| 1 | L & N Exploration Inc | | Oil & Gas Operator | Jul 2013 |
| 2 | Ladder Energy Company | Tulsa, OK 74120-4281 | Oil & Gas Operator | Jan 2018 |
| 3 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 4 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 5 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2024 |
| 6 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2024 |
| 7 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 8 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 9 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 10 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Jan 2024 |
| 11 | Lar-Mie Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1998 |
| 12 | Larkspur Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 13 | Larry Sherman Oil LLC | Chandler, OK 74834-0391 | Oil & Gas Operator | Jan 2024 |
| 14 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 15 | Laurel Operating Company, Inc. | Stillwater, OK 74074-3025 | Oil & Gas Operator | Jan 2024 |
| 16 | Lawrence James LLC | | Oil & Gas Operator | Feb 2024 |
| 17 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 18 | Leasehold Management Corp | Oklahoma City, OK 73109-6925 | Oil & Gas Operator | Jan 2024 |
| 19 | Leavell Resources Corporation | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 20 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Jan 2024 |
| 21 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2024 |
| 22 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 23 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 24 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Feb 2024 |
| 25 | Little River Energy Co. | Drumright, OK 74030 | Oil & Gas Operator | Jan 2024 |
| 26 | Little Thunder, LLC | | Oil Operator | Jan 2024 |
| 27 | Lobar Oil Co LLC | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Jan 2024 |
| 28 | Lord Enterprises Inc | Oklahoma City, OK 73106-5050 | Oil & Gas Operator | Sep 2000 |
| 29 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 30 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Feb 2024 |
| 31 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | Jan 2024 |
| 32 | Luther Oil Inc | Cameron Park, CA 95682-8865 | Oil & Gas Operator | Apr 2020 |
| 33 | LX4 LLC | | Oil Operator | Jan 2024 |