| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | L & L Supply | Oil Operator | Dec 1994 | |
| 2 | L'Oil Operating And MGMT. Co. | Oil & Gas Operator | Dec 2008 | |
| 3 | L.J. Exploration, Inc. | Oil & Gas Operator | Dec 2020 | |
| 4 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |
| 5 | Laser Gas Company I, LLC | Oil Operator | Aug 2007 | |
| 6 | Lax, Inc. | Oil & Gas Operator | Nov 1987 | |
| 7 | Lebus Oilfield Service Co | Oil Operator | Sep 2009 | |
| 8 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 9 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 10 | Louisiana Gas Development Corp | Oil & Gas Operator | Jan 2025 | |
| 11 | Louisiana-Hunt Petroleum Corp. | Oil & Gas Operator | Dec 1985 |