| 401 | CRUMP | Campbell County, WY | Gas Property | Aug 2010 |
| 402 | CRUMP | Campbell County, WY | Gas Property | Oct 2017 |
| 403 | CRUMP FED | Campbell County, WY | Gas Property | Oct 2017 |
| 404 | CSFED 1 | Sweetwater County, WY | Oil & Gas Property | Aug 2025 |
| 405 | CTU-FEE | Weston County, WY | Oil & Gas Property | Aug 1997 |
| 406 | CU DOWNS FED | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 407 | CU DOWNS FED 28 | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 408 | CU DOWNS FED 3 | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 409 | CU REPP FED 09-213769-1XTPH | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 410 | CULP DRAW | Johnson County, WY | Oil & Gas Property | Jan 2014 |
| 411 | CULP DRAW | Johnson County, WY | Oil & Gas Property | Sep 2025 |
| 412 | CUMMINGS | Uinta County, WY | Oil & Gas Property | Aug 2025 |
| 413 | CURIOSITY 0 | Sublette County, WY | Oil & Gas Property | Aug 2025 |
| 414 | CURTIS | Hot Springs County, WY | Oil & Gas Property | Aug 2025 |
| 415 | CUSHING | Laramie County, WY | Oil & Gas Property | Aug 2025 |
| 416 | CUSTER | Park County, WY | Oil & Gas Property | Aug 2025 |
| 417 | CUSTER CS FEDERAL | Campbell County, WY | Gas Property | Apr 2017 |
| 418 | CUSTER FED 4271-5 | Campbell County, WY | Oil & Gas Property | Aug 2025 |
| 419 | CUTTBOW 29-20-2H | Campbell County, WY | Oil & Gas Property | Sep 2025 |
| 420 | CUTTHROAT 1324 | Campbell County, WY | Oil & Gas Property | Aug 2025 |
| 421 | CW 3568-36-25 | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 422 | CWDU DILTS FED | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 423 | CWDU JRJ | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 424 | CWDU STEINLE FED 08-053870 | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 425 | CWDU STODDARD FED 11-023871 | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 426 | CWDU T-55 FED 06-313971 | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 427 | CWDU T-55 FED 31-063871-3XPH | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 428 | CWDU TILLARD FED 19-073871 | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 429 | CYNTHIA | Washakie County, WY | Oil Property | May 2025 |
| 430 | CYPHER CS FED | Campbell County, WY | Gas Property | Aug 2018 |
| 431 | CZAPLA | Campbell County, WY | Oil Property | Aug 1982 |