| 1 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | May 2024 |
| 2 | R.C.I. Energy | Alice, TX 78333 | Oil & Gas Operator | May 2024 |
| 3 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 4 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 5 | Rec Well Service, Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2008 |
| 6 | Red Arrow Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | Jul 2016 |
| 7 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 8 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | May 2024 |
| 9 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | May 2024 |
| 10 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | May 2024 |
| 11 | Resource Expl & Prod, Inc. | Salado, TX 76571 | Oil & Gas Operator | May 2024 |
| 12 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 13 | Richey Properties, Inc. | Tyler, TX 75711 | Oil & Gas Operator | May 2024 |
| 14 | Rickaway Energy, Corp. | Pleasanton, TX 78064 | Oil & Gas Operator | May 2024 |
| 15 | Ricochet Energy, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | May 2024 |
| 16 | Ridgemar Energy Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | May 2024 |
| 17 | Riggs, Don R. | San Antonio, TX 78270 | Oil & Gas Operator | Aug 2003 |
| 18 | Riley Exploration Opg Co, LLC | La Grange, TX 78945 | Oil & Gas Operator | May 2024 |
| 19 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | May 2024 |
| 20 | Rio Bravo Royalty Co. | Bandera, TX 78003 | Oil & Gas Operator | Aug 2003 |
| 21 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | May 2024 |
| 22 | Ritchie, H. G. Jr. | Taft, TX 78390 | Oil & Gas Operator | May 2024 |
| 23 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 24 | Roc Operating, Inc. | Plano, TX 75093 | Oil & Gas Operator | Oct 2008 |
| 25 | Rock Creek Oil, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Nov 2019 |
| 26 | Rock Solid Operating, LLC | Southlake, TX 76092 | Oil Operator | Sep 2021 |
| 27 | Roma Oil And Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 2024 |
| 28 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 29 | Royko Oil Company | Horseshoe Bay, TX 78657 | Oil & Gas Operator | May 2024 |