On August 31, 2026, Tim Cook spent his last day as Apple’s CEO, handing the reins to John Ternus, the company’s former head of hardware engineering. Cook remains at Apple as executive chairman of the board but no longer holds operational control. Cook inherited a company worth just under $350 billion in August 2011 and leaves it valued at roughly $4.6 trillion — approximately a 13-fold increase. Revenue grew from $108 billion to $416 billion over the same period.
What you need to know
- Tim Cook served as Apple CEO from August 2011 to August 31, 2026; John Ternus, formerly head of hardware engineering, has taken over as CEO.
- Apple’s market capitalization grew from under $350 billion to roughly $4.6 trillion during Cook’s tenure — nearly 13×.
- Under Cook, Apple launched entirely new product categories including Apple Watch, AirPods, AirTag, HomePod, and Vision Pro, while expanding the iPhone lineup from one model per year to five current models.
- Notable failures during Cook’s era included the butterfly keyboard, the cancelled AirPower wireless charger, the troubled Apple Maps launch, and Vision Pro’s struggle to reach a mass audience.
The Apple Cook inherited
When Cook took over from Steve Jobs in August 2011, Apple’s product map was comparatively sparse: one flagship iPhone per year, a single iPad 2, a Mac lineup, and the fading iPod. It was already a massive and influential company, but by today’s standards its portfolio was almost minimalist.
Tim Cook is no longer Apple’s CEO
Over fifteen years, Cook transformed Apple from a maker of a handful of devices into a sprawling ecosystem. His strength was not in unveiling new categories on stage the way Jobs did, but in scaling operations, perfecting supply chains, and turning promising ideas into sustainable businesses. Under his leadership, Apple became the first company to cross the $1 trillion valuation mark, then $2 trillion, $3 trillion, and approached $5 trillion.
One iPhone became an entire lineup
The most visible change is in smartphones. In 2011, there was one iPhone per year and the only choice was storage capacity. The current lineup spans five models: iPhone 17, iPhone 17e, iPhone Air, iPhone 17 Pro, and iPhone 17 Pro Max — plus two previous-generation models (iPhone 16 and iPhone 16 Plus) still on sale. Buyers now choose not just storage but screen size, thickness, camera configuration, and device tier.
The iPhone lineup has grown substantially
The iPad followed a similar trajectory. From the lone iPad 2, the tablet range expanded to include the standard iPad, two iPad Air models, two iPad Pro models, and the compact iPad mini. The Apple Pencil arrived alongside them, turning the tablet from a content-consumption screen into a working tool for artists, designers, and note-takers.
The iPad lineup now has even more models than the iPhone
Many critics find these lineups overly complex, but the segmentation allowed Apple to cover every price tier and avoid ceding customers to competitors.
Entirely new product categories
Perhaps Cook’s most significant legacy is the product categories that did not exist before his tenure. Apple Watch became the world’s most popular smartwatch. AirPods now ship in multiple versions for different use cases and budgets. The compact AirTag tracker, HomePod and HomePod mini smart speakers, and the MacBook Neo budget laptop all arrived under Cook’s watch.
Apple Watch launched during Tim Cook’s tenure
A pivotal milestone was the transition of the Mac to Apple’s own processors. This step gave Apple’s laptops and desktops the performance and battery life that convinced many users to switch to Mac permanently. All-day battery life became the norm rather than an aspiration.
The affordable MacBook Neo — also a product of Tim Cook’s era
All of these devices are woven into a unified ecosystem: the watch connects to the phone, the phone to the computer, AirPods switch automatically between devices, and AirTag leverages a network of millions of iPhones worldwide to locate lost items.
Services, subscriptions, and notable failures
Under Cook, Apple evolved from a pure hardware maker into a services company. Apple Music, the bundled Apple One subscription, and the Apple TV+ streaming service all launched during his tenure. The services business has been Apple’s fastest-growing segment, providing steady revenue regardless of product-launch cycles.
Apple Music launched during Tim Cook’s tenure
But the Cook era was not without significant missteps. The butterfly keyboard in MacBook laptops frustrated users for years with sticky keys and expensive repairs. The Vision Pro headset failed to become a mass-market product due to its price and weight. Apple Maps at its iOS 6 launch was widely regarded as an embarrassment that damaged the service’s reputation for years. And the AirPower wireless charging mat was cancelled before it ever reached stores.
The AirPower wireless charger never reached consumers
These failures show that even the most disciplined company makes mistakes, but Apple’s ability to acknowledge errors and correct course has been a distinguishing trait.
Cook’s farewell and what comes next
The financial transformation speaks for itself. Apple’s market capitalization grew from just under $350 billion in August 2011 to approximately $4.6 trillion at the end of Cook’s tenure. Annual revenue reached $416 billion, up from $108 billion in 2011, with profits measured in tens of billions each quarter. Apple came close to becoming the first company to reach a $5 trillion valuation.
On his final day as CEO, Cook sent a letter to the entire Apple team. In it, he wrote:
Team,
Today is my last day as CEO of Apple. I always knew this moment would come, and still it’s hard to believe it’s here and that I’m writing these words. I love this company and the people behind it, and I couldn’t let this day pass without sending you a note to say how grateful I am for the warmth you’ve given me, for how you’ve shown up every single day, and most of all for the privilege of a lifetime to be your leader.
The truth is, whatever success I’ve had, I know it’s because of you. You brought out the best in me. In my entire life, I have never seen or worked with such an extraordinary group of people, and every day I see new proof of that.
There is something truly special about Apple. What I’m most proud of is something that could never be captured in any annual report. This place proves that culture matters more than anything else. We share a belief that what we build matters, and that we have both the opportunity and the responsibility to leave the world better than we found it. That purpose is part of what makes Apple exceptional. Apple helps nurture it, but I believe it lived in each of you long before you came here. It’s what brought you to this company and continues to drive the work you do every day. Together we’ve built something far greater than any of us could have imagined or done alone. And that is the secret of our success. We bring out the best in each other. We lift each other up. We were able to make our dent in the universe, as Steve once said, because of who we are and what we believe, because of what we value and how we see the world. How lucky we are. How lucky I am.
As you know, I’m not leaving Apple. But I am stepping away from a role I’ve loved with all my heart. I will miss this job in ways I can’t yet imagine, and at the same time I am completely at peace with my decision. I will miss leading you and being alongside you every step of the way, and yet I am immensely comforted by the fact that I am handing the helm to someone as brilliant, wonderful, and capable as John. Few people understand what it takes to build world-changing products the way John does, and I couldn’t be more excited about his leadership.
I hope you know how much I value you and what an honor it has been to be your CEO. Most of all, I hope you will continue to take pride in being part of this amazing place we call Apple, and that you will always give it your very best. When we bring our whole selves to this work, with care for each other and for the people we serve, there is no limit to the profound difference we can make.
I look forward to seeing you in my new role at Apple Park and around the world.
With everything I have and everything I am, always,
Yours,
Tim
Cook’s era ended at a peak. The next chapter belongs to John Ternus, and its first outlines will become visible very soon — Apple has already sent invitations for a September 9 presentation, which will be the first major event of the Ternus era.
