| 801 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 802 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 803 | Coterra Energy Inc | Coraopolis, PA 15108-9862 | Oil & Gas Operator | Mar 2026 |
| 804 | Coterra Energy Operating Co. | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 805 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 806 | Cotton Valley Operations, Inc. | Longview, TX 75608 | Oil & Gas Operator | Jun 2026 |
| 807 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2025 |
| 808 | Cotton, W. L. | Hebbronville, TX 78361 | Oil & Gas Operator | Mar 1996 |
| 809 | Cotton, W.L. Gems & Minerals LTD | Hebbronville, TX 78361 | Oil & Gas Operator | May 2000 |
| 810 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 811 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 812 | Cotula Oil & Gas Co., Inc. | Cross Plains, TX 76443 | Oil Operator | Jun 2026 |
| 813 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Jun 2026 |
| 814 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 815 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 816 | Cougar Oil & Gas Co., Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2008 |
| 817 | Cougar Oil, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jun 2009 |
| 818 | County Line Resources LLC | Lancaster, TX 75146 | Oil Operator | Jun 2026 |
| 819 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 820 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 821 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2026 |
| 822 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 823 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 824 | Covenant Oil & Gas, L.P. | Houston, TX 77057 | Oil & Gas Operator | Dec 2006 |
| 825 | Covenant Oil Company | Houma, LA 70360 | Oil & Gas Operator | Dec 2015 |
| 826 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Jun 2026 |
| 827 | Covenant Production Co., L.C. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 828 | Covey Park Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Aug 2019 |
| 829 | Covey Park Resources LLC | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 830 | Cowboys Resources Corp. | New Braunfels, TX 78132 | Oil Operator | Jan 2008 |
| 831 | Cowrie Energy LLC | Austin, TX 78703 | Oil & Gas Operator | Jun 2026 |
| 832 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2026 |
| 833 | Cox Engineering, LLC | Abilene, TX 79605 | Oil Operator | Mar 2006 |
| 834 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 835 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 836 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 837 | Cox, H. L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2011 |
| 838 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 839 | Cox, Lee Investments Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Jun 2026 |
| 840 | Cox, Martin Regan | Irving, TX 75014 | Oil & Gas Operator | Jun 2026 |
| 841 | Cox, Robert G. & Associates,Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 1994 |
| 842 | Coyote Oil Company | Lufkin, TX 75915 | Oil & Gas Operator | Sep 1996 |
| 843 | Coyote Oil, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Jun 2026 |
| 844 | Coyote Operating, LLC | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 845 | Coyote Services, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2002 |
| 846 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 847 | CP Exploration III Operating,LLC | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2023 |
| 848 | CP Exploration TX Operating LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2017 |
| 849 | Cpmak Investments, Inc. | Cross Plains, TX 76443 | Oil Operator | Jun 2026 |
| 850 | CPX Energy Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Jun 2026 |
| 851 | CR Reed Production, Inc. | Gainesville, TX 76241 | Oil Operator | Jun 2026 |
| 852 | CR2 Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 853 | CR3 Operating Company, L.L.C. | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 854 | Cra-Gro Crop Service, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 855 | Crabtree And Brown, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Feb 1995 |
| 856 | Craft Resources, Inc. | Weston, TX 75097 | Oil & Gas Operator | Aug 2003 |
| 857 | Craig Oil, Inc. | Olney, TX 76374 | Oil Operator | Jun 2026 |
| 858 | Craig, Bob | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 859 | Craig, Carl | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 860 | Craig, J. E. G. Estate | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 861 | Craig, Robert A. | Olney, TX 76374 | Oil Operator | Jun 2026 |
| 862 | Craig, Wood B. & Bettie | Sunray, TX 79086 | Oil & Gas Operator | Aug 2005 |
| 863 | Craighead, Ray | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 864 | Craighead, Ray Well Service Inc | Wichita Falls, TX 76308 | Oil Operator | Apr 2019 |
| 865 | Craighead, Robert A. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 866 | Crain Minerals LLC | Oklahoma City, OK 73120-1004 | Oil & Gas Operator | Aug 2014 |
| 867 | Crampton, Freddie | Holliday, TX 76366 | Oil & Gas Operator | Jun 2026 |
| 868 | Cranford, Wayne | Electra, TX 76360 | Oil & Gas Operator | Dec 2019 |
| 869 | Craruth Energy Corporation | Abilene, TX 79602 | Oil & Gas Operator | Jun 2026 |
| 870 | Craton Energy Company II LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2006 |
| 871 | Craton Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2005 |
| 872 | Craton Energy Holdings III, LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2009 |
| 873 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Jun 2026 |
| 874 | Cravey, W. H. | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2012 |
| 875 | Crawford And Cameron Group | Houston, TX 77074 | Oil & Gas Operator | May 1997 |
| 876 | Crawford Energy Operating Co | Houston, TX 77056 | Oil & Gas Operator | Aug 2008 |
| 877 | Crawford Energy, Incorporated | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 878 | Crawford Hughes Operating Co. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2026 |
| 879 | Crawford Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Jul 2001 |
| 880 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 881 | Crazy Horse Operating LLC | Austin, TX 78731 | Oil & Gas Operator | Jun 2026 |
| 882 | CRD Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2021 |
| 883 | Creamer, Donald R., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2006 |
| 884 | Creative Oil & Gas Operating,LLC | Giddings, TX 78942 | Oil & Gas Operator | May 2024 |
| 885 | Creative Oil And Gas Op II, LLC | Santa Anna, TX 76878 | Oil Operator | Jun 2026 |
| 886 | Crebbs Oil Company | Batson, TX 77519 | Oil & Gas Operator | Jun 2024 |
| 887 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
| 888 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2026 |
| 889 | Creek Energy, Inc. | Brownwood, TX 76804 | Oil & Gas Operator | Jun 2026 |
| 890 | Creek Operating Company, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Sep 1998 |
| 891 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Jun 2026 |
| 892 | Cremson Oil & Gas | Coleman, TX 76834 | Oil & Gas Operator | Jun 2026 |
| 893 | Crenshaw Oil | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 2026 |
| 894 | Crenshaw, Joe R. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 895 | Crenshaw, K. M. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2018 |
| 896 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Feb 2026 |
| 897 | Crescent Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 898 | Crescent Exploration Company | Austin, TX 78767 | Oil & Gas Operator | Aug 1995 |
| 899 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 900 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2026 |