| 301 | COLLUMS UNIT PATENT | Campbell County, WY | Oil & Gas Property | Sep 2001 |
| 302 | COLONY | Big Horn County, WY | Oil & Gas Property | Jul 2026 |
| 303 | COLONY FEE PATENTED | Big Horn County, WY | Oil & Gas Property | Jul 2026 |
| 304 | COLUMBINE | Crook County, WY | Oil Property | May 2002 |
| 305 | COLUMBUS | Hot Springs County, WY | Oil & Gas Property | Jul 2026 |
| 306 | COMBS | Laramie County, WY | Oil & Gas Property | Dec 2010 |
| 307 | COMBS 1 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 308 | COMBS 2 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 309 | COMBS 7-33-70 USA C SX 1 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 310 | COMBS 8-33-70 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 311 | COMBS RANCH | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 312 | COMBS RANCH 11-33-70 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 313 | COMET FED 3470-3031 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 314 | COMINGS | Crook County, WY | Oil Property | Apr 2026 |
| 315 | COMPASS CS FEDERAL | Campbell County, WY | Gas Property | Aug 2018 |
| 316 | CONDON | Campbell County, WY | Oil & Gas Property | Oct 1999 |
| 317 | CONDOR FEDERAL | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 318 | CONGO 0508-0 | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 319 | CONLEY DRAW | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 320 | CONNAGHAN | Hot Springs County, WY | Oil & Gas Property | Jul 2026 |
| 321 | CONNAGHAN | Park County, WY | Oil & Gas Property | Jul 2026 |
| 322 | CONOCO-FED | Campbell County, WY | Oil & Gas Property | Feb 2024 |
| 323 | CONVERSE SHEEP | Niobrara County, WY | Oil & Gas Property | Feb 2025 |
| 324 | COOK | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 325 | COOK | Campbell County, WY | Gas Property | Sep 2011 |
| 326 | COOK STATE | Campbell County, WY | Gas Property | Jun 2015 |
| 327 | COONEY | Laramie County, WY | Oil Property | Jul 2026 |
| 328 | COOPER | Campbell County, WY | Gas Property | Jan 2013 |
| 329 | COOPER COVE UNIT | Carbon County, WY | Oil & Gas Property | Jul 2026 |
| 330 | COOPER RES | Natrona County, WY | Oil & Gas Property | Jun 2026 |
| 331 | COPPER MOUNTAIN | Fremont County, WY | Oil & Gas Property | Sep 2022 |
| 332 | COPPER RIDGE | Sweetwater County, WY | Oil & Gas Property | Dec 2007 |
| 333 | COPPERHEAD | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 334 | CORBETT | Hot Springs County, WY | Oil Property | Jun 2025 |
| 335 | CORDELL | Crook County, WY | Oil & Gas Property | Sep 2018 |
| 336 | CORK 30 | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 337 | CORONA | Sublette County, WY | Oil & Gas Property | Jun 2026 |
| 338 | CORONADO | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 339 | CORONADO | Lincoln County, WY | Oil & Gas Property | Sep 2001 |
| 340 | CORRAL CREEK | Washakie County, WY | Oil & Gas Property | Jan 2019 |
| 341 | CORVUS 2734-09H | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 342 | COSEKA | Washakie County, WY | Oil & Gas Property | Apr 2024 |
| 343 | COSNER | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 344 | COSNER | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 345 | COSNER 11S | Campbell County, WY | Gas Property | Aug 2009 |
| 346 | COTTON | Weston County, WY | Oil Property | Aug 2022 |
| 347 | COTTONWOOD | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 348 | COTTONWOOD | Sublette County, WY | Oil & Gas Property | Jul 2026 |
| 349 | COTTONWOOD | Washakie County, WY | Oil & Gas Property | Jul 2026 |
| 350 | COTTONWOOD | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 351 | COTTONWOOD CREEK UN | Washakie County, WY | Oil & Gas Property | Apr 2026 |
| 352 | COTTONWOOD DR | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 353 | COUGAR | Laramie County, WY | Oil & Gas Property | Jul 2026 |
| 354 | COUGHLAN | Niobrara County, WY | Oil Property | Aug 1997 |
| 355 | COUGHLIN | Albany County, WY | Oil & Gas Property | Jul 2026 |
| 356 | COUSINS CS FEDERAL | Campbell County, WY | Gas Property | Jan 2015 |
| 357 | COUSINS FEDERAL COM 2 | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 358 | COW CREEK | Carbon County, WY | Oil & Gas Property | Jun 2026 |
| 359 | COW CREEK | Lincoln County, WY | Oil & Gas Property | Jul 2026 |
| 360 | COW HOLLOW | Lincoln County, WY | Oil & Gas Property | Jun 2026 |
| 361 | COWBOY FED 3671-10 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 362 | COWGER | Weston County, WY | Oil & Gas Property | Jul 2026 |
| 363 | COWGIRL FED 3574-0214 3NH | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 364 | COX-FEDERAL | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 365 | COYOTE 3422 | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 366 | COYOTE DRAW FEDERAL 1H | Weston County, WY | Oil & Gas Property | Jul 2026 |
| 367 | COZZENS | Big Horn County, WY | Oil & Gas Property | Jul 2026 |
| 368 | CRARY | Converse County, WY | Oil Property | Jan 1985 |
| 369 | CRATER | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 370 | CRAVEN CREEK UNIT | Lincoln County, WY | Oil & Gas Property | Jul 2026 |
| 371 | CRAWFORD 1 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 372 | CRAWFORD DR | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 373 | CRAZY BUFFALO 2H | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 374 | CRAZY WOMAN CANYON 3875-17-8-1NH | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 375 | CRAZY WOMAN FED | Johnson County, WY | Gas Property | Jun 2026 |
| 376 | CRESTA 4471-1819-1PH | Campbell County, WY | Oil & Gas Property | Jun 2026 |
| 377 | CRESTON | Carbon County, WY | Oil & Gas Property | Aug 2021 |
| 378 | CRESTON | Carbon County, WY | Oil & Gas Property | Jun 2026 |
| 379 | CRESTON | Carbon County, WY | Oil & Gas Property | Jun 2026 |
| 380 | CRESTON III UNIT | Carbon County, WY | Oil & Gas Property | Jun 2026 |
| 381 | CRESTON JUNCTION 1 | Sweetwater County, WY | Oil & Gas Property | Jun 2026 |
| 382 | CRESWELL | Campbell County, WY | Gas Property | May 2012 |
| 383 | CRICKET | Park County, WY | Oil & Gas Property | Jul 2026 |
| 384 | CRIMSON | Sublette County, WY | Oil & Gas Property | Jun 2026 |
| 385 | CROOKS GAP | Fremont County, WY | Oil & Gas Property | Jun 2026 |
| 386 | CROSBY 25 | Park County, WY | Oil & Gas Property | Jun 2018 |
| 387 | CROSS 57-76-19 | Sheridan County, WY | Gas Property | Jun 2015 |
| 388 | CROSS GAS | Big Horn County, WY | Oil & Gas Property | Jul 2026 |
| 389 | CROSSBOW | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 390 | CROTALUS | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 391 | CROW CREEK | Laramie County, WY | Oil & Gas Property | Jul 2026 |
| 392 | CROW UNIT | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 393 | CROW UNIT 3 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 394 | CROWE 2 | Natrona County, WY | Oil Property | Jul 2026 |
| 395 | CRU BRANNON-HARRIS A | Johnson County, WY | Oil Property | Jul 2026 |
| 396 | CRU CELLERS | Johnson County, WY | Oil Property | Jul 2026 |
| 397 | CRUDE CAT FEDERAL | Johnson County, WY | Oil & Gas Property | Jul 2026 |
| 398 | CRUMP | Campbell County, WY | Gas Property | Aug 2010 |
| 399 | CRUMP | Campbell County, WY | Gas Property | Oct 2017 |
| 400 | CRUMP FED | Campbell County, WY | Gas Property | Oct 2017 |