| 1 | R & H LLC | Ardmore, OK 73401-6329 | Oil & Gas Operator | Mar 2015 |
| 2 | R & N Associates | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2025 |
| 3 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 4 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 5 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 6 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 7 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 8 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 9 | Ratex Resources Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2000 |
| 10 | Raven Resources LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jun 2025 |
| 11 | Raw Crude Oil & Gas, L.L.C. | Norman, OK 73069 | Oil & Gas Operator | Jul 2025 |
| 12 | Rawhide Operating, Inc. | New Braunfels, TX 78131 | Oil & Gas Operator | Oct 2025 |
| 13 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Jul 2025 |
| 14 | Redtail Investments LLC | Oklahoma City, OK 73179 | Oil & Gas Operator | Jun 2025 |
| 15 | Regency Exploration Inc | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 1999 |
| 16 | Research Oil Company Inc | Norman, OK 73070-8776 | Oil & Gas Operator | Aug 2019 |
| 17 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | Sep 2018 |
| 18 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Jun 2025 |
| 19 | Richland Resources Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 20 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 21 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 22 | Rja Energy LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2025 |
| 23 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Jul 2025 |
| 24 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 25 | Robson Petroleum Company | Tulsa, OK 74104 | Oil & Gas Operator | Jan 1995 |
| 26 | Rockwell Energy Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2014 |
| 27 | Roka Management Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Jun 2025 |
| 28 | Royalty Energy Development LLC | Edmond, OK 73003 | Oil & Gas Operator | Jul 2025 |
| 29 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Jul 2025 |