| 101 | OREO FEDERAL 5300 24-25T | Williams County, ND | Oil & Gas Property | May 2025 |
| 102 | ORION FEDERAL 5792 42-20H | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 103 | ORLYNNE 2-3H | Divide County, ND | Oil & Gas Property | May 2025 |
| 104 | ORMISTON | Burke County, ND | Oil & Gas Property | May 2025 |
| 105 | ORTMAN USA 34-31TFH | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 106 | ORVAL 44-23H | Dunn County, ND | Oil & Gas Property | May 2025 |
| 107 | ORVIE 24-20H | Williams County, ND | Oil & Gas Property | May 2025 |
| 108 | ORVILLE 29-32-162-98H 2XM | Divide County, ND | Oil & Gas Property | May 2025 |
| 109 | ORVILLE 4-9 | Williams County, ND | Oil & Gas Property | May 2025 |
| 110 | ORVIN 31-13TFH | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 111 | ORVIS 150-99-21-16 | McKenzie County, ND | Oil & Gas Property | May 2025 |
| 112 | ORVIS STATE 150-99-21-16 | McKenzie County, ND | Oil & Gas Property | May 2025 |
| 113 | OSAGE 5693 43-35T | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 114 | OSCAR | Divide County, ND | Oil & Gas Property | May 2025 |
| 115 | OSCAR 1-25H | Divide County, ND | Oil & Gas Property | May 2025 |
| 116 | OSCAR FOSSUM | Bottineau County, ND | Oil Property | May 2025 |
| 117 | OSCAR STOHLER 41-4H | Dunn County, ND | Oil & Gas Property | May 2025 |
| 118 | OSCAR THORSON USA 41-8TFH-2B | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 119 | OSEN 6192 43-21T | Burke County, ND | Oil & Gas Property | May 2025 |
| 120 | OSKING USA 14-12H | Dunn County, ND | Oil & Gas Property | May 2025 |
| 121 | OSMIUM 147-93-17B-20H | Dunn County, ND | Oil & Gas Property | May 2025 |
| 122 | OSMOND 1-3H | Williams County, ND | Oil & Gas Property | May 2025 |
| 123 | OSMUND 34-9TFH | Dunn County, ND | Oil & Gas Property | May 2025 |
| 124 | OSPREY 5401 | Williams County, ND | Oil & Gas Property | May 2025 |
| 125 | OSPREY FEDERAL | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 126 | OSTERBERG | Renville County, ND | Oil Property | Dec 2012 |
| 127 | OSTLUND 11-14 | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 128 | OTIS | McKenzie County, ND | Oil & Gas Property | May 2025 |
| 129 | OTIS | Divide County, ND | Oil & Gas Property | May 2025 |
| 130 | OTIS 11-28TFH | Dunn County, ND | Oil & Gas Property | May 2025 |
| 131 | OTT USA 44-7TFH | Dunn County, ND | Oil & Gas Property | May 2025 |
| 132 | OTTER 1-11H | Burke County, ND | Oil & Gas Property | May 2025 |
| 133 | OTTER 151-94-33D-28H | McKenzie County, ND | Oil & Gas Property | May 2025 |
| 134 | OTTER WOMAN 3 | Dunn County, ND | Oil & Gas Property | May 2025 |
| 135 | OTTO SEEL 4-1 | Williams County, ND | Oil & Gas Property | May 2025 |
| 136 | OUKROP | Dunn County, ND | Oil & Gas Property | May 2025 |
| 137 | OUTLAW GAP | McKenzie County, ND | Oil & Gas Property | May 2025 |
| 138 | OVERAL 5892 11-30T | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 139 | OVERDORF | Williams County, ND | Oil & Gas Property | May 2025 |
| 140 | OVERLAND 1 | Burke County, ND | Oil & Gas Property | May 2025 |
| 141 | OVERLAND 20-17-162-98H 4MD | Divide County, ND | Oil & Gas Property | May 2025 |
| 142 | OVERLEE | Burke County, ND | Oil & Gas Property | May 2025 |
| 143 | OWAN 14B-22HN | Divide County, ND | Oil & Gas Property | May 2025 |
| 144 | OWAN 23-26H | Williams County, ND | Oil & Gas Property | May 2025 |
| 145 | OWAN 29-32 1-H | Williams County, ND | Oil & Gas Property | May 2025 |
| 146 | OWAN-NEHRING 27-34 1-H | Williams County, ND | Oil & Gas Property | May 2025 |
| 147 | OWINGS | Burke County, ND | Oil & Gas Property | May 2015 |
| 148 | OWL 1-28HS | Divide County, ND | Oil & Gas Property | May 2025 |
| 149 | OWL COMES OUT 8-9H | McLean County, ND | Oil & Gas Property | May 2025 |
| 150 | OXY SWENSON 160-91-13-11-P-2H | Burke County, ND | Oil & Gas Property | May 2025 |
| 151 | OYLOE 5199 | McKenzie County, ND | Oil & Gas Property | May 2025 |
| 152 | OYLOE STATE | Williams County, ND | Oil & Gas Property | May 2025 |