Micron Technology briefly crossed the $1 trillion market capitalization threshold on May 26, after an 18% single-day surge triggered by a UBS upgrade. That makes it the third memory chip maker to hit the milestone this month, joining Samsung Electronics and SK Hynix in a club that, until very recently, was reserved for the likes of Apple, Microsoft, and Nvidia.
The numbers behind the memory gold rush
Samsung was first through the door, crossing $1 trillion earlier in May. SK Hynix was close behind, with its market cap estimated between $942B and $966B around mid-May. Then Micron leapfrogged into the club after UBS raised its price target to $1,625, reframing the company not as a cyclical memory stock but as a structural beneficiary of the AI buildout.
SK Hynix has been the most dramatic mover of the three. Its shares have soared more than 200% year-to-date through mid-May, following a 274% increase in 2025. To put that in perspective: if you’d bought $10,000 worth of SK Hynix at the start of 2025, you’d be sitting on roughly $56,000 today.
Together, Samsung, SK Hynix, and Micron control approximately 90% of the global memory chip market.
