| 6101 | La Sara Operating Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 6102 | La Vernia Oil | La Vernia, TX 78121 | Oil Operator | Apr 2026 |
| 6103 | La Vernia Oil Co. | La Vernia, TX 78121 | Oil & Gas Operator | Aug 2003 |
| 6104 | La VIda Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1993 |
| 6105 | Lace Operating | River Oaks, TX 76114 | Oil & Gas Operator | Jun 1997 |
| 6106 | Lackey, William H. Oil And Gas | Shawnee, OK 74804 | Oil & Gas Operator | Feb 2024 |
| 6107 | Lacy 03, LLC | Gonzales, TX 78629 | Oil & Gas Operator | Apr 2026 |
| 6108 | Lacy Operations, LTD. | Longview, TX 75606 | Oil & Gas Operator | Oct 2012 |
| 6109 | Lacy, F. B. Inc. | Houston, TX 77055 | Oil & Gas Operator | Sep 1997 |
| 6110 | Lacy, J. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2007 |
| 6111 | Lacy, R., Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2002 |
| 6112 | Ladd Oil & Gas Corporation | Midland, TX 79711 | Oil & Gas Operator | Dec 2021 |
| 6113 | Ladd Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2008 |
| 6114 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 6115 | Laddex, LTD. | Amarillo, TX 79102 | Oil & Gas Operator | Feb 2025 |
| 6116 | Lafonda Energy LLC | Vernon, TX 76384 | Oil Operator | Apr 2026 |
| 6117 | Lagarto Company, The | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 1995 |
| 6118 | Lagerquist, Walter G., Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2005 |
| 6119 | Laguna Oil & Gas Corp. | Weesatche, TX 77993 | Oil & Gas Operator | Apr 2026 |
| 6120 | Laguna Petroleum Company | Casper, WY 82601 | Oil & Gas Operator | Dec 1982 |
| 6121 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 6122 | Laguna Texas Resources, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 6123 | Lainco Well Service | Hamlin, TX 79520 | Oil & Gas Operator | Dec 1996 |
| 6124 | Lainco Well Service, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Aug 2011 |
| 6125 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Apr 2026 |
| 6126 | Lake Crystal Operating LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Apr 2026 |
| 6127 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Jul 2017 |
| 6128 | Lakehills Production, Inc. | Austin, TX 78701 | Oil & Gas Operator | Apr 2026 |
| 6129 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Apr 2026 |
| 6130 | Lakewood Energy LLC | Dallas, TX 75214 | Oil & Gas Operator | Apr 2026 |
| 6131 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 6132 | Lakota Energy, LTD. | Paradise, TX 76073 | Oil & Gas Operator | Apr 2026 |
| 6133 | Laloc | Aspermont, TX 79502 | Oil & Gas Operator | Sep 2025 |
| 6134 | Lama Energy, L.L.C. | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 6135 | Lamar Energy | Nocona, TX 76255 | Oil Operator | Apr 2026 |
| 6136 | Lamar Oil & Gas, Inc. | Corpus Christ, TX 78413 | Oil & Gas Operator | Apr 2026 |
| 6137 | Lamar Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2015 |
| 6138 | Lamay Corporation | Rosenberg, TX 77471 | Oil & Gas Operator | Apr 2026 |
| 6139 | Lamb & Mize | Azle, TX 76020 | Oil & Gas Operator | Apr 2026 |
| 6140 | Lamb, James L., Jr. | Austin, TX 78750 | Oil & Gas Operator | Mar 2016 |
| 6141 | Lambeck Petroleum, LLC | Stockdale, TX 78160 | Oil Operator | Apr 2026 |
| 6142 | Lamco Oil, LLC | Nocona, TX 76255 | Oil & Gas Operator | Apr 2026 |
| 6143 | Lampert Exploration Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 6144 | Lance Exploration Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1994 |
| 6145 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Apr 2026 |
| 6146 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | Apr 2026 |
| 6147 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 6148 | Lanco Oil & Gas, Inc. | Richland, TX 76681 | Oil & Gas Operator | Jan 1998 |
| 6149 | Land, Cleatus H. Estate | Seguin, TX 78155 | Oil & Gas Operator | Mar 2001 |
| 6150 | Landmark Drilling, L.L.C. | Waskom, TX 75692 | Oil Operator | Apr 2026 |
| 6151 | Landmark Exploration Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2026 |
| 6152 | Landmark Ip, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 6153 | Landmark Production Company | MC Gregor, TX 76657 | Oil & Gas Operator | Oct 2010 |
| 6154 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2026 |
| 6155 | Landmen Of Texas | Hondo, TX 78861 | Oil Operator | Feb 2007 |
| 6156 | Landmen Of Texas, Inc. | Hondo, TX 78861 | Oil Operator | Dec 2016 |
| 6157 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | Apr 2026 |
| 6158 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 6159 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 6160 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 6161 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 6162 | Landrum, W. A. | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 6163 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2026 |
| 6164 | Lane, Lloyd L. | Buffalo, TX 75831 | Oil Operator | Apr 2026 |
| 6165 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 6166 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Apr 2026 |
| 6167 | Langford & Brigham Operating LLC | Austin, TX 78730 | Oil & Gas Operator | Apr 2026 |
| 6168 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | Apr 2026 |
| 6169 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 6170 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 6171 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 6172 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 6173 | Lankford, Dan L. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 6174 | Lapco Oil & Gas Company | Houston, TX 77069 | Oil & Gas Operator | Oct 2015 |
| 6175 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 6176 | Lapis Operating, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jul 2015 |
| 6177 | Laquey, E. C. | Refugio, TX 78377 | Oil & Gas Operator | Aug 2003 |
| 6178 | Larae Operations | Luling, TX 78648 | Oil Operator | Apr 2026 |
| 6179 | Larance Engineering Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 1996 |
| 6180 | Laredo Energy | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 6181 | Laredo Energy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2022 |
| 6182 | Laredo Energy, LP | Houston, TX 77040 | Oil & Gas Operator | Oct 2003 |
| 6183 | Laredo Petroleum - Dallas, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2014 |
| 6184 | Laredo Petroleum Inc | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 6185 | Large Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2026 |
| 6186 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Apr 2026 |
| 6187 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 6188 | Lariat Resources, LLC | Fort Worth, TX 76132 | Oil & Gas Operator | May 2022 |
| 6189 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |
| 6190 | Larison Oil Company | Katy, TX 77494 | Oil & Gas Operator | Apr 2026 |
| 6191 | Laroca Resources, LTD | Austin, TX 78709 | Oil & Gas Operator | Apr 2026 |
| 6192 | Laroco LLP | Woodsboro, TX 78393 | Oil & Gas Operator | Mar 2008 |
| 6193 | Laron Oil Corporation | Seguin, TX 78155 | Oil & Gas Operator | Jul 1997 |
| 6194 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 6195 | Larry Oil, Inc. | Albany, TX 76430 | Oil & Gas Operator | Nov 2001 |
| 6196 | Larson, Perry L Operating Co Inc | Dallas, TX 75382 | Oil & Gas Operator | Feb 2021 |
| 6197 | Las Animas Production Company | Midland, TX 79705 | Oil & Gas Operator | Mar 1995 |
| 6198 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 6199 | Lasalle Marine Corporation | Houston, TX 77056 | Oil Operator | Aug 2003 |
| 6200 | Lasater & Co, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2026 |