| 1 | R.E.D. Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2004 |
| 2 | Ramco Operating Company | Tulsa, OK 74135 | Oil & Gas Operator | Jan 1998 |
| 3 | Ramsey & Gassaway | Borger, TX 79008 | Gas Operator | Jun 1999 |
| 4 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2026 |
| 5 | Reneau Oil Co. | Shamrock, TX 79079 | Oil & Gas Operator | Sep 2026 |
| 6 | Reneau, James R. | Shamrock, TX 79079 | Gas Operator | Oct 2001 |
| 7 | Reneau, James Seed Co. | Shamrock, TX 79079 | Oil & Gas Operator | Sep 2026 |
| 8 | Residual Flow Operating, LLC | | Oil Operator | Sep 2026 |
| 9 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2026 |
| 10 | Rhyne, J.V. | Cisco, TX 76437 | Oil & Gas Operator | Sep 2026 |
| 11 | Richland Resources Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2026 |
| 12 | Ricon Petroleum Company | Shamrock, TX 79079 | Oil & Gas Operator | Mar 2008 |
| 13 | Rimrock Gas Company | Weatherford, OK 73096 | Oil & Gas Operator | May 2008 |
| 14 | Rio Grande Drilling Company | San Antonio, TX 78212 | Oil & Gas Operator | Dec 1999 |
| 15 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Sep 2026 |
| 16 | Rki Energy Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2021 |
| 17 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2026 |
| 18 | Rock Oil Resources LLC | Titusville, PA 16354 | Oil Operator | Dec 2025 |
| 19 | Romines & Warner | Pampa, TX 79065 | Oil & Gas Operator | Jan 2002 |
| 20 | Romines Operating Group | Pampa, TX 79066 | Oil & Gas Operator | Nov 2022 |
| 21 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 22 | Rover Petroleum Operating, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2026 |
| 23 | Roy Production Co. | Shamrock, TX 79079 | Oil & Gas Operator | Jul 2012 |
| 24 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |