CEO/Chair Leadership: When and Why Boards Combine or Separate the Roles

A Conference Board report posted on the Harvard Law School Forum examines CEO/chair leadership structures across S&P 500 and Russell 3000 companies, finding that in 2025 the current CEO served as chair at 42% of S&P 500 companies, and that combination disclosures increasingly emphasize board-management alignment and strategic execution rather than CEO expertise alone. It underscores that leadership structure is context-dependent, and that the quality of independent oversight — including how agendas are set and how the lead independent director role is defined — matters more than the formal title split. For SEA founders and scale-up CEOs weighing whether to hold or separate the chair role, this data-rich piece offers practical benchmarks and disclosure guidance to manage investor and stakeholder expectations.