| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Ranch Oil Company | West Linn, OR 97068 | Oil & Gas Operator | Aug 2025 |
| 2 | RDT Properties, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2012 |
| 3 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Oct 2025 |
| 4 | Ritter, Laber & Associates, Inc. | Williston, ND 58802 | Oil & Gas Operator | May 2025 |
| 5 | Ronald M. Sannes | Oil & Gas Operator | Oct 2016 | |
| 6 | Ryan Exploration, Inc. | Oil & Gas Operator | Mar 2012 |