| 1 | R & A Moore, Inc. | Cleburne, TX 76033 | Oil & Gas Operator | Jun 2025 |
| 2 | R E Blaik Inc | Edmond, OK 73013-6675 | Oil & Gas Operator | Mar 2025 |
| 3 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Mar 2025 |
| 4 | Ramco Energy Corporation | FT. Lauderdale, FL 33312 | Oil & Gas Operator | Dec 2008 |
| 5 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 6 | Ramsey Engineering Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 1993 |
| 7 | Ramsey Nichols Operating Company LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2025 |
| 8 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Dec 2024 |
| 9 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 10 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 11 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 12 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 13 | Ray G H Oil Company | Chickasha, OK 73023-0650 | Oil Operator | Feb 2010 |
| 14 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2025 |
| 15 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 16 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Mar 2025 |
| 17 | Redline Energy LLC | Dover, OK 73734 | Oil & Gas Operator | Mar 2025 |
| 18 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 19 | Reeder Energy Operating LLC | Dallas, TX 75206-4085 | Oil & Gas Operator | Dec 2021 |
| 20 | Remnant Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2025 |
| 21 | Republic Energy Inc. | Decatur, TX 76234 | Oil & Gas Operator | Dec 2016 |
| 22 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 23 | Resource Dev Technology LLC | Morrison, CO 80465-5020 | Oil & Gas Operator | Jan 2017 |
| 24 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2025 |
| 25 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Feb 2025 |
| 26 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 27 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 28 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Mar 2025 |
| 29 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 30 | Ross Curtis | Ada, OK 74820-1354 | Oil & Gas Operator | Feb 2012 |
| 31 | Royal Petroleum | Baytown, TX 77521 | Oil & Gas Operator | Aug 2003 |
| 32 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Jun 2025 |
| 33 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Feb 2025 |
| 34 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |