| Brewery | Location |
|---|---|
| Lynwood Brewing Concern | Raleigh |
| Lyons Brewing | Lincolnton, NC |
| L’échasse | |
| M.I.A. Brewing Company | |
| Ma Brasserie | Montréal, Canada |
| Maallust | Veenhuizen, Netherlands |
| MaBrasserie | Montréal , Canada |
| Mac and Jack's Brewery | Redmond, Washington |
| MacAuslan Brewing | Montreal, Canada |
| Machine House Brewing | Seattle |
| Mackinnon Brothers Brewing | Bath, Canada |
| Macks Ølbryggeri | Tromsø |
| Maclay and Co. | Clackmannan, United Kingdom |
| Maclean's Ales Inc. | Hanover, Canada |
| Macleod Ale Brewing Co. | Van Nuys, California |