| 1 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2024 |
| 2 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Feb 2024 |
| 3 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Dec 2023 |
| 4 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2024 |
| 5 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 6 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 7 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 8 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
| 9 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 10 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2024 |
| 11 | City Of Garden City, Kansas | Garden City, KS 67846 | Gas Operator | Dec 2023 |
| 12 | City Of Hugoton, Kansas | Hugoton, KS 67951 | Gas Operator | Dec 2023 |
| 13 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 14 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | Feb 2024 |
| 15 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 16 | Continental Energy | Garden City, KS 67846-0918 | Oil & Gas Operator | Jul 2017 |
| 17 | Cross Bar Petrol | | Oil Operator | Aug 1995 |
| 18 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2023 |