| 1 | L & T Disposal LLC | Wilson, OK 73463-6545 | Oil Operator | Mar 2016 |
| 2 | Lahoma Production Inc | Jenks, OK 74037 | Oil & Gas Operator | Apr 2025 |
| 3 | Lakeland Pipeline Inc | Hominy, OK 74035-1006 | Oil & Gas Operator | Jun 2023 |
| 4 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Jun 2025 |
| 5 | Lamberton W J | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2015 |
| 6 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Jul 2025 |
| 7 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 8 | Lariat Energy & Supply Co Inc | Hulbert, OK 74441 | Oil & Gas Operator | Jun 2025 |
| 9 | Lawrence James Oil Prop Inc | Catoosa, OK 74015 | Oil & Gas Operator | Feb 2012 |
| 10 | Ldo LLC | Skiatook, OK 74070 | Oil Operator | Jun 2025 |
| 11 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 12 | Leg Up Operating Company LLC | Tulsa, OK 74135 | Oil Operator | Jul 2025 |
| 13 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | Jun 2025 |
| 14 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 15 | Lewis Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 1995 |
| 16 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Dec 2024 |
| 17 | Loving Company (The) | Broken Arrow, OK 74014-0001 | Oil & Gas Operator | May 2013 |
| 18 | Lowe Kenneth | Jennings, OK 74038 | Oil & Gas Operator | May 2025 |
| 19 | Luther Oil Inc | Cameron Park, CA 95682-8865 | Oil & Gas Operator | Apr 2020 |