| 1 | L & D, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 2 | L & M Operating, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jun 2025 |
| 3 | L & R Energy Corporation | Spearman, TX 79081 | Oil & Gas Operator | Nov 2014 |
| 4 | Lackey, William H. Oil And Gas | Shawnee, OK 74804 | Oil & Gas Operator | Feb 2024 |
| 5 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 6 | Lamb, James L., Jr. | Austin, TX 78750 | Oil & Gas Operator | Mar 2016 |
| 7 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 8 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 9 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Jun 2025 |
| 10 | Lariat Resources, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | May 2022 |
| 11 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Jun 2025 |
| 12 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 13 | Las Animas Production Company | Midland, TX 79705 | Oil & Gas Operator | Mar 1995 |
| 14 | Last Dollar LLC | Big Lake, TX 76932 | Oil & Gas Operator | Jun 2025 |
| 15 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 16 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | Apr 2025 |
| 17 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 18 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 19 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Jun 2025 |
| 20 | LDF Energy, LLC | Midland, TX 79707 | Oil & Gas Operator | Jun 2025 |
| 21 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2025 |
| 22 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 23 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Jun 2025 |
| 24 | Lewis, T. K. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2025 |
| 25 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 26 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 27 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 28 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 29 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Jun 2025 |
| 30 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 31 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Jun 2025 |
| 32 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 33 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 34 | LT Oil Company | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 35 | LTS Oil & Gas | Lubbock, TX 79424 | Oil & Gas Operator | Jun 2025 |
| 36 | LTS Oil & Gas A | Lubbock, TX 79424 | Oil & Gas Operator | Jun 2025 |