Apple's new CEO, John Ternus, takes over from Tim Cook after 15 years
Apple's new CEO John Ternus takes the helm of the iconic tech giant on Tuesday, ending Tim Cook's 15-year tenure during which the company’s value skyrocket to $4.6 trillion thanks to the iPhone’s enormous popularity.

TL;DR
- John Ternus will become Apple's new CEO on Tuesday.
- Tim Cook's 15-year tenure as CEO is concluding.
- During Cook's leadership, Apple's value increased to $4.6 trillion.
- The iPhone's popularity was a key factor in the company's growth.