| 2601 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Jan 2025 |
| 2602 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Dec 2024 |
| 2603 | Leith Operations | | Oil Operator | Jul 1989 |
| 2604 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 2605 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 2606 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 2607 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 2608 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Feb 2025 |
| 2609 | Lewis Oil & Gas Of Galva, Inc. | Galva, KS 67443 | Oil Operator | Jan 2025 |
| 2610 | LH Oil, LLC | Ottawa, KS 66067 | Oil Operator | Jan 2025 |
| 2611 | Liberty Enterpri | | Oil Operator | Jan 1987 |
| 2612 | Liberty Oper & Compl, Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2022 |
| 2613 | Liberty Operations & Completion, Inc | Plainville, KS 67663 | Oil Operator | Dec 2024 |
| 2614 | Liboc, Inc. | New York, NY 10110 | Oil & Gas Operator | Dec 2009 |
| 2615 | Liedtke Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2022 |
| 2616 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 2617 | Lincoln 77, Inc. | Chanute, KS 66720 | Oil Operator | Dec 2001 |
| 2618 | Lind Oil & Gas | Tulsa, OK 74136 | Gas Operator | Nov 2000 |
| 2619 | Line, Jerry W., SR. | Tulsa, OK 74137 | Oil Operator | Nov 1996 |
| 2620 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 2621 | Lio-1 Corporation | Las Vegas, NV 89116 | Oil Operator | Aug 2024 |
| 2622 | Lion Oil Company | Chanute, KS 66720 | Oil Operator | Dec 1986 |
| 2623 | Litan, David | Wichita, KS 67218 | Oil Operator | Jun 1990 |
| 2624 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Feb 2025 |
| 2625 | Little Guy Oil & Gas, Inc. | Pratt, KS 67124 | Oil Operator | Aug 2013 |
| 2626 | Little Joe'S Oil Company | | Oil Operator | Jul 2020 |
| 2627 | Little Neil Oil | | Oil Operator | Jul 1994 |
| 2628 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Mar 2025 |
| 2629 | Lloyd Drilling C | | Oil Operator | Aug 1995 |
| 2630 | Lloyd Drilling Company | Morland, KS 67650 | Oil Operator | Oct 2009 |
| 2631 | Lobo Oil & Gas, LLC | Benedict, KS 66714 | Oil Operator | Jan 2019 |
| 2632 | Lobo Production, Inc | Goodland, KS 67735 | Gas Operator | Jan 2025 |
| 2633 | Lockard Petroleum, Inc. | Hamilton, KS 66853 | Oil Operator | Jan 2025 |
| 2634 | Lockhart Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Jan 2025 |
| 2635 | Lockridge, John P | Denver, CO 80202 | Gas Operator | Mar 1999 |
| 2636 | Loeb Herman L | | Oil & Gas Operator | Jan 1996 |
| 2637 | Loewen E K | | Oil Operator | Mar 1986 |
| 2638 | Loewen Operator | | Oil & Gas Operator | Mar 1995 |
| 2639 | Loewen Operator, Inc. | Canton, KS 67428 | Oil & Gas Operator | Jan 2025 |
| 2640 | Logsdon Richard | | Oil Operator | Mar 1988 |
| 2641 | Lone Jack Oil Co. | | Oil Operator | Dec 2024 |
| 2642 | Lone Star Interests, Inc. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 2643 | Lone Star Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2025 |
| 2644 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 2645 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | May 2025 |
| 2646 | Lone Wolf Oil & Gas Co., LLC | Moline, KS 67353 | Oil & Gas Operator | Jan 2025 |
| 2647 | Lone Wolf Oil LLC | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 2648 | Long And Ware Oil, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Jan 2021 |
| 2649 | Long Drilling Company, LLC | Hamilton, KS 66853 | Oil Operator | Jan 2025 |
| 2650 | Long Shot Oil Co. | | Oil Operator | Aug 1997 |
| 2651 | Long, Edwin A. And Glenda | Hamilton, KS 66853 | Oil Operator | Aug 2000 |
| 2652 | Long, Lewis C., A General Partnership | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 2653 | Long, Marshall | Chase, KS 67524 | Oil Operator | Mar 1986 |
| 2654 | Longhorn Crude, LLC | Jetmore, KS 67854 | Oil Operator | Jan 2025 |
| 2655 | Longhorn Energy | | Oil & Gas Operator | Jun 1991 |
| 2656 | Longhorn Oil & Gas | | Oil Operator | Jan 2025 |
| 2657 | Longhorn Propert | | Oil Operator | Feb 1989 |
| 2658 | Longton Explorat | | Oil & Gas Operator | Jul 1993 |
| 2659 | Longton Explorations | | Oil & Gas Operator | Dec 2024 |
| 2660 | Lonny Bruce Operations, L.L.C. | McPherson, KS 67460 | Oil & Gas Operator | Apr 2009 |
| 2661 | Lorenz, Barton T. | Cherryvale, KS 67335 | Oil & Gas Operator | Jul 2013 |
| 2662 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 2663 | Lorenzen Oil Company, Inc. | O?Fallon, MO 63368 | Oil Operator | Nov 2024 |
| 2664 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Jan 2025 |
| 2665 | Louis Dreyfus Natural Gas Corp. | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2015 |
| 2666 | Loveland Energy LLC | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 2667 | Lowry Exploratio | | Oil Operator | May 1994 |
| 2668 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2025 |
| 2669 | Loyd, John H. | Warrensburg, MO 64903 | Oil Operator | Aug 2000 |
| 2670 | Lozoya, Jesus Antonio | Coldwater, KS 67029 | Oil & Gas Operator | Jan 2025 |
| 2671 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 2672 | LRC Development Corporation | Hays, KS 67601 | Oil Operator | Mar 2009 |
| 2673 | LRR Partnership | | Oil Operator | Sep 2023 |
| 2674 | Lucky Crude, LLC | Erie, KS 66733 | Oil Operator | Dec 2024 |
| 2675 | Lucky Iron | | Oil Operator | Jan 2025 |
| 2676 | Ludco Incorporat | | Gas Operator | Mar 1990 |
| 2677 | Luff Exploration Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2025 |
| 2678 | Lutz, Jerry | Reed City, MI 49677 | Gas Operator | Apr 1987 |
| 2679 | Lutz, Lisa Morgan | Fayetteville, AR 72702 | Oil Operator | Jan 2025 |
| 2680 | Lutz, Scott T. Trust | Fayetteville, AR 72702 | Oil Operator | Mar 2011 |
| 2681 | Lutz, Scott Thomas, Estate Of | Fayetteville, AR 72703 | Oil Operator | Aug 1996 |
| 2682 | Lutz, Thomas C. | | Oil Operator | Dec 2009 |
| 2683 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 2684 | Lyon Oil Company | | Oil Operator | Mar 1985 |
| 2685 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2025 |
| 2686 | Lyons, Clarence Jr. | Chanute, KS 66720 | Oil Operator | Dec 2024 |
| 2687 | M & B Well Servi | | Oil Operator | Aug 1990 |
| 2688 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
| 2689 | M & C Oil Incorp | | Oil Operator | Mar 1995 |
| 2690 | M & D Oil And Gas, LLC | Sterling, KS 67579 | Oil Operator | Jan 2025 |
| 2691 | M & D Oil Co, A General Partnership | Beaver, OK 73932 | Gas Operator | Oct 2022 |
| 2692 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | May 2025 |
| 2693 | M & L Oil Compan | | Oil Operator | Jun 1993 |
| 2694 | M & M Contractin | | Oil Operator | Mar 1992 |
| 2695 | M & M Exploration, Inc. | Westminster, CO 80031 | Oil & Gas Operator | Mar 2025 |
| 2696 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Jan 2025 |
| 2697 | M & M Well Service, LLC | Medicine Lodge, KS 67104 | Gas Operator | Jan 2025 |
| 2698 | M & O Oil Co.A General Partnership | Fredonia, KS 66736 | Oil Operator | Dec 2024 |
| 2699 | M & S Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2019 |
| 2700 | M & W Oil LLC | Hamilton, KS 66853 | Oil Operator | Nov 2015 |