| 1 | L P C Energy, Inc. | | Oil & Gas Operator | Mar 1985 |
| 2 | L. B. Simmons Energy, Inc. | Midland, TX BAD ADDR | Oil & Gas Operator | Oct 1996 |
| 3 | L.L. Oil Company | Freer, TX 78357 | Oil & Gas Operator | Oct 2025 |
| 4 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 5 | La Mesa Production, Inc. | | Oil & Gas Operator | Apr 2004 |
| 6 | La. Nap. Inc. Lanlock Res Inc | | Oil Operator | Feb 1995 |
| 7 | Labelle Petroleum, Inc. | | Oil & Gas Operator | Oct 1990 |
| 8 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 9 | Lafayette Oilfield Contractors, Inc. | | Oil Operator | Dec 2024 |
| 10 | Lamar Oil & Gas, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Oct 2025 |
| 11 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 12 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 13 | Layline Petroleum I, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2013 |
| 14 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 15 | Lee Mills | | Oil Operator | Feb 1992 |
| 16 | Lee Roy Daigle | | Oil Operator | Dec 1992 |
| 17 | Legendary Oil Co., Inc. | | Oil Operator | Feb 2004 |
| 18 | Legendary Well Service, Inc. | | Oil Operator | Jan 1996 |
| 19 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 20 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |
| 21 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 22 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 23 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Oct 2025 |
| 24 | Littlefield Oil & Gas Company | | Oil & Gas Operator | Jan 1990 |
| 25 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 26 | Llog Exploration & Prod Co | | Oil & Gas Operator | Jul 2000 |
| 27 | Llox, L.L.C. | Covington, LA 70433 | Oil & Gas Operator | Oct 2025 |
| 28 | Longhorn Oil & Gas Company | | Oil & Gas Operator | Sep 1982 |
| 29 | Louisiana Gas System, Inc. | | Oil Operator | Apr 2004 |
| 30 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 31 | Loyd E. Simar | | Oil & Gas Operator | Aug 2001 |