Fortune Modern Board 25

The Modern Board 25 features the most innovative boards of directors among S&P 500 companies. It’s based on the belief that in a rapidly changing business climate, board innovation—and the high performance that comes with it—is predicated on who's in the room. As companies seek to drive change in talent strategy, diversity, sustainability, and social issues, they’ll need more diverse leadership at the very top. But they’ll also need the insight and strength that come with experience. With that in mind, Fortune collaborated with Diligent, a SaaS solution provider across global corporate governance, to develop the ranking—based on criteria that include the expertise, independence, diversity, and tenure of board membership. See our methodology here.