| 1 | A Miller Oil Company | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2023 |
| 2 | A S N F Producing Inc | N. Canton, OH 44720 | Oil & Gas Operator | Dec 2013 |
| 3 | A-W Wellman Limited | East Sparta, OH 44626 | Oil & Gas Operator | Dec 2001 |
| 4 | Ab Resources Oh LLC | Brecksville, OH 44141 | Oil & Gas Operator | Dec 2010 |
| 5 | Action Petroleum Inc | Atwater, OH 44201 | Oil & Gas Operator | Dec 1986 |
| 6 | Adobe Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 7 | Aim Energy LLC | North Canton, OH 44720 | Oil & Gas Operator | Dec 2023 |
| 8 | All States Oil & Producing Co Inc | Canton, OH 44702 | Oil & Gas Operator | Dec 2018 |
| 9 | Alliance Petroleum Corporation | Canton, OH 44718-2553-2553 | Oil & Gas Operator | Dec 2019 |
| 10 | Alsid Oil & Gas | Hanoverton,, OH 44423 | Oil & Gas Operator | Dec 2003 |
| 11 | Am-Tek Oil Inc | New Philadelphia, OH 44663 | Oil & Gas Operator | Dec 2022 |
| 12 | American Energy Associates Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 2023 |
| 13 | Amtex Oil & Gas Inc | Canton, OH 44711 | Oil & Gas Operator | Dec 2004 |
| 14 | Appalachian Energy Inc | Pittsburgh, PA 15220 | Gas Operator | Dec 2008 |
| 15 | Appalachian Expl Inc | Hartville, OH 44632-550-550 | Oil & Gas Operator | Dec 1992 |
| 16 | Artex Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Dec 2023 |
| 17 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 18 | Atlas Energy Group Inc | Uniontown, OH 44685-9575-9575 | Oil & Gas Operator | Dec 2011 |
| 19 | Atlas Noble LLC | Fort Worth, TX 76116-5423-5423 | Oil & Gas Operator | Jun 2020 |
| 20 | Atwood Energy Inc | Port Washington, OH 43837-9214-9214 | Oil & Gas Operator | Dec 1993 |
| 21 | Atwood Resources Inc | Houston, TX 72151-89-89 | Oil & Gas Operator | Dec 1993 |
| 22 | Autumn Ridge Enterprises LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2017 |
| 23 | Aw Tipka Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2023 |