Tim Cook’s departure reflects a broader wave of CEO changes across U.S. corporations.

• In today’s CEO Daily: Diane Brady details how the leadership change at Apple aligns with the unprecedented rate of CEO departures this year.
• The major leadership story: Kevin Warsh is under scrutiny.
• The markets: Global gains driven by hope regarding U.S.-Iran peace negotiations.
• Additionally: All the latest news and office buzz from .

(SeaPRwire) –   Good morning. 2026 is proving to be a landmark year for CEO departures: Greg Abel has succeeded Warren Buffett at Berkshire Hathaway, Josh D’Amaro took over from Bob Iger at Disney, John Furner replaced Doug McMillon at Walmart, and now John Ternus is stepping in for Tim Cook at Apple. We highlighted Ternus as a possible successor back in October. Additionally, Cook is 65, which is a standard age for retirement. (For comparison, Buffett, Iger, and McMillon were 95, 75, and 59, respectively.) Yet, Apple’s news coincides with a series of other CEO shifts at Adobe, Coca-Cola, Dow, BP, and beyond. What is the reason behind this?  

The Velocity of AI: McMillon named the urgency surrounding AI as a key factor in his decision to step down, stating he didn’t believe he could complete the changes he began in time. James Quincey at Coca-Cola voiced similar thoughts when passing control to COO Henrique Braun. This effort is a sprint, not a marathon, and requires a top performer. As leadership consultant Stephen Miles noted: “Every company needs to run a quicker 800 meters every year, and you need a leader fit for that distance who has the stamina to see it through to the end.”

Protect Your Legacy: Staying in a role too long can severely tarnish a CEO’s legacy. This could be the reason Adobe CEO Shantanu Narayen felt it necessary to announce his resignation after 18 years, prior to identifying a successor. Tim Cook will depart Apple with a monumental legacy, having grown the company from a value of about $300 billion when Steve Jobs passed away in 2011 to $4 trillion today. However, Apple has also been slow to adapt to AI, leading to questions about whether Cook should continue to lead. (It is undoubtedly an advantage that Ternus is an engineer.)

Transformation Versus Turnaround: Amidst the chaos at the top, it is worth observing that leadership is primarily being passed to COOs who have a deep understanding of the business. In a turnaround, boards often recruit an outsider to shake up the culture, the team, and anything else needed to achieve results. In a transformation, the aim is to hasten change without tearing down the foundation. Generally, these are leaders who have a clear destination in mind. They may even have robust plans for getting there. But they understand that the old ways of doing business—from organizing talent to reaching customers—are shifting at a pace that necessitates a new captain at the helm.

Contact CEO Daily via Diane Brady at diane.brady@.com