| 801 | CLOVIS | La Plata County, CO | Gas Property | Feb 2024 |
| 802 | CO STATE A | Adams County, CO | Oil & Gas Property | May 2018 |
| 803 | COAL CREEK | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 804 | COALBANK CREEK | Weld County, CO | Oil & Gas Property | Jul 2019 |
| 805 | COALVIEW G02-6 | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 806 | COAN | Adams County, CO | Oil & Gas Property | Jan 2024 |
| 807 | COAN | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 808 | COB PARTNERSHIP | Yuma County, CO | Gas Property | Jun 2022 |
| 809 | COBRA | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 810 | COCHRAN | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 811 | COCKLEBUR DRAW | San Miguel County, CO | Oil & Gas Property | Jun 2023 |
| 812 | COCKROFT | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 813 | COCKROFT | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 814 | CODY | Jackson County, CO | Oil Property | Jan 2024 |
| 815 | CODY D | Weld County, CO | Oil & Gas Property | Mar 2022 |
| 816 | COE TRUST | Cheyenne County, CO | Oil & Gas Property | Feb 2024 |
| 817 | COFFELT 5-61-35 | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 818 | COGBURN | Baca County, CO | Gas Property | Jan 2008 |
| 819 | COGGINS | Elbert County, CO | Oil & Gas Property | May 2018 |
| 820 | COLAND | Weld County, CO | Oil & Gas Property | Oct 2021 |
| 821 | COLEMAN | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 822 | COLFER | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 823 | COLLINS 18 | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 824 | COLOHAN | Garfield County, CO | Oil & Gas Property | Feb 2024 |
| 825 | COLORADO | La Plata County, CO | Gas Property | Feb 2024 |
| 826 | COLORADO | Morgan County, CO | Oil Property | Nov 2002 |
| 827 | COLORADO | Logan County, CO | Oil Property | Nov 2018 |
| 828 | COLORADO ENERGY FEDERAL 14 | Weld County, CO | Oil Property | Jan 2018 |
| 829 | COLORADO STATE | Weld County, CO | Oil & Gas Property | Oct 2018 |
| 830 | COLORADO STATE | Washington County, CO | Oil Property | Nov 2020 |
| 831 | COLORADO STATE C | Adams County, CO | Oil & Gas Property | Oct 2019 |
| 832 | COLOROSO A | Garfield County, CO | Oil & Gas Property | Feb 2024 |
| 833 | COLT A13-6 | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 834 | COLTHARP | Rio Blanco County, CO | Oil & Gas Property | Jan 2024 |
| 835 | COLUMBINE SP | Garfield County, CO | Oil & Gas Property | Jan 2024 |
| 836 | COLUMBINE SPRINGS-FEDERAL | Rio Blanco County, CO | Oil & Gas Property | May 2015 |
| 837 | COMANCHE-FEDERAL | Baca County, CO | Oil & Gas Property | Jul 2002 |
| 838 | COMING 17 | Weld County, CO | Oil & Gas Property | May 2018 |
| 839 | COMMERCE CENTER | Weld County, CO | Oil & Gas Property | Jun 2019 |
| 840 | COMMERCE RANCH | Baca County, CO | Gas Property | Aug 2012 |
| 841 | COMMONS | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 842 | COMMUNITY | Larimer County, CO | Oil Property | Jan 2024 |
| 843 | COMO | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 844 | CONAGRA B | Weld County, CO | Oil & Gas Property | Aug 2017 |
| 845 | CONLEY | Archuleta County, CO | Gas Property | Jan 2024 |
| 846 | CONNELL | Weld County, CO | Oil & Gas Property | Jul 2019 |
| 847 | CONNER | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 848 | CONNIE 26 | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 849 | CONOCO | Fremont County, CO | Oil Property | Jan 2024 |
| 850 | CONOCO FEDERAL | Jackson County, CO | Oil & Gas Property | Oct 2013 |
| 851 | CONOCO-FEDERAL | Jackson County, CO | Oil & Gas Property | Jan 2024 |
| 852 | CONRAD | Yuma County, CO | Gas Property | Feb 2024 |
| 853 | CONRAD | La Plata County, CO | Gas Property | Feb 2024 |
| 854 | CONRAD FEDERAL | Weld County, CO | Oil & Gas Property | Oct 2016 |
| 855 | CONRAD FEDERAL | Yuma County, CO | Gas Property | Feb 2024 |
| 856 | CONRAD STATE | Yuma County, CO | Gas Property | Feb 2024 |
| 857 | CONTINENTAL | Rio Blanco County, CO | Oil & Gas Property | Jul 2022 |
| 858 | COOK | Weld County, CO | Oil & Gas Property | Jan 2018 |
| 859 | COOK | Yuma County, CO | Gas Property | Feb 2024 |
| 860 | COOK | Baca County, CO | Gas Property | Jan 2024 |
| 861 | COOK | Garfield County, CO | Oil & Gas Property | Feb 2024 |
| 862 | COOK | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 863 | COOK R | Garfield County, CO | Oil & Gas Property | Feb 2024 |
| 864 | COOLEY | Weld County, CO | Oil & Gas Property | Jun 2019 |
| 865 | COOPER 23-1 | Weld County, CO | Oil & Gas Property | Apr 2018 |
| 866 | COORDES | Adams County, CO | Oil & Gas Property | Nov 2022 |
| 867 | COORS | Rio Blanco County, CO | Oil & Gas Property | Jul 2022 |
| 868 | COORS | Weld County, CO | Oil & Gas Property | Nov 2020 |
| 869 | COORS ENERGY | Weld County, CO | Oil & Gas Property | Apr 2021 |
| 870 | COPPERHEAD 2 | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 871 | CORBIN | Weld County, CO | Oil & Gas Property | Dec 2018 |
| 872 | CORNISH | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 873 | CORRAL CREEK | Rio Blanco County, CO | Oil & Gas Property | Jan 2024 |
| 874 | COSSLETT | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 875 | COSSLETT | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 876 | COSSLETT HEIRS UU | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 877 | COSTIGAN | Weld County, CO | Oil & Gas Property | Feb 2023 |
| 878 | COT EAST | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 879 | COT WEST | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 880 | COTNER 35-14 | Garfield County, CO | Oil & Gas Property | Feb 2024 |
| 881 | COTTONWOOD | Weld County, CO | Oil & Gas Property | Jan 2021 |
| 882 | COTTONWOOD | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 883 | COTTONWOOD CREEK 4-65 2 | Arapahoe County, CO | Oil & Gas Property | Jan 2024 |
| 884 | COTTONWOOD GULCH | Moffat County, CO | Oil & Gas Property | Feb 2024 |
| 885 | COUCH 01-16U | La Plata County, CO | Gas Property | Feb 2024 |
| 886 | COUEY | Garfield County, CO | Oil & Gas Property | Feb 2024 |
| 887 | COUEY FEDERAL | Garfield County, CO | Oil & Gas Property | Feb 2024 |
| 888 | COUFAL | Weld County, CO | Oil & Gas Property | Apr 2017 |
| 889 | COULSON 2 | Weld County, CO | Oil & Gas Property | Oct 2019 |
| 890 | COUNTER | Weld County, CO | Oil & Gas Property | Oct 2023 |
| 891 | COUNTY LINE 3 | Weld County, CO | Oil & Gas Property | Dec 2023 |
| 892 | COURTNEY | Weld County, CO | Oil & Gas Property | Jul 2014 |
| 893 | COW SKULL 11-89-18 | Gunnison County, CO | Gas Property | Mar 2024 |
| 894 | COWBOY 21 | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 895 | COWLES | Washington County, CO | Oil Property | Jan 2024 |
| 896 | COX 1 | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 897 | COX 1161 | Weld County, CO | Oil & Gas Property | Aug 2020 |
| 898 | COX 34 | Yuma County, CO | Gas Property | Feb 2024 |
| 899 | COX 5 | Weld County, CO | Oil & Gas Property | Feb 2024 |
| 900 | COX CANYON | La Plata County, CO | Gas Property | Oct 2016 |