| 1 | L & B Oil Company Inc | Houston, TX 77019-3115 | Oil & Gas Operator | Dec 2023 |
| 2 | L & F Oil Company | Duncan, OK 73533-3636 | Oil Operator | Jun 2009 |
| 3 | L & T Disposal LLC | Wilson, OK 73463-6545 | Oil Operator | Mar 2016 |
| 4 | L E Jones Operating Inc | Duncan, OK 73534 | Oil & Gas Operator | Feb 2024 |
| 5 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 6 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 7 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2024 |
| 8 | Lambert Company LLC | Healdton, OK 73438-0962 | Oil & Gas Operator | Jan 2024 |
| 9 | Lambert Company The | Healdton, OK 73438-0962 | Oil & Gas Operator | Feb 2023 |
| 10 | Lamima Corporation | Ardmore, OK 73401 | Oil Operator | Nov 1994 |
| 11 | Langley Harold | Graham, OK 73437-0097 | Oil Operator | Feb 2024 |
| 12 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2023 |
| 13 | Larson Exploration Company | Tulsa, OK 74136-4939 | Oil & Gas Operator | Jul 2016 |
| 14 | Lavrco Energie Inc | Duncan, OK 73533 | Oil & Gas Operator | Jan 2024 |
| 15 | Lawrence Hot Oil Service | Loco, OK 73442-0002 | Oil & Gas Operator | Feb 2024 |
| 16 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 17 | Le Norman Partners LLC | Duncan, OK 73533-9523 | Oil & Gas Operator | Feb 2012 |
| 18 | Leg Up Operating Company LLC | | Oil Operator | Jan 2024 |
| 19 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Dec 2023 |
| 20 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2024 |
| 21 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |
| 22 | Lewis James D Oil Company | Healdton, OK 73438-0626 | Oil Operator | Feb 2024 |
| 23 | Lewis Oil Operations LLC | Ratliff City, OK 73481-0220 | Oil & Gas Operator | Feb 2024 |
| 24 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 25 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 26 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 27 | Lincoln Rock Corporation | Northfield, IL 60093 | Oil & Gas Operator | Jul 2003 |
| 28 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Feb 2024 |
| 29 | Little O Oil Company | Velma, OK 73091-0425 | Oil & Gas Operator | Apr 2015 |
| 30 | Locators Oil And Gas Inc | Guthrie, OK 73044-0130 | Oil & Gas Operator | Oct 2022 |
| 31 | Lorentz Oil & Gas LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2024 |
| 32 | LTJ Enterprises LLC | | Oil Operator | Jan 2024 |
| 33 | Lucky Oil Company | Comanche, OK 73529-0009 | Oil Operator | Feb 2024 |
| 34 | LX4 LLC | | Oil Operator | Jan 2024 |