| 1 | R & D Oil & Gas | Exeter, CA 93221-9697 | Oil & Gas Operator | Aug 2019 |
| 2 | R D T Properties | Tulsa, OK 74105-7122 | Oil & Gas Operator | Sep 2017 |
| 3 | R E C Tulsa Corporation | Oklahoma City, OK 73107 | Oil & Gas Operator | Apr 2014 |
| 4 | R&R Production Company, LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2025 |
| 5 | Rahmco Oil And Gas Co Inc | Ponca City, OK 74604-5155 | Oil & Gas Operator | Jan 2013 |
| 6 | Rainbow End Ranch | Okemah, OK 74859-9733 | Oil & Gas Operator | Apr 2020 |
| 7 | Rainbow Oilwell Service Inc | Depew, OK 74028 | Oil & Gas Operator | Jul 2024 |
| 8 | Ram Energy LLC | Tulsa, OK 74152 | Oil & Gas Operator | Jun 2025 |
| 9 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Jun 2025 |
| 10 | Ramey L E SR | Mounds, OK 74047 | Oil Operator | Jan 2000 |
| 11 | Ramey Oil Corporation | Kiefer, OK 74041-0699 | Oil & Gas Operator | May 2025 |
| 12 | Ramey Sharp N Glenn SD Unit | Tulsa, OK 74120 | Oil Operator | Nov 1998 |
| 13 | Ramey Wayne | Mounds, OK 74047 | Oil & Gas Operator | Mar 2025 |
| 14 | Rampage Energy Inc | Bristow, OK 74010-6415 | Oil & Gas Operator | Apr 2020 |
| 15 | Randy Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 16 | Raper Brice Oil Company LLC | Yale, OK 74085-6865 | Oil & Gas Operator | Apr 2015 |
| 17 | Ravil Inc | Edmond, OK 73013 | Gas Operator | Nov 1998 |
| 18 | RBC Exploration Company | Tulsa, OK 74114 | Oil & Gas Operator | May 2013 |
| 19 | RCK Oil And Gas LLC | Denton, TX 76207 | Oil & Gas Operator | Jun 2025 |
| 20 | RDH Enterprises, Inc. | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 21 | Red Fork Oil Production Inc | Mannford, OK 74044-0492 | Oil & Gas Operator | Feb 2017 |
| 22 | Red Fork Production, LLC | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 23 | Red River Fuels Inc | Bristow, OK 74010-2231 | Oil & Gas Operator | Mar 2008 |
| 24 | Red Stone Resources LLC | Edmond, OK 73013 | Oil Operator | Jun 2023 |
| 25 | Reddy Oil & Gas Corporation | Tulsa, OK 74108-5105 | Oil & Gas Operator | Jun 2025 |
| 26 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Jun 2025 |
| 27 | Redtail Investments LLC | Oklahoma City, OK 73179 | Oil & Gas Operator | Jun 2025 |
| 28 | Regency Petroleum Inc | Jones, OK 73049-8724 | Oil & Gas Operator | Mar 1999 |
| 29 | Reliable Oil Industries Inc | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2024 |
| 30 | Remco Energy Corporation | Independence, MO 64055 | Oil & Gas Operator | Nov 2009 |
| 31 | Reserve Exploration Co. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2007 |
| 32 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2025 |
| 33 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | May 2025 |
| 34 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 35 | Reynolds J W & Associates | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2000 |
| 36 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 37 | Rhodes-Fielding Corporation | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 38 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 39 | Richart Oil Company Inc | Oklahoma City, OK 73154-0631 | Oil & Gas Operator | Aug 1995 |
| 40 | Richland Resources Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2025 |
| 41 | Rick Pulliam Oil & Gas Inc | Bristow, OK 74010 | Oil & Gas Operator | May 2025 |
| 42 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 43 | Roberson, Joe | Vernon, TX 76385 | Oil & Gas Operator | Feb 2015 |
| 44 | Robinowitz Oil Company | Tulsa, OK 74136-1429 | Oil & Gas Operator | Feb 2023 |
| 45 | Robson & Shults Prod Corp | Mannford, OK 74044 | Oil & Gas Operator | Jun 1995 |
| 46 | Rock Oil Company | Broken Arrow, OK 74014-6106 | Oil & Gas Operator | May 2025 |
| 47 | Rocky Roads Operating LLC | Tulsa, OK 74103-4048 | Oil & Gas Operator | Jun 2025 |
| 48 | Roe Oil Company | Cushing, OK 74023-0086 | Oil & Gas Operator | Feb 2025 |
| 49 | Rogers Jerry L | Cushing, OK 74023-0911 | Oil & Gas Operator | Mar 2017 |
| 50 | Ron & Dan'S Oil LTD | Barnsdall, OK 74002-0628 | Oil & Gas Operator | May 2011 |
| 51 | Rongey Ira E | Sapulpa, OK 74066-9317 | Oil & Gas Operator | May 2013 |
| 52 | Rongey Oil | Jenks, OK 74037-3621 | Oil & Gas Operator | Jan 2013 |
| 53 | Rose Operating Company | Tulsa, OK 74101-2391 | Oil & Gas Operator | Dec 2014 |
| 54 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | May 2025 |
| 55 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 56 | Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Jun 2025 |
| 57 | Rover Operating, LLC | Chicago, IL 60606 | Oil & Gas Operator | May 2025 |
| 58 | Rowe Energy | Beggs, OK 74421-0240 | Oil & Gas Operator | Mar 2015 |
| 59 | Rowe Stephen Oil Properties LLC | Hunt, TX 78024 | Oil & Gas Operator | Apr 2020 |
| 60 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Jun 2025 |
| 61 | Roy G Oil Company | Drumright, OK 74030-1236 | Oil & Gas Operator | Oct 1995 |
| 62 | Roy L Ashton Oil & Gas Production Inc | Sapulpa, OK 74066 | Oil Operator | May 2025 |
| 63 | Royal Energy Resources LTD | Denver, CO 80221 | Oil & Gas Operator | May 2013 |
| 64 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 65 | Royalty Energy Development LLC | Edmond, OK 73003 | Oil & Gas Operator | Jun 2025 |
| 66 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Sep 2025 |