| 1 | L & R Energy Corporation | Spearman, TX 79081 | Oil & Gas Operator | Nov 2014 |
| 2 | L-R Production | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 3 | La Jolla Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Oct 2025 |
| 4 | La Mar, Paul W. | Nocona, TX 76255 | Oil & Gas Operator | May 1995 |
| 5 | Lamar Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2015 |
| 6 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 7 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 8 | Lankford, Dan L. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 9 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 10 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | Oct 2025 |
| 11 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 12 | Lewis, William T. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 13 | Lex And Lace Petroleum, LLC | Houston, TX 77269 | Oil Operator | Oct 2025 |
| 14 | Lindemann, James D. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 15 | Lindemann, W. L., DRLG. Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1994 |
| 16 | Lindemann, W.L., Oper. Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2006 |
| 17 | Lindley, J. R. | Richardson, TX 75081 | Oil & Gas Operator | Jun 2002 |
| 18 | Lindsay Oil Operations | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2010 |
| 19 | Lindsay, Dick | Graham, TX 76450 | Oil & Gas Operator | May 2015 |
| 20 | Little Drop Oil Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 21 | Little, Quintin Company,Inc.,The | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 22 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 23 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 24 | Livingston, David Oil Company | Haskell, TX 79521 | Oil & Gas Operator | Aug 2003 |
| 25 | Lonestar Production Services | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 26 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 27 | Lucky Oil & Gas | Malibu, CA 90265 | Oil & Gas Operator | Oct 2025 |
| 28 | Lunn, Will | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 1997 |
| 29 | Lyon Operating Company Inc.(Iii) | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |