| 1 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 2 | Fieldwood Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 3 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 4 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 5 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 6 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Nov 2024 |
| 7 | Flash Gas & Oil Northeast, Inc | | Oil & Gas Operator | May 2007 |
| 8 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 9 | FMP Operating Co., LTD. PTN. | | Oil & Gas Operator | Mar 1990 |
| 10 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 11 | Forman Petroleum Corporation | | Oil & Gas Operator | Aug 2001 |
| 12 | Fortuna Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2014 |
| 13 | Forza Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2024 |
| 14 | Franks Petroleum Inc. | | Oil & Gas Operator | Nov 1994 |
| 15 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 16 | Franks-Petrofunds & Vermilion | | Oil & Gas Operator | Aug 1989 |
| 17 | French Production Incorporated | Houston, TX 77086 | Oil & Gas Operator | Dec 1997 |