Why Fortune 500 boards are splitting the chair and CEO roles — again

NEW YORK — American corporate governance has a short memory and a long pendulum. After a decade in which combining the chair and CEO jobs was sold as clarity — one leader, one throat to choke — a growing roster of Fortune 500 boards is splitting the roles again. The catalyst is not a single scandal. It is a stack of them, plus a shareholder base that has learned to vote the proxy.

Independent chairs are being pitched as adult supervision: someone who can run an executive session without the CEO setting the agenda, and someone who can manage succession before it becomes a crisis. Critics call it ceremonial, a title that looks good in an ISS report and changes little about the real power map. Both things can be true depending on the person in the seat.

What has changed is the labor market for directors. After a period of quiet, several high-profile chairs have been recruited from outside the usual alumni network — former operators, not just former bankers — and given mandates that include culture and risk, not only the calendar of the board dinner.

CEOs are not always pleased. A combined role is a status good as well as a management structure. But the companies moving first tend to be those that have already had a messy succession or a public fight with an activist. Prevention, in governance as in medicine, is easier to sell after the first hospitalization.

Investors should treat the split as a signal, not a solution. A weak independent chair is expensive stationery. A strong one is the cheapest risk control a board can buy.