| 1 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Oct 2025 |
| 2 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 3 | Cal-T Oil Company, Incorporated | Borger, TX 79008 | Oil & Gas Operator | Feb 2008 |
| 4 | Caldwell Production Co. Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2010 |
| 5 | Caprock Engineering, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2018 |
| 6 | Cartex Production | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 7 | Cartex Production Corp. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2000 |
| 8 | Chance Energy Co. Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Sep 1999 |
| 9 | Chase Production Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 10 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 11 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 12 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 13 | Childers, J. C. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 14 | Circle W Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 15 | Cirrus Exploration Company | Prosper, TX 75078 | Oil & Gas Operator | Oct 2025 |
| 16 | City Of White Deer | White Deer, TX 79097 | Gas Operator | May 2017 |
| 17 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 18 | Cody Company | Amarillo, TX 79121 | Oil & Gas Operator | Mar 2020 |
| 19 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 20 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 21 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Oct 2025 |
| 22 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Jun 2025 |
| 23 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 24 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |