| 1 | Blue Chip Oil Inc | | Oil & Gas Operator | Oct 2024 |
| 2 | Chandler DJ Basin LLC | | Oil & Gas Operator | Jul 2012 |
| 3 | Crestone Peak Resources Operating LLC | | Oil & Gas Operator | Oct 2024 |
| 4 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Feb 2024 |
| 5 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 6 | Energy Oil And Gas Inc | | Oil & Gas Operator | Dec 2010 |
| 7 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2024 |
| 8 | Extraction Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 9 | HRC Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2017 |
| 10 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 11 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
| 12 | Markus Production, Inc | | Oil & Gas Operator | Mar 2021 |
| 13 | McWhinney Holding Company LLLP | | Oil & Gas Operator | Mar 2021 |
| 14 | Mineral Resources, Incorporated | Lewisville, TX 75029 | Oil & Gas Operator | Dec 2024 |
| 15 | Natural Resource Group Inc | | Oil & Gas Operator | Jan 2024 |
| 16 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 17 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 18 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 19 | Pancanadian Energy Resources Inc | | Oil & Gas Operator | Dec 2004 |
| 20 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 21 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Oct 2024 |
| 22 | Sovereign Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 23 | United States Exploration, Inc. | Denver, CO 80802 | Oil & Gas Operator | Jun 2009 |