| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Igleheart Warren | Edmond, OK 73034-8964 | Oil & Gas Operator | Jun 2016 |
| 2 | Ikenberry Herman & Ikenberry | Oil Operator | Jul 1999 | |
| 3 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jun 2025 |
| 4 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 5 | Indianola Oil Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Aug 2000 |
| 6 | Ingersoll Oil Inc | Hominy, OK 74035 | Oil & Gas Operator | Jun 2000 |
| 7 | Ingersoll Rosinbaum Oil Inc | Oil & Gas Operator | Feb 2025 | |
| 8 | Integrated Energy Service Corp | Cleveland, OK 74020 | Oil & Gas Operator | Nov 1998 |
| 9 | Iron Hawk Energy Group Joint Venture | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |