John Ternus officially became Apple’s chief executive on Tuesday, succeeding Tim Cook after 15 years at the helm of the world’s most valuable technology companies.
John Ternus took over as Apple’s CEO on Tuesday, marking the beginning of a new leadership era after Tim Cook spent 15 years running the technology giant.
Ternus, Apple’s former senior vice president of hardware engineering, succeeds Cook as the company enters a period of significant technological and operational challenges. Cook will remain involved as Apple’s executive chairman, providing continuity as the leadership transition takes place.
Cook became Apple CEO in 2011, following the death of co-founder Steve Jobs. During his tenure, Apple grew from a company valued at roughly $350 billion to more than $4.5 trillion, while annual sales reached $416 billion in 2025 and profit rose to $112 billion, according to Reuters.
Much of Cook’s success came from strengthening Apple's global supply chain, expanding production and developing businesses beyond the iPhone. Services, wearables such as the Apple Watch and AirPods, and other products helped broaden Apple's revenue base.
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Apple has faced criticism for moving more slowly than rivals in the development of generative AI and related technologies. The company has been working to improve Siri and its broader Apple Intelligence platform as competitors race to integrate increasingly capable AI systems into consumer products and services.
The company is in a new environment. It’s going to have to keep evolving and competing,” Kathy Gersch, CEO of consulting firm Kotter, said, highlighting the challenge facing the new leadership.
Apple is also dealing with higher memory costs and broader supply-chain pressures. Rising component costs could put pressure on margins or increase the prices of some devices if the company is unable to absorb the additional expense.
The timing of Ternus' appointment also puts the new CEO immediately in the spotlight ahead of Apple's next major product event. The company is scheduled to unveil its latest iPhone lineup on September 9, in what will be Ternus first major product launch appearance as CEO.
For investors, the leadership change represents a transition from Cook's operations focused tenure to a new period in which Apple's ability to compete in AI could become increasingly important.
Ternus' background in hardware could help maintain Apple's strength in product development, but his biggest challenge will be balancing that expertise with the need to accelerate the company's AI strategy while managing costs, supply chain risks and Apple's enormous existing business.
The transition therefore comes at a critical point for Apple: the company enters the Ternus era from a position of enormous financial strength, but faces a technology landscape that is changing faster than at any point in its recent history.
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