| 1 | L & F Drilling Co., Inc. (1) | Corpus Chrsti, TX 78479 | Oil & Gas Operator | Mar 2025 |
| 2 | L.T.D. Explorations Inc. | Alice, TX 78333 | Oil & Gas Operator | Mar 2025 |
| 3 | Lagarto Company, The | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 1995 |
| 4 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 5 | Layton Energy Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 6 | Leach, D.L.,Jr. | Edna, TX 77957 | Gas Operator | Oct 2007 |
| 7 | Legado Gulf Coast, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2010 |
| 8 | Liberty Production Co | Houston, TX 77002 | Oil & Gas Operator | Nov 1994 |
| 9 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 10 | LNR Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 11 | Lodi Drilling & Service Co. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Mar 2025 |
| 12 | Lodi Operating Company LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Mar 2025 |
| 13 | Lower Colorado River Authority | Bastrop, TX 78602 | Oil & Gas Operator | Mar 2025 |
| 14 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 15 | Lundberg Operating Corporation | Dallas, TX 75225 | Oil & Gas Operator | Oct 2002 |
| 16 | Lynbrook Oil Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2008 |
| 17 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Mar 2025 |