| 1 | F & S Oil | | Oil Operator | Dec 2021 |
| 2 | Fairman Corp | Du Bois, PA 15801-0288 | Oil & Gas Operator | Dec 2024 |
| 3 | Fairman Drilling Co | Du Bois, PA 15801-0288 | Oil & Gas Operator | Dec 2002 |
| 4 | Fairman Oil & Gas Co Inc | Oil City, PA 16301 | Oil & Gas Operator | Dec 1991 |
| 5 | Farabaugh Arthur R & John A | Loretto, PA 15940-8001 | Gas Operator | Dec 2015 |
| 6 | Farrington & Hepler Gas & Oil Inc | Seneca, PA 16346-0546 | Oil & Gas Operator | Dec 2024 |
| 7 | Fawnwood Energy Inc | Bruin, PA 16022-0157 | Oil & Gas Operator | Dec 2019 |
| 8 | Feikls Oil & Gas Inc | Eagle, ID 83616-7713 | Oil & Gas Operator | Dec 2024 |
| 9 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 10 | Fetterman Samuel C SR | Rossiter, PA 15772 | Gas Operator | Dec 2022 |
| 11 | First Alliance CH | Erie, PA 16506-5024 | Gas Operator | Dec 2017 |
| 12 | First Amer Energy Inc | Bradford, PA 16701-0184 | Oil & Gas Operator | Dec 2024 |
| 13 | Flanigan Bros | Edinboro, PA 16412-1443 | Oil & Gas Operator | Dec 2024 |
| 14 | Flatirons Development LLC | Westminster, CO 80020-2771 | Gas Operator | Dec 2015 |
| 15 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Dec 2025 |
| 16 | Fork Run Oil & Gas LLC | Sheffield, PA 16347-0012 | Oil & Gas Operator | Dec 2024 |
| 17 | Formentera Opr LLC | Austin, TX 78701-4889 | Gas Operator | Sep 2025 |
| 18 | Forrest Richard E | New Bethlehem, PA 16242-2547 | Gas Operator | Dec 2019 |
| 19 | Fortress Energy Corp | Pittsburgh, PA 15217-4207 | Oil & Gas Operator | Dec 2023 |
| 20 | Frank L Washabaugh Oil Producers | Imperial, PA 15126-1050 | Oil & Gas Operator | Dec 2010 |
| 21 | Frederick Don C | Tylersburg, PA 16361-0066 | Gas Operator | Dec 1985 |
| 22 | Frederick Drilling Co & Sons Inc | Tylersburg, PA 16361-0066 | Oil & Gas Operator | Dec 2017 |
| 23 | Frontier Natural Resources | Bellefonte, PA 16823 | Gas Operator | Jun 2025 |