| 1 | Anchor Bay Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2007 |
| 2 | Aurora Power Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Aug 2018 |
| 3 | Baney Well Service Inc | Denver, CO 80237 | Oil Operator | Jun 2016 |
| 4 | Black Raven Energy Inc | | Oil & Gas Operator | Apr 2017 |
| 5 | Blue Creek Inc | | Oil & Gas Operator | Dec 2002 |
| 6 | Carrizo Niobrara LLC | | Oil & Gas Operator | Aug 2017 |
| 7 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 8 | Chandler & Associates LLC | | Oil & Gas Operator | Jul 2001 |
| 9 | Charles P Dunning LLC | | Oil & Gas Operator | Jun 2024 |
| 10 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | Sep 2024 |
| 11 | Condor Energy Technology LLC | | Oil & Gas Operator | Jul 2018 |
| 12 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Aug 2024 |
| 13 | Crumley* Jack | | Oil Operator | Aug 2018 |
| 14 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |
| 15 | Diamond Operating, Inc. | | Oil & Gas Operator | Feb 2022 |
| 16 | Diamondback Oil Partners LLP | Arvada, CO 80004 | Oil & Gas Operator | Dec 2016 |
| 17 | Diversified Operating Corporation | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 18 | Duncan Energy Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2008 |
| 19 | Energy Oil And Gas Inc | | Oil & Gas Operator | Dec 2010 |
| 20 | Energy Operatng Company Inc | | Oil & Gas Operator | Jan 2000 |
| 21 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 22 | Enprop Inc | | Oil & Gas Operator | Feb 2013 |
| 23 | Erg Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2015 |
| 24 | Forestar Group Inc | | Oil & Gas Operator | Sep 2015 |
| 25 | Fritzler Resources, Inc. | Fort Morgan, CO 80701 | Oil & Gas Operator | Jul 2024 |
| 26 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 27 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 28 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 29 | Hyndrex Resources | | Oil & Gas Operator | Apr 2018 |
| 30 | Impetro Resources LLC | | Oil & Gas Operator | Aug 2024 |
| 31 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2024 |
| 32 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2024 |
| 33 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 34 | Kodiak Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jul 2024 |
| 35 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 36 | Magpie Operating, Inc | | Oil & Gas Operator | Aug 2024 |
| 37 | Markus Production, Inc | | Oil & Gas Operator | Mar 2021 |
| 38 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Nov 2024 |
| 39 | Monahan* Rex Family Trust | | Oil & Gas Operator | Sep 2010 |
| 40 | Morning Gun Exploration LLC | | Oil Operator | Oct 2021 |
| 41 | Natural Resource Group Inc | | Oil & Gas Operator | Jan 2024 |
| 42 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Nov 2024 |
| 43 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Nov 2024 |
| 44 | Oilfield Salvage & Service Company | Littleton, CO 80120 | Oil & Gas Operator | Sep 2024 |
| 45 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 46 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2024 |
| 47 | PCR Operating LLC | | Oil & Gas Operator | Jul 2024 |
| 48 | Petcon Associates LTD | Denver, CO 80202 | Oil & Gas Operator | Sep 2018 |
| 49 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Sep 2024 |
| 50 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 51 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 52 | Private Oil Industries Inc | | Oil & Gas Operator | Feb 2004 |
| 53 | Prudent Resources LLC | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 54 | Qep Uinta Basin Inc | Salt Lake City, UT 84145-0601 | Oil & Gas Operator | Mar 2007 |
| 55 | Rampart Energy Company | | Oil & Gas Operator | Dec 2023 |
| 56 | Red Hawk Petroleum LLC | | Oil & Gas Operator | Aug 2024 |
| 57 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Aug 2024 |
| 58 | Rocket Petroleum Company | | Oil & Gas Operator | Aug 2005 |
| 59 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Jul 2024 |
| 60 | Sawtooth Energy Partners LLC | | Oil & Gas Operator | Nov 2005 |
| 61 | Schneider Energy Services Inc | | Oil & Gas Operator | Aug 2024 |
| 62 | Smith Energy Corp | | Oil & Gas Operator | Jan 2024 |
| 63 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 64 | Starlight Resources LLC | | Oil & Gas Operator | Jun 2006 |
| 65 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 66 | Tindall Operating Company | Englewood, CO 80112 | Oil & Gas Operator | Sep 2024 |
| 67 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 68 | Verdad Resources LLC | | Oil & Gas Operator | Aug 2024 |
| 69 | Visual Optics Inc | | Oil Operator | Dec 2012 |
| 70 | Walsh Production Inc | | Oil & Gas Operator | Nov 2008 |
| 71 | Ward & Son* Alfred | | Oil & Gas Operator | Jun 2023 |
| 72 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Aug 2024 |