| 1 | Falls City Energy Corporation | Poth, TX 78147 | Oil & Gas Operator | May 2000 |
| 2 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 3 | Fiesta Energy LLC | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Nov 2025 |
| 4 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 5 | Finger Oil & Gas, Inc. | Castroville, TX 78009 | Oil & Gas Operator | May 2021 |
| 6 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Nov 2025 |
| 7 | First Light Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Nov 2025 |
| 8 | First Rock, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Nov 2025 |
| 9 | First Solid Energy Group, LP | Missouri City, TX 77489 | Oil & Gas Operator | Nov 2025 |
| 10 | Fletcher Operating, LLC | Fairhope, AL 36532 | Oil & Gas Operator | Nov 2025 |
| 11 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 12 | Forney & McCombs | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 13 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 14 | Forza Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2025 |
| 15 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Nov 2025 |
| 16 | Francisco Creek Operating, Inc. | Castroville, TX 78009 | Oil Operator | Nov 2025 |
| 17 | Freddy'S Well Service, Inc. | Victoria, TX 77902 | Oil & Gas Operator | May 2025 |
| 18 | Freeport-McMoran Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 19 | Frisco Oil Corporation | Tyler, TX 75701 | Oil & Gas Operator | Mar 2000 |