| 1 | Raisa II Operating LLC | | Oil & Gas Operator | Mar 2017 |
| 2 | Ram Oil And Gas, Inc. | Walsh, CO 81090 | Oil & Gas Operator | Oct 2025 |
| 3 | Rampart Energy Company | | Oil & Gas Operator | Dec 2024 |
| 4 | Rampike Resources LTD | Denver, CO 80202 | Oil Operator | Jul 2025 |
| 5 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jul 2025 |
| 6 | Ranchers Exploration Partners LLC | | Oil & Gas Operator | Jan 2015 |
| 7 | Recovery Energy Inc | | Oil & Gas Operator | Jan 2014 |
| 8 | Red Hawk Petroleum LLC | | Oil & Gas Operator | Mar 2025 |
| 9 | Red Mesa Holdings/O&G LLC | | Oil & Gas Operator | Nov 2014 |
| 10 | Red Mountain Energy LLC | | Oil & Gas Operator | Sep 2017 |
| 11 | Red Mountain Resources LLC | | Oil & Gas Operator | Sep 2023 |
| 12 | Red Oak Operating, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Dec 2024 |
| 13 | Red River Ranch Holdings LLC | | Gas Operator | Jan 2015 |
| 14 | Red Willow Production Company | | Oil & Gas Operator | Jul 2025 |
| 15 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 16 | Renegade Oil & Gas Company LLC | | Oil & Gas Operator | Jul 2025 |
| 17 | Resource Development Technology LLC | Morrison, CO 80465 | Oil & Gas Operator | Oct 2020 |
| 18 | Retamco Operating Inc | Red Lodge, MT 59068 | Oil & Gas Operator | Aug 2025 |
| 19 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 20 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Jul 2025 |
| 21 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Oct 2025 |
| 22 | Rio Mesa Resources Inc | | Oil & Gas Operator | Jul 2022 |
| 23 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 24 | Riviera Drilling & Exploration Company | | Oil & Gas Operator | Sep 2013 |
| 25 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 26 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
| 27 | Rocket Petroleum Company | | Oil & Gas Operator | Aug 2005 |
| 28 | Rockies Oil & Gas Inc | | Oil & Gas Operator | Dec 2015 |
| 29 | Rocky Mountain Operating Co Inc | Littleton, CO 80121 | Oil & Gas Operator | Dec 2011 |
| 30 | Rocky MTN Natural Gas LLC Adba Black Hills Energy | | Gas Operator | Dec 2003 |
| 31 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Oct 2025 |
| 32 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 33 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 34 | Running Foxes Petroleum Inc. | Centennial, CO 80112 | Oil & Gas Operator | Jun 2025 |
| 35 | RWL Enterprises | | Oil & Gas Operator | Feb 2017 |