| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 401 | Mullen Exploration Inc | Oil & Gas Operator | Dec 2002 | |
| 402 | Mullins & Prichard | Oil & Gas Operator | May 1992 | |
| 403 | Munday Operating Co., L.L.C. | Oil & Gas Operator | May 2007 | |
| 404 | Munoco Co. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2021 |
| 405 | Murchison Oil & Gas Inc | Plano, TX 75024 | Oil & Gas Operator | Mar 2024 |
| 406 | Murexco Petroleum, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Oct 1996 |
| 407 | Murphrey Oil Co | Oil Operator | Jul 2024 | |
| 408 | Murphy - Sun | Oil & Gas Operator | May 1989 | |
| 409 | Murphy Exp & Prod Co.-USA | Oil & Gas Operator | May 2014 | |
| 410 | Murphy Exploration & Prod. Co. | Houston, TX 77094 | Oil & Gas Operator | Jun 2011 |
| 411 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 412 | Murray J. Evans | Oil Operator | Mar 1985 | |
| 413 | Muslow And Parker | Oil & Gas Operator | Jul 1994 | |
| 414 | Muslow Oil Industries | Oil Operator | Jan 1995 | |
| 415 | Mustang Energy Inc. | Porter, TX 77365 | Oil & Gas Operator | Mar 2008 |
| 416 | Mustang Energy L C | Oil & Gas Operator | Jan 2013 | |
| 417 | MVM Resources Louisiana L.L.C. | Oil & Gas Operator | Jul 2024 | |
| 418 | MVP Production Inc. | Oil & Gas Operator | Apr 2005 | |
| 419 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |