| 6301 | Layline Petroleum I, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2013 |
| 6302 | Layton Energy Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 6303 | Layton Enterprises, Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Apr 2007 |
| 6304 | Lazarus Operating, LLC | Kilgore, TX 75663 | Oil Operator | Mar 2025 |
| 6305 | LBN Oil Co., Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | May 1998 |
| 6306 | Lbo Energy, Inc. | Kentfield, CA 94914 | Gas Operator | Nov 2002 |
| 6307 | LC Operating, LLC | Burkburnett, TX 76354 | Oil & Gas Operator | Mar 2025 |
| 6308 | LCT Energy, LP | Lewisville, AR 71845 | Oil & Gas Operator | Mar 2025 |
| 6309 | LCX Energy, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2010 |
| 6310 | LDF Energy, LLC | Midland, TX 79707 | Oil & Gas Operator | Mar 2025 |
| 6311 | LDX Operating Company, LLC. | Amarillo, TX 79102 | Oil & Gas Operator | Mar 2025 |
| 6312 | Le Bas Operating Company, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2000 |
| 6313 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 6314 | Le Norman Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2019 |
| 6315 | Leach, D.L.,Jr. | Edna, TX 77957 | Gas Operator | Oct 2007 |
| 6316 | Leading Edge Energy LLC | San Antonio, TX 78205 | Oil Operator | Mar 2025 |
| 6317 | Leahy Oil, LLC | Arlington, TX 76006 | Oil Operator | Mar 2025 |
| 6318 | Lease Holders Acquisitions LLC | Yukon, OK 73099 | Gas Operator | Mar 2025 |
| 6319 | Lebow, Marvin E. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1997 |
| 6320 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2025 |
| 6321 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2025 |
| 6322 | Ledbetter, Jerald D. Estate Of | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 6323 | Ledbetter, Jerald D. Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2007 |
| 6324 | Ledbetter, Morris | Abilene, TX 79605 | Oil & Gas Operator | Jun 2005 |
| 6325 | Ledbetter, O. H. | Albany, TX 76430 | Oil & Gas Operator | Mar 1997 |
| 6326 | Ledger Operating Corporation | Abilene, TX 79601 | Oil Operator | Mar 2025 |
| 6327 | Lee Brothers Oil Co. | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 6328 | Lee Energy LLC | Edmond, OK 73034-7668 | Oil Operator | Jan 2005 |
| 6329 | Lee Production Co. | Monahans, TX 79756 | Oil & Gas Operator | Mar 2025 |
| 6330 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 6331 | Leejan Oil Company | Amarillo, TX 79109 | Oil & Gas Operator | Mar 2025 |
| 6332 | Leeper Oil Exp. & Prod. Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2005 |
| 6333 | Leexus Oil & Gas L.L.P. | Giddings, TX 78942 | Oil & Gas Operator | Jun 2008 |
| 6334 | Leexus Oil LLC | Giddings, TX 78942 | Oil & Gas Operator | Mar 2025 |
| 6335 | Leexus Operating Company | Austin, TX 78734 | Oil & Gas Operator | Aug 2007 |
| 6336 | Leffel'S, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2020 |
| 6337 | Lefforge & Klein | Amarillo, TX 79114 | Gas Operator | Jun 1997 |
| 6338 | Left Behind Recovery, LLC | Luling, TX 78648 | Oil & Gas Operator | Mar 2025 |
| 6339 | Legacy Corporation, The | Cedar Park, TX 78613 | Oil & Gas Operator | Jun 2004 |
| 6340 | Legacy Energy Services | Jourdanton, TX 78026 | Oil Operator | Mar 2025 |
| 6341 | Legacy Exploration, LLC I | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 6342 | Legacy Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2025 |
| 6343 | Legacy Operating Company, LLC | Dallas, TX 75205 | Oil Operator | Jun 2024 |
| 6344 | Legacy Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Mar 2019 |
| 6345 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Mar 2025 |
| 6346 | Legado Gulf Coast, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2010 |
| 6347 | Legado Midcon, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 6348 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 6349 | Legend Energy Texas, LLC | Arlington, TX 76002 | Oil & Gas Operator | Mar 2025 |
| 6350 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6351 | Legend Natural Gas III, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6352 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 6353 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 6354 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |
| 6355 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 6356 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 6357 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 6358 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 6359 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 6360 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 6361 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2025 |
| 6362 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 6363 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 6364 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Jan 2025 |
| 6365 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | Mar 2025 |
| 6366 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 6367 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 6368 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Mar 2025 |
| 6369 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Mar 2025 |
| 6370 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 6371 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 6372 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 6373 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 6374 | Lera | Borger, TX 79007 | Oil & Gas Operator | Mar 2025 |
| 6375 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 6376 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 6377 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 6378 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 6379 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | Mar 2025 |
| 6380 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | Mar 2025 |
| 6381 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 6382 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 6383 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 6384 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | Mar 2025 |
| 6385 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 6386 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | Mar 2025 |
| 6387 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 6388 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Dec 2024 |
| 6389 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Mar 2025 |
| 6390 | Lewis Petro Properties, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Mar 2025 |
| 6391 | Lewis, James B. Land & Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Nov 1998 |
| 6392 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 6393 | Lewis, T. K. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Mar 2025 |
| 6394 | Lewis, William T. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 6395 | Lex And Lace Petroleum, LLC | Southlake, TX 76092 | Oil Operator | Mar 2025 |
| 6396 | Lexgas, Inc. | Roanoke, TX 76262 | Oil & Gas Operator | Mar 2025 |
| 6397 | Lexus Gas Corporation | Roanoke, TX 76262 | Oil & Gas Operator | Jul 2005 |
| 6398 | LGDC Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2025 |
| 6399 | Libertad Operating LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 6400 | Liberty Head Petroleum, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Sep 2017 |