| 1 | Arbor Petroleum Inc | | Oil Operator | Jan 2003 |
| 2 | C M S Gas Transmission Co | | Oil & Gas Operator | Dec 2020 |
| 3 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 4 | Comerica Properties Corp | | Oil Operator | May 1985 |
| 5 | Consumers Energy Co | | Oil & Gas Operator | Apr 2010 |
| 6 | Dominion Midwest Energy Inc | | Oil & Gas Operator | Dec 2007 |
| 7 | Energex Petroleum Inc | | Oil Operator | Sep 2019 |
| 8 | Gout Margaret M Dba Lakeville Gas Associates | | Oil & Gas Operator | Dec 2003 |
| 9 | Greenland Operating LLC | | Oil Operator | Mar 2025 |
| 10 | Hawkins Oil Of Michigan Inc | | Oil & Gas Operator | Aug 2003 |
| 11 | Hound Resources LLC | | Oil & Gas Operator | Jul 2025 |
| 12 | Howard Energy Co Inc | | Oil & Gas Operator | Aug 2011 |
| 13 | Jordan Development Company LLC | Traverse City, MI 49686 | Oil & Gas Operator | Jul 2025 |
| 14 | Jordan Energy Exploration Co LLC | | Oil Operator | Dec 2022 |
| 15 | K C S Michigan Resources Inc | | Oil & Gas Operator | Mar 2004 |
| 16 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 17 | Kelly Oil And Gas Inc | | Oil & Gas Operator | Mar 1999 |
| 18 | Meridian Resources (USA) Inc. | | Oil & Gas Operator | Aug 2024 |
| 19 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 20 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 21 | Nuenergy LLC | | Oil & Gas Operator | Jul 2025 |
| 22 | Onco Petroleum USA Inc | | Oil Operator | Dec 2009 |
| 23 | Riverside Energy Michigan LLC | | Oil & Gas Operator | Jul 2025 |
| 24 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 25 | Samson Natural Gas Co | | Oil & Gas Operator | Oct 1992 |
| 26 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 27 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | Jul 2025 |
| 28 | Scandia Energy Co Inc | Traverse City, MI 49684 | Oil & Gas Operator | Dec 1993 |
| 29 | Somoco Inc | | Oil & Gas Operator | Jun 2025 |
| 30 | Southern Energy Operating Co Inc | | Oil Operator | Jun 2025 |
| 31 | Sturgeon Point Development Co | | Gas Operator | Jun 2019 |
| 32 | T I Energy Services Inc | | Oil & Gas Operator | Dec 2003 |
| 33 | Wellmaster Production Co LLC | | Oil & Gas Operator | Jul 2015 |
| 34 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 35 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 36 | Wolverine Environmental Production Inc | | Oil & Gas Operator | Sep 2000 |