| 1 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 2 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 3 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Oct 2025 |
| 4 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 5 | Brown Oil & Gas LLC | | Oil & Gas Operator | Sep 2025 |
| 6 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 7 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 8 | CM Production, LLC | | Oil & Gas Operator | Aug 2020 |
| 9 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2025 |
| 10 | Diamond Operating Inc | | Oil & Gas Operator | Aug 2021 |
| 11 | Diversified Operating Corp. | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 12 | Donnelly Casing Pulling Co | | Oil Operator | Aug 2020 |
| 13 | East Cheyenne Gas Storage LLC | | Oil & Gas Operator | Sep 2025 |
| 14 | Fritzler Resources Inc | Fort Morgan, CO 80701 | Oil & Gas Operator | Jun 2025 |
| 15 | H & M Petroleum Corporation | Lincoln, NE 68516 | Oil & Gas Operator | Jun 2025 |
| 16 | High Plains Energy LLC | | Oil & Gas Operator | May 2017 |
| 17 | Impetro Resources LLC | | Oil & Gas Operator | Sep 2025 |
| 18 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2025 |
| 19 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Dec 2025 |
| 20 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2025 |
| 21 | Legado DJ, LLC | | Oil & Gas Operator | Jul 2011 |
| 22 | Magpie Operating, Inc | | Oil & Gas Operator | Sep 2025 |
| 23 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2025 |
| 24 | Monahan* Rex Family Trust | | Oil & Gas Operator | May 2007 |
| 25 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 26 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 27 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 28 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 29 | Red Mountain Resources LLC | | Oil & Gas Operator | Sep 2023 |
| 30 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 31 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Oct 2025 |
| 32 | Schneider Energy Services Inc | | Oil & Gas Operator | Jul 2025 |
| 33 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 34 | Strachan Exploration Inc | Englewood, CO 80112 | Oil & Gas Operator | Aug 2025 |
| 35 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2025 |
| 36 | Timka Resources, LTD | | Oil & Gas Operator | Oct 2025 |
| 37 | Ward & Son* Alfred | | Oil & Gas Operator | Jul 2021 |
| 38 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Aug 2025 |