| 1 | Belden And Blake Corp Dba Ward Lake Energy | | Oil & Gas Operator | Jul 2020 |
| 2 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 3 | Core Antrim Company LLC | | Gas Operator | Feb 2026 |
| 4 | D T E Gas And Oil Co | | Gas Operator | May 2007 |
| 5 | Dominion Midwest Energy Inc | | Oil & Gas Operator | Dec 2007 |
| 6 | H L Brown Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 7 | Highmount Midwest Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 8 | HRF Exploration & Production LLC | Gaylord, MI 49734-0160 | Gas Operator | Apr 2026 |
| 9 | HRF Exploration & Production,Inc | Denver, CO 80237 | Oil & Gas Operator | Mar 2009 |
| 10 | Jet Exploration 1995-1 LLC | | Gas Operator | Jan 2000 |
| 11 | Jordan Development Company LLC | Traverse City, MI 49686 | Oil & Gas Operator | Feb 2026 |
| 12 | Lambda Energy Resources LLC | | Oil & Gas Operator | Mar 2026 |
| 13 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 14 | Northstar Energy LLC | | Gas Operator | Sep 2020 |
| 15 | Paxton Resources LLC | | Oil & Gas Operator | Mar 2026 |
| 16 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 17 | Riverside Energy Michigan LLC | | Oil & Gas Operator | Feb 2026 |
| 18 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 19 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2026 |
| 20 | Terra Energy LTD | | Oil & Gas Operator | Apr 2018 |
| 21 | Tiger Development LLC | | Oil & Gas Operator | Aug 2019 |
| 22 | V C P Michigan, LLC | | Oil & Gas Operator | Feb 2026 |
| 23 | Wolverine Environmental Production Inc | | Oil & Gas Operator | Sep 2000 |