Investing.com -- Today marks the end of an era in Silicon Valley as Tim Cook’s 15-year tenure as Apple’s CEO officially concludes, passing a $4.67 trillion legacy to longtime hardware chief John Ternus. With Apple (NASDAQ: AAPL) shares trading near $320 today ahead of Ternus’s official September 1 debut, the market is closely watching the handover. Every strategic move the incoming CEO makes—from scaling Apple Intelligence to pricing the next iPhone—will immediately test a stock that has already surged roughly 40% over the past 12 months.

A Legacy of Operational Mastery

Cook moves to the role of executive chairman to focus on global policymaking, wrapping up a chapter defined by unparalleled supply chain execution and category creation.

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  Annual revenue quadrupled from $108 billion in fiscal 2011 to $416 billion in 2025.

  
  


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  Cook oversaw the launch of the Apple Watch, AirPods, and the pivotal Apple Silicon transition.

  
  


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  The Services segment alone now generates over $100 billion annually.

  
  

"It has been the greatest privilege of my life to be the CEO of Apple," Cook stated in his April 2026 announcement. "I love Apple with all of my being."

The Day-One Agenda for Ternus

Ternus, a 25-year Apple veteran who has led hardware engineering since 2021, inherits a company under immense pressure to prove its software and AI ambitions match its hardware pedigree. He has already introduced an internal AI platform to accelerate product development, signaling that artificial intelligence is his primary strategic focus. Concurrently, a reported layoff of at least 60 employees from the Vision Pro and VR teams points to a strategic pivot toward lighter-form-factor smart glasses, anticipated for WWDC 2027.

The Immediate Test

Ternus’s first major act will be hosting Apple’s fall product launch event on September 9, where the newest iPhone series and a potential foldable phone will debut. Investors will also be watching Services gross margin guidance closely: any expansion beyond the 70% range or an uptick in iPhone average selling prices will signal a push toward a higher-multiple business mix.

Long-term, the handling of the Apple Intelligence roadmap and Siri’s evolution will define the Ternus era. As a hardware engineer by trade, how he navigates these software hurdles—and whether services chief Eddy Cue receives expanded authority—will be just as critical to Apple’s valuation multiple as any future hardware cycle.