Board of Directors, CEOs, Corporate governance, S&P500 More from: George Anderson, Julie Daum, Rebecca Thornton , Spencer Stuart George Anderson, Rebecca Thornton, and Julie Daum are Consultants at Spencer Stuart. This post is based on their 2025 U.S. Spencer Stuart Board Index. In a complex business environment, board composition continues to evolve, with boards now showing a greater preference for directors who have seasoned experience.