| 1 | Laird Bill Oil Company | St Louis, OK 74866 | Oil & Gas Operator | Jan 2025 |
| 2 | Lambert Company LLC | Healdton, OK 73438-0962 | Oil & Gas Operator | Jan 2025 |
| 3 | Lambert Oil & Gas LLC | Holdenville, OK 74848-4707 | Oil & Gas Operator | Nov 2024 |
| 4 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2025 |
| 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 Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Jan 2025 |
| 8 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 9 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 10 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2025 |
| 11 | Larkin Energy Company Inc | Sasakwa, OK 74867 | Oil & Gas Operator | May 2022 |
| 12 | Latigo Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 13 | Laurel Operating Company, Inc. | Stillwater, OK 74074-3025 | Oil & Gas Operator | Jan 2025 |
| 14 | Lavrco Energie Inc | Duncan, OK 73533 | Oil & Gas Operator | Oct 2024 |
| 15 | Lee Energy Exploration LTD | Oklahoma City, OK 73102-7114 | Oil & Gas Operator | Jul 2008 |
| 16 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 17 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Dec 2024 |
| 18 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 19 | Little O Oil Company | Velma, OK 73091-0425 | Oil & Gas Operator | Apr 2015 |
| 20 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Feb 2025 |
| 21 | Lobar Oil Co LLC | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Jan 2025 |
| 22 | Loftis Bobby Lee Rev Trust | Holdenville, OK 74848 | Oil & Gas Operator | Jun 2022 |
| 23 | Logan Productions LLC | Wewoka, OK 74884 | Oil Operator | Dec 2024 |
| 24 | Long Royalty Company | Yukon, OK 73085 | Oil & Gas Operator | Jan 2004 |
| 25 | Longberry Energy Inc | Keota, OK 74941 | Gas Operator | Jan 2025 |
| 26 | Lou Dennis Oil Company Inc | Ada, OK 74820-2303 | Oil & Gas Operator | Jun 2016 |
| 27 | Louis Dreyfus Gas Marketing | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2018 |
| 28 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 29 | Lubell Oil Company | Tulsa, OK 74103 | Gas Operator | Jul 1993 |
| 30 | Lucky Ace Petroleum LLC | Carrollton, TX 75010-4232 | Oil Operator | Oct 2021 |
| 31 | Lucky Four Oil & Gas Company | Sasakwa, OK 74867 | Oil & Gas Operator | Feb 2025 |
| 32 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | Jan 2025 |
| 33 | Lyda Gerald SR X Bar Ranch | San Antonio, TX 78268-0907 | Oil & Gas Operator | Feb 1994 |
| 34 | Lynan Energy Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |