| 1 | Alta VIsta Oil Corporation | Clearmont, WY 82835 | Oil & Gas Operator | Jul 2021 |
| 2 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Feb 2024 |
| 3 | Briscoe Petroleum, LLC | Sheridan, WY 82801 | Oil & Gas Operator | Feb 2024 |
| 4 | Diamond Oil & Gas LLC | Casper, WY 82604 | Oil & Gas Operator | Feb 2024 |
| 5 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Feb 2024 |
| 6 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2024 |
| 7 | Hawkins, Robert S. | Kevin, MT 59454 | Oil Operator | Jun 2018 |
| 8 | Highline Exploration, Inc. | Tuscaloosa, AL 35402 | Gas Operator | Nov 2020 |
| 9 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Apr 2024 |
| 10 | Macum Energy Inc | Billings, MT 59104 | Oil & Gas Operator | Aug 2021 |
| 11 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 12 | Pinnacle Gas Resources, Inc. | Sheridan, WY 82801 | Gas Operator | Mar 2011 |
| 13 | R & N Associates,Etal Glen Neubert, Agent | Dallas, TX 75244-5100 | Oil Operator | Sep 2005 |
| 14 | Redstone Gas Partners LLC | Denver, CO 80202 | Gas Operator | Mar 2001 |
| 15 | Rocky Mountain Operating Co Inc | Littleton, CO 80121 | Oil & Gas Operator | Dec 2011 |
| 16 | Shadco | Worland, WY 82401 | Oil & Gas Operator | Jan 2024 |
| 17 | Smith, Loren E. And Foster, Chas. P. | Broomfield, CO 80020 | Oil Operator | Jan 2024 |
| 18 | Soap Creek Associates, Inc. | Broomfield, CO 80020-2995 | Oil Operator | Jan 2024 |
| 19 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 20 | Storm Cat Energy (USA) Operating Corporation | Denver, CO 80202 | Gas Operator | Jun 2017 |
| 21 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |
| 22 | Ursa Major (Crow Og), LLC | Billings, MT 59101 | Gas Operator | Aug 2017 |
| 23 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |