| 1 | Ladd Oil & Gas Corporation | Midland, TX 79711 | Oil & Gas Operator | Dec 2021 |
| 2 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 3 | Laredo Petroleum - Dallas, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2014 |
| 4 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 5 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Oct 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 | Oct 2025 |
| 9 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 10 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 11 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 12 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 13 | Linco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Oct 2025 |
| 14 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 15 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 16 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 17 | Lipan Flats Production, L.L.C. | San Angelo, TX 76905 | Oil Operator | Oct 2025 |
| 18 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 19 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |