| 6401 | Little & Whyte Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2008 |
| 6402 | Little Cypress Oil & Gas, L.L.C. | Fullerton, CA 92834 | Oil Operator | Oct 2025 |
| 6403 | Little Drop Oil Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 6404 | Little Oil & Gas | Pampa, TX 79065 | Oil & Gas Operator | Oct 2025 |
| 6405 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Jun 2025 |
| 6406 | Little, Lou Operating Co., Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2014 |
| 6407 | Little, Quintin Company,Inc.,The | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 6408 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 6409 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 6410 | Live Oak Op & Production, L.L.C. | Austin, TX 78759 | Oil & Gas Operator | Nov 2011 |
| 6411 | Live Oak Petroleum, Inc. | Dallas, TX 75251 | Gas Operator | Mar 2001 |
| 6412 | Live Oak Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Oct 2025 |
| 6413 | Live Oak/Operations, Inc. | Houston, TX 77019 | Gas Operator | Jul 2011 |
| 6414 | Lively Energy & Development Corp | Boerne, TX 78015 | Oil & Gas Operator | May 2015 |
| 6415 | Lively Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 6416 | Lively Resources, Inc. | Houston, TX 77056 | Gas Operator | Dec 1998 |
| 6417 | Livingston, David Oil Company | Haskell, TX 79521 | Oil & Gas Operator | Aug 2003 |
| 6418 | Livingston, F. L. | Megargel, TX 76370 | Oil & Gas Operator | May 2018 |
| 6419 | Lizard Lick Transport, LLC | Grandfalls, TX 79742 | Oil & Gas Operator | Oct 2025 |
| 6420 | LKD Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2018 |
| 6421 | LKKTX 2018, LLC | Wichita Falls, TX 76305 | Oil Operator | Oct 2025 |
| 6422 | LKM Oil & Gas | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2024 |
| 6423 | LKM Oil And Gas LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 6424 | Llano Management Company, Inc. | El Campo, TX 77437 | Gas Operator | Oct 2001 |
| 6425 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 6426 | Llewellin Operating Company, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2017 |
| 6427 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 6428 | Llog Exploration Offshore, Inc. | Covington, LA 70433 | Oil & Gas Operator | Aug 2004 |
| 6429 | Llog Exploration Texas, L.P. | Covington, LA 70433 | Oil & Gas Operator | Oct 2025 |
| 6430 | Llog Production Company | Metairie, LA 70005 | Oil & Gas Operator | Apr 1995 |
| 6431 | Llox, L.L.C. | Covington, LA 70433 | Oil & Gas Operator | Oct 2025 |
| 6432 | LLT Energy, Inc. | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 6433 | LMH Energy | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2025 |
| 6434 | LMN Oil And Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2008 |
| 6435 | LMP Exploration Operating, LLC | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Feb 2008 |
| 6436 | LMP Petroleum, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Jan 2010 |
| 6437 | LNH Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 2006 |
| 6438 | LNR Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 6439 | Lobo Energy, Inc. | Laredo, TX 78044 | Oil & Gas Operator | Nov 1996 |
| 6440 | Lobo Oil Company | Woodson, TX 76491 | Oil & Gas Operator | Sep 1999 |
| 6441 | Lobo Operating, Inc. | Houston, TX 77077 | Oil & Gas Operator | Dec 2024 |
| 6442 | Lobo Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 6443 | Lobo Resources, LTD. | Houston, TX 77077 | Oil & Gas Operator | Apr 1994 |
| 6444 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Oct 2025 |
| 6445 | Lockout Corporation | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 6446 | Lode Holdings, LLC | Wichita Falls, TX 76301 | Oil Operator | Oct 2025 |
| 6447 | Lodel Energy Resources Corporation | Houston, TX 77042 | Oil Operator | Oct 2025 |
| 6448 | Lodestone Operating | Portland, TX 78374 | Oil & Gas Operator | Jul 2025 |
| 6449 | Lodestone Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Oct 2025 |
| 6450 | Lodi Drilling & Service Co. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 6451 | Lodi Operating Company LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 6452 | Loeb, Herman L, LLC | Lawrenceville, IL 62439 | Oil Operator | Dec 2017 |
| 6453 | Lofton, W. A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 1998 |
| 6454 | Log Operating, LLC | Eagle Pass, TX 78853 | Oil & Gas Operator | Oct 2025 |
| 6455 | Logas Energy, LLC | Lafayette, LA 70508 | Oil & Gas Operator | Oct 2025 |
| 6456 | Loin Energy Corporation | La Grange, TX 78945 | Oil & Gas Operator | Oct 2025 |
| 6457 | Lolocav, LLC | Sonora, TX 76950 | Oil & Gas Operator | Oct 2025 |
| 6458 | Loma Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2014 |
| 6459 | Loma VIsta Farms | Floresville, TX 78114 | Oil & Gas Operator | Jun 2019 |
| 6460 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 6461 | Lomax Operating Company, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2011 |
| 6462 | London Petroleum Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 6463 | Lone Oak Energy Inc | Kyle, TX 78640 | Oil & Gas Operator | Oct 2025 |
| 6464 | Lone Pine Production Assoc.,Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 1993 |
| 6465 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 6466 | Lone Star Land And Energy II LLC | Dallas, TX 75214 | Oil & Gas Operator | Jan 2020 |
| 6467 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 6468 | Lone Star Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2025 |
| 6469 | Lone Star Operating Company | Pearsall, TX 78061 | Oil & Gas Operator | Oct 2025 |
| 6470 | Lone Star Operations LLC | Lubbock, TX 79401 | Oil & Gas Operator | Oct 2025 |
| 6471 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 6472 | Lone Star Production | Lawn, TX 79530 | Oil & Gas Operator | Oct 2025 |
| 6473 | Lone Star Services | Pecos, TX 79772 | Oil & Gas Operator | Oct 2025 |
| 6474 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Oct 2025 |
| 6475 | Lone Wolf Operating Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2005 |
| 6476 | Lone Wolf Operating Company, LP | Haxtun, CO 80731 | Oil & Gas Operator | Sep 2009 |
| 6477 | Lonesome B, LLC | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 6478 | Lonestar Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 6479 | Lonestar Production Services | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 6480 | Long Operating, L.L.C. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2006 |
| 6481 | Long Petroleum, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2020 |
| 6482 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 6483 | Long, Edgar E. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 2011 |
| 6484 | Long, Larry T. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2017 |
| 6485 | Long-Tex Exploration, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Oct 2025 |
| 6486 | Longbotham Energy, LLC | Jackson, TN 38308 | Oil Operator | Oct 2025 |
| 6487 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 6488 | Longhorn Oil Properties, Inc. | Pottsboro, TX 75076 | Oil & Gas Operator | Oct 2025 |
| 6489 | Longhorn Service & Drilling Co. | Kermit, TX 79745 | Oil & Gas Operator | Jun 2019 |
| 6490 | Longshot Energy LLC | League City, TX 77573 | Oil Operator | Oct 2025 |
| 6491 | Longview Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2002 |
| 6492 | Lorac, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Oct 2025 |
| 6493 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | Jun 2025 |
| 6494 | Lorenz & Bosanko | San Antonio, TX 78247 | Oil & Gas Operator | Oct 2025 |
| 6495 | Lorenz, J. P., Jr. | La Vernia, TX 78121 | Oil & Gas Operator | Mar 2008 |
| 6496 | Lorlan Oil Company | Wink, TX 79789 | Oil & Gas Operator | Aug 2020 |
| 6497 | Losure Pet. Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2014 |
| 6498 | Losure, Ken | Borger, TX 79008 | Oil & Gas Operator | Oct 2025 |
| 6499 | Lotex Exploration & Prod. Co. | Carrollton, TX 75006 | Oil & Gas Operator | Jul 2011 |
| 6500 | Lothian Oil Texas I, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |