NVIDIA

Nvidia's rise to a roughly $5.4 trillion valuation — the first company ever to cross the $5 trillion mark — is the AI boom made literal: its chips are the thing every major AI lab actually trains on. The H100 and newer Blackwell GPUs power OpenAI, Google DeepMind, Meta AI, and nearly every serious large-model effort on the planet, and data center revenue alone crossed $100 billion on an annualized basis in late 2025 -- a business that barely existed four years earlier. No other company's fortunes are this tightly wound around a single technology wave, for better or worse.