| 1 | R & B Oil Company, LLC | Willis, TX 77318 | Oil & Gas Operator | Mar 2025 |
| 2 | R W Ranch | San Antonio, TX 78211 | Oil Operator | Mar 2025 |
| 3 | R-A-R Interests | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2003 |
| 4 | Ragars Oil & Gas Co. | Austin, TX 78716 | Oil & Gas Operator | Mar 2025 |
| 5 | Rainer Energy, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2025 |
| 6 | Ralyn Corp. | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 2025 |
| 7 | Rampage Exploration, Inc. | Austin, TX 78737 | Oil & Gas Operator | Mar 2025 |
| 8 | Raol Company, The | Natalia, TX 78059 | Oil & Gas Operator | Mar 2025 |
| 9 | Ray Jr. Co., Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 2025 |
| 10 | Rec Well Service, Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2008 |
| 11 | Rec, LLC | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 2025 |
| 12 | Recoil Resources Operating, Inc. | Houston, TX 77046 | Oil & Gas Operator | Mar 2024 |
| 13 | Red Chalk Resources LLC | Houston, TX 77218 | Oil Operator | Mar 2025 |
| 14 | Redman Operating Company | Houston, TX 77042 | Oil & Gas Operator | May 2008 |
| 15 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 16 | Regency Energy, Inc. | Crystal City, TX 78839 | Oil & Gas Operator | Mar 2025 |
| 17 | Reh Energy, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Mar 2025 |
| 18 | Repsol Eagle Ford North, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jul 2023 |
| 19 | Repsol Oil & Gas USA, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Mar 2025 |
| 20 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 21 | Rickaway Energy, Corp. | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 2025 |
| 22 | Ridgemar Energy Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 23 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2025 |
| 24 | Rio Exploration Company | San Antonio, TX 78209 | Gas Operator | Dec 2005 |
| 25 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 26 | Rodenberg, Laura Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Mar 2025 |
| 27 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Mar 2025 |
| 28 | Roland Oil Company | Charlotte, TX 78011 | Oil & Gas Operator | Mar 2025 |
| 29 | Rollert Co., Inc., The | Luling, TX 78648 | Oil & Gas Operator | Nov 2000 |
| 30 | Roma Oil And Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2025 |
| 31 | Rosner, S. | San Antonio, TX 78216 | Oil & Gas Operator | Aug 1996 |
| 32 | Royal Production Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 33 | Royal Seahorse Developments Inc | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1994 |
| 34 | RR Ventures Limited Partnership | San Antonio, TX 78239 | Oil & Gas Operator | Mar 2025 |