| 1 | R. W. Ellington, Jr. | | Gas Operator | May 1985 |
| 2 | R. W. Wilson | | Gas Operator | May 1988 |
| 3 | Rabun Resources | | Gas Operator | Jan 2025 |
| 4 | Range Louisiana Operating, LLC | | Oil & Gas Operator | Aug 2020 |
| 5 | Red Rooster Gas Corporation | | Gas Operator | Sep 1993 |
| 6 | Regency Field Services LLC | Dallas, TX 75201 | Oil Operator | Jul 2017 |
| 7 | Regency Gas Gathrng & Proc LLC | | Oil Operator | Sep 2007 |
| 8 | Relco Exploration Co., Inc. | | Gas Operator | Aug 1987 |
| 9 | Reliant Energy Field SVS Inc. | | Oil Operator | Sep 2002 |
| 10 | Republic Gas Gathering Sys Inc | | Oil & Gas Operator | Nov 1981 |
| 11 | Richard T. Perry | | Gas Operator | May 1993 |
| 12 | River City Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 1997 |
| 13 | River Energy Co., Inc. | | Gas Operator | Dec 2012 |
| 14 | Riverstone Energy Operating, LLC | Houston, TX 77090 | Oil & Gas Operator | Mar 2025 |
| 15 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 16 | Roberson Well Service | | Gas Operator | Dec 2024 |
| 17 | Robert G Cox & Assoc La Inc. | | Oil & Gas Operator | Jun 1994 |
| 18 | Rosamond Drilling Co., Inc. | | Gas Operator | Nov 1984 |
| 19 | Rowe, Inc. | | Oil & Gas Operator | Jun 1992 |
| 20 | Roy M. Teel | | Oil & Gas Operator | Nov 1983 |