| 1 | R & P Operating | Tuscola, TX 79562 | Oil & Gas Operator | Jun 1997 |
| 2 | R3 Operating Corporation | Denver, CO 80222 | Oil & Gas Operator | Dec 2025 |
| 3 | Railroad Commission Of Texas | Austin, TX 78701 | Oil Operator | Dec 2004 |
| 4 | Rand - Paulson Oil Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Feb 1999 |
| 5 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6 | Ratex Energy Inc. | Manchaca, TX 78652 | Oil & Gas Operator | Sep 2002 |
| 7 | Ray Herring Estate | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 8 | Rayco Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 9 | Raymond, WM. C. | Rockdale, TX 76567 | Oil & Gas Operator | Dec 2025 |
| 10 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 11 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Dec 2025 |
| 12 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 13 | Reneau, Nelda York | Snyder, TX 79549 | Oil & Gas Operator | Dec 2025 |
| 14 | Rhodes Drilling Company | Abilene, TX 79608 | Oil & Gas Operator | Sep 2000 |
| 15 | Rhombus Operating Co., LTD | Littleton, CO 80160 | Oil & Gas Operator | Oct 2025 |
| 16 | Richardson, Bud II | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 17 | Ridglea Energy I, LLC | Spring, TX 77379 | Oil & Gas Operator | Dec 2025 |
| 18 | Rio Exploration Company | San Antonio, TX 78209 | Gas Operator | Dec 2005 |
| 19 | Rister, Dewey | Avoca, TX 79503 | Oil & Gas Operator | Dec 2025 |
| 20 | RMB Operating LLC | Lubbock, TX 79493 | Oil & Gas Operator | Dec 2025 |
| 21 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2025 |
| 22 | Roca Production, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 23 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 24 | Rollo Resources, LLC | Granbury, TX 76049 | Gas Operator | Dec 2025 |
| 25 | Rose Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Feb 2002 |
| 26 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 27 | Ross Engineering, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 28 | Rover Petroleum Operating, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 29 | Royal Texas Petroleum | Lago VIsta, TX 78645 | Oil & Gas Operator | Dec 2025 |
| 30 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 2025 |
| 31 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 32 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 33 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Dec 2025 |