| 3301 | MATHIES | Washington County, CO | Gas Property | Dec 2025 |
| 3302 | MATRIX | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3303 | MATSUSHIMA | Weld County, CO | Oil & Gas Property | Nov 2018 |
| 3304 | MATSUSHIMA | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3305 | MAUDLIN GULCH | Moffat County, CO | Oil & Gas Property | Jun 2024 |
| 3306 | MAUL | Adams County, CO | Oil & Gas Property | May 2018 |
| 3307 | MAURICE | Yuma County, CO | Oil & Gas Property | Nov 2025 |
| 3308 | MAVERICK | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3309 | MAVERICK 2W | Weld County, CO | Oil & Gas Property | Oct 2025 |
| 3310 | MAVERICK STATE | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3311 | MAX B11-64-1HN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3312 | MAXEY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3313 | MAY JON | Weld County, CO | Oil & Gas Property | Apr 2016 |
| 3314 | MAYBERRY | Baca County, CO | Gas Property | Sep 2007 |
| 3315 | MAYEDA | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 3316 | MAYER | Weld County, CO | Oil & Gas Property | Dec 2022 |
| 3317 | MAYER | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 3318 | MAYFIELD | La Plata County, CO | Gas Property | Nov 2025 |
| 3319 | MAYFIELD MELTON | La Plata County, CO | Gas Property | Nov 2025 |
| 3320 | MAYNARD | Yuma County, CO | Gas Property | Nov 2025 |
| 3321 | MAZATLAN 23-25 | Las Animas County, CO | Gas Property | Dec 2025 |
| 3322 | MB LARSON C 5 | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 3323 | MC 3-1HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3324 | MC 3-2HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3325 | MC 3-3HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3326 | MC 3-4HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3327 | MC 3-5HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3328 | MC 3-6HZ | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3329 | MCCAFFREY STATE LD12-7 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3330 | MCCALL | Yuma County, CO | Gas Property | Nov 2025 |
| 3331 | MCCALLUM | Jackson County, CO | Oil & Gas Property | Nov 2025 |
| 3332 | MCCALLUM | Jackson County, CO | Oil & Gas Property | Nov 2025 |
| 3333 | MCCALLUM UNIT | Jackson County, CO | Oil & Gas Property | Nov 2025 |
| 3334 | MCCARTHY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3335 | MCCARTY | Boulder County, CO | Oil & Gas Property | Sep 2025 |
| 3336 | MCCARTY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3337 | MCCARVILLE | La Plata County, CO | Gas Property | Dec 2025 |
| 3338 | MCCASLAND | Yuma County, CO | Gas Property | Nov 2025 |
| 3339 | MCCASLIN | Yuma County, CO | Gas Property | Nov 2025 |
| 3340 | MCCATHRON A | La Plata County, CO | Gas Property | Nov 2025 |
| 3341 | MCCAW | La Plata County, CO | Gas Property | Nov 2025 |
| 3342 | MCCLAY | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 3343 | MCCLELLAN | Weld County, CO | Oil & Gas Property | Feb 2017 |
| 3344 | MCCLOSKEY | Weld County, CO | Oil & Gas Property | Jun 2017 |
| 3345 | MCCLUNG 29 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 3346 | MCCONAHAY | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3347 | MCCONLEY | Logan County, CO | Oil Property | May 2015 |
| 3348 | MCCONNELL | Yuma County, CO | Gas Property | Nov 2025 |
| 3349 | MCCONNELL | Yuma County, CO | Gas Property | Nov 2025 |
| 3350 | MCCORMICK | Cheyenne County, CO | Oil & Gas Property | Nov 2025 |
| 3351 | MCCORMICK | Weld County, CO | Oil & Gas Property | Feb 2023 |
| 3352 | MCCOY | Weld County, CO | Oil & Gas Property | Nov 2021 |
| 3353 | MCCOY | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3354 | MCCREATH | Washington County, CO | Gas Property | Dec 2025 |
| 3355 | MCCULLOCH | La Plata County, CO | Gas Property | Dec 2025 |
| 3356 | MCCULLOGH 1 | La Plata County, CO | Gas Property | Dec 2025 |
| 3357 | MCCULLOUGH 34-32 | Las Animas County, CO | Gas Property | Dec 2025 |
| 3358 | MCDANIEL | Mesa County, CO | Oil & Gas Property | Nov 2025 |
| 3359 | MCDONALD | Las Animas County, CO | Gas Property | Dec 2025 |
| 3360 | MCDONALD | Boulder County, CO | Oil & Gas Property | Nov 2025 |
| 3361 | MCDONALD | Weld County, CO | Oil & Gas Property | Jun 2024 |
| 3362 | MCDONALD | Yuma County, CO | Gas Property | Nov 2025 |
| 3363 | MCDONALD | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3364 | MCDONALD | La Plata County, CO | Gas Property | Dec 2025 |
| 3365 | MCELMO DOME | Montezuma County, CO | Oil & Gas Property | Dec 2025 |
| 3366 | MCELMO DOME UNIT 3 | Montezuma County, CO | Oil & Gas Property | Dec 2025 |
| 3367 | MCELMO DOME UNIT 31-38-18 HB | Montezuma County, CO | Oil & Gas Property | Dec 2025 |
| 3368 | MCELVAIN | La Plata County, CO | Gas Property | Nov 2025 |
| 3369 | MCELVAIN | La Plata County, CO | Gas Property | Nov 2019 |
| 3370 | MCELWAIN | Adams County, CO | Oil & Gas Property | Jul 2021 |
| 3371 | MCELWAIN 12 | Mesa County, CO | Oil & Gas Property | Nov 2025 |
| 3372 | MCGIRR | Larimer County, CO | Oil & Gas Property | Dec 2025 |
| 3373 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3374 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | May 2018 |
| 3375 | MCGLOTHLIN | Weld County, CO | Oil & Gas Property | Oct 2024 |
| 3376 | MCGUCKIN | Weld County, CO | Oil & Gas Property | Mar 2021 |
| 3377 | MCINTOSH | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 3378 | MCINTYRE | Moffat County, CO | Oil & Gas Property | Oct 2015 |
| 3379 | MCINTYRE CANY | San Miguel County, CO | Oil & Gas Property | Nov 2023 |
| 3380 | MCKAY FEDERAL AB02-15 | Weld County, CO | Oil Property | Dec 2025 |
| 3381 | MCKEE | Weld County, CO | Oil & Gas Property | Oct 2017 |
| 3382 | MCKEE UTE 01-26 1 | La Plata County, CO | Gas Property | Nov 2025 |
| 3383 | MCKEEN | La Plata County, CO | Gas Property | Nov 2025 |
| 3384 | MCKENNEY | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 3385 | MCKENNEY 1 | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 3386 | MCKINLEY | Weld County, CO | Oil & Gas Property | Aug 2017 |
| 3387 | MCKINSTRY | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 3388 | MCLAUGHLIN | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 3389 | MCLAUGHLIN | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 3390 | MCLAUGHLIN | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 3391 | MCLAUGHLIN-CONSOLIDATED-G 8 | Rio Blanco County, CO | Oil & Gas Property | Dec 2025 |
| 3392 | MCLEOD | Weld County, CO | Oil & Gas Property | Jul 2022 |
| 3393 | MCLIN | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 3394 | MCMAHAN | La Plata County, CO | Gas Property | Nov 2025 |
| 3395 | MCMANUS 33-22 | La Plata County, CO | Gas Property | Nov 2025 |
| 3396 | MCMILLEN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3397 | MCNARY | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 3398 | MCNEAR | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 3399 | MCPEEK | Weld County, CO | Oil & Gas Property | Sep 2024 |
| 3400 | MCPHERSON A | Garfield County, CO | Oil & Gas Property | Dec 2025 |