| 1 | Annex Oil Corp | | Oil & Gas Operator | Jun 2000 |
| 2 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 3 | Arbor Operating LLC | | Oil & Gas Operator | Mar 2024 |
| 4 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 5 | Austin Energy LLC | | Oil Operator | Jun 2025 |
| 6 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
| 7 | Bell And Gault Drilling Inc | | Oil & Gas Operator | Apr 2001 |
| 8 | Center Dean Dba Center Operating Co | | Oil & Gas Operator | Jul 2003 |
| 9 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 10 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Jul 2025 |
| 11 | Countrymark Energy Resources, LLC | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2023 |
| 12 | Dominion Midwest Energy Inc | | Oil & Gas Operator | Dec 2007 |
| 13 | Don Yohe Enterprises Inc. | Armada, MI 48005 | Oil & Gas Operator | Apr 2018 |
| 14 | Fleeharty Willie W | | Oil & Gas Operator | Jun 1991 |
| 15 | General Exploration Inc | | Oil & Gas Operator | Aug 2001 |
| 16 | General Oil Company, Inc. | Wichita, KS 67213 | Oil & Gas Operator | Jul 2025 |
| 17 | Haischer James W Dba Haischer James W And Assoc | | Oil & Gas Operator | Dec 2001 |
| 18 | Houseknecht Oil Producers Inc | | Oil & Gas Operator | Dec 1994 |
| 19 | Investment Land Services Inc | | Oil Operator | Oct 2001 |
| 20 | Jonesville Ventures Inc | | Oil & Gas Operator | May 1988 |
| 21 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 22 | Lease Management Inc | | Oil & Gas Operator | May 2025 |
| 23 | Lease Management Inc And McClure Oil Co | | Oil & Gas Operator | Apr 1991 |
| 24 | Lease Management Inc And Patrick Petroleum Corp | | Oil & Gas Operator | Apr 1991 |
| 25 | M K M LTD | | Oil & Gas Operator | Jun 1998 |
| 26 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | May 2025 |
| 27 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 28 | Meridian Resources, LLC | Evansville, IN 47715 | Oil Operator | Jul 2024 |
| 29 | Mid Atlantic Oil Co | Hillsdale, MI 49242 | Oil & Gas Operator | Dec 1999 |
| 30 | Miller Brothers | | Oil & Gas Operator | Nov 2000 |
| 31 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 32 | North American Exploration Co. | Abilene, TX 79602 | Oil & Gas Operator | Apr 1998 |
| 33 | Paragon Oil Co | | Oil & Gas Operator | Oct 1991 |
| 34 | Patrick Petroleum Corp Of Michigan | | Oil & Gas Operator | Nov 1993 |
| 35 | Perry C A And Son Inc | | Oil & Gas Operator | Dec 1994 |
| 36 | R S E C LLC | | Oil & Gas Operator | Nov 2002 |
| 37 | Rainbow Oil And Gas Inc | | Oil & Gas Operator | Jun 2016 |
| 38 | Reservoir Research Corp | | Oil Operator | Dec 2009 |
| 39 | Rovsek Adolph E | | Oil & Gas Operator | Oct 1991 |
| 40 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | May 2025 |
| 41 | Sherred Homer G And Fleeharty Willie W | | Oil & Gas Operator | Jun 1991 |
| 42 | Trolz Glynn And Associates Inc | | Oil & Gas Operator | Apr 1995 |
| 43 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 44 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 45 | Wolverine Environmental Production Inc | | Oil & Gas Operator | Sep 2000 |