| 101 | MAYBERRY | Baca County, CO | Gas Property | Sep 2007 |
| 102 | MAYEDA | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 103 | MAYER | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 104 | MAYER | Weld County, CO | Oil & Gas Property | Oct 2021 |
| 105 | MAYFIELD | La Plata County, CO | Gas Property | Sep 2025 |
| 106 | MAYFIELD MELTON | La Plata County, CO | Gas Property | Sep 2025 |
| 107 | MAYNARD | Yuma County, CO | Gas Property | Sep 2025 |
| 108 | MB LARSON C 5 | Rio Blanco County, CO | Oil & Gas Property | Oct 2025 |
| 109 | MC 3-1HZ | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 110 | MC 3-2HZ | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 111 | MC 3-3HZ | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 112 | MC 3-4HZ | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 113 | MC 3-5HZ | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 114 | MC 3-6HZ | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 115 | MCCAFFREY STATE LD12-7 | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 116 | MCCALL | Yuma County, CO | Gas Property | Sep 2025 |
| 117 | MCCALLUM | Jackson County, CO | Oil & Gas Property | Sep 2025 |
| 118 | MCCALLUM | Jackson County, CO | Oil & Gas Property | Sep 2025 |
| 119 | MCCALLUM UNIT | Jackson County, CO | Oil & Gas Property | Sep 2025 |
| 120 | MCCARTHY | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 121 | MCCARTY | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 122 | MCCARTY | Boulder County, CO | Oil & Gas Property | Mar 2022 |
| 123 | MCCARVILLE | La Plata County, CO | Gas Property | Sep 2025 |
| 124 | MCCASLAND | Yuma County, CO | Gas Property | Sep 2025 |
| 125 | MCCASLIN | Yuma County, CO | Gas Property | Sep 2025 |
| 126 | MCCATHRON A | La Plata County, CO | Gas Property | Sep 2025 |
| 127 | MCCAW | La Plata County, CO | Gas Property | Sep 2025 |
| 128 | MCCLAY | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 129 | MCCLELLAN | Weld County, CO | Oil & Gas Property | Feb 2017 |
| 130 | MCCLOSKEY | Weld County, CO | Oil & Gas Property | Jun 2017 |
| 131 | MCCLUNG 29 | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 132 | MCCONAHAY | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 133 | MCCONLEY | Logan County, CO | Oil Property | May 2015 |
| 134 | MCCONNELL | Yuma County, CO | Gas Property | Sep 2025 |
| 135 | MCCONNELL | Yuma County, CO | Gas Property | Sep 2025 |
| 136 | MCCORMICK | Weld County, CO | Oil & Gas Property | Feb 2023 |
| 137 | MCCORMICK | Cheyenne County, CO | Oil & Gas Property | Oct 2025 |
| 138 | MCCOY | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 139 | MCCOY | Weld County, CO | Oil & Gas Property | Nov 2021 |
| 140 | MCCREATH | Washington County, CO | Gas Property | Oct 2025 |
| 141 | MCCULLOCH | La Plata County, CO | Gas Property | Sep 2025 |
| 142 | MCDANIEL | Mesa County, CO | Oil & Gas Property | Sep 2025 |
| 143 | MCDONALD | Weld County, CO | Oil & Gas Property | Jun 2024 |
| 144 | MCDONALD | Las Animas County, CO | Gas Property | Oct 2025 |
| 145 | MCDONALD | Yuma County, CO | Gas Property | Sep 2025 |
| 146 | MCDONALD | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 147 | MCDONALD | Boulder County, CO | Oil & Gas Property | Sep 2025 |
| 148 | MCELMO DOME | Montezuma County, CO | Oil & Gas Property | Oct 2025 |
| 149 | MCELMO DOME UNIT 3 | Montezuma County, CO | Oil & Gas Property | Oct 2025 |
| 150 | MCELMO DOME UNIT 31-38-18 HB | Montezuma County, CO | Oil & Gas Property | Oct 2025 |
| 151 | MCELVAIN | La Plata County, CO | Gas Property | Nov 2019 |
| 152 | MCELVAIN | La Plata County, CO | Gas Property | Sep 2025 |
| 153 | MCELWAIN | Adams County, CO | Oil & Gas Property | Jul 2021 |
| 154 | MCELWAIN 12 | Mesa County, CO | Oil & Gas Property | Sep 2025 |
| 155 | MCGIRR | Larimer County, CO | Oil & Gas Property | Sep 2025 |
| 156 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 157 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | May 2018 |
| 158 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | Oct 2024 |
| 159 | MCGUCKIN | Weld County, CO | Oil & Gas Property | Mar 2021 |
| 160 | MCINTOSH | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 161 | MCINTYRE | Moffat County, CO | Oil & Gas Property | Oct 2015 |
| 162 | MCINTYRE CANY | San Miguel County, CO | Oil & Gas Property | Nov 2023 |
| 163 | MCKAY FEDERAL AB02-15 | Weld County, CO | Oil Property | Sep 2025 |
| 164 | MCKEE | Weld County, CO | Oil & Gas Property | Oct 2017 |
| 165 | MCKEE UTE 01-26 1 | La Plata County, CO | Gas Property | Sep 2025 |
| 166 | MCKENNEY | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 167 | MCKENNEY 1 | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 168 | MCKINLEY | Weld County, CO | Oil & Gas Property | Aug 2017 |
| 169 | MCKINSTRY | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 170 | MCLAUGHLIN | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 171 | MCLAUGHLIN | Rio Blanco County, CO | Oil & Gas Property | Oct 2025 |
| 172 | MCLAUGHLIN | Rio Blanco County, CO | Oil & Gas Property | Oct 2025 |
| 173 | MCLAUGHLIN-CONSOLIDATED-G 8 | Rio Blanco County, CO | Oil & Gas Property | Oct 2025 |
| 174 | MCLEOD | Weld County, CO | Oil & Gas Property | Jul 2022 |
| 175 | MCLIN | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 176 | MCMANUS 33-22 | La Plata County, CO | Gas Property | Sep 2025 |
| 177 | MCMILLEN | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 178 | MCNARY | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 179 | MCNEAR | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 180 | MCPEEK | Weld County, CO | Oil & Gas Property | Sep 2024 |
| 181 | MCPHERSON A | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 182 | MCU 16-13 | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 183 | MCU 2 | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 184 | MCU FEE | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 185 | MCWILLIAMS | Moffat County, CO | Gas Property | Jun 2025 |
| 186 | MCWILLIAMS | Weld County, CO | Oil & Gas Property | May 2021 |
| 187 | MCWILLIAMS D | Weld County, CO | Oil & Gas Property | Oct 2018 |
| 188 | MEAD | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 189 | MEAD | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 190 | MEAD FEDERAL 30 | Garfield County, CO | Oil & Gas Property | Sep 2025 |
| 191 | MEAD PLACE | Weld County, CO | Oil & Gas Property | Aug 2021 |
| 192 | MEADER | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 193 | MEADOR | Mesa County, CO | Gas Property | Jun 2003 |
| 194 | MEAGHER | Rio Blanco County, CO | Oil & Gas Property | Sep 2025 |
| 195 | MECKLENBURG STATE LD01-7 | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 196 | MEEHL 01N-65W-24 | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 197 | MEESE | Weld County, CO | Oil & Gas Property | Sep 2025 |
| 198 | MEGAN H16 | Weld County, CO | Oil & Gas Property | Dec 2022 |
| 199 | MEGAN STATE H | Weld County, CO | Oil & Gas Property | Jul 2023 |
| 200 | MEGUIRE | Weld County, CO | Oil & Gas Property | Sep 2025 |