Under Armour jumps as Fairfax Financial acquires 22% stake

Shares of sportswear maker Under Armour UAA.N jump 2.2% at $5.54 premarket

Fairfax Financial discloses sizable stake as it holds ~42 mln UAA shares, or 22% of total, as of December 30

Move comes as UAA seeks rebound after challenging year, marked by split with NBA star Stephen Curry and a 40% stock slump amid revenue decline

UAA stock down 35.1% over the past year