| 1 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 2 | La VIda Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1993 |
| 3 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 4 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 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 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 8 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 9 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 10 | Lawson Petroleum Co. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2009 |
| 11 | LCX Energy, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2010 |
| 12 | Leeper Oil Exp. & Prod. Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2005 |
| 13 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 14 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 15 | Lewis, James B. Land & Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Nov 1998 |
| 16 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 17 | Limestone Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2011 |
| 18 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 19 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 20 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 21 | Lothian Oil Texas I, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 22 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 23 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 24 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |