| 1 | R & P Operating | Tuscola, TX 79562 | Oil & Gas Operator | Jun 1997 |
| 2 | Rampart Petroleum, Incorporated | Buffalo Gap, TX 79508 | Oil & Gas Operator | Jan 2009 |
| 3 | Rasbury | Clyde, TX 79510 | Oil Operator | Mar 2025 |
| 4 | Ratts, Robert V. Inc. | Bedford, TX 76021 | Oil & Gas Operator | Aug 2003 |
| 5 | Rayco Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 6 | Raymond, WM. C. | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2025 |
| 7 | Red-Tex Petroleum, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Aug 2003 |
| 8 | Redbud E & P, Inc. | Spring, TX 77379 | Oil & Gas Operator | Mar 2025 |
| 9 | Redmon Oil Company, Inc., The | Plano, TX 75023 | Oil & Gas Operator | Mar 2025 |
| 10 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 11 | Regions Energy LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2016 |
| 12 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2025 |
| 13 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 14 | Renegade Operating Company, LLC | Abilene, TX 79608 | Oil Operator | Oct 2006 |
| 15 | RHB Exploration & Production,LLC | Grapevine, TX 76099 | Oil & Gas Operator | Mar 2025 |
| 16 | Rhodes Drilling Company | Abilene, TX 79608 | Oil & Gas Operator | Sep 2000 |
| 17 | Richardson Resources Inc | Brownwood, TX 76801 | Oil & Gas Operator | Mar 2025 |
| 18 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 19 | Richmond Drilling Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 20 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 21 | Riptide Energy LLC | Austin, TX 78701 | Oil & Gas Operator | Mar 2025 |
| 22 | RMB Operating LLC | Lubbock, TX 79493 | Oil & Gas Operator | Mar 2025 |
| 23 | Robertson Resources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 24 | Robertson, French M. Oil Co. | Abilene, TX 79608 | Oil & Gas Operator | Mar 1995 |
| 25 | Roco Petroleum, Incorporated | Abilene, TX 79605 | Oil & Gas Operator | Mar 2025 |
| 26 | Ross Engineering, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2025 |
| 27 | Rover Petroleum Operating, LLC | Plano, TX 75075 | Oil & Gas Operator | Mar 2025 |
| 28 | Royal Texas Petroleum | Lago VIsta, TX 78645 | Oil & Gas Operator | Mar 2025 |
| 29 | Rozzlle Operating Company, LLC | Blackwell, TX 79506 | Oil & Gas Operator | Mar 2025 |
| 30 | Rust Oil Corp. | Fort Worth, TX 76108 | Oil & Gas Operator | Mar 2025 |