| 1 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2026 |
| 2 | R E Blaik Inc | Edmond, OK 73013-6675 | Oil & Gas Operator | Feb 2026 |
| 3 | Radford Dale | Konawa, OK 74849 | Oil & Gas Operator | Jan 2026 |
| 4 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 5 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 6 | Ramsey Property Management LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2026 |
| 7 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 8 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 9 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 10 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2026 |
| 11 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 12 | RDH Enterprises Inc | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 13 | Red Bluff Resources Operating LLC | Oklahoma City, OK 73112-5468 | Oil & Gas Operator | Feb 2026 |
| 14 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Mar 2026 |
| 15 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103 | Oil & Gas Operator | Mar 2026 |
| 16 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | Mar 2026 |
| 17 | Redgate Petroleum Inc | Waynoka, OK 73860-9408 | Oil & Gas Operator | Mar 2014 |
| 18 | Redland Resources LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Mar 2026 |
| 19 | Redline Energy LLC | Dover, OK 73734 | Oil & Gas Operator | Mar 2026 |
| 20 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 21 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2026 |
| 22 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Feb 2026 |
| 23 | Revolution Resources III, LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 24 | Richard W Thompson Inc | Plano, TX 75075 | Oil & Gas Operator | Jul 2019 |
| 25 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 26 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2026 |
| 27 | Rives Owen H | Holdenville, OK 74848-0913 | Oil & Gas Operator | Nov 2000 |
| 28 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 29 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Mar 2026 |
| 30 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 31 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Mar 2026 |
| 32 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 33 | Roberts Zetau J Fisk | Moore, OK 73160 | Oil & Gas Operator | Sep 1993 |
| 34 | Ross Curtis | Ada, OK 74820-1354 | Oil & Gas Operator | Feb 2012 |
| 35 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Jun 2026 |
| 36 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Feb 2026 |
| 37 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Feb 2026 |