| 101 | OAK RIDGE N | Susquehanna County, PA | Gas Property | May 2026 |
| 102 | OAK STATE UNIT | Reeves County, TX | Gas Property | May 2026 |
| 103 | OAK TREE | Kingfisher County, OK | Oil & Gas Property | Apr 2026 |
| 104 | OAK TREE FAIRWAY UNIT | Mercer County, PA | Oil & Gas Property | Dec 2025 |
| 105 | OAK VALLEY | Johnson County, TX | Gas Property | May 2026 |
| 106 | OAK VALLEY 2 | Dawson County, TX | Oil & Gas Property | May 2026 |
| 107 | OAKASON NV FEDERAL | Eddy County, NM | Oil & Gas Property | Jun 2022 |
| 108 | OAKDALE | Dunn County, ND | Oil & Gas Property | May 2026 |
| 109 | OAKES | Dewey County, OK | Oil & Gas Property | May 2026 |
| 110 | OAKES | Dewey County, OK | Oil & Gas Property | Apr 2026 |
| 111 | OAKES | Woodson County, KS | Oil Property | May 2012 |
| 112 | OAKES | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 113 | OAKES | McKean County, PA | Oil Property | Dec 2007 |
| 114 | OAKES | Barber County, KS | Oil & Gas Property | Mar 2026 |
| 115 | OAKES | Woodson County, KS | Oil Property | Feb 2026 |
| 116 | OAKES | Love County, OK | Oil & Gas Property | Apr 2026 |
| 117 | OAKES 25 | Texas County, OK | Oil & Gas Property | Apr 2026 |
| 118 | OAKES C.W. ESTATE | Limestone County, TX | Oil & Gas Property | May 2026 |
| 119 | OAKES G B | Chautauqua County, KS | Oil Property | Mar 2026 |
| 120 | OAKES PAT GAS UNIT | Limestone County, TX | Oil & Gas Property | May 2026 |
| 121 | OAKES T.C. ESTATE GAS UNIT | Freestone County, TX | Oil & Gas Property | May 2026 |
| 122 | OAKES, OLLIE | Metcalfe County, KY | Oil Property | Nov 2004 |
| 123 | OAKES-TURNER GAS UNIT NO. 1 | Freestone County, TX | Oil & Gas Property | May 2026 |
| 124 | OAKHURST F | Montgomery County, KS | Gas Property | Aug 2024 |
| 125 | OAKLAND | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 126 | OAKLAND | Lincoln County, OK | Oil & Gas Property | May 2026 |
| 127 | OAKLAND | Mountrail County, ND | Oil & Gas Property | May 2026 |
| 128 | OAKLAND | Adams County, MS | Oil Property | Jan 1997 |
| 129 | OAKLAND | Kern County, CA | Oil & Gas Property | May 2026 |
| 130 | OAKLAND 151-103-29B-32-1H | McKenzie County, ND | Oil & Gas Property | May 2026 |
| 131 | OAKLAND CEMET | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 132 | OAKLAND CORP | Cass County, TX | Oil & Gas Property | Nov 2022 |
| 133 | OAKLAND CORP WATERFLOOD UNIT | Cass County, TX | Oil & Gas Property | Apr 2026 |
| 134 | OAKLAND FEDERAL 1 | McKenzie County, ND | Oil & Gas Property | May 2026 |
| 135 | OAKLEAF, LINN | Labette County, KS | Gas Property | Mar 2026 |
| 136 | OAKLEY | Hopkins County, KY | Oil Property | Feb 2022 |
| 137 | OAKLEY | Dewey County, OK | Oil & Gas Property | Apr 2026 |
| 138 | OAKLEY FED | Converse County, WY | Oil & Gas Property | May 2026 |
| 139 | OAKLIEF-SHARROCK | Coshocton County, OH | Oil & Gas Property | Dec 2025 |
| 140 | OAKMAN | Love County, OK | Oil & Gas Property | May 2026 |
| 141 | OAKMONT | Dawson County, TX | Oil & Gas Property | May 2026 |
| 142 | OAKMONT 11 10 STATE COM | Lea County, NM | Oil & Gas Property | May 2026 |
| 143 | OAKMONT 1505 | Kingfisher County, OK | Oil & Gas Property | Apr 2026 |
| 144 | OAKMONT COUNT | Allegheny County, PA | Gas Property | Dec 2025 |
| 145 | OAKMONT EAST | Allegheny County, PA | Gas Property | Dec 2025 |
| 146 | OAKRIDGE | Ventura County, CA | Oil & Gas Property | Jun 2026 |
| 147 | OAKRIDGE | Chautauqua County, KS | Oil & Gas Property | Jun 2015 |
| 148 | OAKS | Johnson County, TX | Oil & Gas Property | May 2026 |
| 149 | OAKS | Custer County, OK | Oil & Gas Property | Apr 2026 |
| 150 | OAKS | Caddo County, OK | Oil Property | Oct 2025 |
| 151 | OAKS | Martin County, TX | Oil & Gas Property | May 2026 |
| 152 | OAKS STATE | Andrews County, TX | Oil & Gas Property | May 2026 |
| 153 | OAKSON A FEDERAL | Chaves County, NM | Oil Property | Oct 2001 |
| 154 | OAKSON B FEDERAL | Chaves County, NM | Oil & Gas Property | Nov 2009 |
| 155 | OAKWOOD | Los Angeles County, CA | Oil & Gas Property | Mar 2001 |
| 156 | OAKWOOD | Tarrant County, TX | Gas Property | May 2026 |
| 157 | OAKWOOD CLUB | Cuyahoga County, OH | Oil & Gas Property | Dec 2015 |
| 158 | OAKWOOD REALTY | Jefferson County, TX | Oil & Gas Property | Mar 2026 |
| 159 | OARE A | Alfalfa County, OK | Oil & Gas Property | Feb 2014 |
| 160 | OASIS | Comanche County, KS | Oil & Gas Property | Mar 2026 |
| 161 | OASIS 9-16-33-40 | Mitchell County, TX | Oil & Gas Property | May 2026 |
| 162 | OASIS MEIERS 5692 | Mountrail County, ND | Oil & Gas Property | May 2026 |
| 163 | OASIS UNIT | Karnes County, TX | Oil & Gas Property | May 2026 |
| 164 | OAT MOUNTAIN | Los Angeles County, CA | Oil & Gas Property | Jun 2026 |
| 165 | OATES | Limestone County, TX | Oil & Gas Property | May 2026 |
| 166 | OATES | Hutchinson County, TX | Oil & Gas Property | Apr 2026 |
| 167 | OATES | Wise County, TX | Oil & Gas Property | May 2026 |
| 168 | OATES 21-27H | Mountrail County, ND | Oil & Gas Property | May 2026 |
| 169 | OATES G | Wise County, TX | Oil & Gas Property | May 2026 |
| 170 | OATES J. S | Pecos County, TX | Oil & Gas Property | Mar 2026 |
| 171 | OATES UNIT | Polk County, TX | Oil & Gas Property | May 2026 |
| 172 | OATHOUT | Sumner County, KS | Oil Property | Jan 2026 |
| 173 | OATMAN | Reeves County, TX | Oil & Gas Property | May 2026 |
| 174 | OATMAN | Reeves County, TX | Oil & Gas Property | May 2026 |
| 175 | OATMAN STATE UNIT 11-14 | Reeves County, TX | Oil & Gas Property | May 2026 |
| 176 | OATMEAL 8 FEDERAL | Eddy County, NM | Oil & Gas Property | May 2026 |
| 177 | OATS UT 2-26 3-3-23-14-1 | Duchesne County, UT | Oil & Gas Property | May 2026 |
| 178 | OB H1 | Shelby County, TX | Gas Property | May 2026 |
| 179 | OBACH | Stark County, ND | Oil & Gas Property | Nov 2016 |
| 180 | OBANION | Harrison County, TX | Oil & Gas Property | Sep 2021 |
| 181 | OBANION | Marshall County, OK | Oil & Gas Property | Apr 2026 |
| 182 | OBANION | Fresno County, CA | Gas Property | Aug 1997 |
| 183 | OBANION | Harrison County, TX | Oil & Gas Property | May 2026 |
| 184 | OBANION | Harrison County, TX | Oil & Gas Property | Jul 2014 |
| 185 | OBANION A | Harrison County, TX | Oil & Gas Property | Jan 2021 |
| 186 | OBANION J. T. DR | Caldwell County, TX | Oil & Gas Property | May 2026 |
| 187 | OBANNON | Licking County, OH | Oil & Gas Property | Dec 2025 |
| 188 | OBARR | Union County, AR | Oil Property | May 1966 |
| 189 | OBELE-KATIE | Garvin County, OK | Oil & Gas Property | Nov 2025 |
| 190 | OBELE-STEWART | Grant County, OK | Oil & Gas Property | Jul 2019 |
| 191 | OBENHAUS | Colorado County, TX | Oil & Gas Property | May 2026 |
| 192 | OBENHAUS | Wichita County, TX | Oil & Gas Property | May 2026 |
| 193 | OBENHAUS | Wharton County, TX | Oil & Gas Property | May 2026 |
| 194 | OBENOUR 150-99-2 | McKenzie County, ND | Oil & Gas Property | May 2026 |
| 195 | OBENOUR 150-99-33-28-8H | McKenzie County, ND | Oil & Gas Property | May 2026 |
| 196 | OBER 20-5 | Bottineau County, ND | Oil Property | May 2026 |
| 197 | OBER UNIT | Bradford County, PA | Gas Property | May 2026 |
| 198 | OBER UNIT | Westmoreland County, PA | Gas Property | Dec 2025 |
| 199 | OBERGFELL | Richland County, MT | Oil & Gas Property | May 2026 |
| 200 | OBERHANSLY | Uintah County, UT | Oil & Gas Property | May 2026 |