| 6401 | Liberty National Corp | Dallas, TX 75206 | Oil Operator | Dec 2006 |
| 6402 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 6403 | Liberty Production Co | Houston, TX 77002 | Oil & Gas Operator | Nov 1994 |
| 6404 | Liberty Resources Co. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 1994 |
| 6405 | Libom Oil Company | Elmsford, NY 10523 | Oil & Gas Operator | Aug 2003 |
| 6406 | Lif-Tex Oil Recovery, Inc. | Luling, TX 78648 | Oil Operator | Mar 2025 |
| 6407 | Light Resources | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2013 |
| 6408 | Lighthouse Exploration, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jul 2007 |
| 6409 | Lighthouse Operating, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jun 2021 |
| 6410 | Lightning Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2025 |
| 6411 | Likover Oil Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2005 |
| 6412 | Lilley, C.C., Inc. | Dallardsville, TX 77332 | Oil & Gas Operator | Mar 2025 |
| 6413 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 6414 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 6415 | Lime Creek Enterprises | Aztec, NM 87410 | Oil & Gas Operator | Aug 2008 |
| 6416 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 6417 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 6418 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 6419 | Lime Rock Resources IV-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 6420 | Limestone Exploration II, LLC | Midland, TX 79704 | Oil & Gas Operator | Jun 2019 |
| 6421 | Limestone Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2011 |
| 6422 | Limestone Oil & Gas Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2002 |
| 6423 | Limited Resources | Perryton, TX 79070 | Oil & Gas Operator | Aug 2003 |
| 6424 | Linan Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 6425 | Linc Gulf Coast Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | Mar 2025 |
| 6426 | Linco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Mar 2025 |
| 6427 | Lincoln Energy Partners, LLC | South Dennis, MA 02660 | Oil Operator | Mar 2025 |
| 6428 | Lincoln Rock Corporation | Northfield, IL 60093 | Oil & Gas Operator | Jul 2003 |
| 6429 | Lindemann, James D. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 6430 | Lindemann, Robert Operating | Holliday, TX 76366 | Oil & Gas Operator | Mar 2025 |
| 6431 | Lindemann, W. L., DRLG. Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1994 |
| 6432 | Lindemann, W.L., Oper. Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2006 |
| 6433 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 6434 | Lindenmuth & Associates, Etex | Austin, TX 78703 | Oil & Gas Operator | Jun 2002 |
| 6435 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Mar 2025 |
| 6436 | Linder, John G. Jr. | Gladewater, TX 75647 | Oil & Gas Operator | Apr 2005 |
| 6437 | Linder, John Operating Co., LLC | Gladewater, TX 75647 | Oil & Gas Operator | Mar 2025 |
| 6438 | Lindholm Oil, Inc. | Mathis, TX 78368 | Gas Operator | Sep 2002 |
| 6439 | Lindley, J. R. | Richardson, TX 75081 | Oil & Gas Operator | Jun 2002 |
| 6440 | Lindow Oil & Gas, LLC | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2025 |
| 6441 | Lindsay Oil Operations | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2010 |
| 6442 | Lindsay, Dick | Graham, TX 76450 | Oil & Gas Operator | May 2015 |
| 6443 | Lindsay, Robert L. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1995 |
| 6444 | Line Energy LLC | Columbus, NE 68601 | Oil Operator | Mar 2025 |
| 6445 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 6446 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 6447 | Linop Corporation | Austin, TX 78728 | Oil & Gas Operator | Mar 2025 |
| 6448 | Lion Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2006 |
| 6449 | Lionheart Energy Corporation | Durango, CO 81301 | Oil & Gas Operator | Mar 2025 |
| 6450 | Lipan Flats Production, L.L.C. | San Angelo, TX 76905 | Oil Operator | Mar 2025 |
| 6451 | Liquid Petroleum Resources, Inc. | Amarillo, TX 79120 | Gas Operator | Mar 2025 |
| 6452 | Lissner, Lindy | Jourdanton, TX 78026 | Oil & Gas Operator | Mar 2025 |
| 6453 | Litchfield Production Co. | Nederland, TX 77627 | Oil & Gas Operator | Mar 2025 |
| 6454 | Little & Whyte Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2008 |
| 6455 | Little Cypress Oil & Gas, L.L.C. | Fullerton, CA 92834 | Oil Operator | Mar 2025 |
| 6456 | Little Drop Oil Company | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 6457 | Little Oil & Gas | Pampa, TX 79065 | Oil & Gas Operator | Mar 2025 |
| 6458 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Dec 2024 |
| 6459 | Little, Lou Operating Co., Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2014 |
| 6460 | Little, Quintin Company,Inc.,The | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 6461 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 6462 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Mar 2025 |
| 6463 | Live Oak Op & Production, L.L.C. | Austin, TX 78759 | Oil & Gas Operator | Nov 2011 |
| 6464 | Live Oak Petroleum, Inc. | Dallas, TX 75251 | Gas Operator | Mar 2001 |
| 6465 | Live Oak Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Mar 2025 |
| 6466 | Live Oak/Operations, Inc. | Houston, TX 77019 | Gas Operator | Jul 2011 |
| 6467 | Lively Energy & Development Corp | Boerne, TX 78015 | Oil & Gas Operator | May 2015 |
| 6468 | Lively Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Mar 2025 |
| 6469 | Lively Resources, Inc. | Houston, TX 77056 | Gas Operator | Dec 1998 |
| 6470 | Livingston, David Oil Company | Haskell, TX 79521 | Oil & Gas Operator | Aug 2003 |
| 6471 | Livingston, F. L. | Megargel, TX 76370 | Oil & Gas Operator | May 2018 |
| 6472 | Lizard Lick Transport, LLC | Grandfalls, TX 79742 | Oil & Gas Operator | Mar 2025 |
| 6473 | LKD Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2018 |
| 6474 | LKKTX 2018, LLC | Burkburnett, TX 76354 | Oil Operator | Mar 2025 |
| 6475 | LKM Oil & Gas | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2024 |
| 6476 | LKM Oil And Gas LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Mar 2025 |
| 6477 | Llano Management Company, Inc. | El Campo, TX 77437 | Gas Operator | Oct 2001 |
| 6478 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 6479 | Llewellin Operating Company, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2017 |
| 6480 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 6481 | Llog Exploration Offshore, Inc. | Covington, LA 70433 | Oil & Gas Operator | Aug 2004 |
| 6482 | Llog Exploration Texas, L.P. | Covington, LA 70433 | Oil & Gas Operator | Mar 2025 |
| 6483 | Llog Production Company | Metairie, LA 70005 | Oil & Gas Operator | Apr 1995 |
| 6484 | Llox, L.L.C. | Covington, LA 70433 | Oil & Gas Operator | Mar 2025 |
| 6485 | LLR Operating | Pampa, TX 79065 | Oil Operator | Mar 2025 |
| 6486 | LLT Energy, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2025 |
| 6487 | LMG Operating Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2007 |
| 6488 | LMH Energy | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 6489 | LMN Oil And Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2008 |
| 6490 | LMP Exploration Operating, LLC | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Feb 2008 |
| 6491 | LMP Petroleum, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Jan 2010 |
| 6492 | LNH Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 2006 |
| 6493 | LNR Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 6494 | Lobo Energy, Inc. | Laredo, TX 78044 | Oil & Gas Operator | Nov 1996 |
| 6495 | Lobo Oil Company | Woodson, TX 76491 | Oil & Gas Operator | Sep 1999 |
| 6496 | Lobo Operating, Inc. | Houston, TX 77077 | Oil & Gas Operator | Dec 2024 |
| 6497 | Lobo Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 6498 | Lobo Resources, LTD. | Houston, TX 77077 | Oil & Gas Operator | Apr 1994 |
| 6499 | Locin Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 6500 | Lockout Corporation | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |