| 1 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Oct 2025 |
| 2 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 3 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 4 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Oct 2025 |
| 5 | Blue Creek Inc | Fort Worth, TX 76181 | Oil & Gas Operator | Jul 2002 |
| 6 | Caerus Washco LLC | Denver, CO 80202 | Gas Operator | Mar 2015 |
| 7 | Central Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 8 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 9 | CM Production, LLC | | Oil & Gas Operator | Aug 2020 |
| 10 | Copper Land Resources LLC | | Oil Operator | Sep 2025 |
| 11 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2025 |
| 12 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |
| 13 | Diamond Operating Inc | | Oil & Gas Operator | Aug 2021 |
| 14 | Eagle Operating, Inc. | Minot, ND 58701 | Oil & Gas Operator | Oct 2025 |
| 15 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 16 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 17 | Fritzler Resources Inc | Fort Morgan, CO 80701 | Oil & Gas Operator | Jun 2025 |
| 18 | Geotech Production Inc | Centennial, CO 80016 | Oil Operator | Apr 2011 |
| 19 | Grand Mesa Operating Company | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 20 | High Plains Energy LLC | | Oil & Gas Operator | May 2017 |
| 21 | Impetro Resources LLC | | Oil & Gas Operator | Sep 2025 |
| 22 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2025 |
| 23 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2025 |
| 24 | Lilis Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2017 |
| 25 | M E III Corporation | | Oil & Gas Operator | Apr 2022 |
| 26 | Magpie Operating, Inc | | Oil & Gas Operator | Sep 2025 |
| 27 | Markus Production, Inc | | Oil & Gas Operator | Mar 2021 |
| 28 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2025 |
| 29 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 30 | Monahan* Rex Family Trust | | Oil & Gas Operator | May 2007 |
| 31 | Nighthawk Production LLC | | Oil & Gas Operator | May 2016 |
| 32 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 33 | Northstar Gas Company, Inc. | | Oil & Gas Operator | Jan 2016 |
| 34 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2025 |
| 35 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 36 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 37 | Padco LLC | | Oil & Gas Operator | Mar 2023 |
| 38 | Pape Oilfield Service Inc | | Oil & Gas Operator | Dec 2012 |
| 39 | Par Pacific Holdings Inc | | Oil & Gas Operator | Jun 2010 |
| 40 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Oct 2025 |
| 41 | Petro Operating Company LLC | | Oil & Gas Operator | Sep 2025 |
| 42 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 43 | Petron Development Company | | Oil & Gas Operator | Sep 2020 |
| 44 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 45 | Puckett-Warren Oil Co | | Oil Operator | Dec 2004 |
| 46 | Renegade Oil & Gas Company LLC | | Oil & Gas Operator | Sep 2025 |
| 47 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 48 | Saga Petroleum Limited Liability Co Of Co | | Oil & Gas Operator | Sep 2015 |
| 49 | Schmid Properties, Inc. | Hico, TX 76457 | Oil & Gas Operator | Dec 2025 |
| 50 | Schneider Energy Services Inc | | Oil & Gas Operator | Jul 2025 |
| 51 | Smith Energy LLC | | Oil & Gas Operator | Oct 2025 |
| 52 | St Croix Operating Inc | | Oil & Gas Operator | Sep 2025 |
| 53 | Standley* Robert K Dba Otis Energy | | Oil Operator | Jan 2023 |
| 54 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 55 | Timka Resources, LTD | | Oil & Gas Operator | Oct 2025 |
| 56 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 57 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 58 | Tyler Rockies Exploration LTD | Tyler, TX 75710-0119 | Oil & Gas Operator | Sep 2025 |
| 59 | Vista Operating, Inc. | | Oil & Gas Operator | Dec 2014 |
| 60 | Visual Optics Inc | | Oil Operator | Dec 2012 |
| 61 | Ward & Son* Alfred | | Oil & Gas Operator | Jul 2021 |
| 62 | Wesco Operating Inc | Casper, WY 82602 | Oil & Gas Operator | Oct 2025 |
| 63 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Aug 2025 |
| 64 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Oct 2025 |