| 1 | L.E. Jones Operating, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Feb 2026 |
| 2 | Lahoma Production Inc | Jenks, OK 74037 | Oil & Gas Operator | Feb 2026 |
| 3 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Apr 2026 |
| 4 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2026 |
| 5 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 6 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 7 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 8 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Jan 2026 |
| 9 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 10 | Larry Sherman Oil LLC | Chandler, OK 74834 | Oil & Gas Operator | Dec 2025 |
| 11 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 12 | Lawrence James Oil Prop Inc | Catoosa, OK 74015 | Oil & Gas Operator | Feb 2012 |
| 13 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 14 | Le Norman Partners LLC | Duncan, OK 73533-9523 | Oil & Gas Operator | Feb 2012 |
| 15 | Leasehold Management Corp | Oklahoma City, OK 73107 | Oil & Gas Operator | Nov 2024 |
| 16 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2026 |
| 17 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 18 | Little Chicago Oil & Gas Inc | Edmond, OK 73034-0809 | Oil & Gas Operator | Dec 2017 |
| 19 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Feb 2026 |
| 20 | Little Thunder, LLC | Bartlesville, OK 74003 | Oil Operator | Jan 2026 |
| 21 | Longbranch Oil Company | Oklahoma City, OK 73154-0735 | Oil & Gas Operator | Mar 2018 |
| 22 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Feb 2026 |
| 23 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | Jan 2026 |
| 24 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2026 |