| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & H Oil Compan | Oil & Gas Operator | Aug 1995 | |
| 2 | H & H Oil Company | Oil & Gas Operator | Feb 2026 | |
| 3 | H & H Oil, LLC | Lincolnville, KS 66858 | Oil Operator | Feb 2026 |
| 4 | Hamby Oil LLC | Ellinwood, KS 67526 | Oil Operator | May 2013 |
| 5 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Feb 2026 |
| 6 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Feb 2026 |
| 7 | Hillenburg Oil Co., A General Partnership | Broken Arrow, OK 74011 | Oil Operator | Feb 2026 |
| 8 | Hodges Oil | Oil Operator | Jan 2026 |