| 1 | L & B Enterprise, LLC | Camden, AR 71701 | Oil Operator | Feb 2024 |
| 2 | L & G Petroleum Operating, LLC | Havana, KS 67347 | Oil Operator | Dec 2023 |
| 3 | L & L Energy Company | Huntington, AR 72940-0099 | Oil & Gas Operator | Nov 2023 |
| 4 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 5 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Nov 2019 |
| 6 | Lamkin Oil Company | Stephens, AR 71764 | Oil Operator | Dec 2023 |
| 7 | Lamkin Production Company, LLC | Stephens, AR 71764 | Oil Operator | Dec 2023 |
| 8 | Langley, James Operating Company, Inc | Smackover, AR 71762 | Oil & Gas Operator | Feb 2024 |
| 9 | Langley, Jerry Oil Company LLC | Smackover, AR 71762 | Oil Operator | Feb 2024 |
| 10 | Lanxess Corporation | El Dorado, AR 71730 | Oil & Gas Operator | Feb 2024 |
| 11 | Laray Oil, LLC | Louann, AR 71751 | Oil & Gas Operator | Feb 2024 |
| 12 | Lawco Exploration Inc | Bentonville, AR 72712 | Oil & Gas Operator | Feb 2024 |
| 13 | Lboc, LLC | Norphlet, AR 71759 | Oil Operator | Feb 2024 |
| 14 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 15 | Live Oak Energy, Inc | | Oil & Gas Operator | Aug 2021 |
| 16 | Longview Production Company | Dallas, TX 75243-3795 | Oil & Gas Operator | Feb 2024 |
| 17 | Lorentz Oil & Gas LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2023 |
| 18 | Lowery Oil Company, LLC | | Oil Operator | Dec 2009 |
| 19 | Lowery-Waller Oil Company | | Oil Operator | Dec 2009 |
| 20 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |
| 21 | Lyons & Prentiss | | Oil Operator | Feb 2024 |