| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | R & B Oil Company, LLC Of Texas | Oil & Gas Operator | Jan 2025 | |
| 2 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 3 | Raptor Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 4 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 5 | Republic Petroleum Corp. | Oil & Gas Operator | Nov 1977 | |
| 6 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | Sep 2018 |
| 7 | Richard A. Williams Expl Corp. | Oil & Gas Operator | Dec 1983 | |
| 8 | Rollar Oil Co., Inc. | Oil & Gas Operator | Jul 1999 | |
| 9 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |