| 1 | R & D Reclaiming LLC | | Oil Operator | Aug 2022 |
| 2 | R A Miller Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2020 |
| 3 | R C Holdings LLC | Garber, OK 73738-5423 | Oil & Gas Operator | Apr 2017 |
| 4 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 5 | R E Blaik Inc | Edmond, OK 73013-6675 | Oil & Gas Operator | Jun 2025 |
| 6 | Ra-Jac LLC | Norman, OK 73072 | Oil & Gas Operator | Jul 2025 |
| 7 | Rafter H Operating LLC | El Reno, OK 73036 | Oil & Gas Operator | Jun 2025 |
| 8 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 9 | Rambler Oil Co | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 1999 |
| 10 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 11 | Rampage Energy Inc | Bristow, OK 74010-6415 | Oil & Gas Operator | Apr 2020 |
| 12 | Ramsey Engineering Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 1993 |
| 13 | Ramsey Nichols Operating Company LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jul 2025 |
| 14 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jul 2025 |
| 15 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 16 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 17 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 18 | Raw Crude Oil & Gas, L.L.C. | Norman, OK 73069 | Oil & Gas Operator | Jul 2025 |
| 19 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 20 | Reading & Bates Petroleum Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2009 |
| 21 | Red Bluff Resources Operating LLC | Oklahoma City, OK 73112-5468 | Oil & Gas Operator | Jun 2025 |
| 22 | Red Eagle Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2005 |
| 23 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Jul 2025 |
| 24 | Red Plains Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2017 |
| 25 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | Jul 2025 |
| 26 | Redfork Operations LLC | Dover, OK 73734 | Oil & Gas Operator | Jul 2025 |
| 27 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2025 |
| 28 | Redline Energy LLC | Dover, OK 73734 | Oil & Gas Operator | Jul 2025 |
| 29 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 30 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 31 | Replay Energy Assets LLC | Oklahoma City, OK 73156 | Oil & Gas Operator | Jul 2025 |
| 32 | Reserve Acquisition Group | Tulsa, OK 74153 | Oil & Gas Operator | Dec 1993 |
| 33 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 34 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Jun 2025 |
| 35 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 36 | Rio Blanco Operating LLC | Victoria, TX 77904 | Oil & Gas Operator | Jun 2025 |
| 37 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 38 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Jul 2025 |
| 39 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 40 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 41 | Robson Resources Inc | Tulsa, OK 74104 | Oil & Gas Operator | May 1998 |
| 42 | Rodman Petroleum Corp. | Odessa, TX 79768 | Oil & Gas Operator | Jul 2023 |
| 43 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Jul 2025 |
| 44 | Royalty Energy Development LLC | Edmond, OK 73003 | Oil & Gas Operator | Jul 2025 |
| 45 | RR Oil Well Operations LLC | Ringwood, OK 73768 | Oil & Gas Operator | Jul 2025 |
| 46 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Oct 2025 |
| 47 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 48 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Jul 2025 |
| 49 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |