| 1 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | May 2024 |
| 2 | Rabwin Oil & Gas, Inc. | | Oil & Gas Operator | Nov 1991 |
| 3 | Ralph L. Leaderbrand | | Oil & Gas Operator | Dec 1996 |
| 4 | Rebel Oil Of North Louisiana, LLC | | Oil & Gas Operator | Dec 2007 |
| 5 | Red River Oil & Gas Inc. | | Oil & Gas Operator | May 2012 |
| 6 | Reef Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2007 |
| 7 | Regency Field Services LLC | Dallas, TX 75201 | Oil Operator | Jul 2017 |
| 8 | Regency Intrastate Gas LLC | | Oil Operator | Feb 2009 |
| 9 | Reliance Well Service, Inc. | | Oil & Gas Operator | Apr 1997 |
| 10 | Reliant Energy Field SVS Inc. | | Oil Operator | Sep 2002 |
| 11 | Reynolds Oil Co. | | Oil Operator | Nov 2005 |
| 12 | Richard B. Nelson,Etal | | Oil & Gas Operator | May 1979 |
| 13 | Rising Star 2000 Oil & Gas, Inc. | | Oil Operator | Dec 2023 |
| 14 | Robco Investments, Inc. | | Oil & Gas Operator | Jul 2016 |
| 15 | Rojo Oil Company | McLean, TX 79057 | Oil & Gas Operator | May 2024 |
| 16 | Rosbottom Petroleum | | Oil & Gas Operator | Aug 1988 |
| 17 | Ross & Glenn Petroleum Inc. | | Oil & Gas Operator | Aug 1984 |
| 18 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | May 2024 |