Founders Brewing Company, is a brewery in Grand Rapids, Michigan, known for producing several highly rated and award-winning craft-style ales, including KBS (Kentucky Breakfast Stout), Centennial IPA, Dirty Bastard, and Founders Porter. Since its founding as a craft brewery in the mid 1990s, it has grown to become the 15th largest brewery in the United States, and a prominent member of the West Michigan brewing industry.