Tim Cook’s 15-year run as Apple CEO ends today

August 31, 2026, marks Tim Cook's last day as chief executive of Apple ↗ 0.93%, capping a 15-year tenure that transformed the iPhone maker from a $350 billion company into a multi-trillion-dollar technology giant. On September 1, John Ternus, Apple's senior vice president of hardware engineering, will formally assume the CEO role, while Cook transitions to executive chairman of the board.pcmag+2

Apple announced the leadership change in April, when Cook, 65, said he would be "leaving the CEO job behind in September". The transition received unanimous board approval, and Cook spent the summer working closely with Ternus on the handover. Arthur Levinson, who served as non-executive chairman for 15 years, will become lead independent director on the same date.npr+1

The Amazon Comparison

The transition has drawn comparisons to Amazon's Amazon.com, Inc. ↗ 1.61% post-Bezos era. When Jeff Bezos stepped down as CEO in July 2021, handing the role to Andy Jassy, Amazon underperformed both the S&P 500 and Nasdaq-100 for a stretch, raising questions about whether founder-led companies lose momentum after a handoff. Some analysts are watching for a similar dynamic at Apple, though the circumstances differ: Cook was not a founder, and Ternus is a 25-year Apple veteran with deep institutional knowledge.pluang+1

AI as the Defining Challenge

Wall Street's immediate concern is artificial intelligence. Apple has been seen as a laggard among megacap peers in AI, and Ternus inherits a company that, as one podcast put it, either "brilliantly sat out the AI spending race" or "completely squandered its advantages". CNBC parent Comcast reported that Ternus will need to show investors how Apple can compete in AI, where rivals have moved faster. The BBC noted that AI represents "the big challenge" for the incoming CEO.bbc+2

When the succession was announced in April, Apple shares fell roughly 2.5%, though major Wall Street firms including Wedbush, Evercore, Citi, and Bank of America maintained buy ratings with price targets ranging from $315 to $350. In his resignation letter, Cook called Ternus "a brilliant engineer and thinker" who is "obsessed with every detail".fortune+1

What Comes Next

Ternus will join Apple's board upon becoming CEO and take over day-to-day executive authority. His background in hardware engineering — he oversaw Apple's silicon and device design teams — signals an emphasis on product-driven strategy during a period when the industry is being reshaped by AI. Whether that approach can sustain Apple's position atop the world's most valuable companies is the question investors will be answering in the months ahead.hrexecutive+2