| 1 | L & L Producers | Independence, KS 67301 | Oil Operator | Jan 2024 |
| 2 | L B G Operating Co | Fairfax, OK 74037 | Oil & Gas Operator | Oct 2014 |
| 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 | Laml Compaines LLC | Cleveland, OK 74020 | Oil Operator | Jan 2024 |
| 7 | Latigo Oil And Gas Inc | Woodward, OK 73802-1208 | Oil & Gas Operator | Feb 2024 |
| 8 | Laverty, Thomas R | | Oil & Gas Operator | Dec 2023 |
| 9 | Lawco Exploration Inc | Bentonville, AR 72712 | Oil & Gas Operator | Feb 2024 |
| 10 | Lawco Holdings LLC | Bentonville, AR 72712 | Oil Operator | Jan 2024 |
| 11 | Lawrence Roy Drilling Co Inc | Pawnee, OK 74058-0306 | Oil & Gas Operator | Aug 2000 |
| 12 | Lawson George E | Sand Springs, OK 74063 | Oil & Gas Operator | May 2013 |
| 13 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 14 | Leg Up Operating Company LLC | | Oil Operator | Jan 2024 |
| 15 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2023 |
| 16 | Lester Joan | Sand Springs, OK 74063-0430 | Oil & Gas Operator | Jan 2024 |
| 17 | Lewis A Hembree Production Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Jan 2024 |
| 18 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Jan 2024 |
| 19 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2024 |
| 20 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 21 | Lightner Harry A | Cleveland, OK 74020 | Oil & Gas Operator | May 2013 |
| 22 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 23 | Lil-Mor Oil Company | Tulsa, OK 74105 | Oil Operator | Dec 2000 |
| 24 | Lincoln Ventures LLC | | Oil & Gas Operator | Jan 2024 |
| 25 | Link Oil Company (The) | Tulsa, OK 74103-4113 | Oil & Gas Operator | Jan 2014 |
| 26 | Little Bear Oil & Gas Co LTD | Boca Rotan, FL 33431 | Oil & Gas Operator | Jan 1997 |
| 27 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Jan 2024 |
| 28 | Little River Energy Co. | Drumright, OK 74030 | Oil & Gas Operator | Jan 2024 |
| 29 | Locke Stock & Barrel Res Inc | Calgary, AB T2P3G | Oil Operator | Nov 1998 |
| 30 | Long John P Jr | Pawhuska, OK 74056 | Oil & Gas Operator | Jan 2024 |
| 31 | Long SR John | Avant, OK 74001 | Oil Operator | Jan 2024 |
| 32 | Longacre-Moore Oil Co | | Oil & Gas Operator | Jun 1996 |
| 33 | Lonnie Ware | Wynona, OK 74084 | Oil & Gas Operator | Jan 2024 |
| 34 | Louis Dreyfus Gas Marketing | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2018 |
| 35 | LX4 LLC | | Oil Operator | Jan 2024 |
| 36 | Lynan Energy Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |
| 37 | Lynn William R | Pawhuska, OK 74056 | Oil & Gas Operator | May 2013 |