Mahou Group, the leading Spanish brewer, has upped its stake in the US-based craft beer maker Founders Brewing, increasing its holding to 90%, according to reports in Food Business African and FoodBev. Mahou Group originally took a 30% stake in the Michigan craft brewery in 2014 with a $96 million investment. Commenting on the deal, Founders Brewing president and co-founder Mike Stevens said: “We are fortunate to have a partner …