| 6201 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 6202 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 6203 | Lawbar Petroleum, Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Aug 2003 |
| 6204 | Lawco Osage Operating, LLC | Bentonville, AR 72712 | Oil & Gas Operator | Jun 2026 |
| 6205 | Lawlis Oil Company | Hamlin, TX 79520 | Oil & Gas Operator | Jun 2026 |
| 6206 | Lawrence Energy Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2026 |
| 6207 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Jun 2026 |
| 6208 | Laws Exploration LLC | Mineral Wells, TX 76067 | Oil & Gas Operator | Jun 2026 |
| 6209 | Lawson Petroleum Co. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2009 |
| 6210 | Lawton, Jack Inc. | Sulphur, LA 70663 | Oil & Gas Operator | Dec 1995 |
| 6211 | Lay, J. D. | Lockhart, TX 78644 | Oil & Gas Operator | May 1997 |
| 6212 | Lay, Warren Leon | Lockhart, TX 78644 | Oil & Gas Operator | Aug 2023 |
| 6213 | Layline Energy I LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2019 |
| 6214 | Layline Petroleum I, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2013 |
| 6215 | Layton Energy Inc. | Houston, TX 77027 | Oil & Gas Operator | Jun 2026 |
| 6216 | Layton Enterprises, Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Apr 2007 |
| 6217 | Lazarus Operating, LLC | Kilgore, TX 75663 | Oil Operator | Jun 2026 |
| 6218 | LBN Oil Co., Inc. | Corpus Christ, TX 78411 | Oil & Gas Operator | May 1998 |
| 6219 | Lbo Energy, Inc. | Kentfield, CA 94914 | Gas Operator | Nov 2002 |
| 6220 | LC Operating, LLC | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2026 |
| 6221 | LCT Energy, LP | Lewisville, AR 71845 | Oil & Gas Operator | Jun 2026 |
| 6222 | LCX Energy, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2010 |
| 6223 | LDF Energy, LLC | Midland, TX 79707 | Oil & Gas Operator | Jun 2026 |
| 6224 | LDX Operating Company, LLC. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 2026 |
| 6225 | Le Bas Operating Company, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2000 |
| 6226 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 6227 | Le Norman Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2019 |
| 6228 | Leading Edge Energy LLC | San Antonio, TX 78205 | Oil Operator | Jun 2026 |
| 6229 | Leahy Oil, LLC | Arlington, TX 76006 | Oil Operator | Jun 2026 |
| 6230 | Lease Holders Acquisitions LLC | Yukon, OK 73099 | Gas Operator | Jun 2026 |
| 6231 | Lebow, Marvin E. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1997 |
| 6232 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2026 |
| 6233 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2026 |
| 6234 | Ledbetter, Jerald D. Estate Of | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 6235 | Ledbetter, Jerald D. Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2007 |
| 6236 | Ledbetter, Morris | Abilene, TX 79605 | Oil & Gas Operator | Jun 2005 |
| 6237 | Ledbetter, O. H. | Albany, TX 76430 | Oil & Gas Operator | Mar 1997 |
| 6238 | Ledger Operating Corporation | Abilene, TX 79604 | Oil Operator | Jun 2026 |
| 6239 | Lee Brothers Oil Co. | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 6240 | Lee Production Co. | Monahans, TX 79756 | Oil & Gas Operator | Jun 2026 |
| 6241 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 6242 | Leejan Oil Company | Amarillo, TX 79109 | Oil & Gas Operator | Jun 2026 |
| 6243 | Leeper Oil Exp. & Prod. Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2005 |
| 6244 | Leexus Oil & Gas L.L.P. | Giddings, TX 78942 | Oil & Gas Operator | Jun 2008 |
| 6245 | Leexus Oil LLC | Giddings, TX 78942 | Oil & Gas Operator | Jun 2026 |
| 6246 | Leexus Operating Company | Austin, TX 78734 | Oil & Gas Operator | Aug 2007 |
| 6247 | Leffel'S, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2020 |
| 6248 | Left Behind Recovery, LLC | Luling, TX 78648 | Oil & Gas Operator | Jun 2026 |
| 6249 | Legacy Corporation, The | Cedar Park, TX 78613 | Oil & Gas Operator | Jun 2004 |
| 6250 | Legacy Energy Services | Jourdanton, TX 78026 | Oil Operator | Jun 2026 |
| 6251 | Legacy Exploration, LLC I | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 6252 | Legacy Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Jun 2026 |
| 6253 | Legacy Operating Company, LLC | Dallas, TX 75205 | Oil Operator | Jun 2024 |
| 6254 | Legacy Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Mar 2019 |
| 6255 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Jun 2026 |
| 6256 | Legado Gulf Coast, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2010 |
| 6257 | Legado Midcon, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 6258 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 6259 | Legend Energy Texas, LLC | Arlington, TX 76002 | Oil & Gas Operator | Jun 2026 |
| 6260 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6261 | Legend Natural Gas III, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6262 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6263 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 6264 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |
| 6265 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 6266 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 6267 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 6268 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 6269 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 6270 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 6271 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 6272 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 6273 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 6274 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Aug 2025 |
| 6275 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | Jun 2026 |
| 6276 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 6277 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 6278 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jun 2026 |
| 6279 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Jun 2026 |
| 6280 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 6281 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 6282 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 6283 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 6284 | Lera | Borger, TX 79007 | Oil & Gas Operator | Jun 2026 |
| 6285 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 6286 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 6287 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 6288 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 6289 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | Jun 2026 |
| 6290 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | Jun 2026 |
| 6291 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 6292 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 6293 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 6294 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | Jun 2026 |
| 6295 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 6296 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | Jun 2026 |
| 6297 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 6298 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2026 |
| 6299 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Jun 2026 |
| 6300 | Lewis Petro Properties, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Jun 2026 |