| 1 | R & A Moore, Inc. | Cleburne, TX 76033 | Oil & Gas Operator | May 2026 |
| 2 | R.E.D. Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2004 |
| 3 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 4 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 5 | Ranjan, Inc. | Perryton, TX 79070 | Oil & Gas Operator | May 2026 |
| 6 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2026 |
| 7 | Red Earth Oil & Gas, Inc. | Oklahoma City, OK 73159 | Oil & Gas Operator | Oct 2021 |
| 8 | Red Line Company, LTD. | Pampa, TX 79066 | Oil & Gas Operator | May 2026 |
| 9 | Redco Oil & Gas, Inc. | Andrews, TX 79714 | Oil & Gas Operator | May 2026 |
| 10 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 11 | Remnant Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | May 2026 |
| 12 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | May 2026 |
| 13 | Reneau, James Seed Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2026 |
| 14 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2026 |
| 15 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2024 |
| 16 | Riata Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2006 |
| 17 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 18 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 19 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 20 | Rife Energy Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2026 |
| 21 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | May 2026 |
| 22 | Rig Petroleum, LLC | Spearman, TX 79081 | Oil & Gas Operator | May 2026 |
| 23 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | May 2026 |
| 24 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Mar 2026 |
| 25 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | May 2026 |
| 26 | Robin Of Perryton Corporation | Perryton, TX 79070 | Oil & Gas Operator | May 2026 |
| 27 | Robin Of Perryton, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Dec 1995 |
| 28 | Rockford Panhandle, LLC | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2008 |
| 29 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 30 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | May 2026 |
| 31 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | May 2026 |
| 32 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | May 2026 |