| 1 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Jun 2025 |
| 2 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Oct 2025 |
| 3 | C E Energy LLC | Katy, TX 77449 | Oil Operator | Oct 2025 |
| 4 | C. O. Oil And Gas, LLC | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 5 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 6 | Cal-T Oil Company, Incorporated | Borger, TX 79008 | Oil & Gas Operator | Feb 2008 |
| 7 | Caldwell Production Co. Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2010 |
| 8 | Canadian River Trading Co II | Katy, TX 77449 | Oil & Gas Operator | Oct 2025 |
| 9 | Caprock Engineering, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2018 |
| 10 | Capstone Cactus Operating Comp. | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 11 | Casa Operations | Borger, TX 79007 | Oil & Gas Operator | Oct 2025 |
| 12 | Chance Energy Co. Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Sep 1999 |
| 13 | Chapter Petroleum | Borger, TX 79008 | Oil & Gas Operator | Mar 1997 |
| 14 | Chapter Petroleum, Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2001 |
| 15 | Chase Production Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 16 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 17 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 18 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 19 | Childers, J. C. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 20 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 21 | CKB Corporation | Borger, TX 79008 | Oil & Gas Operator | Aug 1997 |
| 22 | Classic Petroleum Partners, Inc. | Whitehouse, TX 75791 | Oil & Gas Operator | Oct 2025 |
| 23 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 24 | Cody Company | Amarillo, TX 79121 | Oil & Gas Operator | Mar 2020 |
| 25 | Comac Well Service, Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |
| 26 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 27 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 28 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 29 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 30 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Oct 2025 |
| 31 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Oct 2025 |
| 32 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Jun 2025 |
| 33 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 34 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |
| 35 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Oct 2025 |
| 36 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 37 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |