"We are thrilled to have Stephanie join Under Armour as President of our North American business," Under Armour President and COO Patrik Frisk said in a statement. "Her demonstrated record of leadership and retail expertise significantly strengthens our ability to further amplify Under Armour as the preeminent athletic performance brand in our home market."
In Under Armour's second-quarter results, the company said it expected North American sales to decline slightly in 2019, down from the previously projected flat. Sales in the region dropped 3.2% that quarter due to slower traffic.
The activewear retailer has been hard-pressed to compete with companies like Nike, Adidas and Lululemon, which are taking market share. The company's footprint in the activewear market in the U.S. shrunk to 5.6% from 6.4% through June compared with the same period a year earlier, according to The NPD Group.
Pugliese was previously president and CEO of Duluth Trading Company.
Under Armour shares, which are down nearly 9% over the past year, were up more than 2% Thursday morning, giving the company a market value of $8.7 billion.