| 1 | Argali Exploration Company | | Gas Operator | Aug 2024 |
| 2 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Oct 2024 |
| 3 | Baney Well Service Inc | Denver, CO 80237 | Oil Operator | Jun 2016 |
| 4 | Bataa Oil Inc | Greeley, CO 80634 | Oil & Gas Operator | Oct 2024 |
| 5 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 6 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 7 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Nov 2024 |
| 8 | Blue Creek Inc | | Oil & Gas Operator | Dec 2002 |
| 9 | Caerus Washco LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2019 |
| 10 | Central Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 11 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 12 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Oct 2024 |
| 13 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 14 | CM Production LLC | | Oil & Gas Operator | Aug 2020 |
| 15 | Colton Limited Liability Co | | Oil & Gas Operator | Sep 2023 |
| 16 | Copper Land Resources LLC | | Oil Operator | Oct 2024 |
| 17 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Sep 2024 |
| 18 | Crumley* Jack | | Oil Operator | Aug 2018 |
| 19 | Davis, LLC* Edward Mike | | Oil & Gas Operator | Sep 2015 |
| 20 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |
| 21 | Diamond Operating, Inc. | | Oil & Gas Operator | Feb 2022 |
| 22 | DJ Production Services Inc | | Oil & Gas Operator | Sep 2012 |
| 23 | E M V Company | | Oil Operator | Oct 2003 |
| 24 | Eagle Operating Inc | Minot, ND 58701 | Oil & Gas Operator | Oct 2024 |
| 25 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 26 | Enerplus Resources USA Corporation | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
| 27 | Enprop Inc | | Oil & Gas Operator | Feb 2013 |
| 28 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2024 |
| 29 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2024 |
| 30 | Fritzler Resources, Inc. | Fort Morgan, CO 80701 | Oil & Gas Operator | Aug 2024 |
| 31 | Geotech Production Inc | Centennial, CO 80016 | Oil & Gas Operator | Jun 2020 |
| 32 | Grand Mesa Operating Company | Wichita, KS 67206 | Oil & Gas Operator | Oct 2024 |
| 33 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Oct 2024 |
| 34 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2022 |
| 35 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 36 | Haley/Hughes Operations | | Oil Operator | Apr 2001 |
| 37 | Heartland Oil & Gas Company | | Oil & Gas Operator | Jun 2000 |
| 38 | High Plains Energy LLC | | Oil & Gas Operator | May 2017 |
| 39 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 40 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 41 | Hyndrex Resources | | Oil & Gas Operator | Apr 2018 |
| 42 | Impetro Resources LLC | | Oil & Gas Operator | Sep 2024 |
| 43 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2024 |
| 44 | Joeckel* Raymond N | | Oil Operator | Mar 2000 |
| 45 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Oct 2024 |
| 46 | K W B Oil Property MGMT Inc | | Oil & Gas Operator | Jun 2000 |
| 47 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Jan 2017 |
| 48 | Lilis Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2017 |
| 49 | M E III Corporation | | Oil & Gas Operator | Apr 2022 |
| 50 | Magpie Operating, Inc | | Oil & Gas Operator | Sep 2024 |
| 51 | Markus Production, Inc | | Oil & Gas Operator | Mar 2021 |
| 52 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 53 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2024 |
| 54 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 55 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 56 | Monahan* Rex Family Trust | | Oil & Gas Operator | Sep 2010 |
| 57 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 58 | Murfin Drilling Co., Inc. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 59 | Nighthawk Production LLC | | Oil & Gas Operator | Jun 2018 |
| 60 | Niobrara Illuminating Gas Associates LLC | | Oil & Gas Operator | Oct 2009 |
| 61 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 62 | Northstar Gas Company Inc | | Oil & Gas Operator | Jan 2016 |
| 63 | Nylund* J. W. | | Oil Operator | Jul 2000 |
| 64 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2024 |
| 65 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 66 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
| 67 | Padco LLC | | Oil & Gas Operator | Oct 2024 |
| 68 | Pape Oilfield Service Inc | | Oil & Gas Operator | Jul 2018 |
| 69 | Par Pacific Holdings Inc | | Oil & Gas Operator | Apr 2015 |
| 70 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Oct 2024 |
| 71 | Petro Operating Company LLC | | Oil & Gas Operator | Sep 2024 |
| 72 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 73 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 74 | Petron Development Company | | Oil & Gas Operator | Oct 2020 |
| 75 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 76 | Poncho Production Co | | Oil & Gas Operator | Jan 2022 |
| 77 | Puckett-Warren Oil Co | | Oil & Gas Operator | Dec 2007 |
| 78 | Qualls Operating* R C | | Oil & Gas Operator | Mar 2005 |
| 79 | Recovery Energy Inc | | Oil & Gas Operator | Jan 2014 |
| 80 | Renegade Oil & Gas Company LLC | | Oil & Gas Operator | Sep 2024 |
| 81 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Sep 2024 |
| 82 | Saga Petroleum Limited Liability Co Of Co | | Oil & Gas Operator | Jun 2018 |
| 83 | Sand Hills Society | | Gas Operator | Oct 2009 |
| 84 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Dec 2024 |
| 85 | Schneider Energy Services Inc | | Oil & Gas Operator | Aug 2024 |
| 86 | Smith Energy Corp | | Oil & Gas Operator | Jan 2024 |
| 87 | Smith Energy LLC | | Oil & Gas Operator | Sep 2024 |
| 88 | Sovereign Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 89 | St Croix Operating Inc | | Oil Operator | Sep 2024 |
| 90 | Standley* Robert K Dba Otis Energy | | Oil Operator | Jan 2023 |
| 91 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Aug 2024 |
| 92 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Oct 2024 |
| 93 | Timka Resources LTD | | Oil & Gas Operator | Oct 2024 |
| 94 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 95 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 96 | Tyler Rockies Exploration LTD | Tyler, TX 75710-0119 | Oil & Gas Operator | Sep 2024 |
| 97 | Valkyrie Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
| 98 | Vista Operating Inc | | Oil & Gas Operator | Dec 2014 |
| 99 | Visual Optics Inc | | Oil Operator | Dec 2012 |
| 100 | Walsh Production Inc | | Oil & Gas Operator | Nov 2008 |