| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Ralph, C D | Owensboro, KY 42301 | Oil Operator | Dec 2004 |
| 2 | Ravenna Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2021 |
| 3 | Roberts, Oliver M | Oil & Gas Operator | Dec 2021 | |
| 4 | Robinson Engineering & Oil Company, Inc | Evansville, IN 47716 | Oil & Gas Operator | Dec 2022 |