| 6501 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 6502 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 6503 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Feb 2026 |
| 6504 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Feb 2026 |
| 6505 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 6506 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 6507 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 6508 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 6509 | Lera | Borger, TX 79007 | Oil & Gas Operator | Feb 2026 |
| 6510 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 6511 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 6512 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 6513 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 6514 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | Feb 2026 |
| 6515 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | Feb 2026 |
| 6516 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 6517 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 6518 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 6519 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | Feb 2026 |
| 6520 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 6521 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | Feb 2026 |
| 6522 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 6523 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Nov 2025 |
| 6524 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 6525 | Lewis Petro Properties, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Feb 2026 |
| 6526 | Lewis, James B. Land & Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Nov 1998 |
| 6527 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 6528 | Lewis, T. K. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Feb 2026 |
| 6529 | Lewis, William T. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 6530 | Lewis, William T. Oil & Gas Expl | Graham, TX 76450 | Gas Operator | Jun 2014 |
| 6531 | Lex And Lace Petroleum, LLC | Houston, TX 77269 | Oil Operator | Feb 2026 |
| 6532 | Lexgas, Inc. | Roanoke, TX 76262 | Oil & Gas Operator | Feb 2026 |
| 6533 | Lexus Gas Corporation | Roanoke, TX 76262 | Oil & Gas Operator | Jul 2005 |
| 6534 | LGDC Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 6535 | Libertad Operating LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 6536 | Liberty Head Petroleum, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Sep 2017 |
| 6537 | Liberty National Corp | Dallas, TX 75206 | Oil Operator | Dec 2006 |
| 6538 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 6539 | Liberty Production Co | Houston, TX 77002 | Oil & Gas Operator | Nov 1994 |
| 6540 | Liberty Resources Co. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 1994 |
| 6541 | Libom Oil Company | Elmsford, NY 10523 | Oil & Gas Operator | Aug 2003 |
| 6542 | Lif-Tex Oil Recovery, Inc. | Luling, TX 78648 | Oil Operator | Feb 2026 |
| 6543 | Light Resources | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2013 |
| 6544 | Lighthouse Exploration, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jul 2007 |
| 6545 | Lighthouse Operating, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jun 2021 |
| 6546 | Lightning Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2026 |
| 6547 | Likover Oil Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2005 |
| 6548 | Lilley, C.C., Inc. | Dallardsville, TX 77332 | Oil & Gas Operator | Feb 2026 |
| 6549 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 6550 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 6551 | Lime Creek Enterprises | Aztec, NM 87410 | Oil & Gas Operator | Aug 2008 |
| 6552 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 6553 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 6554 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 6555 | Lime Rock Resources IV-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 6556 | Limestone Exploration II, LLC | Midland, TX 79704 | Oil & Gas Operator | Jun 2019 |
| 6557 | Limestone Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2011 |
| 6558 | Limestone Oil & Gas Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2002 |
| 6559 | Limited Resources | Perryton, TX 79070 | Oil & Gas Operator | Aug 2003 |
| 6560 | Linan Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 6561 | Linc Gulf Coast Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | Feb 2026 |
| 6562 | Linco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Feb 2026 |
| 6563 | Lincoln Energy Partners, LLC | Graham, TX 76450 | Oil Operator | Feb 2026 |
| 6564 | Lincoln Rock Corporation | Northfield, IL 60093 | Oil & Gas Operator | Jul 2003 |
| 6565 | Lindemann, James D. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 6566 | Lindemann, Robert Operating | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 6567 | Lindemann, W. L., DRLG. Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1994 |
| 6568 | Lindemann, W.L., Oper. Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2006 |
| 6569 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 6570 | Lindenmuth & Associates, Etex | Austin, TX 78703 | Oil & Gas Operator | Jun 2002 |
| 6571 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Feb 2026 |
| 6572 | Linder, John G. Jr. | Gladewater, TX 75647 | Oil & Gas Operator | Apr 2005 |
| 6573 | Linder, John Operating Co., LLC | Gladewater, TX 75647 | Oil & Gas Operator | Feb 2026 |
| 6574 | Lindholm Oil, Inc. | Mathis, TX 78368 | Gas Operator | Sep 2002 |
| 6575 | Lindley, J. R. | Richardson, TX 75081 | Oil & Gas Operator | Jun 2002 |
| 6576 | Lindow Oil & Gas, LLC | Caldwell, TX 77836 | Oil & Gas Operator | Feb 2026 |
| 6577 | Lindsay Oil Operations | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2010 |
| 6578 | Lindsay, Dick | Graham, TX 76450 | Oil & Gas Operator | May 2015 |
| 6579 | Lindsay, Robert L. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1995 |
| 6580 | Line Energy LLC | Columbus, NE 68601 | Oil Operator | Apr 2025 |
| 6581 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 6582 | Linn Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 6583 | Linop Corporation | Austin, TX 78728 | Oil & Gas Operator | Feb 2026 |
| 6584 | Lion Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2006 |
| 6585 | Lionheart Energy Corporation | Durango, CO 81301 | Oil & Gas Operator | Feb 2026 |
| 6586 | Lions Den Operating LLC | Kilgore, TX 75663 | Gas Operator | Feb 2026 |
| 6587 | Lipan Flats Production, L.L.C. | San Angelo, TX 76905 | Oil Operator | Feb 2026 |
| 6588 | Liquid Petroleum Resources, Inc. | Amarillo, TX 79120 | Gas Operator | Feb 2026 |
| 6589 | Lissie Corporation | San Antonio, TX 78209 | Oil & Gas Operator | Jan 1998 |
| 6590 | Lissner, Lindy | Jourdanton, TX 78026 | Oil & Gas Operator | Feb 2026 |
| 6591 | Litchfield Production Co. | Nederland, TX 77627 | Oil & Gas Operator | Feb 2026 |
| 6592 | Little & Whyte Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2008 |
| 6593 | Little Cypress Oil & Gas, L.L.C. | Fullerton, CA 92834 | Oil Operator | Feb 2026 |
| 6594 | Little Drop Oil Company | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 6595 | Little Oil & Gas | Pampa, TX 79065 | Oil & Gas Operator | Feb 2026 |
| 6596 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Dec 2025 |
| 6597 | Little, Lou Operating Co., Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2014 |
| 6598 | Little, Quintin Company,Inc.,The | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 6599 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 6600 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Feb 2026 |