Billionaire Warren Buffett

Billionaire Warren Buffett

Scott Eells/Bloomberg

Baltimore, Maryland-based Under Armour Inc. was second in the peer group behind Gildan with a 52 percent rise, and Hanesbrands, based in Winston Salem, North Carolina, was third with a 46 percent gain, Fruit of the Loom, based in Bowling Green, Kentucky, is a unit of Berkshire Hathaway, run by billionaire Warren Buffett.