| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H2ox Operating LLC | Oil Operator | Feb 2024 | |
| 2 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 3 | Ham Oil Company, LLC | Oil Operator | Sep 2022 | |
| 4 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 5 | Helton Oil Company | Edmond, OK 73083-7283 | Oil & Gas Operator | Aug 2016 |
| 6 | Henderson Don Inc | Oklahoma City, OK 73134-1753 | Oil & Gas Operator | Aug 2013 |
| 7 | Henderson Fred J | Okmulgee, OK 74447-9204 | Oil & Gas Operator | Feb 2024 |
| 8 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 9 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 10 | Hy-Carb Energy Inc | Oil & Gas Operator | Feb 2009 |