| 1 | R & S Energy Company | Luling, TX 78648 | Oil & Gas Operator | Dec 2010 |
| 2 | R & S Oil Production Co. | Luling, TX 78648 | Oil & Gas Operator | Apr 2026 |
| 3 | Rafter L Resources, LLC | Bulverde, TX 78163 | Oil Operator | Apr 2026 |
| 4 | Rainer Energy, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2026 |
| 5 | Rampage Exploration, Inc. | Austin, TX 78737 | Oil & Gas Operator | Apr 2026 |
| 6 | Ratex Energy Inc. | Manchaca, TX 78652 | Oil & Gas Operator | Sep 2002 |
| 7 | Rayalto Oil & Gas, Inc. | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2004 |
| 8 | RBR Operating, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2026 |
| 9 | Rec Well Service, Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2008 |
| 10 | Recoil Resources Operating, Inc. | Houston, TX 77046 | Oil & Gas Operator | Mar 2024 |
| 11 | Red Fork Production, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jan 2026 |
| 12 | Red Horse Petroleum | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 13 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 14 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Apr 2026 |
| 15 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Apr 2026 |
| 16 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2026 |
| 17 | Ress Production Co. | Farmington, NM 87499 | Oil & Gas Operator | Apr 2026 |
| 18 | Rexcom, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2026 |
| 19 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 20 | Rickaway Energy, Corp. | Pleasanton, TX 78064 | Oil & Gas Operator | Apr 2026 |
| 21 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2026 |
| 22 | Riggs, Don R. | San Antonio, TX 78270 | Oil & Gas Operator | Aug 2003 |
| 23 | Riley Exploration, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Apr 2026 |
| 24 | Rio Grand Exploration, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2026 |
| 25 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2026 |
| 26 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2026 |
| 27 | Rocc Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Apr 2026 |
| 28 | Rockland Oil Company | Addison, TX 75001 | Oil & Gas Operator | Jan 2026 |
| 29 | Rodenberg, Laura Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Apr 2026 |
| 30 | Rollert Co., Inc., The | Luling, TX 78648 | Oil & Gas Operator | Nov 2000 |
| 31 | Roma Oil And Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2026 |
| 32 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 33 | Ross Gas And Oil, LTD. Co. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Apr 2026 |
| 34 | Royko Oil Company | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Apr 2026 |
| 35 | RR Ventures Limited Partnership | San Antonio, TX 78239 | Oil & Gas Operator | Apr 2026 |
| 36 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |