| 1 | L & L Resources, Inc. | Hays, KS 67601 | Oil Operator | Mar 1986 |
| 2 | La VIda Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1993 |
| 3 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 4 | Large Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Mar 2025 |
| 5 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Mar 2025 |
| 6 | Last Mile Production, LLC | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 7 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 8 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 9 | Lawson Petroleum Co. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2009 |
| 10 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Mar 2025 |
| 11 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 12 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 13 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 14 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 15 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 16 | LNH Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 2006 |
| 17 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 18 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 19 | Longhorn Service & Drilling Co. | Kermit, TX 79745 | Oil & Gas Operator | Jun 2019 |
| 20 | Losure Pet. Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2014 |
| 21 | Losure, Ken | Borger, TX 79008 | Oil & Gas Operator | Mar 2025 |
| 22 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 23 | Lynx Oil Co., Inc. | Denton, TX 76207 | Oil & Gas Operator | Sep 2003 |
| 24 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2025 |
| 25 | Lynx Petroleum Consultants Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2024 |
| 26 | LZB Energy, LLC | Austin, TX 78737 | Gas Operator | Jul 2020 |
| 27 | LZS Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2007 |