Apple is entering a new era. John Ternus officially takes the CEO chair on September 1, succeeding Tim Cook, who moves to the role of executive chairman after 15 years leading the company — and the clock is already ticking.

🇺🇸 Apple gets a new CEO tomorrow, and his first job is fixing the thing it somehow fell behind on: AI. John Ternus takes over from Tim Cook after 25 years building Macs, iPhones and AirPods, going from hardware chief to running the whole $4.6 trillion machine. Cook isn't… pic.twitter.com/Ggp6Youipa — Mario Nawfal (@MarioNawfal) August 31, 2026

Ternus, 51, joined Apple in 2001 and spent the last several years leading hardware engineering as senior vice president. That background shapes how he sees the job. He oversaw development of the iPhone, Mac, and a range of upcoming hardware products, some of which were delayed while Apple caught up on AI software. It is only the third CEO handover in Apple's modern history: Tim Cook took over from Steve Jobs in 2011, and the company has promoted from within both times — a continuity-focused approach that Ternus's elevation reinforces.

Apple stock (AAPL) closed Friday at $319.70. The company's market cap is creeping toward $5 trillion, sitting about 6% below its record high set in July. Over the past 12 months, the stock has climbed nearly 40%. A $5 trillion valuation would extend Apple's position among the most valuable publicly traded companies, a milestone no firm had reached before the AI-driven rally across mega-cap tech.

Tim Cook, who grew Apple's valuation 13-fold during his 15-year tenure, becomes executive chairman. He will continue managing Apple's relationships with President Donald Trump and the Chinese government, and has said he remains available to support Ternus when needed. Keeping those relationships in Cook's portfolio matters: China remains a critical manufacturing base and major market for Apple, while tariffs and trade policy have been recurring pressure points for the company's supply chain. Cook's transition was approved unanimously by Apple's board in April after months of internal planning.

September 9 Product Launch Is the First Big Test

Ternus's first public moment as CEO comes fast. Apple has a product launch scheduled for September 9 at its Cupertino campus. Expected on stage: the company's first foldable iPhone, new Apple Watches, and a rebuilt version of Siri.

The foldable iPhone puts Apple into a category rivals like Samsung have shipped for years, making this launch as much about catching up as innovating.

The new Siri is a major item. Apple rebuilt the assistant using Google's Gemini technology after facing criticism over the pace of its AI development. The deal is notable because Apple historically built its core software in-house and had positioned its own models as central to its AI strategy; leaning on a rival's technology marks a significant strategic shift. A leadership shake-up in the AI division preceded the change. Early reviews of the revamped Siri have been positive, according to Bloomberg.

Apple has also confirmed that macOS Golden Gate and updated Siri AI features will roll out by September 22.

IDC estimates Apple could capture 40% of the foldable device market by the end of 2027 if the launch lands well.

Analysts Are Watching Valuation and AI Spending

On the analyst side, the picture is mixed but leaning positive. Bank of America's Wamsi Mohan kept his Buy rating and $380 price target ahead of the leadership handover, expecting core hardware revenue to stay steady while Ternus works out how much to invest in AI infrastructure. The question of AI capital spending is one the whole industry is grappling with, as peers like Microsoft, Alphabet, and Amazon commit tens of billions of dollars to data centers — and Apple has so far spent far less than those rivals, leaving Ternus room to decide whether to close that gap.

Craig Moffett of Moffett Nathanson flagged the valuation risk. At 33 times forward earnings, there is not much room for a slow product cycle.

Wall Street's overall stance is a Moderate Buy, based on 16 Buy, 10 Hold, and 4 Sell ratings over the past three months. The average price target sits at $338.99, about 6% above the current trading price.

On the supply chain front, Apple is dealing with a chip shortage affecting memory and storage components. The company has cited this as a factor behind recent price increases and does not expect the issue to clear before next year.

What to watch next: the September 9 event and how the foldable iPhone and rebuilt Siri are received, the pace of Siri and macOS Golden Gate rollout by September 22, and any signs of how Ternus plans to reshape AI spending and leadership in his first quarter as CEO.