John Ternus takes over as Apple CEO, ending Cook’s 15-year run

John Ternus officially took the helm as Apple's ↘ 0.52% chief executive officer on Tuesday, succeeding Tim Cook after a 15-year tenure that transformed the iPhone maker from a $350 billion company into a $4.6 trillion behemoth. Cook transitions to the role of executive chairman, where he will focus on engaging with policymakers worldwide.latimes+1

Ternus, 50, has spent 25 years at Apple and served as senior vice president of hardware engineering since 2021. He becomes the company's eighth CEO as part of a succession plan announced in April and unanimously approved by the board.anews+1

Cook's Legacy by the Numbers

Cook's run produced staggering returns. Apple's stock rose roughly 2,275% during his tenure, and the company's market capitalization grew from $347 billion to $4.6 trillion — an increase Bank of America calculated at $32 million per hour for 15 years. Annual sales nearly quadrupled from $108 billion to $416 billion, while profit grew more than fourfold to $112 billion. Cook built a services empire now generating more than $30 billion per quarter, with over 1.5 billion paid subscriptions across Apple's platforms.axios+1

"Not only did Cook create his own path of operational and supply chain success, but he also created a 'values-driven' culture within Apple," said Christopher Brown, a financial adviser at Synovus Securities, in comments to Reuters.reuters

In a farewell memo to staff on Monday, Cook struck an emotional tone. "Whatever there is to say about my success, I know it is all because of you," he wrote. "This place is proof that culture triumphs over everything".applemust

The AI Challenge Ahead

Ternus inherits a company that, for all its financial strength, has struggled to keep pace in artificial intelligence. OpenAI, Anthropic, and Alphabet's ↗ 0.78% Google have launched transformative AI products while Apple has faced delays revamping Siri and saw weak sales from its $3,499 Vision Pro headset.latimes+1

"AI is the single biggest challenge for Ternus. Apple needs to demonstrate that AI will be more than an app on the iPhone, more than Siri," said Brian Mulberry, chief market strategist at Zacks Investment Management.reuters

Ternus has already begun reorganizing Apple's hardware engineering division around a new AI platform and is leading the development of AI-focused wearables, smart glasses, and new home devices, according to Bloomberg. His first major test comes next week, when he is expected to headline Apple's annual product event on September 9.ktvn+2

A Familiar Playbook

Those who have worked alongside both leaders see continuity ahead. A longtime Apple executive described Ternus as a "Tim Jr." in style — "not a marketing ace" but "a product guy who is also politically savvy". Cook himself offered his successor a vote of confidence: "Few people understand what it takes to build products that change the world the way John does".finance.yahoo+1

Beyond AI, Ternus must navigate Apple's ongoing manufacturing shift away from China, manage regulatory pressure in Europe, and maintain the relationship with President Donald Trump that Cook carefully cultivated. As executive chairman, Cook is expected to remain central to those geopolitical efforts.abc7news+2