Founder Kevin Plank will return as Under Armour President & CEO after more than four years, replacing Stephanie Linnartz on April 1. Linnartz, former president of hotel chain Marriott International, has led the company for just over a year . She also will "step down as a board member." Under Armour "did not give a reason for the abrupt management shake-up." Mohamed El-Erian , an independent director since 2018 and lead director since 2020, will become the board’s non-executive chair. Plank, now Exec Chair and Brand Chief, will move to "serve on the board as a director." Linnartz "will remain as an adviser" through April 30. Linnartz had said shortly after joining the company that she "envisioned a three-year plan," Protect this House 3, to "strengthen the brand in the United States, boost U.S. sales growth and elevate the design of footwear, women’s apparel and 'sportstyle' products" ( BALTIMORE SUN, 3/13 ).