| 1 | L & M Production Inc | Drumright, OK 74030-9801 | Oil & Gas Operator | Dec 2015 |
| 2 | Labo Oil Company Inc | Drumright, OK 74030-5619 | Oil & Gas Operator | Jul 2025 |
| 3 | Lackey Danny | Kiefer, OK 74041-0702 | Oil & Gas Operator | Oct 2022 |
| 4 | Lackey WM Oil & Gas Oper Co | Shawnee, OK 74801 | Oil & Gas Operator | Jan 1994 |
| 5 | Lahoma Production Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2025 |
| 6 | Lakeland Pipeline Inc | Hominy, OK 74035-1006 | Oil & Gas Operator | Jun 2023 |
| 7 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Feb 2026 |
| 8 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Nov 2025 |
| 9 | Lambdin William H | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 1998 |
| 10 | Lamberton Oil Co Inc | Tulsa, OK 74107 | Oil & Gas Operator | May 2013 |
| 11 | Lamberton W J | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2015 |
| 12 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Dec 2025 |
| 13 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 14 | Landmark Operating Company | Welty, OK 74833-3923 | Oil Operator | Aug 2015 |
| 15 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 16 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 17 | Lar-Mie Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1998 |
| 18 | Lariat Energy & Supply Co Inc | Hulbert, OK 74441 | Oil & Gas Operator | Dec 2025 |
| 19 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2024 |
| 20 | Larkin Energy Company Inc | Sasakwa, OK 74867 | Oil & Gas Operator | May 2022 |
| 21 | Larry Wolff Dba Wolff'S Oilfield Service | Cushing, OK 74023-9789 | Oil & Gas Operator | Dec 2025 |
| 22 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 23 | Lasmo Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 24 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 25 | Lauck & Associates | Walnut Creek, CA 91789 | Oil & Gas Operator | Dec 2025 |
| 26 | Lawrence James Oil Prop Inc | Catoosa, OK 74015 | Oil & Gas Operator | Feb 2012 |
| 27 | Layton Oil Co | | Oil Operator | Feb 1994 |
| 28 | LBJ Production Inc | Okmulgee, OK 74447 | Oil Operator | Nov 1998 |
| 29 | LCB Resources LLC | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Dec 2025 |
| 30 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 31 | Leasehold Management Corp | Oklahoma City, OK 73107 | Oil & Gas Operator | Nov 2024 |
| 32 | Leavell Resources Corporation | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 33 | Lee Of Tulsa Oil & Gas Inc | Tulsa, OK 74114-5634 | Oil & Gas Operator | Dec 2021 |
| 34 | Leg Up Operating Company LLC | Tulsa, OK 74135 | Oil Operator | Nov 2025 |
| 35 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Jan 2025 |
| 36 | Leonard Vann | | Oil Operator | Oct 2025 |
| 37 | Levinson Silvan E | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2012 |
| 38 | Lewis A. Hembree Production Company | Shawnee, OK 74801 | Oil & Gas Operator | Nov 2025 |
| 39 | Lewis John L Well Service | Sasakwa, OK 74867 | Oil Operator | May 2013 |
| 40 | Lewis Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 1995 |
| 41 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 42 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Dec 2024 |
| 43 | Lil-Mor Oil Company | Tulsa, OK 74105 | Oil Operator | Dec 2000 |
| 44 | Lincoln 77 Inc | Chanute, KS 66720 | Oil Operator | Dec 2001 |
| 45 | Liston V Dean | Nowata, OK 74048-5200 | Oil & Gas Operator | Nov 2016 |
| 46 | Little Chicago Oil & Gas Inc | Edmond, OK 73034-0809 | Oil & Gas Operator | Dec 2017 |
| 47 | Little Oil Company LLC | Cushing, OK 74023 | Oil Operator | Nov 2025 |
| 48 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Dec 2025 |
| 49 | Little Thunder, LLC | Bartlesville, OK 74003 | Oil Operator | Nov 2025 |
| 50 | Lobar Oil Co LLC | Edmond, OK 73013 | Oil & Gas Operator | Nov 2025 |
| 51 | Loman Linda Gann | Norman, OK 73069-6548 | Oil Operator | Apr 2011 |
| 52 | Long, John P | | Oil & Gas Operator | Nov 2025 |
| 53 | Longhorn Estates & Cattle Co. LLC | Jennings, OK 74038 | Oil Operator | Nov 2025 |
| 54 | Longhurst Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 55 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 56 | Loving Company (The) | Broken Arrow, OK 74014-0001 | Oil & Gas Operator | May 2013 |
| 57 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 58 | Luke Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Dec 2025 |
| 59 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | Nov 2025 |
| 60 | Luther Oil Inc | Cameron Park, CA 95682-8865 | Oil & Gas Operator | Apr 2020 |
| 61 | LVM Oil Production LLC | Yale, OK 74085-6688 | Oil & Gas Operator | Jul 2021 |
| 62 | Lynan Energy Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |