| 1 | Argonex Company LLC | | Oil & Gas Operator | Jan 2024 |
| 2 | Axis Exploration LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2024 |
| 3 | Barrett Corporation* Bill | | Oil & Gas Operator | Jan 2024 |
| 4 | Bataa Oil Inc | Greeley, CO 80634 | Oil & Gas Operator | Feb 2024 |
| 5 | Bates* James Edward | | Oil & Gas Operator | Jul 2017 |
| 6 | Bayless Producer LLC* Robert L | | Oil & Gas Operator | Feb 2024 |
| 7 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 8 | Berry Energy Inc*Walter | | Oil & Gas Operator | Feb 2017 |
| 9 | Blue Chip Oil Inc | | Oil & Gas Operator | Jan 2024 |
| 10 | Blue Creek Inc | | Oil & Gas Operator | Dec 2002 |
| 11 | Bonanza Creek Energy Operating Company LLC | | Oil & Gas Operator | Jan 2024 |
| 12 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 13 | Burlington Resources Oil & Gas LP | | Oil & Gas Operator | Feb 2020 |
| 14 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |
| 15 | Carrizo Niobrara LLC | | Oil & Gas Operator | Aug 2017 |
| 16 | Cascade Oil And Gas, Inc | | Oil & Gas Operator | Jun 2005 |
| 17 | CGT Inc | | Oil & Gas Operator | May 2015 |
| 18 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Feb 2024 |
| 19 | Charles P Dunning LLC | | Oil & Gas Operator | Jan 2024 |
| 20 | City & County Of Denver | | Oil & Gas Operator | Sep 2023 |
| 21 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | Feb 2024 |
| 22 | Colton Limited Liability Co | | Oil & Gas Operator | Sep 2023 |
| 23 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 24 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Feb 2024 |
| 25 | Crestone Peak Resources Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 26 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 27 | Dart Oil Co | Parker, CO 80134 | Oil & Gas Operator | Dec 2022 |
| 28 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
| 29 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |
| 30 | Diamond Operating, Inc. | | Oil & Gas Operator | Feb 2022 |
| 31 | DJ Production Services Inc | | Oil & Gas Operator | Sep 2012 |
| 32 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |
| 33 | Edge Energy LLC | | Oil & Gas Operator | Feb 2024 |
| 34 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Jan 2021 |
| 35 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 36 | Energy Oil And Gas Inc | | Oil & Gas Operator | Dec 2010 |
| 37 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 38 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 39 | Enprop Inc | | Oil & Gas Operator | Feb 2013 |
| 40 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Dec 2023 |
| 41 | Extraction Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 42 | Fahey Oil & Gas | | Oil & Gas Operator | Jul 2021 |
| 43 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 44 | Fritzler Resources, Inc. | Fort Morgan, CO 80701 | Oil & Gas Operator | Dec 2023 |
| 45 | Geotech Production Inc | Centennial, CO 80016 | Oil & Gas Operator | Jun 2020 |
| 46 | Gils Hot Oil Service | | Oil & Gas Operator | Jun 2022 |
| 47 | Goodwin Energy Management LLC | | Oil & Gas Operator | Dec 2022 |
| 48 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2022 |
| 49 | Griffin Management LLC | | Oil & Gas Operator | Feb 2010 |
| 50 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 51 | Heartland Oil & Gas Company | | Oil & Gas Operator | Jun 2000 |
| 52 | Helena Resources Inc | Lakewood, CO 80215 | Oil & Gas Operator | Jan 2024 |
| 53 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Apr 2024 |
| 54 | HRC Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2017 |
| 55 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 56 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 57 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 58 | Hyndrex Resources | | Oil & Gas Operator | Apr 2018 |
| 59 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Jan 2024 |
| 60 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Feb 2024 |
| 61 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 62 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 63 | Magpie Operating, Inc | | Oil & Gas Operator | Feb 2024 |
| 64 | Markus Production, Inc | | Oil & Gas Operator | Mar 2021 |
| 65 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 66 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2024 |
| 67 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 68 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 69 | Monahan* Rex Family Trust | | Oil & Gas Operator | Sep 2010 |
| 70 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 71 | Natural Resource Group Inc | | Oil & Gas Operator | Oct 2023 |
| 72 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 73 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Apr 2024 |
| 74 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 75 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 76 | Overland Resources LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Jul 2019 |
| 77 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Aug 2023 |
| 78 | Paladin Energy Partners LLC | | Oil & Gas Operator | Dec 2006 |
| 79 | Pancanadian Energy Resources Inc | | Oil & Gas Operator | Dec 2004 |
| 80 | Pape Oilfield Service Inc | | Oil & Gas Operator | Jul 2018 |
| 81 | Par Pacific Holdings Inc | | Oil & Gas Operator | Apr 2015 |
| 82 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 83 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Jan 2024 |
| 84 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Mar 2024 |
| 85 | Petro Operating Company LLC | | Oil & Gas Operator | Feb 2024 |
| 86 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 87 | Petroshare Corporation | | Oil & Gas Operator | Sep 2023 |
| 88 | Piland Resources | | Oil & Gas Operator | Mar 2022 |
| 89 | Poncho Production Co | | Oil & Gas Operator | Jan 2022 |
| 90 | Pozo Resources, Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 91 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Feb 2024 |
| 92 | Private Oil Industries Inc | | Oil & Gas Operator | Feb 2004 |
| 93 | Providence Operating LLC Dba Poco Operating | | Oil & Gas Operator | Jan 2024 |
| 94 | Qualls Operating* R C | | Oil & Gas Operator | Mar 2005 |
| 95 | Raisa II Operating LLC | | Oil & Gas Operator | Mar 2017 |
| 96 | Recovery Energy Inc | | Oil & Gas Operator | Jan 2014 |
| 97 | Renegade Oil & Gas Company LLC | | Oil & Gas Operator | Jan 2024 |
| 98 | Rockies Oil & Gas Inc | | Oil & Gas Operator | Dec 2015 |
| 99 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 100 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Feb 2024 |