After 15 years at the helm of the world’s most influential tech company, Tim Cook is officially stepping down. On September 1, 2026, he will hand the leadership of Apple to John Ternus, the company’s current Senior VP of Hardware Engineering. Cook, who succeeded Steve Jobs in 2011, leaves behind a company that has transformed from a premium hardware maker into a $4 trillion global powerhouse.
A Financial Titan
Under Cook’s leadership, Apple’s market capitalization grew tenfold. When he took over, the company was valued at roughly $350 billion; today, it sits at $4.01 trillion. Despite navigating a global pandemic and geopolitical friction between the U.S. and China, Cook oversaw a nearly 700% increase in net income, reaching $112 billion in fiscal 2025. He leveraged his expertise in operations to master the global supply chain, significantly expanding Apple’s retail presence and manufacturing footprint in China.
Diversifying the Ecosystem
While Steve Jobs defined the iPhone era, Cook built the massive ecosystem that surrounds it. His tenure was marked by the launch of entirely new product categories and a massive pivot toward services.
Hardware and Silicon
- Wearables: The Apple Watch (2015) and AirPods (2016) redefined the health and audio markets.
- Apple Silicon: In 2020, Cook initiated the transition away from Intel to in-house Apple Silicon, drastically improving Mac performance and efficiency.
- Spatial Computing: The 2024 launch of the Apple Vision Pro marked a bold entry into AR/VR, though it has struggled with high costs and slow consumer adoption.
The Services Revolution
Cook turned Apple into a recurring revenue machine. The services segment—including Apple Pay, Apple Music, and Apple TV+—generated over $109 billion in 2025 alone. From the 112 million subscribers on Apple Music to the Academy Award-winning content on TV+, services have become central to Apple’s identity.
The Final Frontier: AI and Infrastructure
As Cook exits, Apple is navigating the generative AI era. While the company launched Apple Intelligence in 2024, it has faced delays in revamping Siri and recently partnered with Google to integrate Gemini into its toolset.
Cook’s legacy is also etched in stone—and silicon. He oversaw the completion of the 100% renewable Apple Park headquarters and recently committed $600 billion to U.S. investment, focusing on domestic semiconductor manufacturing. He leaves John Ternus a company that is more profitable, more diverse, and more deeply integrated into daily life than ever before.
