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John Ternus Takes Over as Apple CEO, Replacing Tim Cook

Science38 sourcesSep 1, 2026
CenterRigor 5138 sources

John Ternus officially took over as Apple's CEO on Tuesday, September 1, succeeding Tim Cook after his 15-year tenure. Ternus, previously the senior vice president of hardware engineering, has overseen the development of products including the iPhone, iPad, Mac, Apple Watch, AirPods, and Apple Vision Pro. Cook, who led Apple for 15 years, stated in an X post that he has enormous comfort in Ternus's leadership and will miss the work. Cook's tenure saw Apple's market capitalization grow from approximately $350 billion to $4.6 trillion, with stock prices rising nearly 2,300%. Ternus, who graduated with a Mechanical Engineering degree from the University of Pennsylvania in 1997, joined Apple in 2001. He is described as having the mind of an engineer, the soul of an innovator, and the heart to lead with integrity and with honor. Ternus faces challenges including Apple's position in the artificial intelligence race, where critics argue the company is trailing rivals. Apple's Siri AI feature was delayed, and the company is reportedly turning to Google's Gemini for its next generation of AI. Ternus will also need to navigate supply chain issues, including a memory chip crunch that has led to price increases on MacBooks and iPads, and manage relationships with policymakers, a role Cook excelled at, particularly with President Donald Trump. Cook will remain at Apple as executive chairman, a position that includes engaging with policymakers around the world.

What they agree on

  • John Ternus has replaced Tim Cook as Apple's CEO.
  • The transition took effect on Tuesday, September 1, 2026.
  • Tim Cook served as CEO for 15 years.
  • Ternus has a background in hardware engineering and has worked on key Apple products.

Where they split

  • Sources differ on the exact valuation of Apple at the end of Cook's tenure, with figures ranging from $4 trillion to nearly $5 trillion.
  • Coverage varies on the specific challenges Ternus faces, with some emphasizing the AI race and others supply chain issues and geopolitical relations.
  • Bloomberg and Reuters are among the outlets reporting on the CEO transition.
  • Business Insider provides details on Ternus's estimated net worth and personal hobbies.