| 1 | R & B Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 2 | R & B Trucking | Crescent, OK 73028-0775 | Oil & Gas Operator | Nov 2021 |
| 3 | R & H Production LLC | Cement, OK 73017-0503 | Oil & Gas Operator | Oct 2021 |
| 4 | R B Energy, Inc | Manchester, KY 40962 | Oil & Gas Operator | Jan 2015 |
| 5 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 6 | R L Clampitt & Associates LLC | Bartlesville, OK 74006-3313 | Oil & Gas Operator | Feb 2024 |
| 7 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | Apr 2024 |
| 8 | Rafter H Operating LLC | El Reno, OK 73036-2714 | Oil & Gas Operator | Jan 2024 |
| 9 | Rainbo Service Company | Oklahoma City, OK 73123-2177 | Oil & Gas Operator | Feb 2024 |
| 10 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 11 | Ramco Energy Corporation | FT. Lauderdale, FL 33312 | Oil & Gas Operator | Dec 2008 |
| 12 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 13 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jan 2024 |
| 14 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 15 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |
| 16 | Ray G H Oil Company | Chickasha, OK 73023-0650 | Oil Operator | Feb 2010 |
| 17 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 18 | RDH Enterprises, Inc. | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 19 | Real Production Management LLC | | Oil Operator | Jan 2024 |
| 20 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 21 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Feb 2024 |
| 22 | Red River Oil & Gas Company | Oklahoma City, OK 73132-5120 | Oil & Gas Operator | Mar 2015 |
| 23 | Red Wolf Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 24 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 25 | Revolution Resources LLC | | Oil & Gas Operator | Jun 2023 |
| 26 | Richland Resources Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2024 |
| 27 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 28 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 29 | Rif Raf Inc | Norman, OK 73069 | Oil Operator | May 1999 |
| 30 | Rimrock Resource Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 31 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 32 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2024 |
| 33 | RL&B Energy LLC | | Oil & Gas Operator | Feb 2024 |
| 34 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 35 | Robertson Johnie J | Okmulgee, OK 74447-8765 | Oil & Gas Operator | Jan 2024 |
| 36 | Robinson Brothers Drilling Co | | Oil & Gas Operator | Jul 2002 |
| 37 | Rockwell Energy Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2014 |
| 38 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 39 | Roka Management Inc | | Oil & Gas Operator | Jan 2024 |
| 40 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Feb 2024 |
| 41 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 42 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Apr 2024 |
| 43 | Rush-Andrus Engineering | Royse City, TX 75189 | Oil & Gas Operator | Feb 2022 |