| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Indexgeo & Associates, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2009 |
| 2 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 3 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Oct 2025 |
| 4 | Ironroc Energy | The Woodlands, TX 77381 | Oil & Gas Operator | Oct 2025 |