| 1 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 2 | Lafayette Oilfield Contractors, Inc. | | Oil Operator | Dec 2024 |
| 3 | Lago Petroleum Co. | | Oil & Gas Operator | Jan 1992 |
| 4 | Lakeside Resources | | Oil & Gas Operator | Mar 1989 |
| 5 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 6 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 7 | Las Services, Inc. | | Oil & Gas Operator | Oct 1997 |
| 8 | Lea Exploration, Inc. | | Oil & Gas Operator | Nov 1989 |
| 9 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 10 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 11 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 12 | Lighthouse Operating, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jun 2021 |
| 13 | Louisiana Energy Consultants, Inc. | | Oil & Gas Operator | Dec 2024 |
| 14 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 15 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Oct 2025 |
| 16 | Lynal, Inc. | | Oil & Gas Operator | Oct 1988 |
| 17 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |