Under Armour has a new fan — in the firm founded by the ‘Warren Buffett of Canada'

Core Viewpoint - Shares of Under Armour Inc. experienced an increase in after-hours trading following Fairfax Financial Holdings' continued investment in the company, which has faced stock struggles over the past year [1] Company Summary - Under Armour Inc. has seen its stock performance decline over the past year, indicating challenges in the market [1] - Fairfax Financial Holdings is actively building a significant stake in Under Armour, suggesting confidence in the company's future prospects [1]