| 1 | 3RP Operating | | Oil Operator | Dec 2022 |
| 2 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2024 |
| 3 | Allison Bros DRLG Co Inc | | Oil & Gas Operator | Dec 2015 |
| 4 | Amazon Exploration LLC | | Oil Operator | Apr 2016 |
| 5 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 6 | Babcock & Brown Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2007 |
| 7 | Banner Petroleum LLC | | Oil Operator | Dec 2015 |
| 8 | Bellaire Oil Company | | Oil & Gas Operator | Dec 2023 |
| 9 | Benson Mineral Group Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2022 |
| 10 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Apr 2024 |
| 11 | Cannon, Robert D. | | Oil & Gas Operator | Dec 2022 |
| 12 | Central Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 13 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Feb 2024 |
| 14 | Clayton Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 15 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Feb 2024 |
| 16 | Daystar Petroleum, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2023 |
| 17 | Debord Oil Producers Inc | | Oil Operator | Dec 2006 |
| 18 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 19 | Diamond Oil & Gas LLC | Casper, WY 82604 | Oil & Gas Operator | Feb 2024 |
| 20 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 21 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Jan 2024 |
| 22 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Dec 2023 |
| 23 | Fahey, John R | | Oil Operator | Dec 2022 |
| 24 | Foundation Energy MGT, LLC | | Oil & Gas Operator | Jan 2014 |
| 25 | Frerichs, Everett | | Oil Operator | Dec 2022 |
| 26 | Gregory, JD | | Oil & Gas Operator | Dec 2021 |
| 27 | H & R Exploration & Production, Inc. | Sidney, NE 69162 | Oil Operator | May 2007 |
| 28 | Hrbek, R.L. | Merino, CO 80741 | Oil & Gas Operator | Dec 2022 |
| 29 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 30 | Impetro Nonop LLC | | Oil Operator | Dec 2022 |
| 31 | Kebrh Operating LLC | | Oil & Gas Operator | Dec 2022 |
| 32 | Kinder Morgan Inc | Lakewood, CO 80228 | Oil & Gas Operator | Dec 2011 |
| 33 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |
| 34 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Feb 2024 |
| 35 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 36 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Dec 2023 |
| 37 | Pathex Petroleum, Inc | | Gas Operator | Dec 2013 |
| 38 | Petro-Canada Resources (USA) | | Oil & Gas Operator | Dec 2009 |
| 39 | Petrowest Energy Co Inc | | Oil & Gas Operator | Dec 2022 |
| 40 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Feb 2024 |
| 41 | Rampart Energy Company | | Oil & Gas Operator | Dec 2022 |
| 42 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2024 |
| 43 | Rta Petroleum, LLC | | Oil Operator | Dec 2022 |
| 44 | RV Borchert Oil Producer | | Oil & Gas Operator | Dec 2022 |
| 45 | Singletree Resources Inc | | Oil & Gas Operator | Aug 2014 |
| 46 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 47 | Smith Red Plains Production | | Oil & Gas Operator | Dec 2022 |
| 48 | Soper Production | | Oil & Gas Operator | Dec 2011 |
| 49 | Tidal Wave Energy, Inc. | New Castle, PA 16105 | Oil & Gas Operator | Jun 2022 |
| 50 | Tri Family Oil Co | | Oil Operator | Dec 2022 |
| 51 | Vista Operating Inc | | Oil & Gas Operator | Dec 2014 |
| 52 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Apr 2024 |
| 53 | Walsh Production Inc | | Oil & Gas Operator | Nov 2008 |
| 54 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Jan 2024 |
| 55 | Wieser Oil LLC | | Oil & Gas Operator | Dec 2022 |
| 56 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2023 |
| 57 | Z & S Construction Co Inc | Kimball, NE 69145 | Oil & Gas Operator | Feb 2024 |
| 58 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Dec 2023 |