By Marcus Webb | May 26, 2026
Micron Technology became the latest semiconductor company to cross the $1 trillion market capitalization threshold on Tuesday, as AI-driven demand for memory chips propelled the stock to an all-time high. Micron shares surged 5.8%, pushing its market cap past the trillion-dollar mark for the first time.
The milestone came on a day when both the S&P 500 and Nasdaq Composite closed at record highs. The S&P 500 rose 0.9% to 6,812. The Nasdaq gained 1.3% to 22,045. The Dow added 312 points, or 0.7%.
Micron joins Nvidia, TSMC, and Broadcom in the trillion-dollar semiconductor club — a group that didn’t exist three years ago. The company’s high-bandwidth memory (HBM) chips have become a critical component in AI data centers, with demand outstripping supply for five consecutive quarters.
Micron’s HBM3e revenue tripled year-over-year to $4.2 billion in its most recent fiscal quarter. The company guided for continued growth, citing contracts with all three major hyperscale cloud providers.
The broader market rally was broad-based. Nine of eleven S&P sectors closed higher. The only laggards were energy, which pulled back as oil steadied below $90, and utilities.
