| 1 | L & L Smith Energy Corporation | Muskogee, OK 74403-8479 | Oil & Gas Operator | Jan 2023 |
| 2 | Lamb Alan L | Oklahoma City, OK 73120-7824 | Oil & Gas Operator | Feb 2020 |
| 3 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 4 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2024 |
| 5 | Larkspur Operating LLC | Oklahoma City, OK 73034 | Oil & Gas Operator | Jan 2025 |
| 6 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | Feb 2025 |
| 7 | LCB Resources LLC | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Feb 2025 |
| 8 | Lear Petroleum Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2015 |
| 9 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2025 |
| 10 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Dec 2024 |
| 11 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 12 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 13 | Litzenberger Exploration | Waynoka, OK 73860 | Oil & Gas Operator | Jul 1996 |
| 14 | Litzenberger Exploration Inc | Waynoka, OK 73860 | Oil & Gas Operator | Feb 2025 |
| 15 | Lobo Exploration Company | Yukon, OK 73099 | Oil & Gas Operator | Jan 2025 |
| 16 | Locin Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 17 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 18 | LX4 LLC | Gage, OK 73843 | Oil Operator | Dec 2024 |
| 19 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |