| Brewery | Location |
|---|---|
| MadTree | Cincinnati |
| MadX | |
| Maeloc | |
| Magic Hat | South Burlington, Vermont |
| Magic road | Warsaw, Poland |
| Magic Rock | |
| Magnanimous | |
| Magnify Brewing | Fairfield |
| Magnify Brewing / Barreled Souls | |
| Magnolia Pub and Brewery | San Francisco, California |
| Magpie | |
| Mahmood Saeed Beverage Industry | |
| Mahou S.A. | Madrid, Spain |
| Main & Mill Brewing Co. | Festus, Missouri |
| Main Street Alehouse | Gresham, Oregon |