| 1 | Advantage Resources Inc | Broomfield, CO 80020 | Oil & Gas Operator | Aug 2024 |
| 2 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 3 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 4 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 5 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Nov 2024 |
| 6 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | May 2018 |
| 7 | Boulder Oil Company | | Oil & Gas Operator | Sep 2004 |
| 8 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 9 | Brown Oil & Gas LLC | | Oil & Gas Operator | Oct 2024 |
| 10 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 11 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Oct 2024 |
| 12 | Chandler & Associates LLC | | Oil & Gas Operator | Jul 2001 |
| 13 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
| 14 | CM Production LLC | | Oil & Gas Operator | Aug 2020 |
| 15 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Sep 2024 |
| 16 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |
| 17 | Diamond Operating, Inc. | | Oil & Gas Operator | Feb 2022 |
| 18 | Diamondback Oil Partners LLP | Arvada, CO 80004 | Oil & Gas Operator | Dec 2016 |
| 19 | Diversified Operating Corporation | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 20 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 21 | Donnelly Casing Pulling Co | | Oil Operator | Aug 2020 |
| 22 | Duncan Energy Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2008 |
| 23 | East Cheyenne Gas Storage LLC | | Oil Operator | Sep 2024 |
| 24 | Energy Oil And Gas Inc | | Oil & Gas Operator | Dec 2010 |
| 25 | Enerplus Resources USA Corporation | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
| 26 | Enprop Inc | | Oil & Gas Operator | Feb 2013 |
| 27 | Equity Oil Company | Salt Lake City, UT 84110-095 | Oil & Gas Operator | Aug 2004 |
| 28 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2024 |
| 29 | Forestar Group Inc | | Oil & Gas Operator | Sep 2015 |
| 30 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2024 |
| 31 | Fritzler Resources, Inc. | Fort Morgan, CO 80701 | Oil & Gas Operator | Aug 2024 |
| 32 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Oct 2024 |
| 33 | H & M Petroleum Corporation | Lincoln, NE 68516 | Oil & Gas Operator | Sep 2024 |
| 34 | High Plains Energy LLC | | Oil & Gas Operator | May 2017 |
| 35 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 36 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 37 | Impetro Resources LLC | | Oil & Gas Operator | Sep 2024 |
| 38 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2024 |
| 39 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Dec 2024 |
| 40 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Oct 2024 |
| 41 | K W B Oil Property MGMT Inc | | Oil & Gas Operator | Jun 2000 |
| 42 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2024 |
| 43 | Legado DJ, LLC | | Oil Operator | Jul 2011 |
| 44 | Lewis & Clark Exploration Company | | Oil Operator | Jan 2005 |
| 45 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2024 |
| 46 | Magpie Operating, Inc | | Oil & Gas Operator | Sep 2024 |
| 47 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2024 |
| 48 | Monahan* Rex Family Trust | | Oil & Gas Operator | Sep 2010 |
| 49 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 50 | Northern Michigan Oil & Gas Corporation | | Oil & Gas Operator | May 2024 |
| 51 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 52 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
| 53 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 54 | Private Oil Industries Inc | | Oil & Gas Operator | Feb 2004 |
| 55 | Qep Uinta Basin Inc | Salt Lake City, UT 84145-0601 | Oil & Gas Operator | Mar 2007 |
| 56 | Rampart Energy Company | | Oil & Gas Operator | Dec 2023 |
| 57 | Red Mountain Resources LLC | | Oil & Gas Operator | Sep 2023 |
| 58 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Sep 2024 |
| 59 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Nov 2024 |
| 60 | Schneider Energy Services Inc | | Oil & Gas Operator | Aug 2024 |
| 61 | Singletree Resources Inc | | Oil & Gas Operator | Aug 2014 |
| 62 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 63 | Strachan Exploration Inc | Englewood, CO 80112 | Oil & Gas Operator | Sep 2024 |
| 64 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Aug 2024 |
| 65 | T P Operating LLC | | Oil & Gas Operator | Nov 1999 |
| 66 | Timka Resources LTD | | Oil & Gas Operator | Oct 2024 |
| 67 | Triple R Oil Co | | Oil & Gas Operator | Jun 2002 |
| 68 | Walsh Production Inc | | Oil & Gas Operator | Nov 2008 |
| 69 | Ward & Son* Alfred | | Oil & Gas Operator | Jun 2023 |
| 70 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Sep 2024 |
| 71 | Winslow Resources Inc | | Oil & Gas Operator | May 2002 |