| Marks and Spencer | |
| Marlowe Artisinal Ales | |
| Marquette Harbor Brewery and Restaurant | Marquette, Michigan |
| Marshall Brewing Company | Tulsa, Oklahoma |
| Marshall Wharf Brewing Company | Belfast, Maine |
| Marston's | United Kingdom |
| Martin City Brewing Company | Kansas City, Missouri |
| Martin House Brewing Company | Fort Worth, Texas |
| Martin's | Belgium |
| Martini-Brauerei | Kassel, Germany |
| Maryensztadt | |
| Marz Community Brewing | Chicago |
| Marzoni's Brick Oven & Brewing Co | Duncansville, Pennsylvania |
| Mash House Restaurant and Brewery | Fayetteville, North Carolina |
| MashCraft Brewing | Greenwood, Indiana |