| 1 | La Roca Energy, LP | Dallas, TX 75207 | Oil & Gas Operator | May 2024 |
| 2 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 3 | Lakewood Energy LLC | Dallas, TX 75214 | Oil & Gas Operator | Oct 2025 |
| 4 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 5 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 6 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Oct 2025 |
| 7 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 8 | Lbo Energy, Inc. | Kentfield, CA 94914 | Gas Operator | Nov 2002 |
| 9 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 10 | Lime Rock Resources IV-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 11 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 12 | Linop Corporation | Austin, TX 78728 | Oil & Gas Operator | Oct 2025 |
| 13 | Little, Quintin Company,Inc.,The | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 14 | LNH Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 2006 |
| 15 | Lobo Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 16 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Oct 2025 |
| 17 | Loeb, Herman L, LLC | Lawrenceville, IL 62439 | Oil Operator | Dec 2017 |
| 18 | Lone Star Services | Pecos, TX 79772 | Oil & Gas Operator | Oct 2025 |
| 19 | Lonestar Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 20 | Louisiana Minerals, LTD. | Houston, TX 77024 | Oil & Gas Operator | Jul 1988 |
| 21 | Luxe Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2021 |