| 6001 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Apr 2024 |
| 6002 | Lake Crystal Operating LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Apr 2024 |
| 6003 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Nov 2019 |
| 6004 | Lakehills Production, Inc. | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 6005 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Apr 2024 |
| 6006 | Lakewood Energy LLC | Dallas, TX 75214 | Oil & Gas Operator | Apr 2024 |
| 6007 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 6008 | Lakota Energy, LTD. | Paradise, TX 76073 | Oil & Gas Operator | Apr 2024 |
| 6009 | Laloc | Aspermont, TX 79502 | Oil & Gas Operator | Apr 2024 |
| 6010 | Lama Energy, L.L.C. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 6011 | Lamar Energy | Nocona, TX 76255 | Oil Operator | Apr 2024 |
| 6012 | Lamar Oil & Gas, Inc. | Rockport, TX 78381 | Oil & Gas Operator | Apr 2024 |
| 6013 | Lamar Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2015 |
| 6014 | Lamay Corporation | Rosenberg, TX 77471 | Oil & Gas Operator | Apr 2024 |
| 6015 | Lamb & Mize | Azle, TX 76020 | Oil & Gas Operator | Apr 2024 |
| 6016 | Lamb, James L., Jr. | Austin, TX 78750 | Oil & Gas Operator | Mar 2016 |
| 6017 | Lambeck Petroleum, LLC | Stockdale, TX 78160 | Oil Operator | Apr 2024 |
| 6018 | Lamco Oil, LLC | Nocona, TX 76255 | Oil & Gas Operator | Apr 2024 |
| 6019 | Lampert Exploration Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 6020 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Apr 2024 |
| 6021 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | Apr 2024 |
| 6022 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 6023 | Lanco Oil & Gas, Inc. | Richland, TX 76681 | Oil & Gas Operator | Jan 1998 |
| 6024 | Land, Cleatus H. Estate | Seguin, TX 78155 | Oil & Gas Operator | Mar 2001 |
| 6025 | Landmark Drilling, L.L.C. | Waskom, TX 75692 | Oil Operator | Apr 2024 |
| 6026 | Landmark Exploration Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2024 |
| 6027 | Landmark Ip, LLC | Houston, TX 77055 | Oil & Gas Operator | Apr 2024 |
| 6028 | Landmark Production Company | MC Gregor, TX 76657 | Oil & Gas Operator | Oct 2010 |
| 6029 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2024 |
| 6030 | Landmen Of Texas | Hondo, TX 78861 | Oil Operator | Feb 2007 |
| 6031 | Landmen Of Texas, Inc. | Hondo, TX 78861 | Oil Operator | Dec 2016 |
| 6032 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | Apr 2024 |
| 6033 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 6034 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 6035 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 6036 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 6037 | Landrum, W. A. | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 6038 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 6039 | Lane, Lloyd L. | Buffalo, TX 75831 | Oil Operator | Apr 2024 |
| 6040 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 6041 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Apr 2024 |
| 6042 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | Apr 2024 |
| 6043 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 6044 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 6045 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 6046 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 6047 | Lankford, Dan L. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 6048 | Lapco Oil & Gas Company | Houston, TX 77069 | Oil & Gas Operator | Oct 2015 |
| 6049 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Sep 2023 |
| 6050 | Lapis Operating, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jul 2015 |
| 6051 | Laquey, E. C. | Refugio, TX 78377 | Oil & Gas Operator | Aug 2003 |
| 6052 | Larae Operations | Luling, TX 78648 | Oil Operator | Apr 2024 |
| 6053 | Larance Engineering Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 1996 |
| 6054 | Laredo Energy | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 6055 | Laredo Energy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2022 |
| 6056 | Laredo Energy, LP | Houston, TX 77040 | Oil & Gas Operator | Oct 2003 |
| 6057 | Laredo Petroleum - Dallas, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2014 |
| 6058 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 6059 | Large Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2024 |
| 6060 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 6061 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 6062 | Lariat Resources, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | May 2022 |
| 6063 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2024 |
| 6064 | Larison Oil Company | Katy, TX 77494 | Oil & Gas Operator | Apr 2024 |
| 6065 | Laroca Resources, LTD | Austin, TX 78709 | Oil & Gas Operator | Apr 2024 |
| 6066 | Laroco LLP | Woodsboro, TX 78393 | Oil & Gas Operator | Mar 2008 |
| 6067 | Laron Oil Corporation | Seguin, TX 78155 | Oil & Gas Operator | Jul 1997 |
| 6068 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 6069 | Larry Oil, Inc. | Albany, TX 76430 | Oil & Gas Operator | Nov 2001 |
| 6070 | Larson, Perry L Operating Co Inc | Dallas, TX 75382 | Oil & Gas Operator | Feb 2021 |
| 6071 | Las Animas Production Company | Midland, TX 79705 | Oil & Gas Operator | Mar 1995 |
| 6072 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 6073 | Lasalle Marine Corporation | Houston, TX 77056 | Oil Operator | Aug 2003 |
| 6074 | Lasater & Co, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2024 |
| 6075 | Last Chance Operating LLC | Wortham, TX 76693 | Oil Operator | Apr 2024 |
| 6076 | Last Dollar LLC | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2024 |
| 6077 | Last Run, LLC | Rillito, AZ 85246 | Oil & Gas Operator | May 2020 |
| 6078 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 6079 | Latexo Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Feb 1997 |
| 6080 | Latigo (Texas), LLC | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2024 |
| 6081 | Latigo Oil And Gas Inc | Woodward, OK 73802-1208 | Oil & Gas Operator | Jan 2024 |
| 6082 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 6083 | Latigo Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2023 |
| 6084 | Latigo Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 6085 | Latimer, D. Gail Enterprises,Inc | Snyder, TX 79550 | Oil & Gas Operator | Jul 2004 |
| 6086 | Laughlin, W. M. Estate | Premont, TX 78375 | Oil & Gas Operator | Jun 2003 |
| 6087 | Laurel Fuel Company | Jackson, MS 39206 | Oil & Gas Operator | Dec 1996 |
| 6088 | Lavaca Canyon Petroleum LLC | Houston, TX 77094 | Oil & Gas Operator | Apr 2024 |
| 6089 | Lavaca River Operating Co., LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Apr 2024 |
| 6090 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 6091 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 6092 | Lawbar Petroleum, Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Aug 2003 |
| 6093 | Lawco Osage Operating, LLC | Bentonville, AR 72712 | Oil & Gas Operator | Apr 2024 |
| 6094 | Lawlis Oil Company | Hamlin, TX 79520 | Oil & Gas Operator | Apr 2024 |
| 6095 | Lawrence Energy Company | Abilene, TX 79602 | Oil & Gas Operator | Apr 2024 |
| 6096 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Apr 2024 |
| 6097 | Lawson Petroleum Co. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2009 |
| 6098 | Lawton, Jack Inc. | Sulphur, LA 70663 | Oil & Gas Operator | Dec 1995 |
| 6099 | Lay, J. D. | Lockhart, TX 78644 | Oil & Gas Operator | May 1997 |
| 6100 | Lay, Warren Leon | Lockhart, TX 78644 | Oil & Gas Operator | Aug 2023 |