| 1 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 2 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 3 | First Energy Development Corp. | | Oil & Gas Operator | Sep 2008 |
| 4 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Dec 2025 |
| 5 | Flash Gas & Oil Northeast, Inc | | Oil & Gas Operator | May 2007 |
| 6 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 7 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 8 | Flynn Energy Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Mar 1993 |
| 9 | FMP Operating Company, LTD PTN | | Oil & Gas Operator | Mar 1990 |
| 10 | Fontenot Pet Land Services, Inc. | | Oil & Gas Operator | Aug 2002 |
| 11 | Forman Exploration Company | | Oil & Gas Operator | Oct 1988 |
| 12 | Frank C. VInson | | Oil & Gas Operator | May 1995 |
| 13 | Freeport Oil Company | New Orleans, LA 70112 | Oil & Gas Operator | Oct 1979 |
| 14 | Future Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2010 |