Business

Tim Cook Is Stepping Down as Apple CEO After 15 Years

By Mike Harper · April 21, 2026

After fifteen years and a $4 trillion valuation, Tim Cook is handing off Apple.

The company announced Monday that Cook will step down as chief executive on September 1, with John Ternus — currently Apple’s senior vice president of hardware engineering — set to succeed him. Cook will remain at Apple in an advisory role, according to Yahoo Finance, though the details of that arrangement were not fully disclosed in the announcement.

The transition marks the end of one of the most consequential runs in corporate history. Cook took over from Steve Jobs in August 2011, stepping into a role that many at the time considered nearly impossible to fill. What he built in the years since — methodically, operationally, without the theatrical product launches Jobs was famous for — was something arguably more durable: a business. Apple’s market capitalization at the time of Cook’s appointment was roughly $350 billion. He is leaving it at more than $4 trillion, the highest valuation any company has ever sustained.

His legacy is less about invention than execution. Cook transformed Apple from a product company into a services empire. The App Store, Apple Music, iCloud, Apple TV+, Apple Pay — none of those existed when he took over. Combined, Apple’s services segment now generates more than $100 billion annually and carries margins that hardware never could. He also built the supply chain infrastructure that allowed Apple to scale across the globe while absorbing shocks that would have crippled a less operationally rigorous company.

Ternus, his successor, has led hardware engineering at Apple since 2017 and is widely credited inside the company with overseeing the transition to Apple Silicon — the in-house chip architecture that transformed the Mac lineup and gave Apple independence from Intel. He is less publicly known than Cook, in the way that most engineers who ascend through product development rather than sales or communications tend to be. That relative anonymity may itself be a signal about what Apple’s board wants next: someone who stays inside the product and lets the work speak.

What Ternus inherits is a company at an inflection point. Apple is navigating its most significant technology transition since the iPhone — the shift toward AI-native computing, ambient intelligence, and the next generation of hardware form factors including the Vision Pro platform. Whether Apple leads that transition or follows competitors like Google, Microsoft, and OpenAI is the question that will define Ternus’s early tenure.

Cook’s departure was not unexpected in the broadest sense — he had been at the helm longer than most expected when he first took the job — but the timing and the choice of successor carry weight. September 1 lands before Apple’s traditional fall product cycle. Ternus will almost certainly be front and center for what comes next.