| 701 | OJO H | San Juan County, NM | Gas Property | Mar 2025 |
| 702 | OK CORRAL | Tarrant County, TX | Gas Property | Mar 2025 |
| 703 | OK LOGGING & TIMBER | Jackson County, WV | Gas Property | Dec 2021 |
| 704 | OK STATE | Pottawatomie County, OK | Oil Property | Feb 2025 |
| 705 | OK STATE 18-17-6 | Kingfisher County, OK | Oil & Gas Property | Feb 2025 |
| 706 | OKAGAWA | Garfield County, CO | Oil & Gas Property | Mar 2025 |
| 707 | OKAGAWA FEDERAL | Garfield County, CO | Oil & Gas Property | Mar 2025 |
| 708 | OKAPI | Brazos County, TX | Oil & Gas Property | Feb 2025 |
| 709 | OKAPI STATE UNIT | Reeves County, TX | Oil & Gas Property | Feb 2025 |
| 710 | OKARCHE | Canadian County, OK | Oil & Gas Property | Feb 2025 |
| 711 | OKARCHE | Canadian County, OK | Oil & Gas Property | Feb 2025 |
| 712 | OKC 1 | Oklahoma County, OK | Oil & Gas Property | Jan 2018 |
| 713 | OKC 2 | Oklahoma County, OK | Oil & Gas Property | Jan 2018 |
| 714 | OKC 3 | Oklahoma County, OK | Oil & Gas Property | Mar 2016 |
| 715 | OKC 4 | Oklahoma County, OK | Oil & Gas Property | Mar 2016 |
| 716 | OKEEF | Mahoning County, OH | Oil & Gas Property | Dec 2024 |
| 717 | OKEEFE | Stanton County, KS | Gas Property | Feb 2025 |
| 718 | OKEEFE | Archer County, TX | Oil & Gas Property | Mar 2020 |
| 719 | OKEEFE | Caddo Parish, LA | Oil & Gas Property | Dec 2024 |
| 720 | OKELL | Adams County, MS | Oil & Gas Property | Feb 2025 |
| 721 | OKELLY | Adams County, MS | Oil Property | Feb 1986 |
| 722 | OKELLY, OTHELL | Jones County, TX | Oil & Gas Property | Mar 2025 |
| 723 | OKESON | Wallace County, KS | Oil & Gas Property | Feb 2025 |
| 724 | OKFUSKA | Seminole County, OK | Oil Property | Nov 2024 |
| 725 | OKIE | Major County, OK | Oil & Gas Property | Sep 2023 |
| 726 | OKINAWA 24-11 UNIT | Reeves County, TX | Oil & Gas Property | Mar 2025 |
| 727 | OKLAHOMA | Cimarron County, OK | Oil & Gas Property | Feb 2025 |
| 728 | OKLAHOMA | Grant County, OK | Oil & Gas Property | Mar 2025 |
| 729 | OKLAHOMA | Beaver County, OK | Oil & Gas Property | Feb 2025 |
| 730 | OKLAHOMA | Major County, OK | Oil & Gas Property | Mar 2025 |
| 731 | OKLAHOMA | Texas County, OK | Gas Property | Feb 2025 |
| 732 | OKLAHOMA 32 FEE | Eddy County, NM | Oil & Gas Property | Mar 2025 |
| 733 | OKLAHOMA 33-28-13 | Woods County, OK | Oil & Gas Property | Feb 2025 |
| 734 | OKLAHOMA GOLD 1-20 | Carter County, OK | Oil & Gas Property | Mar 2025 |
| 735 | OKLAHOMA STATE | Texas County, OK | Oil & Gas Property | Feb 2025 |
| 736 | OKMULGEE MANNING | Okmulgee County, OK | Oil Property | Mar 2017 |
| 737 | OKORONKWO | Canadian County, OK | Oil & Gas Property | Feb 2025 |
| 738 | OKTOBERFEST | San Juan County, NM | Oil & Gas Property | Mar 2025 |
| 739 | OLA MCCANN | San Patricio County, TX | Oil & Gas Property | Oct 2018 |
| 740 | OLAF 42X-11 | Williams County, ND | Oil & Gas Property | Apr 2025 |
| 741 | OLAF TUFTE B | Bottineau County, ND | Oil Property | Dec 1997 |
| 742 | OLAI | Johnson County, TX | Gas Property | Jun 2017 |
| 743 | OLAJUWON | Freestone County, TX | Oil & Gas Property | Feb 2025 |
| 744 | OLAN | Le Flore County, OK | Gas Property | Feb 2025 |
| 745 | OLANDER | Rice County, KS | Oil & Gas Property | Feb 2025 |
| 746 | OLANDER | Weld County, CO | Oil & Gas Property | Mar 2025 |
| 747 | OLANDER | Weld County, CO | Oil & Gas Property | May 2018 |
| 748 | OLANDER CARL | Jones County, TX | Oil & Gas Property | Mar 2025 |
| 749 | OLAUGHLIN | Hansford County, TX | Oil & Gas Property | Nov 2024 |
| 750 | OLAUGHLIN | Palo Pinto County, TX | Oil & Gas Property | Mar 2025 |
| 751 | OLAUGHLIN 1 | Kearny County, KS | Gas Property | Feb 2025 |
| 752 | OLBERDING | Nemaha County, KS | Oil Property | Feb 2025 |
| 753 | OLCESE | Kern County, CA | Oil & Gas Property | Mar 2025 |
| 754 | OLCESE ESTATE | Kern County, CA | Oil Property | Mar 2025 |
| 755 | OLCOTT | Tarrant County, TX | Oil & Gas Property | Feb 2025 |
| 756 | OLCOTT D | Ward County, TX | Oil & Gas Property | Dec 2023 |
| 757 | OLCOTT H. W | Gray County, TX | Gas Property | Mar 2025 |
| 758 | OLCOTT NORTH A UNIT | Tarrant County, TX | Oil & Gas Property | Mar 2025 |
| 759 | OLCZAK | Greene County, PA | Gas Property | Mar 2025 |
| 760 | OLD ARCHES 14-35MBH ULW | McKenzie County, ND | Oil & Gas Property | Apr 2025 |
| 761 | OLD BEAR USA 11-17H | Mountrail County, ND | Oil & Gas Property | Apr 2025 |
| 762 | OLD BEAR WOMAN BIA | Blaine County, OK | Oil & Gas Property | Feb 2025 |
| 763 | OLD BLUE 25 | Upton County, TX | Oil & Gas Property | Mar 2025 |
| 764 | OLD BORDER | Toole County, MT | Oil Property | Mar 2025 |
| 765 | OLD BRASS & NEEDLE | Montague County, TX | Oil & Gas Property | Dec 2021 |
| 766 | OLD BROWN 3-28-16 | Woods County, OK | Oil & Gas Property | Feb 2025 |
| 767 | OLD CRAB 1506 | Kingfisher County, OK | Oil & Gas Property | Feb 2025 |
| 768 | OLD FAITHFUL | Woods County, OK | Oil & Gas Property | Nov 2015 |
| 769 | OLD GLORY 5-8-10 | Caddo County, OK | Oil & Gas Property | Feb 2025 |
| 770 | OLD GLORY HOLE | Natrona County, WY | Oil Property | Oct 2018 |
| 771 | OLD HICKORY | McKenzie County, ND | Oil & Gas Property | Apr 2025 |
| 772 | OLD HICKORY PLTN | Iberville Parish, LA | Oil & Gas Property | Dec 2024 |
| 773 | OLD HICKORY STATE | Reeves County, TX | Oil & Gas Property | Mar 2025 |
| 774 | OLD HOME MANOR | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 775 | OLD INDIAN DRAW UNIT | Eddy County, NM | Oil & Gas Property | Mar 2025 |
| 776 | OLD IRONSIDE 0405 | Pecos County, TX | Oil & Gas Property | Mar 2025 |
| 777 | OLD LOCO UNIT | Eddy County, NM | Oil & Gas Property | Mar 2025 |
| 778 | OLD MCDONALD FARM UNIT | Washington County, PA | Gas Property | Mar 2025 |
| 779 | OLD MONARCH STATE 12 | Reeves County, TX | Oil & Gas Property | Mar 2025 |
| 780 | OLD OAK FARM 6-10-3 | Jefferson County, OH | Gas Property | Mar 2025 |
| 781 | OLD OCEAN UNIT | Brazoria County, TX | Oil & Gas Property | Mar 2025 |
| 782 | OLD PARTNER | Loving County, TX | Oil & Gas Property | Mar 2025 |
| 783 | OLD PARTNER 54-1-30 | Loving County, TX | Oil & Gas Property | Mar 2025 |
| 784 | OLD RANCH CANYON 7 FEDERAL | Eddy County, NM | Oil & Gas Property | May 2019 |
| 785 | OLD RANCH KNOLL 8 FEDERAL | Eddy County, NM | Oil & Gas Property | Feb 2015 |
| 786 | OLD RICKYS RIDGE 31_30-14N-7W | Canadian County, OK | Oil & Gas Property | Feb 2025 |
| 787 | OLD RIVER RANCH DIM | Dimmit County, TX | Oil & Gas Property | Mar 2025 |
| 788 | OLD ROCK COM | Rio Arriba County, NM | Oil & Gas Property | Mar 2025 |
| 789 | OLD ROSEBUD 1524-36 | Chaves County, NM | Oil & Gas Property | Mar 2025 |
| 790 | OLD ROSEBUD 37 UNIT | Culberson County, TX | Oil & Gas Property | Mar 2025 |
| 791 | OLD STONE BANK | Summit County, OH | Oil & Gas Property | Dec 2009 |
| 792 | OLD SWITCHEROO 418 | Yoakum County, TX | Oil & Gas Property | Mar 2025 |
| 793 | OLD TOWN | Johnson County, TX | Gas Property | Mar 2025 |
| 794 | OLD TOWN BEAGLE CLUB | Clearfield County, PA | Gas Property | Dec 2024 |
| 795 | OLD TOWN FARMS | Mason County, WV | Oil & Gas Property | Dec 2021 |
| 796 | OLD TRADING POST | San Juan County, NM | Oil & Gas Property | Apr 2025 |
| 797 | OLD WEATHERFORD | Tarrant County, TX | Oil & Gas Property | Mar 2025 |
| 798 | OLD WOMAN | Blaine County, OK | Oil & Gas Property | Oct 2024 |
| 799 | OLD YUCCA | Reeves County, TX | Oil & Gas Property | Oct 2024 |
| 800 | OLD ZAPATA DEEP G | Zapata County, TX | Oil & Gas Property | Mar 2025 |