| 1 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
| 2 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 3 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 4 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Nov 2024 |
| 5 | Berry Energy Inc*Walter | | Oil & Gas Operator | Feb 2017 |
| 6 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 7 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Oct 2024 |
| 8 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2024 |
| 9 | Cig Resources Company | Colorado Spring, CO 80944-1087 | Oil & Gas Operator | Jun 2018 |
| 10 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
| 11 | Conquest Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Aug 2024 |
| 12 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Dec 2024 |
| 13 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |
| 14 | Direct Petroleum Exploration Inc | | Oil & Gas Operator | Aug 2010 |
| 15 | Dunne Equities Operating Inc | Houston, TX 77057 | Oil & Gas Operator | Aug 2022 |
| 16 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 17 | EP Energy Management LLC | | Oil & Gas Operator | Jun 2006 |
| 18 | Gilbert-Stewart Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2024 |
| 19 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2022 |
| 20 | Halde Oil Inc | | Oil & Gas Operator | Sep 2024 |
| 21 | Helena Resources Inc | Lakewood, CO 80215 | Oil & Gas Operator | Oct 2024 |
| 22 | High Plains Energy LLC | | Oil & Gas Operator | May 2017 |
| 23 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 24 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2024 |
| 25 | Kuenzler & Flora Reserve Company | | Oil Operator | Oct 2024 |
| 26 | Leben* Theodore I Dba Leben Oil Companies | | Oil Operator | Jun 2002 |
| 27 | Lewis & Clark Exploration Company | | Oil Operator | Jan 2005 |
| 28 | Loeb LLC* Herman L | | Oil & Gas Operator | Oct 2024 |
| 29 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Oct 2024 |
| 30 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 31 | Monument Gas Marketing Inc | | Oil & Gas Operator | Aug 2024 |
| 32 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 33 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Sep 2024 |
| 34 | Murfin Drilling Co., Inc. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 35 | Mystique Resources Company | Aurora, CO 80016 | Oil & Gas Operator | Feb 2023 |
| 36 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
| 37 | Pelican Hill Oil & Gas Inc | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 38 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 39 | Production Management Inc | | Oil & Gas Operator | Jul 2021 |
| 40 | Pronghorn Operating LLC | | Oil Operator | Jan 2023 |
| 41 | Resource Development Technology LLC | Morrison, CO 80465 | Oil & Gas Operator | Oct 2020 |
| 42 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 43 | Thomas Operating Company Inc | Greeley, CO 80634 | Oil & Gas Operator | Aug 2008 |
| 44 | Tindall Operating Company | Englewood, CO 80112 | Oil & Gas Operator | Sep 2024 |
| 45 | Trousil & Associates, Inc. | Steamboat SPG, CO 80477 | Oil & Gas Operator | Dec 2006 |
| 46 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 47 | Vecta Oil & Gas LTD | Dallas, TX 75235 | Oil & Gas Operator | Oct 2024 |
| 48 | Wiepking-Fullerton Energy LLC | | Oil & Gas Operator | Sep 2024 |
| 49 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |