| 1 | R & B Trucking | Crescent, OK 73028-0775 | Oil & Gas Operator | Nov 2021 |
| 2 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 3 | R I G Producers Inc | Dewey, OK 74029 | Oil & Gas Operator | Jul 1999 |
| 4 | R L Clampitt & Associates LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Jul 2025 |
| 5 | Rainbo Service Company | Oklahoma City, OK 73129 | Oil & Gas Operator | Jun 2025 |
| 6 | Rainmaker Oil & Gas Corp | Oklahoma City, OK 73112-8883 | Oil & Gas Operator | Apr 2015 |
| 7 | Ram Energy LLC | Tulsa, OK 74152 | Oil & Gas Operator | Jun 2025 |
| 8 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 9 | Ramco Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Feb 2012 |
| 10 | Ramey Wayne | Mounds, OK 74047 | Oil & Gas Operator | Jun 2025 |
| 11 | Ramsey Engineering Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 1993 |
| 12 | Ramsey Nichols Operating Company LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jul 2025 |
| 13 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jul 2025 |
| 14 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 15 | Randy Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 16 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 17 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 18 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 19 | Raper Brice Oil Company LLC | Yale, OK 74085-6865 | Oil & Gas Operator | Apr 2015 |
| 20 | Ratliff City Trucking Inc | Ratliff City, OK 73481-9603 | Oil & Gas Operator | Feb 2018 |
| 21 | Raw Crude Oil & Gas, L.L.C. | Norman, OK 73069 | Oil & Gas Operator | Jul 2025 |
| 22 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2025 |
| 23 | RCK Oil And Gas LLC | Denton, TX 76207 | Oil & Gas Operator | Jun 2025 |
| 24 | Reach Oil And Gas Company Inc | Oklahoma City, OK 73118-1100 | Oil & Gas Operator | Jun 2025 |
| 25 | Red Fork Oil Co | Lakewood, CO 80215 | Oil & Gas Operator | Aug 1993 |
| 26 | Red River Oil & Gas Company | Oklahoma City, OK 73132-5120 | Oil & Gas Operator | Mar 2015 |
| 27 | Red River Oil Corporation | Alvarado, TX 76009-0449 | Oil & Gas Operator | Dec 2016 |
| 28 | Red Rock Resources, L.L.C. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2025 |
| 29 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Jul 2025 |
| 30 | Red Stone Resources LLC | Edmond, OK 73013 | Oil Operator | Jun 2023 |
| 31 | Regal Petroleum Services Inc | Euless, TX 76039-1127 | Oil & Gas Operator | May 2015 |
| 32 | Renegade Oil And Gas LLC | Helena, OK 73741-0162 | Oil & Gas Operator | Dec 2019 |
| 33 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 34 | Research Oil Company Inc | Norman, OK 73070-8776 | Oil & Gas Operator | Aug 2019 |
| 35 | Reserve Exploration Co. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2007 |
| 36 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 37 | Resource Development, Inc. | Stroud, OK 74079 | Oil & Gas Operator | Feb 2007 |
| 38 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 39 | Resource Operations, Inc. | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 40 | Revelation Gas & Oil Oklahoma LLC | Kansas City, KS 66103 | Oil & Gas Operator | Jul 2023 |
| 41 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 42 | RF Operating And Supply Inc | | Oil & Gas Operator | Feb 2013 |
| 43 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 44 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 45 | Rietz John T & Co Inc | | Oil & Gas Operator | Mar 1992 |
| 46 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 47 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 48 | Robinowitz Oil Company | Tulsa, OK 74136-1429 | Oil & Gas Operator | Feb 2023 |
| 49 | Rocky Top Energy LLC | Bartlesville, OK 74003 | Oil & Gas Operator | Sep 2024 |
| 50 | Roe Oil Company | Cushing, OK 74023-0086 | Oil & Gas Operator | Feb 2025 |
| 51 | Rogers Jerry L | Cushing, OK 74023-0911 | Oil & Gas Operator | Mar 2017 |
| 52 | Romax Corporation | Ardmore, OK 73401-8882 | Oil & Gas Operator | Feb 2022 |
| 53 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 54 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 55 | Rover Operating, LLC | Chicago, IL 60606 | Oil & Gas Operator | Jun 2025 |
| 56 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Jul 2025 |
| 57 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |