| 16501 | Lees Petroleum LLC | | Oil & Gas Operator | Jul 2000 |
| 16502 | Leeward Operators LLC | | Oil & Gas Operator | Jul 2011 |
| 16503 | Leexus Oil & Gas L.L.P. | Giddings, TX 78942 | Oil & Gas Operator | Jun 2008 |
| 16504 | Leexus Oil LLC | Giddings, TX 78942 | Oil & Gas Operator | Jun 2026 |
| 16505 | Leexus Operating Company | Austin, TX 78734 | Oil & Gas Operator | Aug 2007 |
| 16506 | Lefco Resources LLC | Henryetta, OK 74437 | Gas Operator | Feb 2026 |
| 16507 | Leffel'S, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2020 |
| 16508 | Left Behind Recovery, LLC | Luling, TX 78648 | Oil & Gas Operator | Jun 2026 |
| 16509 | Leg Up Operating Company LLC | Tulsa, OK 74135 | Oil Operator | Feb 2026 |
| 16510 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Jan 2025 |
| 16511 | Legacy Acres, LLC | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 16512 | Legacy Corporation, The | Cedar Park, TX 78613 | Oil & Gas Operator | Jun 2004 |
| 16513 | Legacy Energy Inc | Carpinteria, CA 93013 | Oil & Gas Operator | Jun 2012 |
| 16514 | Legacy Energy Services | Jourdanton, TX 78026 | Oil Operator | Jun 2026 |
| 16515 | Legacy Energy Services LLC | Stillwater, OK 74074 | Oil & Gas Operator | Mar 2026 |
| 16516 | Legacy Energy, LLC | Russell, KS 67665 | Oil Operator | Feb 2026 |
| 16517 | Legacy Exploration, LLC I | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 16518 | Legacy Ogc LLC | Erie, PA 16509 | Oil & Gas Operator | Dec 2025 |
| 16519 | Legacy Oil & Gas ND, Inc. | | Oil & Gas Operator | Feb 2016 |
| 16520 | Legacy Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Jun 2026 |
| 16521 | Legacy Oklahoma Operators LLC | Shawnee, OK 74804-1447 | Oil & Gas Operator | Feb 2026 |
| 16522 | Legacy Operating Company | | Oil & Gas Operator | Aug 1992 |
| 16523 | Legacy Operating Company, LLC | Dallas, TX 75205 | Oil Operator | Jun 2024 |
| 16524 | Legacy Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Mar 2019 |
| 16525 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2026 |
| 16526 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Jun 2026 |
| 16527 | Legacy Resources Co., L.P. | | Oil & Gas Operator | Apr 2019 |
| 16528 | Legado DJ, LLC | | Oil & Gas Operator | Jul 2011 |
| 16529 | Legado Gulf Coast, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2010 |
| 16530 | Legado Midcon, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 16531 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 16532 | Legend Energy Corporation | Stillwater, OK 74074-1721 | Oil & Gas Operator | Aug 2022 |
| 16533 | Legend Energy LLC | Cherryvale, KS 67335 | Oil Operator | Dec 2025 |
| 16534 | Legend Energy Texas, LLC | Arlington, TX 76002 | Oil & Gas Operator | Jun 2026 |
| 16535 | Legend Fund, LLC | | Oil & Gas Operator | Jan 2025 |
| 16536 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 16537 | Legend Natural Gas III, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 16538 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 16539 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 16540 | Legend Oil & Gas LTD. | Alpharetta, GA 30022 | Oil Operator | Mar 2015 |
| 16541 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |
| 16542 | Legendary Oil Co., Inc. | | Oil Operator | Feb 2004 |
| 16543 | Legendary Well Service, Inc. | | Oil Operator | Jan 1996 |
| 16544 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 16545 | Legg, Raymond | | Oil Operator | Dec 2010 |
| 16546 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 16547 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 16548 | Legleiter, Julius A. | Hays, KS 67601 | Oil Operator | Apr 1996 |
| 16549 | Legrand, Buck | Sedan, KS 67361 | Oil Operator | Jun 1994 |
| 16550 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 16551 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 16552 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 16553 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 16554 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 16555 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 16556 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 16557 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Feb 2026 |
| 16558 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 16559 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Jan 2026 |
| 16560 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Feb 2026 |
| 16561 | Leith Operations | | Oil Operator | Jul 1989 |
| 16562 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 16563 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 16564 | Leland Champman Dba Champman Oil Company | Duncan, OK 73533 | Oil & Gas Operator | Mar 2026 |
| 16565 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Apr 2026 |
| 16566 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 16567 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 16568 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Mar 2026 |
| 16569 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 16570 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Aug 2025 |
| 16571 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | Jun 2026 |
| 16572 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 16573 | Lenape Resources LLC | | Oil & Gas Operator | Dec 2024 |
| 16574 | Lendrum Energy LLC | Cranberry, PA 16319-4009 | Oil & Gas Operator | Dec 2025 |
| 16575 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 16576 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2025 |
| 16577 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 16578 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 16579 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 16580 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 16581 | Leo Windham | | Oil Operator | Jul 1992 |
| 16582 | Leon J. Sabean | | Oil & Gas Operator | Dec 2018 |
| 16583 | Leonard 1&2 LLC | | Oil Operator | Mar 2026 |
| 16584 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jun 2026 |
| 16585 | Leonard Vann | | Oil Operator | Oct 2025 |
| 16586 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 16587 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Jun 2026 |
| 16588 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 16589 | Leone, Thomas E. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 16590 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 16591 | Leopold Oil Company | Bartlesville, OK 74003 | Oil & Gas Operator | Mar 2026 |
| 16592 | Leopoldo P Bustamante | Midland, TX 79710 | Oil & Gas Operator | Apr 2012 |
| 16593 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 16594 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 16595 | Lepp, Paul N. | Cherry Creek, NY 14723 | Gas Operator | Dec 2024 |
| 16596 | Lera | Borger, TX 79007 | Oil & Gas Operator | Jun 2026 |
| 16597 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 16598 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 16599 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 16600 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |