| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Reformation Energy Inc | Oil & Gas Operator | May 1984 | |
| 2 | Robinson Resource Dev. Co.Inc. | Oil & Gas Operator | Oct 1982 | |
| 3 | Roundtree & Associates, Inc. | Oil & Gas Operator | Jun 2024 | |
| 4 | Rover Operating, LLC | Chicago, IL 60606 | Oil & Gas Operator | Aug 2025 |