| 1 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 2 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 3 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 4 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 5 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 6 | Ratliff City Trucking Inc | Ratliff City, OK 73481-9603 | Oil & Gas Operator | Feb 2018 |
| 7 | Raw Crude Oil & Gas, L.L.C. | Norman, OK 73069 | Oil & Gas Operator | Jul 2025 |
| 8 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2025 |
| 9 | RDH Enterprises, Inc. | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 10 | Rebellion Energy LLC | Tulsa, OK 74135-6241 | Oil & Gas Operator | Jun 2022 |
| 11 | Red Eagle Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2005 |
| 12 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Jul 2025 |
| 13 | Red Mountain Operating LLC | Oklahoma City, OK 73118-1253 | Oil & Gas Operator | Apr 2024 |
| 14 | Red Rock Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2015 |
| 15 | Red Rock Resources, L.L.C. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2025 |
| 16 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | Jul 2025 |
| 17 | Redgate Petroleum Inc | Waynoka, OK 73860-9408 | Oil & Gas Operator | Mar 2014 |
| 18 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2025 |
| 19 | Redline Energy LLC | Dover, OK 73734 | Oil & Gas Operator | Jul 2025 |
| 20 | Reeder Energy Operating LLC | Dallas, TX 75206-4085 | Oil & Gas Operator | Dec 2021 |
| 21 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 22 | Resolute Wyoming Inc | Denver, CO 80203 | Oil & Gas Operator | May 2018 |
| 23 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 24 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Jun 2025 |
| 25 | Richard W Thompson Inc | Plano, TX 75075 | Oil & Gas Operator | Jul 2019 |
| 26 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 27 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 28 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 29 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Jul 2025 |
| 30 | RKR Exploration Inc | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 31 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
| 32 | Roff Operating Company LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 33 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Oct 2025 |
| 34 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Oct 2025 |
| 35 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 36 | Rush-Andrus Engineering | Royse City, TX 75189-1210 | Oil & Gas Operator | Feb 2022 |
| 37 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Jul 2025 |