Beyond Nvidia: 5 AI 'Power Play' Stocks That Skyrocketed Over 200% in 2025

While Nvidia captured the headlines with its $4.6 trillion market cap, savvy investors who looked deeper into the AI data center ecosystem reaped even bigger rewards in 2025. If Nvidia's GPUs are the brains of AI, the companies building the bones and circulatory system saw their stocks soar, with some posting gains of over 300% this year alone.

The $380 Billion AI Infrastructure Gold Rush

The AI boom's biggest winner wasn't a single company. With the top four tech giants projecting a collective $380 billion in spending on data centers and infrastructure this year—a figure expected to grow—Wall Street has poured money into the vendors selling the 'picks and shovels.' Makers of memory, storage, fiber-optic cables, and other essential enterprise hardware have rocketed in value, driven by the insatiable demand to power the AI craze.

2025's Market-Crushing Performers

Five companies, in particular, delivered spectacular returns. Optical parts maker Lumentum led the pack with a stunning 361% jump. Storage giant Western Digital surged 296%, while competitor Seagate and memory producer Micron both climbed 228%. Not far behind, network switch maker Celestica posted a 213% gain.

Can the Rally Continue in 2026?

The key question now is what's next. After such massive rallies, lofty expectations are baked into these stock prices. According to LSEG, revenue growth for most of these companies is projected to slow in fiscal years 2026 and 2027. Micron, for instance, is expected to see revenue almost double in its current fiscal year before slowing dramatically to 24% growth in 2027 and less than 1% in 2028. Investors will be scrutinizing these names closely in 2026 to see if they can live up to the hype.