| 1 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 2 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 3 | La. Mining & Minerals, Inc. | | Oil & Gas Operator | Jul 2000 |
| 4 | Labelle Petroleum, Inc. | | Oil & Gas Operator | Oct 1990 |
| 5 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 6 | Lamson/Onshore Petroleum Corp. | | Oil & Gas Operator | Sep 1985 |
| 7 | Las Services, Inc. | | Oil & Gas Operator | Oct 1997 |
| 8 | Lea Exploration, Inc. | | Oil & Gas Operator | Nov 1989 |
| 9 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 10 | Legacy Resources Co., L.P. | | Oil & Gas Operator | Apr 2019 |
| 11 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 12 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Oct 2025 |
| 13 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 14 | Llog Exploration Company, L.L.C. | | Oil & Gas Operator | Jun 2025 |
| 15 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 16 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 17 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |