| 1 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 2 | Ladd Oil & Gas Corporation | Midland, TX 79711 | Oil & Gas Operator | Dec 2021 |
| 3 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Dec 2025 |
| 4 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 5 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Dec 2025 |
| 6 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 7 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 8 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2025 |
| 9 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 10 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Dec 2025 |
| 11 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 12 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 13 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 14 | Lipan Flats Production, L.L.C. | San Angelo, TX 76905 | Oil Operator | Dec 2025 |
| 15 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Sep 2025 |
| 16 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 17 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 18 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 19 | Los Hijos De Sanchez J LLC | Beeville, TX 78102 | Oil Operator | Dec 2025 |
| 20 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Dec 2025 |
| 21 | Lyon Operating Company Inc.(Iii) | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |