| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | R Cubed L L C | Oil & Gas Operator | Dec 2023 | |
| 2 | Range Michigan LLC | Oil Operator | Dec 2020 | |
| 3 | Reef Petroleum Corp | Oil & Gas Operator | Feb 1994 | |
| 4 | Reefworks LLC | Oil & Gas Operator | Aug 2025 | |
| 5 | Riverside Energy Michigan LLC | Oil & Gas Operator | Jul 2025 | |
| 6 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |