7. Under Armour

Founded: 1996

Maryland's Under Armour started out making performance apparel before branching out into (cleated) footwear in 2006, then off-field models in 2007. Once established in football, they built up a basketball roster starting with Brandon Jennings, who went straight from high school to Italy before being drafted by the Milwaukee Bucks, and are currently making inroads into the running market (which they tried to enter earlier) via their new Spine shoe.