| 301 | COMMERCE CENTER | Weld County, CO | Oil & Gas Property | Jun 2019 |
| 302 | COMMERCE RANCH | Baca County, CO | Gas Property | Sep 2012 |
| 303 | COMMONS | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 304 | COMMUNITY | Larimer County, CO | Oil Property | Jan 2024 |
| 305 | COMO | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 306 | CONAGRA B | Weld County, CO | Oil & Gas Property | Aug 2017 |
| 307 | CONLEY | Archuleta County, CO | Gas Property | Dec 2025 |
| 308 | CONNELL | Weld County, CO | Oil & Gas Property | Jul 2019 |
| 309 | CONNER | Weld County, CO | Oil & Gas Property | Oct 2025 |
| 310 | CONNIE 26 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 311 | CONOCO | Fremont County, CO | Oil Property | Dec 2025 |
| 312 | CONOCO FEDERAL | Jackson County, CO | Oil & Gas Property | Jul 2013 |
| 313 | CONOCO-FEDERAL | Jackson County, CO | Oil & Gas Property | Nov 2025 |
| 314 | CONQUEST 41-28 | Las Animas County, CO | Gas Property | Dec 2025 |
| 315 | CONRAD | Yuma County, CO | Gas Property | Nov 2025 |
| 316 | CONRAD | La Plata County, CO | Gas Property | Nov 2025 |
| 317 | CONRAD FEDERAL | Weld County, CO | Oil & Gas Property | Oct 2016 |
| 318 | CONRAD FEDERAL | Yuma County, CO | Gas Property | Nov 2025 |
| 319 | CONRAD STATE | Yuma County, CO | Gas Property | Nov 2025 |
| 320 | CONSTITUTION FEDERAL LC21-6 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 321 | CONTINENTAL | Rio Blanco County, CO | Oil & Gas Property | Jul 2022 |
| 322 | COOK | Weld County, CO | Oil & Gas Property | Jan 2018 |
| 323 | COOK | Yuma County, CO | Gas Property | Nov 2025 |
| 324 | COOK | Baca County, CO | Gas Property | Sep 2025 |
| 325 | COOK | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 326 | COOK | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 327 | COOK CARPENTER 20-3 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 328 | COOK EXXON | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 329 | COOK GARDNER 20-4 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 330 | COOK MARTIN 20-1 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 331 | COOK R | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 332 | COOLEY | Weld County, CO | Oil & Gas Property | Jun 2019 |
| 333 | COOPER 23-1 | Weld County, CO | Oil & Gas Property | Apr 2018 |
| 334 | COORDES | Adams County, CO | Oil & Gas Property | Nov 2022 |
| 335 | COORS | Rio Blanco County, CO | Oil & Gas Property | Jul 2022 |
| 336 | COORS | Weld County, CO | Oil & Gas Property | Nov 2020 |
| 337 | COORS ENERGY | Weld County, CO | Oil & Gas Property | Apr 2021 |
| 338 | COPPERHEAD 2 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 339 | CORBIN | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 340 | CORNISH | Weld County, CO | Oil & Gas Property | Aug 2025 |
| 341 | CORRAL CREEK | Rio Blanco County, CO | Oil & Gas Property | Nov 2025 |
| 342 | CORY JACK 33-7-11 2 | La Plata County, CO | Gas Property | Dec 2025 |
| 343 | COSSLETT | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 344 | COSSLETT | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 345 | COSSLETT EAST FEDERAL 1A-22H-H168 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 346 | COSSLETT HEIRS UU | Weld County, CO | Oil & Gas Property | Sep 2019 |
| 347 | COSTELLO 44-24 | Las Animas County, CO | Gas Property | Dec 2025 |
| 348 | COSTIGAN | Weld County, CO | Oil & Gas Property | Feb 2023 |
| 349 | COSWORTH FEDERAL 31-23 | Las Animas County, CO | Gas Property | Dec 2025 |
| 350 | COT EAST | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 351 | COT WEST | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 352 | COTNER 35-14 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 353 | COTTONTAIL PASS UNIT 34-24 | Las Animas County, CO | Gas Property | Dec 2025 |
| 354 | COTTONWOOD | Weld County, CO | Oil & Gas Property | Jan 2021 |
| 355 | COTTONWOOD | Weld County, CO | Oil & Gas Property | Mar 2025 |
| 356 | COTTONWOOD CREEK 4-65 2 | Arapahoe County, CO | Oil & Gas Property | Nov 2025 |
| 357 | COTTONWOOD GULCH | Moffat County, CO | Oil & Gas Property | Apr 2025 |
| 358 | COUCH 01-16U | La Plata County, CO | Gas Property | Nov 2025 |
| 359 | COUEY | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 360 | COUEY FEDERAL | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 361 | COUFAL | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 362 | COUGAR B 02-6 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 363 | COULSON 2 | Weld County, CO | Oil & Gas Property | Oct 2019 |
| 364 | COUNTER | Weld County, CO | Oil & Gas Property | Oct 2023 |
| 365 | COUNTY LINE 3 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 366 | COUNTYLINE 0508-1 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 367 | COURTNEY | Weld County, CO | Oil & Gas Property | Jul 2014 |
| 368 | COURY 18 | Mesa County, CO | Oil & Gas Property | Apr 2005 |
| 369 | COVEY 33-7-10 | La Plata County, CO | Gas Property | Nov 2025 |
| 370 | COW SKULL 11-89-18 | Gunnison County, CO | Gas Property | Dec 2025 |
| 371 | COWBOY 21 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 372 | COWLES | Washington County, CO | Oil Property | Nov 2025 |
| 373 | COX 1 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 374 | COX 1161 | Weld County, CO | Oil & Gas Property | Aug 2020 |
| 375 | COX 2 | Archuleta County, CO | Gas Property | Dec 2025 |
| 376 | COX 33 | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 377 | COX 34 | Yuma County, CO | Gas Property | Nov 2025 |
| 378 | COX 5 | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 379 | COX CANYON | La Plata County, CO | Gas Property | Oct 2016 |
| 380 | COX S | Cheyenne County, CO | Gas Property | Nov 2004 |
| 381 | COYLE | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 382 | COYOTE FED 0397-14 | Moffat County, CO | Oil & Gas Property | Nov 2025 |
| 383 | COYOTE TRAILS 3 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 384 | COZZENS | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 385 | CPC-BOHLENDER | Weld County, CO | Oil & Gas Property | Sep 2020 |
| 386 | CRADER | La Plata County, CO | Gas Property | Nov 2025 |
| 387 | CRAIG | La Plata County, CO | Gas Property | Nov 2025 |
| 388 | CRAIG | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 389 | CRAIG | Lincoln County, CO | Oil & Gas Property | Nov 2025 |
| 390 | CRAIG | Garfield County, CO | Oil & Gas Property | Dec 2025 |
| 391 | CRANDELL | Broomfield County, CO | Oil & Gas Property | Nov 2025 |
| 392 | CRANMER | Yuma County, CO | Gas Property | Nov 2025 |
| 393 | CRAVEN | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 394 | CRAWFORD | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 395 | CREAM | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 396 | CREAM STATE 2 | Weld County, CO | Oil & Gas Property | Dec 2025 |
| 397 | CREEK 29-01 | La Plata County, CO | Gas Property | Nov 2025 |
| 398 | CRICKET C22-3 | Weld County, CO | Oil & Gas Property | Sep 2016 |
| 399 | CRIEGLER | La Plata County, CO | Gas Property | Nov 2025 |
| 400 | CRIGLER MVRD UNIT 1 | La Plata County, CO | Gas Property | Nov 2025 |