| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 2 | Stovall Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 1998 |
| 3 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |