| 1 | Lee Brothers Oil Co. | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 2 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 3 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Dec 2024 |
| 4 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 5 | LGDC Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 6 | Linc Gulf Coast Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | Dec 2024 |
| 7 | Lindow Oil & Gas, LLC | Caldwell, TX 77836 | Oil & Gas Operator | Dec 2024 |
| 8 | Live Oak Op & Production, L.L.C. | Austin, TX 78759 | Oil & Gas Operator | Nov 2011 |
| 9 | Llog Exploration Texas, L.P. | Covington, LA 70433 | Oil & Gas Operator | Dec 2024 |
| 10 | Loin Energy Corporation | La Grange, TX 78945 | Oil & Gas Operator | Dec 2024 |
| 11 | Lone Wolf Operating Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2005 |
| 12 | Lone Wolf Operating Company, LP | Haxtun, CO 80731 | Oil & Gas Operator | Sep 2009 |
| 13 | Lozano Oil Company Inc. | Houston, TX 77082 | Oil & Gas Operator | Dec 2024 |
| 14 | LT Oil LLC | San Marcos, TX 78666 | Oil Operator | Dec 2024 |
| 15 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 16 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Dec 2024 |
| 17 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |