| 1 | L & L Smith Energy Corporation | | Oil & Gas Operator | Jan 2023 |
| 2 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 3 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 4 | Lamb Alan L | Oklahoma City, OK 73120-7824 | Oil & Gas Operator | Feb 2020 |
| 5 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 6 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2023 |
| 7 | Larkspur Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 8 | Latigo Oil And Gas Inc | Woodward, OK 73802-1208 | Oil & Gas Operator | Feb 2024 |
| 9 | LCB Resources LLC | | Oil & Gas Operator | Feb 2024 |
| 10 | Lear Petroleum Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2015 |
| 11 | Lewis A Hembree Production Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Jan 2024 |
| 12 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Mar 2022 |
| 13 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 14 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 15 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 16 | Litzenberger Exploration | Waynoka, OK 73860 | Oil & Gas Operator | Jul 1996 |
| 17 | Litzenberger Exploration Inc | Waynoka, OK 73860-0217 | Oil & Gas Operator | Feb 2024 |
| 18 | Lobo Exploration Company | Yukon, OK 73099 | Oil & Gas Operator | Jan 2024 |
| 19 | Locin Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 20 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2024 |
| 21 | LX4 LLC | | Oil Operator | Jan 2024 |
| 22 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |