| 2501 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 2502 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 2503 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 2504 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Jan 2024 |
| 2505 | Lewis Oil & Gas Of Galva, Inc. | Galva, KS 67443 | Oil Operator | Jan 2024 |
| 2506 | Lewis, Beverly J | | Oil Operator | Dec 2023 |
| 2507 | LH Oil, LLC | Ottawa, KS 66067 | Oil Operator | Jan 2024 |
| 2508 | Liberty Enterpri | | Oil Operator | Jan 1987 |
| 2509 | Liberty Oper & Compl, Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2022 |
| 2510 | Liberty Operations & Completion, Inc | Plainville, KS 67663 | Oil Operator | Jan 2024 |
| 2511 | Liboc, Inc. | New York, NY 10110 | Oil & Gas Operator | Dec 2009 |
| 2512 | Liedtke Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2022 |
| 2513 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 2514 | Lincoln 77, Inc. | Chanute, KS 66720 | Oil Operator | Dec 2001 |
| 2515 | Line, Jerry W., SR. | Tulsa, OK 74137 | Oil Operator | Nov 1996 |
| 2516 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 2517 | Lio-1 Corporation | Las Vegas, NV 89116 | Oil Operator | Sep 2023 |
| 2518 | Lion Oil Company | Chanute, KS 66720 | Oil Operator | Dec 1986 |
| 2519 | Litan, David | Wichita, KS 67218 | Oil Operator | Jun 1990 |
| 2520 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Jan 2024 |
| 2521 | Little Guy Oil & Gas, Inc. | Pratt, KS 67124 | Oil Operator | Aug 2013 |
| 2522 | Little Joe'S Oil Company | | Oil Operator | Jan 2023 |
| 2523 | Little Neil Oil | | Oil Operator | Jul 1994 |
| 2524 | Little River Energy Co. | Drumright, OK 74030 | Oil & Gas Operator | Jan 2024 |
| 2525 | Lloyd Drilling C | | Oil Operator | Aug 1995 |
| 2526 | Lloyd Drilling Company | Morland, KS 67650 | Oil Operator | Oct 2009 |
| 2527 | Lobo Oil & Gas, LLC | Benedict, KS 66714 | Oil Operator | Jan 2019 |
| 2528 | Lobo Production, Inc | Goodland, KS 67735 | Gas Operator | Jan 2024 |
| 2529 | Lockard Petroleum, Inc. | Hamilton, KS 66853 | Oil Operator | Jan 2024 |
| 2530 | Lockhart Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Jan 2024 |
| 2531 | Lockridge, John P | Denver, CO 80202 | Gas Operator | Mar 1999 |
| 2532 | Loeb Herman L | | Oil & Gas Operator | Jan 1996 |
| 2533 | Loewen E K | | Oil Operator | Mar 1986 |
| 2534 | Loewen Operator | | Oil & Gas Operator | Mar 1995 |
| 2535 | Loewen Operator, Inc. | Canton, KS 67428 | Oil & Gas Operator | Jan 2024 |
| 2536 | Logsdon Richard | | Oil Operator | Mar 1988 |
| 2537 | Lone Jack Oil Co. | | Oil Operator | Dec 2023 |
| 2538 | Lone Star Interests, Inc. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 2539 | Lone Star Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2024 |
| 2540 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 2541 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | May 2024 |
| 2542 | Lone Wolf Oil & Gas Co., LLC | Moline, KS 67353 | Oil & Gas Operator | Jan 2024 |
| 2543 | Lone Wolf Oil LLC | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 2544 | Long And Ware Oil, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Jan 2021 |
| 2545 | Long Drilling Company, LLC | Hamilton, KS 66853 | Oil Operator | Dec 2023 |
| 2546 | Long Shot Oil Co. | | Oil Operator | Aug 1997 |
| 2547 | Long, Edwin A. And Glenda | Hamilton, KS 66853 | Oil Operator | Aug 2000 |
| 2548 | Long, Lewis C., A General Partnership | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 2549 | Long, Marshall | Chase, KS 67524 | Oil Operator | Mar 1986 |
| 2550 | Longhorn Crude, LLC | Jetmore, KS 67854 | Oil Operator | Nov 2023 |
| 2551 | Longhorn Energy | | Oil & Gas Operator | Jun 1991 |
| 2552 | Longhorn Oil & Gas | | Oil Operator | Nov 2023 |
| 2553 | Longhorn Propert | | Oil Operator | Feb 1989 |
| 2554 | Longton Explorat | | Oil & Gas Operator | Jul 1993 |
| 2555 | Lonny Bruce Operations, L.L.C. | McPherson, KS 67460 | Oil & Gas Operator | Apr 2009 |
| 2556 | Lorenz, Barton T. | Cherryvale, KS 67335 | Oil & Gas Operator | Jul 2013 |
| 2557 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 2558 | Lorenzen Oil Company, Inc. | O?Fallon, MO 63368 | Oil Operator | Dec 2023 |
| 2559 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Jan 2024 |
| 2560 | Louis Dreyfus Natural Gas Corp. | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2015 |
| 2561 | Loveland Energy LLC | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 2562 | Lowry Exploratio | | Oil Operator | May 1994 |
| 2563 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2024 |
| 2564 | Loyd, John H. | Warrensburg, MO 64903 | Oil Operator | Aug 2000 |
| 2565 | Lozoya, Jesus Antonio | Coldwater, KS 67029 | Oil & Gas Operator | Jan 2024 |
| 2566 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 2567 | LRC Development Corporation | Hays, KS 67601 | Oil Operator | Mar 2009 |
| 2568 | LRR Partnership | | Oil Operator | Sep 2023 |
| 2569 | Lucky Crude, LLC | Erie, KS 66733 | Oil Operator | Jan 2024 |
| 2570 | Lucky Iron | | Oil Operator | Jan 2024 |
| 2571 | Luff Exploration Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2024 |
| 2572 | Lutz, Jerry | Reed City, MI 49677 | Gas Operator | Apr 1987 |
| 2573 | Lutz, Lisa Morgan | Fayetteville, AR 72702 | Oil Operator | Jan 2024 |
| 2574 | Lutz, Scott T. Trust | Fayetteville, AR 72702 | Oil Operator | Mar 2011 |
| 2575 | Lutz, Scott Thomas, Estate Of | Fayetteville, AR 72703 | Oil Operator | Aug 1996 |
| 2576 | Lutz, Thomas C. | | Oil Operator | Dec 2009 |
| 2577 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 2578 | Lyon Oil Company | | Oil Operator | Mar 1985 |
| 2579 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |
| 2580 | Lyons, Clarence Jr. | Chanute, KS 66720 | Oil Operator | Dec 2023 |
| 2581 | M & B Well Servi | | Oil Operator | Aug 1990 |
| 2582 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
| 2583 | M & C Oil Incorp | | Oil Operator | Mar 1995 |
| 2584 | M & D Oil And Gas, LLC | Sterling, KS 67579 | Oil Operator | Jan 2024 |
| 2585 | M & D Oil Co, A General Partnership | Beaver, OK 73932 | Gas Operator | Oct 2022 |
| 2586 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | May 2024 |
| 2587 | M & L Oil Compan | | Oil Operator | Jun 1993 |
| 2588 | M & M Contractin | | Oil Operator | Mar 1992 |
| 2589 | M & M Exploration, Inc. | Westminster, CO 80031 | Oil & Gas Operator | Feb 2024 |
| 2590 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Jan 2024 |
| 2591 | M & M Well Service, LLC | Medicine Lodge, KS 67104 | Gas Operator | Jan 2024 |
| 2592 | M & O Oil Co.A General Partnership | Fredonia, KS 66736 | Oil Operator | Dec 2023 |
| 2593 | M & S Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2019 |
| 2594 | M & W Oil LLC | Hamilton, KS 66853 | Oil Operator | Nov 2015 |
| 2595 | M D B Operations | | Oil Operator | Dec 1988 |
| 2596 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jan 2024 |
| 2597 | M G Oil Inc | Russell, KS 67665 | Oil Operator | Jan 2024 |
| 2598 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 2599 | M K Oil Company | Gillette, WY 82717-3470 | Oil & Gas Operator | Jan 2024 |
| 2600 | M M Energy, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Jan 2024 |