| 101 | MATSUSHIMA | Weld County, CO | Oil & Gas Property | Nov 2018 |
| 102 | MATSUSHIMA | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 103 | MAUDLIN GULCH | Moffat County, CO | Oil & Gas Property | Jun 2024 |
| 104 | MAUL | Adams County, CO | Oil & Gas Property | May 2018 |
| 105 | MAURICE | Yuma County, CO | Oil & Gas Property | Nov 2025 |
| 106 | MAVERICK | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 107 | MAVERICK 2W | Weld County, CO | Oil & Gas Property | Oct 2025 |
| 108 | MAVERICK STATE | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 109 | MAX B11-64-1HN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 110 | MAXEY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 111 | MAY JON | Weld County, CO | Oil & Gas Property | Apr 2016 |
| 112 | MAYBERRY | Baca County, CO | Gas Property | Sep 2007 |
| 113 | MAYEDA | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 114 | MAYER | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 115 | MAYER | Weld County, CO | Oil & Gas Property | Dec 2022 |
| 116 | MAYFIELD | La Plata County, CO | Gas Property | Nov 2025 |
| 117 | MAYFIELD MELTON | La Plata County, CO | Gas Property | Nov 2025 |
| 118 | MAYNARD | Yuma County, CO | Gas Property | Nov 2025 |
| 119 | MAZATLAN 23-25 | Las Animas County, CO | Gas Property | Dec 2025 |
| 120 | MB LARSON C 5 | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 121 | MC 3-1HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 122 | MC 3-2HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 123 | MC 3-3HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 124 | MC 3-4HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 125 | MC 3-5HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 126 | MC 3-6HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 127 | MCCAFFREY STATE LD12-7 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 128 | MCCALL | Yuma County, CO | Gas Property | Nov 2025 |
| 129 | MCCALLUM | Jackson County, CO | Oil & Gas Property | Nov 2025 |
| 130 | MCCALLUM | Jackson County, CO | Oil & Gas Property | Nov 2025 |
| 131 | MCCALLUM UNIT | Jackson County, CO | Oil & Gas Property | Nov 2025 |
| 132 | MCCARTHY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 133 | MCCARTY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 134 | MCCARTY | Boulder County, CO | Oil & Gas Property | Sep 2025 |
| 135 | MCCARVILLE | La Plata County, CO | Gas Property | Dec 2025 |
| 136 | MCCASLAND | Yuma County, CO | Gas Property | Nov 2025 |
| 137 | MCCASLIN | Yuma County, CO | Gas Property | Nov 2025 |
| 138 | MCCATHRON A | La Plata County, CO | Gas Property | Nov 2025 |
| 139 | MCCAW | La Plata County, CO | Gas Property | Nov 2025 |
| 140 | MCCLAY | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 141 | MCCLELLAN | Weld County, CO | Oil & Gas Property | Feb 2017 |
| 142 | MCCLOSKEY | Weld County, CO | Oil & Gas Property | Jun 2017 |
| 143 | MCCLUNG 29 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 144 | MCCONAHAY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 145 | MCCONLEY | Logan County, CO | Oil Property | May 2015 |
| 146 | MCCONNELL | Yuma County, CO | Gas Property | Nov 2025 |
| 147 | MCCONNELL | Yuma County, CO | Gas Property | Nov 2025 |
| 148 | MCCORMICK | Weld County, CO | Oil & Gas Property | Feb 2023 |
| 149 | MCCORMICK | Cheyenne County, CO | Oil & Gas Property | Nov 2025 |
| 150 | MCCOY | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 151 | MCCOY | Weld County, CO | Oil & Gas Property | Nov 2021 |
| 152 | MCCREATH | Washington County, CO | Gas Property | Dec 2025 |
| 153 | MCCULLOCH | La Plata County, CO | Gas Property | Dec 2025 |
| 154 | MCCULLOGH 1 | La Plata County, CO | Gas Property | Dec 2025 |
| 155 | MCCULLOUGH 34-32 | Las Animas County, CO | Gas Property | Dec 2025 |
| 156 | MCDANIEL | Mesa County, CO | Oil & Gas Property | Nov 2025 |
| 157 | MCDONALD | Weld County, CO | Oil & Gas Property | Jun 2024 |
| 158 | MCDONALD | Las Animas County, CO | Gas Property | Dec 2025 |
| 159 | MCDONALD | La Plata County, CO | Gas Property | Dec 2025 |
| 160 | MCDONALD | Yuma County, CO | Gas Property | Nov 2025 |
| 161 | MCDONALD | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 162 | MCDONALD | Boulder County, CO | Oil & Gas Property | Nov 2025 |
| 163 | MCELMO DOME | Montezuma County, CO | Oil & Gas Property | Dec 2025 |
| 164 | MCELMO DOME UNIT 3 | Montezuma County, CO | Oil & Gas Property | Dec 2025 |
| 165 | MCELMO DOME UNIT 31-38-18 HB | Montezuma County, CO | Oil & Gas Property | Dec 2025 |
| 166 | MCELVAIN | La Plata County, CO | Gas Property | Nov 2019 |
| 167 | MCELVAIN | La Plata County, CO | Gas Property | Nov 2025 |
| 168 | MCELWAIN | Adams County, CO | Oil & Gas Property | Jul 2021 |
| 169 | MCELWAIN 12 | Mesa County, CO | Oil & Gas Property | Nov 2025 |
| 170 | MCGIRR | Larimer County, CO | Oil & Gas Property | Dec 2025 |
| 171 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 172 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | May 2018 |
| 173 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | Oct 2024 |
| 174 | MCGUCKIN | Weld County, CO | Oil & Gas Property | Mar 2021 |
| 175 | MCINTOSH | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 176 | MCINTYRE | Moffat County, CO | Oil & Gas Property | Oct 2015 |
| 177 | MCINTYRE CANY | San Miguel County, CO | Oil & Gas Property | Nov 2023 |
| 178 | MCKAY FEDERAL AB02-15 | Weld County, CO | Oil Property | Dec 2025 |
| 179 | MCKEE | Weld County, CO | Oil & Gas Property | Oct 2017 |
| 180 | MCKEE UTE 01-26 1 | La Plata County, CO | Gas Property | Nov 2025 |
| 181 | MCKEEN | La Plata County, CO | Gas Property | Nov 2025 |
| 182 | MCKENNEY | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 183 | MCKENNEY 1 | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 184 | MCKINLEY | Weld County, CO | Oil & Gas Property | Aug 2017 |
| 185 | MCKINSTRY | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 186 | MCLAUGHLIN | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 187 | MCLAUGHLIN | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 188 | MCLAUGHLIN | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 189 | MCLAUGHLIN-CONSOLIDATED-G 8 | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 190 | MCLEOD | Weld County, CO | Oil & Gas Property | Jul 2022 |
| 191 | MCLIN | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 192 | MCMAHAN | La Plata County, CO | Gas Property | Nov 2025 |
| 193 | MCMANUS 33-22 | La Plata County, CO | Gas Property | Nov 2025 |
| 194 | MCMILLEN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 195 | MCNARY | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 196 | MCNEAR | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 197 | MCPEEK | Weld County, CO | Oil & Gas Property | Sep 2024 |
| 198 | MCPHERSON A | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 199 | MCU 16-13 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 200 | MCU 2 | Garfield County, CO | Oil & Gas Property | Dec 2025 |