| 1 | F.E.Hargraves &Sons DRL.Co.Inc. | | Oil & Gas Operator | Mar 1992 |
| 2 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 3 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 4 | Fontainebleau Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 5 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 6 | Fortune Gas & Oil, Inc. | | Oil & Gas Operator | Apr 2004 |
| 7 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 8 | Foster-Brown Operations, Inc. | | Oil & Gas Operator | Apr 2003 |
| 9 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 10 | Four Star Oil Company | | Oil & Gas Operator | May 2015 |
| 11 | Fran Oil, Inc. | | Oil & Gas Operator | Dec 2024 |
| 12 | Franks & Petrofunds, Inc. | | Oil & Gas Operator | Sep 1989 |
| 13 | Franks Operating Company, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 14 | Franks Petroleum Inc. | | Oil & Gas Operator | Nov 1994 |
| 15 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 16 | Fre-Lyn, Inc. | | Oil Operator | Feb 1985 |
| 17 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |