| 1 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 2 | Lagoon Water Logistics LLC | Oklahoma City, OK 73103 | Oil Operator | Jul 2024 |
| 3 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 4 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 5 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 6 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 7 | Laran Operating LLC | Dover, OK 73734-0057 | Oil & Gas Operator | Mar 2015 |
| 8 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2024 |
| 9 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 10 | Latigo Oil & Gas, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Jul 2025 |
| 11 | Latigo Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 12 | LCB Resources LLC | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Jul 2025 |
| 13 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 14 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 15 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 16 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 17 | Lincoln Rock Corporation | Northfield, IL 60093 | Oil & Gas Operator | Jul 2003 |
| 18 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 19 | Lobo Exploration Company | Yukon, OK 73099 | Oil & Gas Operator | Jun 2025 |
| 20 | Locators Oil And Gas Inc | Guthrie, OK 73044 | Oil & Gas Operator | Oct 2022 |
| 21 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Oct 2025 |
| 22 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | Jun 2025 |
| 23 | LTJ Enterprises LLC | Lone Grove, OK 73443 | Oil & Gas Operator | May 2025 |
| 24 | LVM Oil Production LLC | Yale, OK 74085-6688 | Oil & Gas Operator | Jul 2021 |
| 25 | LX4, LLC | Laverne, OK 73848 | Oil Operator | Jul 2025 |
| 26 | Lyon Energy, Inc. | Plano, TX 75075 | Oil & Gas Operator | Feb 2000 |