| 17501 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 17502 | Legend Energy Corporation | Stillwater, OK 74074-1721 | Oil & Gas Operator | Aug 2022 |
| 17503 | Legend Energy LLC | Cherryvale, KS 67335 | Oil Operator | Aug 2025 |
| 17504 | Legend Energy Texas, LLC | Arlington, TX 76002 | Oil & Gas Operator | Feb 2026 |
| 17505 | Legend Fund, LLC | | Oil & Gas Operator | Jan 2025 |
| 17506 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 17507 | Legend Natural Gas III, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 17508 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 17509 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 17510 | Legend Oil & Gas LTD. | Alpharetta, GA 30022 | Oil Operator | Mar 2015 |
| 17511 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |
| 17512 | Legendary Oil Co., Inc. | | Oil Operator | Feb 2004 |
| 17513 | Legendary Well Service, Inc. | | Oil Operator | Jan 1996 |
| 17514 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 17515 | Legg, Raymond | | Oil Operator | Dec 2010 |
| 17516 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 17517 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 17518 | Legleiter, Julius A. | Hays, KS 67601 | Oil Operator | Apr 1996 |
| 17519 | Legrand, Buck | Sedan, KS 67361 | Oil Operator | Jun 1994 |
| 17520 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 17521 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 17522 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 17523 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 17524 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 17525 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 17526 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 17527 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Sep 2025 |
| 17528 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 17529 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Aug 2025 |
| 17530 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Sep 2025 |
| 17531 | Leist Brion Clyde | Boynton, OK 74422-4300 | Oil Operator | Nov 2025 |
| 17532 | Leith Operations | | Oil Operator | Jul 1989 |
| 17533 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 17534 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 17535 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Dec 2025 |
| 17536 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 17537 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 17538 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Dec 2025 |
| 17539 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 17540 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Aug 2025 |
| 17541 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | Feb 2026 |
| 17542 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 17543 | Lenape Resources LLC | | Oil & Gas Operator | Dec 2024 |
| 17544 | Lendrum Energy LLC | Cranberry, PA 16319-4009 | Oil & Gas Operator | Dec 2025 |
| 17545 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 17546 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 17547 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 17548 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 17549 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 17550 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 17551 | Leo Windham | | Oil Operator | Jul 1992 |
| 17552 | Leon J. Sabean | | Oil & Gas Operator | Dec 2018 |
| 17553 | Leonard 1&2 LLC | | Oil Operator | Dec 2025 |
| 17554 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Feb 2026 |
| 17555 | Leonard Vann | | Oil Operator | Oct 2025 |
| 17556 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 17557 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Feb 2026 |
| 17558 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 17559 | Leone, Thomas E. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 17560 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 17561 | Leopoldo P Bustamante | Midland, TX 79710 | Oil & Gas Operator | Apr 2012 |
| 17562 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 17563 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 17564 | Lepp, Paul N. | Cherry Creek, NY 14723 | Gas Operator | Dec 2024 |
| 17565 | Lera | Borger, TX 79007 | Oil & Gas Operator | Feb 2026 |
| 17566 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 17567 | Lerblance Richard C | Hartshorne, OK 74547 | Gas Operator | May 2019 |
| 17568 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 17569 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 17570 | Leroy W. & Charlie G. James | | Gas Operator | Oct 1979 |
| 17571 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 17572 | Les Miller | | Oil & Gas Operator | Dec 1991 |
| 17573 | Lesco Corp. | | Oil Operator | Dec 2000 |
| 17574 | Leshen Energy USA LLC | | Oil Operator | Jan 2025 |
| 17575 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 17576 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 17577 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Nov 2025 |
| 17578 | Lester L Moyer | Cooperstown, PA 16317-2917 | Gas Operator | Dec 2009 |
| 17579 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 17580 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 17581 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 17582 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | Feb 2026 |
| 17583 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | Feb 2026 |
| 17584 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900 | Oil & Gas Operator | Dec 1997 |
| 17585 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 17586 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 17587 | Levi Gas Co., Inc. | | Gas Operator | Mar 2019 |
| 17588 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 17589 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 17590 | Levinson Silvan E | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2012 |
| 17591 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | Feb 2026 |
| 17592 | Lewbet Inc | Perry, OK 73077 | Oil & Gas Operator | Aug 2024 |
| 17593 | Lewis & Clark Exploration | | Oil Operator | Feb 1989 |
| 17594 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 17595 | Lewis & Manziel | | Oil Operator | Apr 1989 |
| 17596 | Lewis A. Hembree Production Company | Shawnee, OK 74801 | Oil & Gas Operator | Nov 2025 |
| 17597 | Lewis Brad | Mulhall, OK 73063-0126 | Oil & Gas Operator | Jun 2010 |
| 17598 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Nov 2025 |
| 17599 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | Feb 2026 |
| 17600 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |