| 1 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 2 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 3 | Lammerts Robert P | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2002 |
| 4 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 5 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 6 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2023 |
| 7 | Lee Energy Exploration LTD | Oklahoma City, OK 73102-7114 | Oil & Gas Operator | Jul 2008 |
| 8 | Lefco Resources LLC | Henryetta, OK 74437-0811 | Gas Operator | Jan 2024 |
| 9 | Lewis A Hembree Production Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Jan 2024 |
| 10 | Lewis Oil Operations LLC | Ratliff City, OK 73481-0220 | Oil & Gas Operator | Feb 2024 |
| 11 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 12 | Longberry Energy Inc | | Gas Operator | Jan 2024 |
| 13 | Louis Dreyfus Gas Marketing | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2018 |
| 14 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 15 | LX4 LLC | | Oil Operator | Jan 2024 |
| 16 | LXS Inc | Stigler, OK 74462-0506 | Gas Operator | Nov 2013 |
| 17 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |