| 1 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 2 | Lainco Well Service, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Aug 2011 |
| 3 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Dec 2025 |
| 4 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 5 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 6 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 7 | Lapco Oil & Gas Company | Houston, TX 77069 | Oil & Gas Operator | Oct 2015 |
| 8 | Larance Engineering Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 1996 |
| 9 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 10 | Laroca Resources, LTD | Austin, TX 78709 | Oil & Gas Operator | Dec 2025 |
| 11 | Lawlis Oil Company | Hamlin, TX 79520 | Oil & Gas Operator | Dec 2025 |
| 12 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 13 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 14 | Leffel'S, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2020 |
| 15 | Lewis, James B. Land & Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Nov 1998 |
| 16 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 17 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 18 | Lodi Drilling & Service Co. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 19 | Lodi Operating Company LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 20 | Lone Star Operations LLC | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2025 |
| 21 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 22 | Lone Star Production | Lawn, TX 79530 | Oil & Gas Operator | Dec 2025 |
| 23 | Los Hijos De Sanchez J LLC | Beeville, TX 78102 | Oil Operator | Dec 2025 |
| 24 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 25 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |