| 1 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | Dec 2023 |
| 2 | Kastle Resources Enterprises Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2023 |
| 3 | Kavouras Thomas | Apollo, PA 15613-1108 | Oil & Gas Operator | Dec 2023 |
| 4 | KCS Energy Inc | Warren, PA 16365-0187 | Oil & Gas Operator | Dec 2023 |
| 5 | Keane Dev | Bradford, PA 16701-3901 | Oil & Gas Operator | Dec 1998 |
| 6 | Keck Timothy A | Summerville, PA 15864-6301 | Gas Operator | Dec 2014 |
| 7 | Keyrock Energy LLC | Johnson City, TN 37604-5749 | Oil & Gas Operator | Dec 2020 |
| 8 | Keystone Energy Oil & Gas Inc | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2016 |
| 9 | Kidder Exploration Inc | Jamestown, NY 14701-5613 | Gas Operator | Dec 1991 |
| 10 | Kimmel Glenn | Shelocta, PA 15774-2233 | Gas Operator | Dec 2021 |
| 11 | Kis Oil & Gas Inc | Brookville, PA 15825-4210 | Oil & Gas Operator | Dec 2014 |
| 12 | Koebley Timothy W | Warren, PA 16365-2102 | Oil & Gas Operator | Dec 2023 |
| 13 | Kriebel Acquisition Co LLC | Clarion, PA 16214-6161 | Oil & Gas Operator | Dec 2023 |
| 14 | Kriebel Gas Inc | | Oil & Gas Operator | Dec 1999 |
| 15 | Kriebel Minerals Inc | Clarion, PA 16214-6161 | Oil & Gas Operator | Dec 2020 |
| 16 | Kriebel Wells Dissolution Co LLC | | Oil & Gas Operator | Dec 2023 |
| 17 | KSM Energy Inc | Pittsburgh, PA 15238-3156 | Gas Operator | Dec 2022 |
| 18 | Kylander Oil Inc | | Oil & Gas Operator | Dec 2023 |
| 19 | Kyle Energy Inc NV | Apollo, PA 15613-0249 | Gas Operator | Dec 1996 |