| 16501 | Lebsack Oil Prod | | Oil & Gas Operator | Nov 1995 |
| 16502 | Lebsack Oil Production Inc. | Stafford, KS 67578 | Oil & Gas Operator | Apr 2026 |
| 16503 | Lebsack, James S. | Denver, CO 80222 | Oil Operator | Sep 1998 |
| 16504 | Lebus Oilfield Service Co | | Oil Operator | Sep 2009 |
| 16505 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Sep 2026 |
| 16506 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Sep 2026 |
| 16507 | Leclair-Westwood Inc | | Oil & Gas Operator | Mar 1982 |
| 16508 | Led Enterprises | El Dorado, KS 67042 | Oil Operator | Sep 1999 |
| 16509 | Led Enterprises LLC | El Dorado, KS 67042 | Oil Operator | Dec 2009 |
| 16510 | Ledbetter, Jerald D. Estate Of | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 16511 | Ledbetter, Jerald D. Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2007 |
| 16512 | Ledbetter, Morris | Abilene, TX 79605 | Oil & Gas Operator | Jun 2005 |
| 16513 | Ledbetter, O. H. | Albany, TX 76430 | Oil & Gas Operator | Mar 1997 |
| 16514 | Ledford Jan Oil & Gas | Duncan, OK 73533-3210 | Oil Operator | May 2026 |
| 16515 | Ledger Operating Corporation | Abilene, TX 79604 | Oil Operator | Sep 2026 |
| 16516 | Lee And Jane Laird | | Oil & Gas Operator | Dec 2002 |
| 16517 | Lee Brothers Oil Co. | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 16518 | Lee Donna Oil Co | | Oil & Gas Operator | Dec 1996 |
| 16519 | Lee E & M Lee Minter | New Kensington, PA 15068-1440 | Gas Operator | Dec 2003 |
| 16520 | Lee Energy Exploration LTD | Oklahoma City, OK 73102-7114 | Oil & Gas Operator | Jul 2008 |
| 16521 | Lee Energy LLC | Edmond, OK 73034-7668 | Oil Operator | Jan 2005 |
| 16522 | Lee Jr W E | Beggs, OK 74421-2683 | Oil & Gas Operator | May 2013 |
| 16523 | Lee Lamberson Inc. | | Oil & Gas Operator | Dec 2000 |
| 16524 | Lee Lynn MGMT Co | Indiana, PA 15701-3400 | Oil & Gas Operator | Dec 1991 |
| 16525 | Lee M Crane | Bloomfield, NM 87413 | Gas Operator | Jun 2026 |
| 16526 | Lee Mills | | Oil Operator | Feb 1992 |
| 16527 | Lee Of Tulsa Oil & Gas Inc | Tulsa, OK 74114-5634 | Oil & Gas Operator | Dec 2021 |
| 16528 | Lee Phillips Oil Company | | Oil Operator | Apr 2026 |
| 16529 | Lee Production Co. | Monahans, TX 79756 | Oil & Gas Operator | Sep 2026 |
| 16530 | Lee Ron | Emory, TX 75440 | Oil Operator | Jul 2025 |
| 16531 | Lee Roy Daigle | | Oil Operator | Dec 1992 |
| 16532 | Lee'S Summit Gas Co. | | Gas Operator | Dec 1933 |
| 16533 | Lee, R.A., Inc. | | Oil Operator | Nov 1972 |
| 16534 | Leed Energy LLC | Purcell, OK 73080-1383 | Oil & Gas Operator | May 2026 |
| 16535 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 16536 | Leedy Oil Produc | | Oil & Gas Operator | Dec 1995 |
| 16537 | Leedy Oil Producers | | Oil Operator | Nov 2009 |
| 16538 | Leejan Oil Company | Amarillo, TX 79109 | Oil & Gas Operator | Sep 2026 |
| 16539 | Leeman Don J | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 1998 |
| 16540 | Leeman Energy Corporation | Oklahoma City, OK 73118-1802 | Oil & Gas Operator | Mar 2015 |
| 16541 | Leeper Oil Exp. & Prod. Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2005 |
| 16542 | Lees Petroleum LLC | | Oil & Gas Operator | Jul 2000 |
| 16543 | Leeward Operators LLC | | Oil & Gas Operator | Jul 2011 |
| 16544 | Leexus Oil & Gas L.L.P. | Giddings, TX 78942 | Oil & Gas Operator | Jun 2008 |
| 16545 | Leexus Oil LLC | Giddings, TX 78942 | Oil & Gas Operator | Sep 2026 |
| 16546 | Leexus Operating Company | Austin, TX 78734 | Oil & Gas Operator | Aug 2007 |
| 16547 | Lefco Resources LLC | Henryetta, OK 74437 | Gas Operator | May 2026 |
| 16548 | Leffel'S, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2020 |
| 16549 | Left Behind Recovery, LLC | Luling, TX 78648 | Oil & Gas Operator | Sep 2026 |
| 16550 | Leg Up Operating Company LLC | Tulsa, OK 74135 | Oil Operator | May 2026 |
| 16551 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Jan 2025 |
| 16552 | Legacy Acres, LLC | South Dayton, NY 14138 | Gas Operator | Dec 2025 |
| 16553 | Legacy Corporation, The | Cedar Park, TX 78613 | Oil & Gas Operator | Jun 2004 |
| 16554 | Legacy Energy Inc | Carpinteria, CA 93013 | Oil & Gas Operator | Jun 2012 |
| 16555 | Legacy Energy Services | Jourdanton, TX 78026 | Oil Operator | Sep 2026 |
| 16556 | Legacy Energy Services LLC | Stillwater, OK 74074 | Oil & Gas Operator | Jun 2026 |
| 16557 | Legacy Energy, LLC | Russell, KS 67665 | Oil Operator | Apr 2026 |
| 16558 | Legacy Exploration, LLC I | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 16559 | Legacy Ogc LLC | Erie, PA 16509 | Oil & Gas Operator | Dec 2025 |
| 16560 | Legacy Oil & Gas ND, Inc. | | Oil & Gas Operator | Feb 2016 |
| 16561 | Legacy Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2026 |
| 16562 | Legacy Oklahoma Operators LLC | Shawnee, OK 74804-1447 | Oil & Gas Operator | May 2026 |
| 16563 | Legacy Operating Company | | Oil & Gas Operator | Aug 1992 |
| 16564 | Legacy Operating Company, LLC | Dallas, TX 75205 | Oil Operator | Jun 2024 |
| 16565 | Legacy Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Mar 2019 |
| 16566 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2026 |
| 16567 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Sep 2026 |
| 16568 | Legacy Resources Co., L.P. | | Oil & Gas Operator | Apr 2019 |
| 16569 | Legado DJ, LLC | | Oil & Gas Operator | Jul 2011 |
| 16570 | Legado Gulf Coast, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2010 |
| 16571 | Legado Midcon, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 16572 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 16573 | Legend Energy Corporation | Stillwater, OK 74074-1721 | Oil & Gas Operator | Aug 2022 |
| 16574 | Legend Energy LLC | Cherryvale, KS 67335 | Oil Operator | Apr 2026 |
| 16575 | Legend Energy Texas, LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 16576 | Legend Fund, LLC | | Oil & Gas Operator | Jan 2025 |
| 16577 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 16578 | Legend Natural Gas III, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 16579 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 16580 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 16581 | Legend Oil & Gas LTD. | Alpharetta, GA 30022 | Oil Operator | Mar 2015 |
| 16582 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |
| 16583 | Legendary Oil Co., Inc. | | Oil Operator | Feb 2004 |
| 16584 | Legendary Well Service, Inc. | | Oil Operator | Jan 1996 |
| 16585 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 16586 | Legg, Raymond | | Oil Operator | Dec 2010 |
| 16587 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 16588 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 16589 | Legleiter, Julius A. | Hays, KS 67601 | Oil Operator | Apr 1996 |
| 16590 | Legrand, Buck | Sedan, KS 67361 | Oil Operator | Jun 1994 |
| 16591 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 16592 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 16593 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 16594 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 16595 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 16596 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 16597 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 16598 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Apr 2026 |
| 16599 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 16600 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Apr 2026 |