| 1 | L & L Producers | Independnce, KS 67301 | Oil Operator | Feb 2025 |
| 2 | L B G Operating Co | Fairfax, OK 74037 | Oil & Gas Operator | Oct 2014 |
| 3 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Feb 2025 |
| 4 | Laml Compaines LLC | Cleveland, OK 74020 | Oil Operator | Feb 2025 |
| 5 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Mar 2025 |
| 6 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | Mar 2025 |
| 7 | Laverty, Thomas R | | Oil & Gas Operator | Dec 2023 |
| 8 | Lawco Exploration Inc | Bentonville, AR 72712 | Oil & Gas Operator | Aug 2024 |
| 9 | Lawco Holdings LLC | Bentonville, AR 72712 | Oil Operator | Feb 2025 |
| 10 | Lawrence Roy Drilling Co Inc | Pawnee, OK 74058-0306 | Oil & Gas Operator | Aug 2000 |
| 11 | Lawson George E | Sand Springs, OK 74063 | Oil & Gas Operator | May 2013 |
| 12 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 13 | Leg Up Operating Company LLC | Tulsa, OK 74135 | Oil Operator | Feb 2025 |
| 14 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2023 |
| 15 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Feb 2025 |
| 16 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | Feb 2025 |
| 17 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Feb 2025 |
| 18 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2025 |
| 19 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 20 | Lightner Harry A | | Oil & Gas Operator | May 2013 |
| 21 | Lil-Mor Oil Company | Tulsa, OK 74105 | Oil Operator | Dec 2000 |
| 22 | Lincoln Ventures LLC | Inola, OK 74036-5035 | Oil & Gas Operator | Feb 2025 |
| 23 | Link Oil Company (The) | Tulsa, OK 74103-4113 | Oil & Gas Operator | Jan 2014 |
| 24 | Little Bear Oil & Gas Co LTD | Boca Rotan, FL 33431 | Oil & Gas Operator | Jan 1997 |
| 25 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Feb 2025 |
| 26 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Mar 2025 |
| 27 | Locke Stock & Barrel Res Inc | Calgary, AB T2P3G | Oil Operator | Nov 1998 |
| 28 | Long, John P | | Oil & Gas Operator | Feb 2025 |
| 29 | Lowery Roger | Duncan, OK 73534-0040 | Oil & Gas Operator | Sep 2012 |
| 30 | Lynan Energy Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |
| 31 | Lynn William R | Pawhuska, OK 74056 | Oil & Gas Operator | May 2013 |