| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Jan 2026 |
| 2 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2026 |
| 3 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 4 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Mar 2026 |
| 5 | Michigan Oil Company | FT Worth, TX 76117 | Oil & Gas Operator | Feb 1998 |
| 6 | Michigan Petroleum Exploration Inc | Oil & Gas Operator | Oct 2005 | |
| 7 | Miller Brothers | Oil & Gas Operator | Nov 2000 | |
| 8 | Miracle Petroleum LLC | Oil & Gas Operator | Oct 2018 | |
| 9 | Missaukee Oil And Gas Company LLC | Oil & Gas Operator | Dec 2025 | |
| 10 | Monroe James | Oil & Gas Operator | Oct 1997 | |
| 11 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | Mar 2026 |