| 1 | Laguna Oil & Gas Corp. | Weesatche, TX 77993 | Oil & Gas Operator | Mar 2025 |
| 2 | Lance Exploration Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1994 |
| 3 | Lapco Oil & Gas Company | Houston, TX 77069 | Oil & Gas Operator | Oct 2015 |
| 4 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 5 | Legacy Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2025 |
| 6 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 7 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 8 | Lighthouse Exploration, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jul 2007 |
| 9 | Lightning Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2025 |
| 10 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 11 | Linc Gulf Coast Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | Mar 2025 |
| 12 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Mar 2025 |
| 13 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 14 | Louisiana Energy Consultant Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 15 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 16 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Mar 2025 |
| 17 | Lundberg Operating Corporation | Dallas, TX 75225 | Oil & Gas Operator | Oct 2002 |
| 18 | Lynd, J. L., Inc. | Austin, TX 78716 | Oil & Gas Operator | Sep 2009 |
| 19 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Mar 2025 |