| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H2ox Operating LLC | Oil Operator | Feb 2024 | |
| 2 | Hall Exploration, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |
| 3 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 4 | Ham Oil Company, LLC | Oil Operator | Sep 2022 | |
| 5 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 6 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 7 | Highmark Energy Operating, LLC | Poynor, TX 75782 | Oil & Gas Operator | Apr 2024 |
| 8 | Hooks Dwain | Tatums, OK 73487-0072 | Oil & Gas Operator | Dec 2023 |
| 9 | Hy-Carb Energy Inc | Oil & Gas Operator | Feb 2009 |