| 1 | 8 North LLC | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 2 | Bataa Oil Inc | Arvada, CO 80005 | Oil & Gas Operator | Aug 2025 |
| 3 | Blue Chip Oil Inc | | Oil & Gas Operator | Jul 2025 |
| 4 | CDM Oil & Gas | | Oil & Gas Operator | Oct 2018 |
| 5 | Crestone Peak Resources Operating LLC | | Oil & Gas Operator | Jul 2025 |
| 6 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Feb 2024 |
| 7 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 8 | Extraction Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 9 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 10 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2022 |
| 11 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 12 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2025 |
| 13 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 14 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 15 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 16 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Oct 2025 |
| 17 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 18 | Pancanadian Energy Resources Inc | | Oil & Gas Operator | Dec 2004 |
| 19 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 20 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Jul 2025 |
| 21 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 22 | Petroleum Management LLC | | Oil & Gas Operator | May 2011 |
| 23 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 24 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 25 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Aug 2025 |
| 26 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 27 | Top Operating Company | | Oil & Gas Operator | Oct 2022 |
| 28 | United States Exploration, Inc. | Denver, CO 80802 | Oil & Gas Operator | Jun 2009 |
| 29 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Jul 2025 |