| 1 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 2 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Dec 2024 |
| 3 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2024 |
| 4 | Larkspur Operating LLC | Oklahoma City, OK 73034 | Oil & Gas Operator | Jan 2025 |
| 5 | Latigo Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Mar 2025 |
| 6 | LCB Resources LLC | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Jan 2025 |
| 7 | Lear Petroleum Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2015 |
| 8 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 9 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 10 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 11 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 12 | Lobar Oil Co LLC | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Dec 2024 |
| 13 | Locators Oil And Gas Inc | Guthrie, OK 73044 | Oil & Gas Operator | Oct 2022 |
| 14 | Lodestone Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2025 |
| 15 | Longview Production Company | Dallas, TX 75243-3795 | Oil & Gas Operator | Dec 2024 |
| 16 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | Dec 2024 |
| 17 | Louis Dreyfus Gas Marketing | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2018 |
| 18 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 19 | LX4 LLC | Gage, OK 73843 | Oil Operator | Nov 2024 |