| 6201 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 6202 | Large Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Oct 2025 |
| 6203 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |
| 6204 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 6205 | Lariat Resources, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | May 2022 |
| 6206 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Oct 2025 |
| 6207 | Larison Oil Company | Katy, TX 77494 | Oil & Gas Operator | Oct 2025 |
| 6208 | Laroca Resources, LTD | Austin, TX 78709 | Oil & Gas Operator | Oct 2025 |
| 6209 | Laroco LLP | Woodsboro, TX 78393 | Oil & Gas Operator | Mar 2008 |
| 6210 | Laron Oil Corporation | Seguin, TX 78155 | Oil & Gas Operator | Jul 1997 |
| 6211 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 6212 | Larry Oil, Inc. | Albany, TX 76430 | Oil & Gas Operator | Nov 2001 |
| 6213 | Larson, Perry L Operating Co Inc | Dallas, TX 75382 | Oil & Gas Operator | Feb 2021 |
| 6214 | Las Animas Production Company | Midland, TX 79705 | Oil & Gas Operator | Mar 1995 |
| 6215 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 6216 | Lasalle Marine Corporation | Houston, TX 77056 | Oil Operator | Aug 2003 |
| 6217 | Lasater & Co, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Oct 2025 |
| 6218 | Last Chance Operating LLC | Wortham, TX 76693 | Oil Operator | Oct 2025 |
| 6219 | Last Dollar LLC | Big Lake, TX 76932 | Oil & Gas Operator | Oct 2025 |
| 6220 | Last Mile Production, LLC | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 6221 | Last Run, LLC | Rillito, AZ 85246 | Oil & Gas Operator | May 2020 |
| 6222 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 6223 | Latexo Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Feb 1997 |
| 6224 | Latigo (Texas), LLC | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 6225 | Latigo Oil & Gas, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Jul 2025 |
| 6226 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 6227 | Latigo Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 6228 | Latigo Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 6229 | Latimer, D. Gail Enterprises,Inc | Snyder, TX 79550 | Oil & Gas Operator | Jul 2004 |
| 6230 | Laughlin, W. M. Estate | Premont, TX 78375 | Oil & Gas Operator | Jun 2003 |
| 6231 | Laurel Fuel Company | Jackson, MS 39206 | Oil & Gas Operator | Dec 1996 |
| 6232 | Lavaca Canyon Petroleum LLC | Houston, TX 77094 | Oil & Gas Operator | Oct 2025 |
| 6233 | Lavaca River Operating Co., LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Oct 2025 |
| 6234 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 6235 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 6236 | Lawbar Petroleum, Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Aug 2003 |
| 6237 | Lawco Osage Operating, LLC | Bentonville, AR 72712 | Oil & Gas Operator | Oct 2025 |
| 6238 | Lawlis Oil Company | Hamlin, TX 79520 | Oil & Gas Operator | Oct 2025 |
| 6239 | Lawrence Energy Company | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 6240 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Oct 2025 |
| 6241 | Laws Exploration LLC | Mineral Wells, TX 76067 | Oil & Gas Operator | Oct 2025 |
| 6242 | Lawson Petroleum Co. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2009 |
| 6243 | Lawton, Jack Inc. | Sulphur, LA 70663 | Oil & Gas Operator | Dec 1995 |
| 6244 | Lay, J. D. | Lockhart, TX 78644 | Oil & Gas Operator | May 1997 |
| 6245 | Lay, Warren Leon | Lockhart, TX 78644 | Oil & Gas Operator | Aug 2023 |
| 6246 | Layline Energy I LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2019 |
| 6247 | Layline Petroleum I, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2013 |
| 6248 | Layton Energy Inc. | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 6249 | Layton Enterprises, Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Apr 2007 |
| 6250 | Lazarus Operating, LLC | Kilgore, TX 75663 | Oil Operator | Oct 2025 |
| 6251 | LBN Oil Co., Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | May 1998 |
| 6252 | Lbo Energy, Inc. | Kentfield, CA 94914 | Gas Operator | Nov 2002 |
| 6253 | LC Operating, LLC | Burkburnett, TX 76354 | Oil & Gas Operator | Oct 2025 |
| 6254 | LCT Energy, LP | Lewisville, AR 71845 | Oil & Gas Operator | Oct 2025 |
| 6255 | LCX Energy, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2010 |
| 6256 | LDF Energy, LLC | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 6257 | LDX Operating Company, LLC. | Amarillo, TX 79102 | Oil & Gas Operator | Oct 2025 |
| 6258 | Le Bas Operating Company, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2000 |
| 6259 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 6260 | Le Norman Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2019 |
| 6261 | Leach, D.L.,Jr. | Edna, TX 77957 | Gas Operator | Oct 2007 |
| 6262 | Leading Edge Energy LLC | San Antonio, TX 78205 | Oil Operator | Oct 2025 |
| 6263 | Leahy Oil, LLC | Arlington, TX 76006 | Oil Operator | Oct 2025 |
| 6264 | Lease Holders Acquisitions LLC | Yukon, OK 73099 | Gas Operator | Oct 2025 |
| 6265 | Lebow, Marvin E. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1997 |
| 6266 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 6267 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 6268 | Ledbetter, Jerald D. Estate Of | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 6269 | Ledbetter, Jerald D. Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2007 |
| 6270 | Ledbetter, Morris | Abilene, TX 79605 | Oil & Gas Operator | Jun 2005 |
| 6271 | Ledbetter, O. H. | Albany, TX 76430 | Oil & Gas Operator | Mar 1997 |
| 6272 | Ledger Operating Corporation | Abilene, TX 79601 | Oil Operator | Oct 2025 |
| 6273 | Lee Brothers Oil Co. | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 6274 | Lee Production Co. | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 6275 | Lee-Walker Mineral, LLC | Houston, TX 77269 | Oil Operator | Oct 2025 |
| 6276 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 6277 | Leejan Oil Company | Amarillo, TX 79109 | Oil & Gas Operator | Oct 2025 |
| 6278 | Leeper Oil Exp. & Prod. Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2005 |
| 6279 | Leexus Oil & Gas L.L.P. | Giddings, TX 78942 | Oil & Gas Operator | Jun 2008 |
| 6280 | Leexus Oil LLC | Giddings, TX 78942 | Oil & Gas Operator | Oct 2025 |
| 6281 | Leexus Operating Company | Austin, TX 78734 | Oil & Gas Operator | Aug 2007 |
| 6282 | Leffel'S, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2020 |
| 6283 | Left Behind Recovery, LLC | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 6284 | Left-Hand Ranch, LLC | Helotes, TX 78023 | Oil Operator | Oct 2025 |
| 6285 | Legacy Corporation, The | Cedar Park, TX 78613 | Oil & Gas Operator | Jun 2004 |
| 6286 | Legacy Energy Services | Jourdanton, TX 78026 | Oil Operator | Oct 2025 |
| 6287 | Legacy Exploration, LLC I | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 6288 | Legacy Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Oct 2025 |
| 6289 | Legacy Operating Company, LLC | Dallas, TX 75205 | Oil Operator | Jun 2024 |
| 6290 | Legacy Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Mar 2019 |
| 6291 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 6292 | Legado Gulf Coast, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2010 |
| 6293 | Legado Midcon, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 6294 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 6295 | Legend Energy Texas, LLC | Arlington, TX 76002 | Oil & Gas Operator | Oct 2025 |
| 6296 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6297 | Legend Natural Gas III, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6298 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6299 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 6300 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |