Two months after its unexpected artificial intelligence rebrand, Allbirds is changing its name to Smartbird and appointing a new chief executive. The shoemaker-turned- AI infrastructure firm on Wednesday named Nadia Carlsten as CEO and board member, replacing current CEO Joe Vernachio. Carlsten previously served as CEO at the Danish Center for AI Innovation , an AI infrastructure company partnered with Nvidia and home to a supercomputer known as Gefion. Shares of BIRD soared 34% on Wednesday.