Adobe (ADBE) CEO Shantanu Narayen is stepping down after 18 years in the role, the company announced on Thursday in conjunction with its first quarter earnings report. Adobe stock fell more than % on the news. Narayen will leave the post when a successor is found but will stay on as chair of the board afterward. The company's board also appointed Frank Calderoni, lead independent director of Adobe, as chair of the special committee that will look for CEO candidates both inside and outside of the firm. " ...