The biggest winner in the stock market this year isn’t Nvidia (NVDA) or one of the Magnificent Seven stocks. And I’ll bet it won’t be SpaceX, Anthropic, or OpenAI, although those upcoming IPOs will get a lot of attention this year.
Instead, the biggest winner so far this year is SanDisk (SNDK), an AI infrastructure company on an outstanding two-year run. SNDK stock jumped nearly 560% in 2025 after the company completed its spinoff from Western Digital (WDC) in February. And so far this year, it's up another 650%.