| 1 | Adler Energy LC | | Oil Operator | May 2017 |
| 2 | Beckman Production Services Inc | | Oil Operator | Aug 2025 |
| 3 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 4 | Bob Adams And Associates Inc | | Oil & Gas Operator | Dec 1998 |
| 5 | Century Oil Company Inc | | Oil Operator | Dec 2024 |
| 6 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 7 | Dart Oil & Gas Corporation | Mason, MI 48854 | Oil & Gas Operator | Jun 2018 |
| 8 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 9 | H And H Star Energy Inc Dba Petrostar Energy | | Oil & Gas Operator | Feb 2004 |
| 10 | Howard Energy Co Inc | | Oil & Gas Operator | Aug 2011 |
| 11 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2025 |
| 12 | Layline Oil And Gas LLC | Marion, MI 49665 | Oil & Gas Operator | Aug 2025 |
| 13 | Lease Management Inc | | Oil & Gas Operator | Jul 2025 |
| 14 | Lucas George C | | Oil Operator | Jul 2014 |
| 15 | Mid Michigan Gas Storage Co | | Oil & Gas Operator | Mar 2022 |
| 16 | Miller Energy Company II LLC | | Oil & Gas Operator | Aug 2025 |
| 17 | Missaukee Oil And Gas Company LLC | | Oil & Gas Operator | Jun 2025 |
| 18 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | Oct 2025 |
| 19 | Muskegon Operating Company LLC | | Oil & Gas Operator | Aug 2025 |
| 20 | Newstar Energy USA Inc | Thornville, OH 43076 | Oil & Gas Operator | Aug 2004 |
| 21 | Northshore Petroleum LLC | | Oil Operator | Feb 2009 |
| 22 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 23 | Presidium Energy LC | | Oil & Gas Operator | Jul 2016 |
| 24 | Ranch Production LLC | | Oil & Gas Operator | Jul 2025 |
| 25 | Trahan Petroleum Inc | | Oil Operator | Jul 2025 |
| 26 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 27 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 28 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 29 | Winterfield Corp | | Oil Operator | Nov 2024 |
| 30 | Yost Energy Inc | | Oil & Gas Operator | Aug 2025 |