| 1 | M & G Oil Inc | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 2 | Mad Dog Oil Co. | | Oil Operator | Mar 2016 |
| 3 | Mad Operators LLC | | Oil & Gas Operator | Jun 2025 |
| 4 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 5 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Jun 2025 |
| 6 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 7 | Mar-Lou Oil Co., LLC | Wilson, KS 67490 | Oil Operator | Jun 2025 |
| 8 | Marker Oil Compa | | Oil Operator | Jul 1985 |
| 9 | Martin J S Oil O | | Oil & Gas Operator | Apr 1991 |
| 10 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 11 | McNeish Oil Operations | | Oil Operator | Nov 2019 |
| 12 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 13 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Jun 2025 |
| 14 | Messman-Rinehart | | Oil & Gas Operator | Mar 1991 |
| 15 | Michaelis Leo Oi | | Oil Operator | Aug 1991 |
| 16 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Dec 2025 |
| 17 | Midway Drilling | | Oil & Gas Operator | Dec 1996 |
| 18 | Midway Operating Co. | Great Bend, KS 67530 | Oil Operator | Jan 1998 |
| 19 | Migwis | Great Bend, KS 67530 | Oil Operator | Mar 1988 |
| 20 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Jun 2025 |
| 21 | Molitor Oil, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Jun 2025 |
| 22 | Morgenstern Oil Operations LLC | Ellinwood, KS 67526 | Oil Operator | Jun 2025 |
| 23 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Dec 2025 |
| 24 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 25 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 26 | Murfin Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2025 |
| 27 | Musgrove Petrole | | Oil & Gas Operator | Dec 1996 |
| 28 | Mustang Drilling | | Oil & Gas Operator | Nov 1996 |
| 29 | Mustang Energy Corporation | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 30 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 31 | MW Oil, Inc | | Oil & Gas Operator | Jun 2025 |