | Apr 2026 |
| 5450 | DUNGAN | Grady County, OK | Oil & Gas Property | Apr 2026 |
| 5451 | DUNGAN | Lee County, TX | Oil & Gas Property | May 2026 |
| 5452 | DUNGAN 32-5 5 | Archuleta County, CO | Gas Property | May 2026 |
| 5453 | DUNGAN-KEY TRUST | San Patricio County, TX | Oil & Gas Property | May 2026 |
| 5454 | DUNHAM | Montgomery County, KS | Gas Property | Feb 2026 |
| 5455 | DUNHAM | Wayne County, OH | Oil & Gas Property | Dec 2025 |
| 5456 | DUNHAM | Bradford County, PA | Gas Property | May 2026 |
| 5457 | DUNHAM | Young County, TX | Oil & Gas Property | May 2026 |
| 5458 | DUNHAM DAVID | Panola County, TX | Oil & Gas Property | May 2026 |
| 5459 | DUNHAM, MITCHELL ET AL DUNHAM | Taylor County, WV | Oil & Gas Property | Dec 2021 |
| 5460 | DUNHAM-LEM | Chautauqua County, KS | Oil Property | Apr 2026 |
| 5461 | DUNIGAN | Reeves County, TX | Oil & Gas Property | May 2026 |
| 5462 | DUNIGAN "12" | Midland County, TX | Oil & Gas Property | May 2026 |
| 5463 | DUNIGAN 445 | Yoakum County, TX | Oil Property | May 2026 |
| 5464 | DUNIGAN STATE UNIT | Reeves County, TX | Oil & Gas Property | May 2026 |
| 5465 | DUNKEL | Russell County, KS | Oil Property | Dec 2023 |
| 5466 | DUNKEL 7 STATE | Lea County, NM | Oil & Gas Property | May 2026 |
| 5467 | DUNKIN | Wagoner County, OK | Gas Property | May 2019 |
| 5468 | DUNKIN | Wagoner County, OK | Oil & Gas Property | May 2019 |
| 5469 | DUNKIN | Garvin County, OK | Oil Property | Apr 2026 |
| 5470 | DUNKIN UNIT | Howard County, TX | Oil & Gas Property | May 2026 |
| 5471 | DUNKIN UNIT | Lee County, TX | Oil & Gas Property | May 2026 |
| 5472 | DUNKIRK UNIT | Irion County, TX | Oil & Gas Property | May 2026 |
| 5473 | DUNKLE | Butler County, KS | Oil Property | Apr 2026 |
| 5474 | DUNKLE'A' | Morton County, KS | Oil & Gas Property | May 2025 |
| 5475 | DUNKLEMAN | Cattaraugus County, NY | Gas Property | Dec 2025 |
| 5476 | DUNKLIN STANLEY J | Rusk County, TX | Oil & Gas Property | May 2026 |
| 5477 | DUNKS | Harris County, TX | Oil & Gas Property | Dec 2024 |
| 5478 | DUNLAP | Seward County, KS | Oil & Gas Property | Apr 2009 |
| 5479 | DUNLAP | Wood County, WV | Oil & Gas Property | Dec 2021 |
| 5480 | DUNLAP | Licking County, OH | Oil & Gas Property | Dec 2025 |
| 5481 | DUNLAP | Tuscarawas County, OH | Oil & Gas Property | Dec 2025 |
| 5482 | DUNLAP | Crockett County, TX | Oil & Gas Property | May 2026 |
| 5483 | DUNLAP | Freestone County, TX | Oil & Gas Property | May 2026 |
| 5484 | DUNLAP | Pecos County, TX | Oil & Gas Property | May 2026 |
| 5485 | DUNLAP | Stephens County, OK | Oil Property | Mar 2026 |
| 5486 | DUNLAP | Carter County, OK | Oil Property | Apr 2026 |
| 5487 | DUNLAP | Guernsey County, OH | Oil & Gas Property | Dec 2025 |
| 5488 | DUNLAP | Los Angeles County, CA | Oil & Gas Property | Jun 2026 |
| 5489 | DUNLAP | Garvin County, OK | Oil & Gas Property | Apr 2026 |
| 5490 | DUNLAP | Morrill County, NE | Oil & Gas Property | Feb 2024 |
| 5491 | DUNLAP | Creek County, OK | Oil Property | Apr 2026 |
| 5492 | DUNLAP | Jack County, TX | Oil & Gas Property | May 2026 |
| 5493 | DUNLAP | Dimmit County, TX | Oil & Gas Property | May 2026 |
| 5494 | DUNLAP | Stevens County, KS | Oil & Gas Property | Apr 2026 |
| 5495 | DUNLAP | Campbell County, WY | Oil & Gas Property | Jun 2026 |
| 5496 | DUNLAP | Love County, OK | Oil Property | Nov 2006 |
| 5497 | DUNLAP | Indiana County, PA | Gas Property | Dec 2025 |
| 5498 | DUNLAP | Stevens County, KS | Gas Property | Apr 2026 |
| 5499 | DUNLAP | Rooks County, KS | Oil Property | Apr 2026 |
| 5500 | DUNLAP B.H | Jim Wells County, TX | Oil & Gas Property | May 2026 |