Lights illuminate a Reebok sign outside a FitHub store, operated by Reebok, a unit of Adidas AG, in London, U.K., on Monday, Nov. 3, 2014. A group led by a Hong Kong-based private-equity investor is preparing an offer for Adidas's Reebok unit, people familiar with the matter said last month. Photographer: Jason Alden/Bloomberg via Getty Images