| 2501 | Lawbanco Drillin | | Oil Operator | Feb 1995 |
| 2502 | Lawbanco Drilling, Inc. | Natoma, KS 67651 | Oil Operator | May 1998 |
| 2503 | Lawco Holdings LLC | Bentonville, AR 72712 | Oil Operator | Jun 2026 |
| 2504 | Lawrence & Bush | Lawton, OK 73507 | Oil Operator | Dec 1995 |
| 2505 | Lawrence & Bush, Inc. | Pampa, TX 79065 | Oil Operator | Oct 1998 |
| 2506 | Lawrence Larry O | | Gas Operator | Sep 1993 |
| 2507 | Lawrence, Max | Cambridge, KS 67023 | Oil Operator | Sep 2025 |
| 2508 | Lawson Arthur C | | Oil Operator | Aug 1994 |
| 2509 | Lawson Petroleum Co. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2009 |
| 2510 | Lawson, A.C., Inc. | Derby, KS 67037 | Oil Operator | May 2026 |
| 2511 | Lawson, Thelma | Geuda Springs, KS 67051 | Oil Operator | Dec 2009 |
| 2512 | Laymon Oil Compa | | Oil & Gas Operator | Dec 1996 |
| 2513 | Laymon Oil Company | | Oil Operator | Feb 2001 |
| 2514 | Laymon Oil II, LLC | Neosho Falls, KS 66758 | Oil Operator | May 2026 |
| 2515 | Laymon, Michael | Yates Center, KS 66783 | Oil Operator | Apr 2026 |
| 2516 | Layne Energy Operating, LLC | Kansas City, KS 66106 | Oil & Gas Operator | Oct 2025 |
| 2517 | Layton Glenn F J | | Oil Operator | Mar 1986 |
| 2518 | Layton Oil Compa | | Oil & Gas Operator | Jul 1985 |
| 2519 | Lazer Petroleum | | Oil Operator | Jan 1993 |
| 2520 | LB Exploration, Inc. | Wichita, KS 67205 | Oil & Gas Operator | May 2026 |
| 2521 | LDH Operating LLC | Wichita, KS 67278 | Oil Operator | May 2026 |
| 2522 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 2523 | Leach, Elwood | Osawatomie, KS 66064 | Oil Operator | Dec 2009 |
| 2524 | Leake Keith D | Winfield, KS 67156-8871 | Oil Operator | Apr 2004 |
| 2525 | Leake, Keith D.(Deceased) Estate | Derby, KS 67037 | Oil Operator | Mar 2003 |
| 2526 | Lear Petroleum E | | Oil & Gas Operator | Jan 1986 |
| 2527 | Leasing & Development, Inc. | Wichita, KS 67202 | Oil Operator | Jun 2022 |
| 2528 | Leavell Resource | | Oil Operator | Dec 1993 |
| 2529 | Leavell Resources Corporation | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 2530 | Leben Corp. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2011 |
| 2531 | Leben Drilling I | | Oil & Gas Operator | Dec 1988 |
| 2532 | Leben Oil Corpor | | Oil & Gas Operator | Apr 1991 |
| 2533 | Leben Theodore I | | Oil & Gas Operator | Dec 1995 |
| 2534 | Lebosquet Gas Operations, LLC | Wichita, KS 67202 | Gas Operator | May 2026 |
| 2535 | Lebosquet John R | | Gas Operator | Dec 1994 |
| 2536 | Lebosquet, John W. | Wichita, KS 67202 | Gas Operator | May 2026 |
| 2537 | Lebow, Marvin E. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1997 |
| 2538 | Lebsack Oil Prod | | Oil & Gas Operator | Nov 1995 |
| 2539 | Lebsack Oil Production Inc. | Stafford, KS 67578 | Oil & Gas Operator | May 2026 |
| 2540 | Lebsack, James S. | Denver, CO 80222 | Oil Operator | Sep 1998 |
| 2541 | Led Enterprises | El Dorado, KS 67042 | Oil Operator | Sep 1999 |
| 2542 | Led Enterprises LLC | El Dorado, KS 67042 | Oil Operator | Dec 2009 |
| 2543 | Lee Donna Oil Co | | Oil & Gas Operator | Dec 1996 |
| 2544 | Lee Phillips Oil Company | | Oil Operator | May 2026 |
| 2545 | Leedy Oil Produc | | Oil & Gas Operator | Dec 1995 |
| 2546 | Leedy Oil Producers | | Oil Operator | Nov 2009 |
| 2547 | Legacy Energy, LLC | Russell, KS 67665 | Oil Operator | May 2026 |
| 2548 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2026 |
| 2549 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Sep 2026 |
| 2550 | Legend Energy LLC | Cherryvale, KS 67335 | Oil Operator | Apr 2026 |
| 2551 | Legend Oil & Gas LTD. | Alpharetta, GA 30022 | Oil Operator | Mar 2015 |
| 2552 | Legleiter, Julius A. | Hays, KS 67601 | Oil Operator | Apr 1996 |
| 2553 | Legrand, Buck | Sedan, KS 67361 | Oil Operator | Jun 1994 |
| 2554 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 2555 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 2556 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | May 2026 |
| 2557 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 2558 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | May 2026 |
| 2559 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | May 2026 |
| 2560 | Leith Operations | | Oil Operator | Jul 1989 |
| 2561 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 2562 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 2563 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 2564 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 2565 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Jun 2026 |
| 2566 | Lewis Oil & Gas Of Galva, Inc. | Galva, KS 67443 | Oil Operator | May 2026 |
| 2567 | LH Oil, LLC | Ottawa, KS 66067 | Oil Operator | May 2026 |
| 2568 | Liberty Enterpri | | Oil Operator | Jan 1987 |
| 2569 | Liberty Oper & Compl, Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2022 |
| 2570 | Liboc, Inc. | New York, NY 10110 | Oil & Gas Operator | Dec 2009 |
| 2571 | Liedtke Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2022 |
| 2572 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 2573 | Lincoln 77 Inc | Chanute, KS 66720 | Oil Operator | Dec 2001 |
| 2574 | Line, Jerry W., SR. | Tulsa, OK 74137 | Oil Operator | Nov 1996 |
| 2575 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 2576 | Lio-1 Corporation | Las Vegas, NV 89116 | Oil Operator | Apr 2026 |
| 2577 | Lion Oil Company | Chanute, KS 66720 | Oil Operator | Dec 1986 |
| 2578 | Litan, David | Wichita, KS 67218 | Oil Operator | Jun 1990 |
| 2579 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Jun 2026 |
| 2580 | Little Guy Oil & Gas, Inc. | Pratt, KS 67124 | Oil Operator | Aug 2013 |
| 2581 | Little Joe'S Oil Company | | Oil Operator | Jul 2020 |
| 2582 | Little Neil Oil | | Oil Operator | Jul 1994 |
| 2583 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Jul 2026 |
| 2584 | Lloyd Drilling C | | Oil Operator | Aug 1995 |
| 2585 | Lloyd Drilling Company | Morland, KS 67650 | Oil Operator | Oct 2009 |
| 2586 | Lobo Oil & Gas, LLC | Benedict, KS 66714 | Oil Operator | Jan 2019 |
| 2587 | Lobo Production, Inc | Goodland, KS 67735 | Gas Operator | May 2026 |
| 2588 | Lockard Petroleum, Inc. | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 2589 | Lockhart Oil LLC | Neosho Falls, KS 66758 | Oil Operator | May 2026 |
| 2590 | Lockridge, John P | Denver, CO 80202 | Gas Operator | Mar 1999 |
| 2591 | Loeb Herman L | | Oil & Gas Operator | Jan 1996 |
| 2592 | Loewen E K | | Oil Operator | Mar 1986 |
| 2593 | Loewen Operator | | Oil & Gas Operator | Mar 1995 |
| 2594 | Loewen Operator, Inc. | Canton, KS 67428 | Oil & Gas Operator | Nov 2025 |
| 2595 | Logsdon Richard | | Oil Operator | Mar 1988 |
| 2596 | Lone Jack Oil Co. | | Oil Operator | May 2026 |
| 2597 | Lone Star Interests, Inc. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 2598 | Lone Star Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | May 2026 |
| 2599 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 2600 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2026 |