| 1 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 2 | L7 Energy LLC | Wichita Falls, TX 76308 | Oil Operator | Oct 2025 |
| 3 | La VIda Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1993 |
| 4 | Lackey, William H. Oil And Gas | Shawnee, OK 74804 | Oil & Gas Operator | Feb 2024 |
| 5 | Ladd Oil & Gas Corporation | Midland, TX 79711 | Oil & Gas Operator | Dec 2021 |
| 6 | Ladd Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2008 |
| 7 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 8 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Oct 2025 |
| 9 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Oct 2025 |
| 10 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Oct 2025 |
| 11 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 12 | Ledger Operating Corporation | Abilene, TX 79601 | Oil Operator | Oct 2025 |
| 13 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 14 | Libertad Operating LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 15 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 16 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 17 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 18 | Lion Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2006 |
| 19 | Little, Quintin Company,Inc.,The | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 20 | Lobo Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 21 | Lode Holdings, LLC | Wichita Falls, TX 76301 | Oil Operator | Oct 2025 |
| 22 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 23 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 24 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 25 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Oct 2025 |
| 26 | LTS Oil & Gas | Lubbock, TX 79424 | Oil & Gas Operator | Oct 2025 |
| 27 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 28 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 29 | Lynx Petroleum Consultants Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2024 |
| 30 | LZB Energy, LLC | Austin, TX 78737 | Gas Operator | Jul 2020 |