| 1 | Antelope Resources Inc | Billings, MT 59101 | Oil & Gas Operator | May 2017 |
| 2 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 3 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Aug 2025 |
| 4 | Big Snowy Resources LP | Billings, MT 59105 | Oil Operator | Aug 2025 |
| 5 | Black Hawk Resources, LLC | Bowman, ND 58623 | Oil & Gas Operator | Jun 2011 |
| 6 | Bluebonnet Energy Corporation | Englewood, CO 80112 | Oil & Gas Operator | Sep 2015 |
| 7 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 8 | Charoil Co., J. Norm And Charlotte Sibley Dba | Roundup, MT 59072 | Oil Operator | Oct 2002 |
| 9 | Cirque Resources LP | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 10 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 11 | Cline Production Company | Billings, MT 59104 | Oil & Gas Operator | Jul 2025 |
| 12 | Delphi International, Inc. | Tulsa, OK 74104 | Oil Operator | Jul 2025 |
| 13 | Grand Resources, LTD. | Rockville, MD 20852 | Oil Operator | Jun 2025 |
| 14 | Great Plains Resources, Inc. | Nixon, TX 78140 | Oil & Gas Operator | Oct 2025 |
| 15 | Hinto Energy, LLC | Edwards, CO 81632 | Oil Operator | Mar 2017 |
| 16 | Jake Oil, LLC | Billings, MT 59101 | Oil Operator | Feb 2022 |
| 17 | Montana Energy Company, LLC | McAllen, TX 78501 | Oil & Gas Operator | May 2025 |
| 18 | Mountain States Resources Inc | Cut Bank, MT 59427 | Oil & Gas Operator | Oct 2000 |
| 19 | Nielco, Inc. | Billings, MT 59103 | Oil & Gas Operator | Apr 2002 |
| 20 | R & A Oil, Inc. | Billings, MT 59105 | Oil & Gas Operator | May 2025 |
| 21 | Retamco Operating Inc | Red Lodge, MT 59068 | Oil & Gas Operator | Aug 2025 |
| 22 | S & L Energy, Inc.C/O John D. Lawrence, Jr. | Fishtail, MT 59028 | Oil Operator | Jun 2025 |
| 23 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 24 | Sdoco, LLC | Highlands Ranch, CO 80129 | Oil Operator | May 2025 |
| 25 | Sun Coulee, LLC | Martinsdale, MT 59053 | Oil & Gas Operator | Jun 2025 |
| 26 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2025 |
| 27 | Tomahawk Oil Company, Inc. | Roundup, MT 59072 | Oil Operator | Jul 2025 |
| 28 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | Aug 2025 |
| 29 | Westech Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Mar 2011 |
| 30 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |