Adobe is searching for a new chief executive after CEO Shantanu Narayen said Thursday that he plans to step down after 18 years in the role. Narayen announced that he will step down once a successor is appointed. He will remain chair of the board. “Over the coming months, I will be working with Frank Calderoni, our lead director, and the board of directors to identify my successor and to ensure a smooth transition,” Narayen said in a memo to employees. On Thursday after the bell, Adobe reported financi ...