| 1 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 2 | Ladder Energy Company | Tulsa, OK 74120-4281 | Oil & Gas Operator | Jan 2018 |
| 3 | Lagoon Water Logistics LLC | | Oil Operator | Feb 2023 |
| 4 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | May 2024 |
| 5 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 6 | Lake Country Disposal LLC | | Oil Operator | Feb 2024 |
| 7 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | May 2024 |
| 8 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Feb 2024 |
| 9 | Lammerts Robert P | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2002 |
| 10 | Lancer Energy Corporation | Oklahoma City, OK 73132-5903 | Oil & Gas Operator | May 2015 |
| 11 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 12 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 13 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 14 | Larkspur Operating LLC | | Oil & Gas Operator | Mar 2024 |
| 15 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 16 | Latigo Oil And Gas Inc | Woodward, OK 73802-1208 | Oil & Gas Operator | Mar 2024 |
| 17 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | May 2024 |
| 18 | LCB Resources LLC | | Oil & Gas Operator | Mar 2024 |
| 19 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 20 | Leeman Don J | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 1998 |
| 21 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Feb 2024 |
| 22 | Legacy Energy Services LLC | | Oil & Gas Operator | Feb 2024 |
| 23 | Legacy Reserves Operating LP | Denver, CO 80202 | Oil & Gas Operator | May 2024 |
| 24 | Lewbet Inc | Perry, OK 73077-8914 | Oil & Gas Operator | Feb 2024 |
| 25 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 26 | Limestone Exploration II, LLC | Midland, TX 79704 | Oil & Gas Operator | Jun 2019 |
| 27 | Limestone Productions | Bartlesville, OK 74006-8229 | Oil & Gas Operator | Sep 2013 |
| 28 | Lincoln Ventures LLC | | Oil & Gas Operator | Feb 2024 |
| 29 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Feb 2024 |
| 30 | Little Bear Resources LLC | Stillwater, OK 74074-1388 | Oil & Gas Operator | Feb 2013 |
| 31 | Little River Energy Co. | Drumright, OK 74030 | Oil & Gas Operator | Feb 2024 |
| 32 | Littrell Chemical Inc | Cleo Springs, OK 73729 | Oil & Gas Operator | Jan 2005 |
| 33 | Litzenberger Exploration Inc | Waynoka, OK 73860-0217 | Oil & Gas Operator | Mar 2024 |
| 34 | Longacre Oil & Gas | Enid, OK 73702 | Oil & Gas Operator | Mar 2013 |
| 35 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | May 2024 |
| 36 | Lorentz Oil & Gas LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2024 |
| 37 | Louis Dreyfus Gas Marketing | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2018 |
| 38 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Mar 2024 |
| 39 | LX4 LLC | | Oil Operator | Jan 2024 |