| 1 | L E Carpenter Oil & Gas, Inc. | | Oil & Gas Operator | Sep 1985 |
| 2 | L.L. Oil Company | Freer, TX 78357 | Oil & Gas Operator | Dec 2024 |
| 3 | La. Fete Oil & Gas, Inc. | | Oil & Gas Operator | May 1995 |
| 4 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 5 | La. Onshore Properties Inc. | | Oil & Gas Operator | Dec 2000 |
| 6 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 7 | Lakeside Resources | | Oil & Gas Operator | Mar 1989 |
| 8 | Lamar Hunt | | Oil & Gas Operator | Oct 2003 |
| 9 | Las Services, Inc. | | Oil & Gas Operator | Oct 1997 |
| 10 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 11 | Lavino Oil And Gas Company | | Oil & Gas Operator | Aug 1989 |
| 12 | Leeward Operators LLC | | Oil & Gas Operator | Jul 2011 |
| 13 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 14 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Dec 2024 |
| 15 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489-2489 | Oil & Gas Operator | Dec 2021 |
| 16 | Liberty Resources, Inc. | | Oil & Gas Operator | Jun 2024 |
| 17 | Linder Oil Company | | Oil & Gas Operator | Apr 1985 |
| 18 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2024 |
| 19 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 20 | Longhorn Oil & Gas Company | | Oil & Gas Operator | Sep 1982 |
| 21 | Louisiana Gas System, Inc. | | Oil Operator | Apr 2004 |
| 22 | Luca Operation, LLC | | Oil & Gas Operator | Feb 2016 |
| 23 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |