| 1 | R & B Trucking | Crescent, OK 73028-0775 | Oil & Gas Operator | Nov 2021 |
| 2 | R & S Oil Company | Tonkawa, OK 74653 | Oil & Gas Operator | Nov 2013 |
| 3 | R & S Operating | Perry, OK 73077 | Oil & Gas Operator | Jan 2013 |
| 4 | R C Holdings LLC | Garber, OK 73738-5423 | Oil & Gas Operator | Apr 2017 |
| 5 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2024 |
| 6 | R E Blaik Inc | Edmond, OK 73013-6675 | Oil & Gas Operator | Dec 2024 |
| 7 | R E C Tulsa Corporation | Oklahoma City, OK 73107 | Oil & Gas Operator | Apr 2014 |
| 8 | Ra-Jac LLC | Norman, OK 73072 | Oil & Gas Operator | Dec 2024 |
| 9 | Raf Oil Company | Oklahoma City, OK 73120-1944 | Oil & Gas Operator | Jul 2013 |
| 10 | Rahm Oil Company | Enid, OK 73703 | Oil & Gas Operator | Mar 2011 |
| 11 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 12 | Ram Oil & Gas | Blackwell, OK 74631 | Oil & Gas Operator | May 2013 |
| 13 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Dec 2024 |
| 14 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 15 | Rampage Energy Inc | Bristow, OK 74010-6415 | Oil & Gas Operator | Apr 2020 |
| 16 | Ramsey Engineering Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 1993 |
| 17 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 18 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 19 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 20 | Red Fork (USA) Investments Inc | Midland, TX 79710-0272 | Oil & Gas Operator | May 2019 |
| 21 | Red Fork Valley Oil & Gas Co | Cushing, OK 74023 | Oil Operator | Dec 2014 |
| 22 | Reliance Trusts | Dallas, TX 75244 | Oil & Gas Operator | Nov 1995 |
| 23 | Renegade Operating Company | Aurora, CO 80016 | Oil & Gas Operator | Aug 2023 |
| 24 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 25 | Resources Operating Co Inc | Enid, OK 73703-1628 | Oil & Gas Operator | Nov 2024 |
| 26 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Nov 2024 |
| 27 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 28 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 29 | Richard C Sullins Credit Shelter Trust | Perry, OK 73077-3201 | Gas Operator | Nov 2024 |
| 30 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 31 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 32 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Dec 2024 |
| 33 | Roberson, Joe | Vernon, TX 76385 | Oil & Gas Operator | Feb 2015 |
| 34 | Rodman Petroleum Corp. | Odessa, TX 79768 | Oil & Gas Operator | Jul 2023 |
| 35 | Ron & Dan'S Oil LTD | Barnsdall, OK 74002-0628 | Oil & Gas Operator | May 2011 |
| 36 | Roth Gary E | Tonkawa, OK 74653-2033 | Oil & Gas Operator | Jan 2020 |
| 37 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 38 | Royalty Petroleum Company | Oklahoma City, OK 73120 | Gas Operator | Feb 2002 |
| 39 | RR Oil Well Operations LLC | Ringwood, OK 73768 | Oil & Gas Operator | Dec 2024 |
| 40 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |