| 1 | Barrett Corporation* Bill | | Oil & Gas Operator | Jan 2024 |
| 2 | Bayless Producer LLC* Robert L | | Oil & Gas Operator | Feb 2024 |
| 3 | Beeman Oil & Gas LLC | | Oil & Gas Operator | Feb 2024 |
| 4 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 5 | Celsius Energy Company | Denver, CO 80202-1558 | Oil & Gas Operator | Mar 2000 |
| 6 | Grynberg* Jack Dba Grynberg Petroleum Co | | Oil & Gas Operator | Jan 2023 |
| 7 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Dec 2023 |
| 8 | Kinder Morgan Co2 Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 9 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 10 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Feb 2024 |
| 11 | Messer LLC | | Gas Operator | Jan 2024 |
| 12 | Monument Global Resources Inc | Dallas, TX 75243 | Oil & Gas Operator | Sep 2023 |
| 13 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 14 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 15 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2023 |
| 16 | Questar Expl. And Prod. Co. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jul 2011 |
| 17 | Red Mountain Energy LLC | | Oil & Gas Operator | Sep 2017 |
| 18 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Apr 2024 |
| 19 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 20 | Seeley Oil Company, LLC | Cortez, CO 81321 | Oil & Gas Operator | Feb 2024 |
| 21 | Smith Energy Limited Partnership 1988 | | Oil & Gas Operator | May 2012 |
| 22 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 23 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |