| 1 | Argonex Company LLC | | Oil & Gas Operator | Jan 2024 |
| 2 | Axis Exploration LLC | | Oil & Gas Operator | Apr 2026 |
| 3 | Barrett Corporation* Bill | | Oil & Gas Operator | Apr 2026 |
| 4 | Bataa Oil Inc | Arvada, CO 80005 | Oil & Gas Operator | May 2026 |
| 5 | Bates* James Edward | | Oil & Gas Operator | Jul 2017 |
| 6 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | May 2026 |
| 7 | Behrens Resources Inc | | Oil & Gas Operator | Jul 2019 |
| 8 | Berry Energy Inc*Walter | | Oil & Gas Operator | Aug 2016 |
| 9 | Bison IV Operating LLC | | Oil & Gas Operator | May 2026 |
| 10 | Blue Chip Oil Inc | | Oil & Gas Operator | Jun 2026 |
| 11 | Blue Creek Inc | Fort Worth, TX 76181 | Oil & Gas Operator | Jul 2002 |
| 12 | Bonanza Creek Energy Operating Company LLC | | Oil & Gas Operator | Apr 2026 |
| 13 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |
| 14 | Carrizo Niobrara LLC | | Oil & Gas Operator | Jun 2017 |
| 15 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | May 2026 |
| 16 | Charles P Dunning LLC | | Oil & Gas Operator | Apr 2026 |
| 17 | City & County Of Denver | | Oil & Gas Operator | Sep 2023 |
| 18 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | May 2026 |
| 19 | Colton Limited Liability Co | | Oil & Gas Operator | Sep 2023 |
| 20 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 21 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Mar 2026 |
| 22 | Crestone Peak Resources Operating LLC | | Oil & Gas Operator | Apr 2026 |
| 23 | Danmar Production Company LLC | | Oil & Gas Operator | Dec 2022 |
| 24 | Developing Equities Group LLC | | Oil & Gas Operator | Feb 2008 |
| 25 | Diamond Operating Inc | | Oil & Gas Operator | Aug 2021 |
| 26 | Dunamis Energy Operating LLC | | Oil & Gas Operator | Apr 2026 |
| 27 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Apr 2026 |
| 28 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 29 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 30 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 31 | Enprop Inc | | Oil & Gas Operator | Feb 2013 |
| 32 | Extraction Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 33 | Fahey Oil & Gas | | Oil & Gas Operator | Jul 2021 |
| 34 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2026 |
| 35 | Fritzler Resources Inc | Fort Morgan, CO 80701 | Oil & Gas Operator | Apr 2026 |
| 36 | Goodwin Energy Management LLC | | Oil & Gas Operator | Dec 2022 |
| 37 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2020 |
| 38 | Griffin Management LLC | | Oil & Gas Operator | Feb 2010 |
| 39 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 40 | Helena Resources Inc | Lakewood, CO 80215 | Oil & Gas Operator | Apr 2026 |
| 41 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Jul 2026 |
| 42 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2002 |
| 43 | Hyndrex Resources | | Oil & Gas Operator | Feb 2016 |
| 44 | Impetro Resources LLC | | Oil & Gas Operator | May 2026 |
| 45 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | May 2026 |
| 46 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | May 2026 |
| 47 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2026 |
| 48 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Jul 2026 |
| 49 | Magpie Operating, Inc | | Oil & Gas Operator | May 2026 |
| 50 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 51 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | May 2026 |
| 52 | McClane Energy Inc | | Oil & Gas Operator | Aug 2017 |
| 53 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 54 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2026 |
| 55 | Monahan* Rex Family Trust | | Oil & Gas Operator | May 2007 |
| 56 | Natural Resource Group Inc | | Oil & Gas Operator | Jan 2024 |
| 57 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2026 |
| 58 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Jul 2026 |
| 59 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 60 | Overland Resources LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Feb 2019 |
| 61 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 62 | Par Pacific Holdings Inc | | Oil & Gas Operator | Jun 2010 |
| 63 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 64 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | May 2026 |
| 65 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | May 2026 |
| 66 | Petro Operating Company LLC | | Oil & Gas Operator | May 2026 |
| 67 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 68 | Petroshare Corporation | | Oil & Gas Operator | Jan 2024 |
| 69 | Piland Resources | | Oil & Gas Operator | Mar 2022 |
| 70 | Poncho Production Co | | Oil & Gas Operator | Jan 2022 |
| 71 | Providence Operating LLC Dba Poco Operating | | Oil & Gas Operator | Nov 2025 |
| 72 | Rampike Resources, LTD | Denver, CO 80202 | Oil Operator | Feb 2026 |
| 73 | Renegade Oil & Gas Company LLC | | Oil & Gas Operator | May 2026 |
| 74 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Jun 2026 |
| 75 | Schneider Energy Services Inc | | Oil & Gas Operator | Mar 2026 |
| 76 | Schreider & Company, Inc | | Oil & Gas Operator | Jun 2023 |
| 77 | Smith Energy Corp | | Oil & Gas Operator | Jan 2024 |
| 78 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 79 | Starlight Resources LLC | | Oil & Gas Operator | Apr 2006 |
| 80 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Dec 2025 |
| 81 | Texas American Resources Company | Austin, TX 78701 | Oil & Gas Operator | Jul 2026 |
| 82 | Texas Tea Of Colorado LLC Dba Texas Tea LLC | | Oil & Gas Operator | Jun 2021 |
| 83 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 84 | Tudex Petroleum Inc | | Oil & Gas Operator | Sep 2019 |
| 85 | Tyler Rockies Exploration LTD | Tyler, TX 75710-0119 | Oil & Gas Operator | Dec 2025 |
| 86 | Umad LLC | | Oil & Gas Operator | Feb 2010 |
| 87 | United States Exploration, Inc. | Denver, CO 80802 | Oil & Gas Operator | Apr 2007 |
| 88 | Verdad Resources LLC | | Oil & Gas Operator | Apr 2026 |
| 89 | Western Interior Energy Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 90 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Apr 2026 |
| 91 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 92 | Wise* Wayne L | | Oil & Gas Operator | Dec 2023 |