| 1 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 2 | Axis Exploration LLC | | Oil & Gas Operator | Aug 2024 |
| 3 | Bates* James Edward | | Oil & Gas Operator | Jul 2017 |
| 4 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2024 |
| 5 | Becca Oil LLC | Cushing, OK 74023-1347 | Oil & Gas Operator | Sep 2024 |
| 6 | Blue Creek Inc | | Oil & Gas Operator | Dec 2002 |
| 7 | Burlington Resources Oil & Gas LP | | Oil & Gas Operator | Feb 2020 |
| 8 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 9 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Sep 2024 |
| 10 | Chandler & Associates LLC | | Oil & Gas Operator | Jul 2001 |
| 11 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | Sep 2024 |
| 12 | Colton Limited Liability Co | | Oil & Gas Operator | Sep 2023 |
| 13 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Nov 2024 |
| 14 | Crestone Peak Resources Operating LLC | | Oil & Gas Operator | Aug 2024 |
| 15 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 16 | Davis, LLC* Edward Mike | | Oil & Gas Operator | Sep 2015 |
| 17 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Jan 2021 |
| 18 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 19 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 20 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2024 |
| 21 | Fahey Oil & Gas | | Oil & Gas Operator | Jul 2021 |
| 22 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Nov 2024 |
| 23 | Geotech Production Inc | Centennial, CO 80016 | Oil & Gas Operator | Jun 2020 |
| 24 | Gils Hot Oil Service | | Oil & Gas Operator | Jun 2022 |
| 25 | GMT Exploration Company LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 26 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2022 |
| 27 | Griffin Management LLC | | Oil & Gas Operator | Feb 2010 |
| 28 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 29 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 30 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Nov 2024 |
| 31 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 32 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 33 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 34 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2024 |
| 35 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 36 | Lilis Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2017 |
| 37 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 38 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Nov 2024 |
| 39 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 40 | Oilfield Operating Company | Cushing, OK 74023-1347 | Oil & Gas Operator | Jan 2018 |
| 41 | Overland Resources LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Jul 2019 |
| 42 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 43 | Paladin Energy Partners LLC | | Oil & Gas Operator | Dec 2006 |
| 44 | Pancanadian Energy Resources Inc | | Oil & Gas Operator | Dec 2004 |
| 45 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Sep 2024 |
| 46 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 47 | Petroshare Corporation | | Oil & Gas Operator | Jan 2024 |
| 48 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 49 | Poncho Production Co | | Oil & Gas Operator | Jan 2022 |
| 50 | Pozo Resources, Inc | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 51 | Recovery Energy Inc | | Oil & Gas Operator | Jan 2014 |
| 52 | Renegade Oil & Gas Company LLC | | Oil & Gas Operator | Sep 2024 |
| 53 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 54 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Sep 2024 |
| 55 | Sawtooth Energy Partners LLC | | Oil & Gas Operator | Nov 2005 |
| 56 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 57 | Smith Energy Corp | | Oil & Gas Operator | Jan 2024 |
| 58 | Sovereign Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 59 | Starlight Resources LLC | | Oil & Gas Operator | Jun 2006 |
| 60 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Aug 2024 |
| 61 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Sep 2024 |
| 62 | Thomas Operating Company Inc | Greeley, CO 80634 | Oil & Gas Operator | Aug 2008 |
| 63 | Thorofare Resources, Inc | | Oil & Gas Operator | May 2011 |
| 64 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Nov 2024 |
| 65 | Tindall Operating Company | Englewood, CO 80112 | Oil & Gas Operator | Sep 2024 |
| 66 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 67 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | Sep 2024 |
| 68 | Tyler Rockies Exploration LTD | Tyler, TX 75710-0119 | Oil & Gas Operator | Sep 2024 |
| 69 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 70 | United States Exploration, Inc. | Denver, CO 80802 | Oil & Gas Operator | Jun 2009 |
| 71 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |