| 1 | Baldwin And Baldwin Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Aug 1993 |
| 2 | Benchley Donald P And Benchley Jeffrey P | | Oil Operator | Dec 2020 |
| 3 | Center Dean Dba Center Operating Co | | Oil & Gas Operator | Jul 2003 |
| 4 | Dominion Midwest Energy Inc | | Oil & Gas Operator | Dec 2007 |
| 5 | Haischer James W Dba Haischer James W And Assoc | | Oil & Gas Operator | Dec 2001 |
| 6 | Hilden Oil Co Inc | | Oil & Gas Operator | Oct 2024 |
| 7 | Jordan Development Company LLC | Traverse City, MI 49686 | Oil & Gas Operator | Jul 2025 |
| 8 | Lease Management Inc | | Oil & Gas Operator | Jul 2025 |
| 9 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2025 |
| 10 | McConnell And Scully Inc | | Oil & Gas Operator | Aug 2025 |
| 11 | Meridian Production Services LLC | | Oil & Gas Operator | Jun 2025 |
| 12 | Miller Brothers | | Oil & Gas Operator | Nov 2000 |
| 13 | Newstar Energy USA Inc | Thornville, OH 43076 | Oil & Gas Operator | Aug 2004 |
| 14 | Paragon Oil Co | | Oil & Gas Operator | Oct 1991 |
| 15 | Paxton Resources LLC | | Oil & Gas Operator | Aug 2025 |
| 16 | Petco Petroleum Corp | Hinsdale, IL 60521 | Oil & Gas Operator | Jun 2025 |
| 17 | Pure Oil Co | | Oil & Gas Operator | Dec 1996 |
| 18 | Quality Hospitality Services LLC | | Oil & Gas Operator | Mar 2013 |
| 19 | R S E C LLC | | Oil & Gas Operator | Nov 2002 |
| 20 | Rovsek Adolph E | | Oil & Gas Operator | Oct 1991 |
| 21 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | Jul 2025 |
| 22 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 23 | Staton Petroleum Inc | | Oil & Gas Operator | Dec 1994 |
| 24 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 25 | Trolz Glynn And Associates Inc | | Oil & Gas Operator | Apr 1995 |
| 26 | Turner Petroleum Corp And Patrick Petroleum Corp | | Oil & Gas Operator | Mar 1991 |
| 27 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 28 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 29 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 30 | Wolverine Environmental Production Inc | | Oil & Gas Operator | Sep 2000 |