| 1 | R & B Operating LLC | Boynton, OK 74422 | Oil & Gas Operator | Mar 2025 |
| 2 | R & B Trucking | Crescent, OK 73028-0775 | Oil & Gas Operator | Nov 2021 |
| 3 | R B Energy Inc | Manchester, KY 40962 | Oil & Gas Operator | Jan 2015 |
| 4 | R L Clampitt & Associates LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2026 |
| 5 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | Jun 2026 |
| 6 | R3 Resources Operating Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Apr 2026 |
| 7 | Rafter H Operating LLC | El Reno, OK 73036 | Oil & Gas Operator | Mar 2026 |
| 8 | Rainbo Service Company | Oklahoma City, OK 73129 | Oil & Gas Operator | Mar 2026 |
| 9 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 10 | Ramco Energy Corporation | FT. Lauderdale, FL 33312 | Oil & Gas Operator | Dec 2008 |
| 11 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 12 | Ramsey Property Management LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2026 |
| 13 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 14 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2026 |
| 15 | Ray G H Oil Company | Chickasha, OK 73023-0650 | Oil Operator | Feb 2010 |
| 16 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 17 | RDH Enterprises Inc | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 18 | Real Production Management LLC | Tulsa, OK 74103 | Oil Operator | Oct 2025 |
| 19 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Apr 2026 |
| 20 | Red River Oil & Gas Company | Oklahoma City, OK 73132-5120 | Oil & Gas Operator | Mar 2015 |
| 21 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | Apr 2026 |
| 22 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2024 |
| 23 | Revolution Resources LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2023 |
| 24 | Richland Resources Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2026 |
| 25 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 26 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 27 | Rif Raf Inc | Norman, OK 73069 | Oil Operator | May 1999 |
| 28 | Rimrock Resource Operating LLC | Tulsa, OK 74103-4462 | Oil & Gas Operator | Apr 2026 |
| 29 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 30 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Apr 2026 |
| 31 | RL&B Energy LLC | Wichita Falls, TX 76230 | Oil & Gas Operator | Mar 2026 |
| 32 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 33 | Robertson Johnie J | Okmulgee, OK 74447-8765 | Oil & Gas Operator | Mar 2026 |
| 34 | Robinson Brothers Drilling Co | | Oil & Gas Operator | Jul 2002 |
| 35 | Rockwell Energy Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2014 |
| 36 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 37 | Roka Management Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Apr 2026 |
| 38 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Apr 2026 |
| 39 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Jun 2026 |
| 40 | Rush-Andrus Engineering | Royse City, TX 75189-1210 | Oil & Gas Operator | Feb 2022 |