| 701 | OKARCHE | Canadian County, OK | Oil & Gas Property | May 2025 |
| 702 | OKARCHE | Canadian County, OK | Oil & Gas Property | May 2025 |
| 703 | OKC 1 | Oklahoma County, OK | Oil & Gas Property | Jan 2018 |
| 704 | OKC 2 | Oklahoma County, OK | Oil & Gas Property | Jan 2018 |
| 705 | OKC 3 | Oklahoma County, OK | Oil & Gas Property | Mar 2016 |
| 706 | OKC 4 | Oklahoma County, OK | Oil & Gas Property | Mar 2016 |
| 707 | OKEEF | Mahoning County, OH | Oil & Gas Property | Dec 2024 |
| 708 | OKEEFE | Stanton County, KS | Gas Property | Apr 2025 |
| 709 | OKEEFE | Archer County, TX | Oil & Gas Property | Mar 2020 |
| 710 | OKEEFE | Caddo Parish, LA | Oil & Gas Property | Dec 2024 |
| 711 | OKELL | Adams County, MS | Oil & Gas Property | May 2025 |
| 712 | OKELLY | Adams County, MS | Oil Property | Feb 1986 |
| 713 | OKELLY, OTHELL | Jones County, TX | Oil & Gas Property | May 2025 |
| 714 | OKESON | Wallace County, KS | Oil & Gas Property | Feb 2025 |
| 715 | OKFUSKA | Seminole County, OK | Oil Property | May 2025 |
| 716 | OKIE | Major County, OK | Oil & Gas Property | Sep 2023 |
| 717 | OKINAWA 24-11 UNIT | Reeves County, TX | Oil & Gas Property | May 2025 |
| 718 | OKLAHOMA | Cimarron County, OK | Oil & Gas Property | Apr 2025 |
| 719 | OKLAHOMA | Grant County, OK | Oil & Gas Property | Jun 2025 |
| 720 | OKLAHOMA | Beaver County, OK | Oil & Gas Property | May 2025 |
| 721 | OKLAHOMA | Major County, OK | Oil & Gas Property | Jun 2025 |
| 722 | OKLAHOMA | Texas County, OK | Gas Property | May 2025 |
| 723 | OKLAHOMA 32 FEE | Eddy County, NM | Oil & Gas Property | May 2025 |
| 724 | OKLAHOMA STATE | Texas County, OK | Oil & Gas Property | May 2025 |
| 725 | OKMULGEE MANNING | Okmulgee County, OK | Oil Property | Mar 2017 |
| 726 | OKORONKWO | Canadian County, OK | Oil & Gas Property | May 2025 |
| 727 | OKTOBERFEST | San Juan County, NM | Oil & Gas Property | Mar 2025 |
| 728 | OLA MCCANN | San Patricio County, TX | Oil & Gas Property | Apr 2025 |
| 729 | OLAF 42X-11 | Williams County, ND | Oil & Gas Property | Jun 2025 |
| 730 | OLAF TUFTE B | Bottineau County, ND | Oil Property | Dec 1997 |
| 731 | OLAJUWON | Freestone County, TX | Oil & Gas Property | May 2025 |
| 732 | OLAN | Le Flore County, OK | Gas Property | May 2025 |
| 733 | OLANDER | Rice County, KS | Oil & Gas Property | Apr 2025 |
| 734 | OLANDER | Weld County, CO | Oil & Gas Property | Jun 2025 |
| 735 | OLANDER | Weld County, CO | Oil & Gas Property | May 2018 |
| 736 | OLANDER CARL | Jones County, TX | Oil & Gas Property | Mar 2025 |
| 737 | OLAUGHLIN | Hansford County, TX | Oil & Gas Property | Nov 2024 |
| 738 | OLAUGHLIN | Palo Pinto County, TX | Oil & Gas Property | May 2025 |
| 739 | OLAUGHLIN 1 | Kearny County, KS | Gas Property | Apr 2025 |
| 740 | OLBERDING | Nemaha County, KS | Oil Property | Apr 2025 |
| 741 | OLCESE | Kern County, CA | Oil & Gas Property | May 2025 |
| 742 | OLCESE ESTATE | Kern County, CA | Oil Property | May 2025 |
| 743 | OLCOTT | Tarrant County, TX | Oil & Gas Property | May 2025 |
| 744 | OLCOTT D | Ward County, TX | Oil & Gas Property | Dec 2023 |
| 745 | OLCOTT H. W | Gray County, TX | Gas Property | May 2025 |
| 746 | OLCOTT NORTH A UNIT | Tarrant County, TX | Oil & Gas Property | May 2025 |
| 747 | OLCZAK | Greene County, PA | Gas Property | Jun 2025 |
| 748 | OLD ARCHES 14-35MBH ULW | McKenzie County, ND | Oil & Gas Property | Jun 2025 |
| 749 | OLD BEAR USA 11-17H | Mountrail County, ND | Oil & Gas Property | Jun 2025 |
| 750 | OLD BEAR WOMAN BIA | Blaine County, OK | Oil & Gas Property | May 2025 |
| 751 | OLD BLUE 25 | Upton County, TX | Oil & Gas Property | May 2025 |
| 752 | OLD BORDER | Toole County, MT | Oil Property | May 2025 |
| 753 | OLD BRASS & NEEDLE | Montague County, TX | Oil & Gas Property | Dec 2021 |
| 754 | OLD CRAB 1506 | Kingfisher County, OK | Oil & Gas Property | May 2025 |
| 755 | OLD FAITHFUL | Woods County, OK | Oil & Gas Property | Nov 2015 |
| 756 | OLD GLORY 5-8-10 | Caddo County, OK | Oil & Gas Property | May 2025 |
| 757 | OLD GLORY HOLE | Natrona County, WY | Oil Property | Oct 2018 |
| 758 | OLD HICKORY | McKenzie County, ND | Oil & Gas Property | Jun 2025 |
| 759 | OLD HICKORY PLTN | Iberville Parish, LA | Oil & Gas Property | Dec 2024 |
| 760 | OLD HICKORY STATE | Reeves County, TX | Oil & Gas Property | Apr 2025 |
| 761 | OLD HOME MANOR | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 762 | OLD HUGH 18-09-11 | Kingfisher County, OK | Oil & Gas Property | May 2025 |
| 763 | OLD INDIAN DRAW UNIT | Eddy County, NM | Oil & Gas Property | May 2025 |
| 764 | OLD IRONSIDE 0405 | Pecos County, TX | Oil & Gas Property | May 2025 |
| 765 | OLD LOCO UNIT | Eddy County, NM | Oil & Gas Property | May 2025 |
| 766 | OLD MCDONALD FARM UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 767 | OLD MONARCH STATE 12 | Reeves County, TX | Oil & Gas Property | May 2025 |
| 768 | OLD OAK FARM 6-10-3 | Jefferson County, OH | Gas Property | Mar 2025 |
| 769 | OLD OCEAN UNIT | Brazoria County, TX | Oil & Gas Property | May 2025 |
| 770 | OLD OCEAN UNIT | Brazoria County, TX | Oil & Gas Property | Nov 1993 |
| 771 | OLD PARTNER | Loving County, TX | Oil & Gas Property | May 2025 |
| 772 | OLD PARTNER 54-1-30 | Loving County, TX | Oil & Gas Property | May 2025 |
| 773 | OLD RANCH CANYON 7 FEDERAL | Eddy County, NM | Oil & Gas Property | May 2019 |
| 774 | OLD RANCH KNOLL 8 FEDERAL | Eddy County, NM | Oil & Gas Property | Feb 2015 |
| 775 | OLD RICKYS RIDGE 31_30-14N-7W | Canadian County, OK | Oil & Gas Property | May 2025 |
| 776 | OLD RIVER RANCH DIM | Dimmit County, TX | Oil & Gas Property | May 2025 |
| 777 | OLD ROCK COM | Rio Arriba County, NM | Oil & Gas Property | Jun 2025 |
| 778 | OLD ROSEBUD 1524-36 | Chaves County, NM | Oil & Gas Property | May 2025 |
| 779 | OLD ROSEBUD 37 UNIT | Culberson County, TX | Oil & Gas Property | May 2025 |
| 780 | OLD STONE BANK | Summit County, OH | Oil & Gas Property | Dec 2009 |
| 781 | OLD SWITCHEROO 418 | Yoakum County, TX | Oil & Gas Property | May 2025 |
| 782 | OLD TOWN | Johnson County, TX | Gas Property | May 2025 |
| 783 | OLD TOWN BEAGLE CLUB | Clearfield County, PA | Gas Property | Dec 2024 |
| 784 | OLD TOWN FARMS | Mason County, WV | Oil & Gas Property | Dec 2021 |
| 785 | OLD TRADING POST | San Juan County, NM | Oil & Gas Property | Jun 2025 |
| 786 | OLD WEATHERFORD | Tarrant County, TX | Oil & Gas Property | May 2025 |
| 787 | OLD WHIRLWIND | Roger Mills County, OK | Oil & Gas Property | May 2025 |
| 788 | OLD WOMAN | Blaine County, OK | Oil & Gas Property | Oct 2024 |
| 789 | OLD YUCCA | Reeves County, TX | Oil & Gas Property | Oct 2024 |
| 790 | OLD ZAPATA DEEP G | Zapata County, TX | Oil & Gas Property | May 2025 |
| 791 | OLDAKER | Sherman County, TX | Gas Property | May 2025 |
| 792 | OLDEN-PAULL UNIT 1 | Brazos County, TX | Oil & Gas Property | May 2025 |
| 793 | OLDENBURG | Fayette County, TX | Oil & Gas Property | May 2025 |
| 794 | OLDFIELD | Beckham County, OK | Oil & Gas Property | May 2025 |
| 795 | OLDFIELD 1-1H | Caddo County, OK | Oil & Gas Property | May 2025 |
| 796 | OLDHAM | Ellis County, KS | Oil Property | Mar 2025 |
| 797 | OLDHAM | Midland County, TX | Oil & Gas Property | May 2025 |
| 798 | OLDHAM | Pawnee County, OK | Oil & Gas Property | Jun 2025 |
| 799 | OLDHAM | Archer County, TX | Oil & Gas Property | May 2025 |
| 800 | OLDHAM | Petroleum County, MT | Oil Property | Jan 2015 |