In a move that signals the close of one of the most influential leadership chapters in tech history, Tim Cook is stepping down as CEO of Apple, with longtime executive John Ternus set to take the helm.

The company announced Monday that Cook will transition into the role of executive chairman of Apple’s board, while Ternus will officially step in as CEO on September 1.

“It has been the greatest privilege of my life to be the CEO of Apple,” Cook said in a statement. “John Ternus has the mind of an engineer, the soul of an innovator, and the heart to lead with integrity. He is without question the right person to lead Apple into the future.”

A Leadership Era That Redefined Apple

When Cook took over in 2011 following the passing of Steve Jobs, he stepped into one of the most scrutinized roles in business.

What followed was a period of remarkable expansion. Under Cook’s leadership, Apple’s market value surged from approximately $350 billion to nearly $4 trillion, solidifying its position as one of the most valuable companies in the world.

Beyond the numbers, Cook helped evolve Apple into a more diversified and resilient company. From services to wearables, and from privacy leadership to sustainability initiatives, his tenure reshaped how Apple operates and competes on a global scale.

Just weeks before the announcement, Cook sat down with Michael Strahan on Good Morning America ahead of Apple’s 50th anniversary, reflecting on the company’s legacy.

“You can focus on the product moments, reinventing music, reinventing the smartphone, bringing creative arts to the table, saving people’s lives with the watch,” Cook said.

At the time, he dismissed speculation about stepping down, adding, “I love what I do deeply.”

“Twenty-eight years ago, I walked into Apple and I’ve loved every day of it since,” Cook said. “I can’t imagine life without Apple.”

John Ternus: From Engineer to CEO

For those inside Apple, the rise of John Ternus has been years in the making.

Ternus joined Apple in 2001 and steadily climbed the ranks, becoming Vice President of Hardware Engineering in 2013. Over the years, he has played a critical role in shaping some of Apple’s most important product lines, including the iPad, AirPods, and Apple Watch.

He also worked under Steve Jobs early in his career and later developed a close professional relationship with Cook, whom he considers a mentor.

“I am profoundly grateful for this opportunity to carry Apple’s mission forward,” Ternus said. “I am filled with optimism about what we can achieve in the years to come, and I am so happy to know that the most talented people on earth are here at Apple, determined to be part of something bigger than any one of us.”

His appointment signals continuity, with a strong emphasis on engineering-led leadership and product innovation.

What This Transition Means for Apple

Leadership transitions at Apple are rare, and when they happen, they tend to ripple across the entire tech industry.

Cook’s move to executive chairman ensures that his influence remains part of Apple’s strategic direction, while giving Ternus the space to define the company’s next chapter.

For Apple, this is not a reset. It is a calculated evolution.

As the company looks ahead, the focus will likely center on emerging technologies, including artificial intelligence, spatial computing, and the continued integration of hardware and software ecosystems.

The question now is not whether Apple will continue to lead, but how John Ternus will shape that leadership for the next generation.