| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Imperial Petroleum Inc | Evansville, IN 47725 | Oil & Gas Operator | Jan 2005 |
| 2 | Imperium Energy Inc | Atlanta, TX 75551 | Oil & Gas Operator | Aug 2025 |
| 3 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 4 | Indrex Inc | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2000 |
| 5 | Inland Oil Corporation | Sapulpa, OK 74067 | Oil & Gas Operator | Sep 2025 |
| 6 | Internorth Inc | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
| 7 | Investment Operating Co | Stillwater, OK 74075-8572 | Oil Operator | Aug 2025 |
| 8 | Iron Sights Operating, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |