| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H And H Star Energy Inc Dba Petrostar Energy | Oil & Gas Operator | Feb 2004 | |
| 2 | Highmount Midwest Energy LLC | Oil & Gas Operator | Sep 2011 | |
| 3 | Hound Resources LLC | Oil & Gas Operator | Jul 2025 | |
| 4 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |