| 1 | L & B Oil Company Inc | Houston, TX 77019-3115 | Oil & Gas Operator | Dec 2023 |
| 2 | Lackey WM Oil & Gas Oper Co | Shawnee, OK 74801 | Oil & Gas Operator | Jan 1994 |
| 3 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 4 | Ladder Energy Company | Tulsa, OK 74120-4281 | Oil & Gas Operator | Jan 2018 |
| 5 | Laird Anita Louise | Asher, OK 74826-3215 | Oil Operator | Jun 2018 |
| 6 | Laird Bill Oil Company | St Louis, OK 74866-0120 | Oil & Gas Operator | Jan 2024 |
| 7 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 8 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 9 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Dec 2023 |
| 10 | Landmark Energy LLC | Seminole, OK 74818-1672 | Oil & Gas Operator | Jan 2024 |
| 11 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Sep 2023 |
| 12 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2024 |
| 13 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 14 | Lasmo Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2011 |
| 15 | Leasehold Management Corp | Oklahoma City, OK 73109-6925 | Oil & Gas Operator | Dec 2023 |
| 16 | Leavell Resources Corporation | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 17 | Lee Energy LLC | Edmond, OK 73034-7668 | Oil Operator | Jan 2005 |
| 18 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 19 | Lema Petroleum Inc | Holdenville, OK 74848-0957 | Oil & Gas Operator | Dec 2023 |
| 20 | Lewis A Hembree Production Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Dec 2023 |
| 21 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Mar 2022 |
| 22 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 23 | Lillard Pipe & Supply Inc | Shawnee, OK 74802-0847 | Oil & Gas Operator | Nov 2014 |
| 24 | Lion Petroleum Company | Oklahoma City, OK 73120-4503 | Oil & Gas Operator | Aug 2015 |
| 25 | Little River Energy Co. | Drumright, OK 74030 | Oil & Gas Operator | Jan 2024 |
| 26 | Lobar Oil Co LLC | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Dec 2023 |
| 27 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 28 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Jan 2024 |
| 29 | LX4 LLC | | Oil Operator | Jan 2024 |