| Matt's Burning Rosids | Stone Brewing Co. | Saison | 10.5% |
| Mattina Rossa | Allagash Brewing Company | Wild Ale | 6.6% |
| Mattrazzo | Plan Bee Farm Brewery | Saison | |
| Matt’s Sleepy Time Belgian Imperial Stout | Beau's All Natural Brewing Co. | American Imperial Stout | 8.0% |
| Matuška Apollo Galaxy | Minipivovar Matuška Broumy (Matuska) | | 5.5% |
| Matuška IPA Raptor Super Dry | Minipivovar Matuška Broumy (Matuska) | American IPA | 6.2% |
| Maudite | Unibroue | Belgian Dark Strong Ale | 8.0% |
| Maui Coconut Porter | Maui Brewing Co. | American Porter | 5.7% |
| Maverick & Gose | Amsterdam & Great Lakes Collab | Gose | 5.9% |
| Mavericks Amber Ale | Half Moon Bay Brewing | American Amber / Red Ale | 4.8% |
| Maximator | Augustiner-Bräu München | Bock | |
| Maximilian | Urban Chestnut Brewing Company | Weizenbock | 7.0% |
| Maximilian (Max) Russian Imperial Stout | Vintage Brewing Company | Russian Imperial Stout | 9.2% |
| Maximum Manhattan | Kuhnhenn Brewing | | 14.0% |
| Maximus | Lagunitas Brewing Company | Imperial IPA | 8.4% |