Today, August 31, 2026, marks Tim Cook’s final day as chief executive officer of Apple, closing out a tenure of nearly 15 years that transformed the company from a smartphone maker into one of the most valuable businesses in history. His successor, John Ternus, takes over as Apple’s next CEO on September 1, 2026.
From Steve Jobs’ Successor to Apple’s Longest-Serving CEO
Cook took charge on August 24, 2011, after Steve Jobs stepped down due to ill health, with Jobs passing away later that same year. Cook had already been a fixture at Apple for over a decade by that point. He joined the company in 1998 as senior vice president for worldwide operations, where he helped overhaul Apple’s supply chain and manufacturing processes, expertise that would prove critical as the company scaled globally. Business StandardBusiness Standard
Taking over from a founder as iconic as Jobs was widely seen as one of the toughest succession challenges in corporate history. Harvard Business School professor David Yoffie described stepping into that role as inherently daunting, given that Cook was following a legendary CEO. Fifteen years on, most agree Cook cleared that bar comfortably.
A Company Transformed by the Numbers
The financial trajectory under Cook’s leadership is staggering. Apple grew from a company valued at roughly $350 billion in 2011 to a technology giant that briefly touched a $5 trillion market capitalisation in July 2026. That works out to an average of around $243 billion in added market value every year for a decade and a half, effectively adding the entire value of the company he inherited roughly every 17 months.
Revenue growth followed a similarly dramatic path. Apple’s annual revenue climbed from about $108 billion in 2011 to nearly $400 billion. Along the way, the company returned more than $900 billion to shareholders and built its Services division into a business generating over $100 billion annually. Apple’s stock climbed more than 2,000% between August 2011 and Cook’s final day, far outpacing the S&P 500’s gain of over 500% in the same period.
Products and Innovation Under Cook
While Cook is often credited more for operational excellence than product invention, his tenure still produced a string of major launches. Under his leadership, Apple introduced the Apple Watch, AirPods, Apple Pay, Apple Music, Apple TV+, Apple Vision Pro and Apple Silicon, while growing its installed base to more than 2.5 billion active devices.
Cook also became known for standing firm on user privacy, most notably during his public standoff with the FBI. He clashed with the agency after it asked Apple to build a backdoor into an iPhone connected to the 2015 San Bernardino terror attack, a decision that shaped Apple’s privacy-first branding for years afterward.
Handing the Reins to John Ternus
Apple’s board approved the leadership transition following what the company described as a long-term succession planning process. John Ternus, who joined Apple in 2001 and has served as senior vice president of Hardware Engineering since 2021, was named as Cook’s successor. Apple’s own disclosures noted that Ternus brings extensive executive leadership experience across engineering, product design and innovation.
Speaking to Apple staff about the decision, Cook pointed to three reasons behind the timing, including the company’s strong recent performance, an incredible product roadmap, and Ternus’s readiness to take over. Cook also reassured staff that he remains healthy and energetic, and plans to stay actively involved at Apple in his new role.
Cook isn’t disappearing from the company entirely. He will remain at Apple as executive chair, assisting with select responsibilities including engagement with policymakers around the world.
What Comes Next for Apple
Ternus inherits a company at a pivotal moment. Apple is working to catch up on AI after falling behind rivals like Microsoft and Google, and is reportedly preparing to launch its most significant iPhone redesign in years, a foldable model expected shortly after Cook’s departure. Ternus is also expected to oversee the rollout of Apple’s long-rumored smart glasses and future AI-focused products.
Beyond product roadmaps, Ternus faces the task of reshaping a leadership team that has remained largely unchanged for over a decade. Cook was notable for retaining much of Apple’s senior leadership throughout his tenure, a stability that helped the company execute consistently, but one Ternus may need to revisit as Apple enters its next chapter.
As Cook exits the CEO role today, his legacy is largely defined by scale, discipline and execution rather than the visionary product leaps associated with Jobs. Whether Ternus charts a similarly steady course or pushes Apple in a bolder new direction remains one of the biggest open questions in tech heading into September.
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