| 1 | Arbor Operating LLC | | Oil & Gas Operator | Mar 2024 |
| 2 | Arbor Resources LLC | | Oil & Gas Operator | Dec 2007 |
| 3 | Belden And Blake Corp Dba Ward Lake Energy | | Oil & Gas Operator | Jul 2020 |
| 4 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 5 | Breitburn Operating Limited Partnership | | Oil & Gas Operator | Aug 2022 |
| 6 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 7 | Core Energy LLC | | Oil & Gas Operator | Aug 2025 |
| 8 | Dart Oil & Gas Corporation | Mason, MI 48854 | Oil & Gas Operator | Jun 2018 |
| 9 | Delta Oil Co Inc | | Oil & Gas Operator | Oct 2023 |
| 10 | Dominion Midwest Energy Inc | | Oil & Gas Operator | Dec 2007 |
| 11 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 12 | Fortyfive Energy LLC | | Gas Operator | Jul 2025 |
| 13 | H And H Star Energy Inc Dba Petrostar Energy | | Oil & Gas Operator | Feb 2004 |
| 14 | Highmount Midwest Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 15 | Hound Resources LLC | | Oil & Gas Operator | Jul 2025 |
| 16 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |
| 17 | Jaguar Energy LLC | | Oil & Gas Operator | Jun 2022 |
| 18 | Jordan Development Company LLC | Traverse City, MI 49686 | Oil & Gas Operator | Jul 2025 |
| 19 | Lambda Energy Resources LLC | | Oil & Gas Operator | Aug 2025 |
| 20 | Layline Oil And Gas LLC | Marion, MI 49665 | Oil & Gas Operator | Aug 2025 |
| 21 | Lithos Exploration Inc | | Oil & Gas Operator | Nov 2014 |
| 22 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2025 |
| 23 | Maverick Exploration And Production Inc | | Oil & Gas Operator | Sep 2025 |
| 24 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 25 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 26 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | Oct 2025 |
| 27 | Muskegon Operating Company LLC | | Oil & Gas Operator | Aug 2025 |
| 28 | Omega Operating, Inc. | Odessa, TX 79769 | Oil & Gas Operator | Mar 2001 |
| 29 | Quicksilver Resources Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 30 | Riverside Energy Michigan LLC | | Oil & Gas Operator | Jul 2025 |
| 31 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 32 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 33 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | Jul 2025 |
| 34 | Savoy Exploration Inc | | Oil & Gas Operator | Feb 2020 |
| 35 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 36 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 37 | White Pine Production LLC | | Oil & Gas Operator | Aug 2025 |
| 38 | Wolverine Environmental Production Inc | | Oil & Gas Operator | Sep 2000 |