| 130601 | UNCOMPAGHRE STATE UNIT | Reeves County, TX | Oil & Gas Property | Feb 2025 |
| 130602 | UNCOMPAHGRE | Grady County, OK | Oil & Gas Property | Feb 2025 |
| 130603 | UNCOMPAHGRE STATE 14-36-164-101 | Divide County, ND | Oil & Gas Property | Mar 2025 |
| 130604 | UNDAUNTED BSD STATE COM | Lea County, NM | Oil & Gas Property | Mar 2025 |
| 130605 | UNDER THE BRIDGE 452 | Yoakum County, TX | Oil & Gas Property | Feb 2025 |
| 130606 | UNDERDAHL | Pondera County, MT | Gas Property | May 2018 |
| 130607 | UNDERHILL | Marshall County, OK | Oil Property | Aug 2024 |
| 130608 | UNDERHILL | Weld County, CO | Oil & Gas Property | Mar 2025 |
| 130609 | UNDERHILL COAL | Clearfield County, PA | Gas Property | Dec 2023 |
| 130610 | UNDERWOOD | Red River County, TX | Oil & Gas Property | Feb 2025 |
| 130611 | UNDERWOOD | Kearny County, KS | Gas Property | Jan 2025 |
| 130612 | UNDERWOOD | Barton County, KS | Oil Property | Dec 2024 |
| 130613 | UNDERWOOD | McLean County, KY | Oil Property | Aug 2017 |
| 130614 | UNDERWOOD | Caddo Parish, LA | Oil Property | Jan 2025 |
| 130615 | UNDERWOOD | Perry County, OH | Oil & Gas Property | Dec 2024 |
| 130616 | UNDERWOOD | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 130617 | UNDERWOOD | Coshocton County, OH | Oil & Gas Property | Dec 2023 |
| 130618 | UNDERWOOD | Tyler County, WV | Oil & Gas Property | Dec 2021 |
| 130619 | UNDERWOOD | Doddridge County, WV | Oil & Gas Property | Oct 2021 |
| 130620 | UNDERWOOD | Doddridge County, WV | Oil & Gas Property | Dec 2021 |
| 130621 | UNDERWOOD | Campbell County, WY | Oil & Gas Property | Aug 2005 |
| 130622 | UNDERWOOD | Harrison County, TX | Oil & Gas Property | Feb 2025 |
| 130623 | UNDERWOOD | Winkler County, TX | Oil & Gas Property | Feb 2025 |
| 130624 | UNDERWOOD | Howard County, TX | Oil & Gas Property | Feb 2025 |
| 130625 | UNDERWOOD | Ward County, TX | Oil & Gas Property | Feb 2025 |
| 130626 | UNDERWOOD | Andrews County, TX | Oil & Gas Property | Feb 2025 |
| 130627 | UNDERWOOD | Faulkner County, AR | Gas Property | Jul 2024 |
| 130628 | UNDERWOOD | Chautauqua County, KS | Oil Property | Jan 2025 |
| 130629 | UNDERWOOD | Crawford County, KS | Oil Property | Aug 2020 |
| 130630 | UNDERWOOD | Greenwood County, KS | Oil Property | Jan 2025 |
| 130631 | UNDERWOOD | Milam County, TX | Oil & Gas Property | Feb 2025 |
| 130632 | UNDERWOOD | Beaver County, OK | Gas Property | Jan 2024 |
| 130633 | UNDERWOOD | Beaver County, OK | Oil & Gas Property | Oct 2018 |
| 130634 | UNDERWOOD | Haskell County, OK | Gas Property | Feb 2025 |
| 130635 | UNDERWOOD 33-7-15 | La Plata County, CO | Gas Property | Mar 2025 |
| 130636 | UNDERWOOD A | Seward County, KS | Oil & Gas Property | Jan 2025 |
| 130637 | UNDERWOOD ESTATE 1 | Lavaca County, TX | Oil & Gas Property | Jan 2025 |
| 130638 | UNDERWOOD MARY E | Montague County, TX | Oil & Gas Property | Feb 2025 |
| 130639 | UNDERWOOD, CHARLES G | Doddridge County, WV | Gas Property | Dec 2021 |
| 130640 | UNDERWOOD, RALPH | Tyler County, WV | Gas Property | Dec 2021 |
| 130641 | UNDERWOOD, RAYMOND | Tyler County, WV | Oil & Gas Property | Dec 2021 |
| 130642 | UNDERWOOD, RICHARD M | Wetzel County, WV | Oil & Gas Property | Dec 2021 |
| 130643 | UNDERWOOD-BREEN | Denton County, TX | Oil & Gas Property | Feb 2025 |
| 130644 | UNDERWOOD-JOHNSON 1 | Hutchinson County, TX | Oil & Gas Property | Jan 2025 |
| 130645 | UNDHJEM 1 | Burke County, ND | Oil & Gas Property | Mar 2025 |
| 130646 | UNDINE | Andrews County, TX | Oil & Gas Property | Feb 2025 |
| 130647 | UNEY 24-1 | Stanton County, KS | Oil & Gas Property | May 2005 |
| 130648 | UNFORGIVEN 34 113-114 | Ward County, TX | Oil & Gas Property | Feb 2025 |
| 130649 | UNGER | Armstrong County, PA | Gas Property | Dec 2024 |
| 130650 | UNGER | Yuma County, CO | Gas Property | Mar 2025 |
| 130651 | UNGER | Yuma County, CO | Gas Property | Mar 2025 |
| 130652 | UNGER | Decatur County, KS | Oil Property | Mar 1995 |
| 130653 | UNGER | Decatur County, KS | Oil Property | Aug 1988 |
| 130654 | UNGER | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 130655 | UNGER | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 130656 | UNGLES | Haskell County, KS | Gas Property | Jan 2025 |
| 130657 | UNGLES | Haskell County, KS | Oil & Gas Property | Jan 2025 |
| 130658 | UNGLES | Haskell County, KS | Oil & Gas Property | Jan 2025 |
| 130659 | UNGUREAN | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 130660 | UNI-UPR | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 130661 | UNICORN | Johnson County, TX | Gas Property | Feb 2025 |
| 130662 | UNICORN UNIT | Borden County, TX | Oil & Gas Property | Feb 2025 |
| 130663 | UNIMIN UNIT | Somervell County, TX | Oil & Gas Property | Feb 2025 |
| 130664 | UNION | Garfield County, CO | Oil & Gas Property | Mar 2025 |
| 130665 | UNION | Kern County, CA | Oil & Gas Property | Jun 2024 |
| 130666 | UNION | Orange County, CA | Oil & Gas Property | Mar 2025 |
| 130667 | UNION | Hodgeman County, KS | Oil Property | Oct 2024 |
| 130668 | UNION | Andrews County, TX | Oil & Gas Property | Feb 2025 |
| 130669 | UNION | Fremont County, WY | Oil & Gas Property | Oct 2017 |
| 130670 | UNION | Union Parish, LA | Gas Property | Dec 2024 |
| 130671 | UNION | Union Parish, LA | Gas Property | Dec 2000 |
| 130672 | UNION | Chaves County, NM | Oil Property | Feb 2007 |
| 130673 | UNION 33 FEDERAL | Chaves County, NM | Gas Property | Jul 2024 |
| 130674 | UNION 35 FEDERAL | Eddy County, NM | Oil & Gas Property | Mar 2025 |
| 130675 | UNION ANNEX | Santa Barbara County, CA | Oil & Gas Property | Mar 1986 |
| 130676 | UNION BANK | Kern County, CA | Oil & Gas Property | Feb 2025 |
| 130677 | UNION CAMP | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 130678 | UNION CARB | Noble County, OH | Oil & Gas Property | Dec 2024 |
| 130679 | UNION CARBIDE | Kanawha County, WV | Oil & Gas Property | Dec 2021 |
| 130680 | UNION CARBIDE CORP | Washington County, OH | Oil & Gas Property | Dec 1986 |
| 130681 | UNION CENT | Nueces County, TX | Oil & Gas Property | Feb 2025 |
| 130682 | UNION CENTRAL | Wilson County, KS | Oil & Gas Property | Sep 2024 |
| 130683 | UNION CENTRAL | Denton County, TX | Oil & Gas Property | Feb 2025 |
| 130684 | UNION CENTRAL LIFE INS | Nueces County, TX | Gas Property | Feb 2025 |
| 130685 | UNION CENTRAL-CONDEE WELCH (SA) 1H | Denton County, TX | Oil & Gas Property | Feb 2025 |
| 130686 | UNION CITY | Canadian County, OK | Oil & Gas Property | Feb 2025 |
| 130687 | UNION DARBONNE | Ouachita Parish, LA | Gas Property | Nov 2024 |
| 130688 | UNION GOVT | Grand County, UT | Oil & Gas Property | Apr 2025 |
| 130689 | UNION HILL | Washington County, TX | Oil & Gas Property | Feb 2025 |
| 130690 | UNION KING FEE | Kern County, CA | Oil & Gas Property | Sep 1986 |
| 130691 | UNION LAND CO | Harrison County, WV | Oil & Gas Property | Dec 2021 |
| 130692 | UNION PACIFIC | Albany County, WY | Oil Property | Apr 2025 |
| 130693 | UNION PACIFIC | Sweetwater County, WY | Oil & Gas Property | Apr 2009 |
| 130694 | UNION PACIFIC | Rio Blanco County, CO | Oil & Gas Property | Feb 2025 |
| 130695 | UNION PACIFIC | Crockett County, TX | Oil & Gas Property | Feb 2025 |
| 130696 | UNION PACIFIC 7 | Crockett County, TX | Oil & Gas Property | Feb 2025 |
| 130697 | UNION POWER C | Union Parish, LA | Gas Property | Dec 2024 |
| 130698 | UNION PROD | Union Parish, LA | Gas Property | Dec 2024 |
| 130699 | UNION PRODUCING | Ouachita Parish, LA | Gas Property | Nov 2024 |
| 130700 | UNION RAILROAD | Allegheny County, PA | Gas Property | Dec 2024 |