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SK Hynix stock crossed a $1 trillion market capitalization for the first time on Wednesday, closing 9.3% higher on the Korea Exchange as demand for high-bandwidth memory chips used in AI data centers continued to tighten supply across the industry.
At its intraday peak, the stock climbed 14.9% before pulling back, with the chipmaker's total market value hitting a record 1,680 trillion won — equivalent to roughly $1.12 trillion — according to Reuters. Samsung Electronics had first cleared the $1 trillion threshold on May 6, and Micron $MU +19.29% Technology followed just one day earlier, on Tuesday.
SK Hynix, Samsung, and Micron now form the three dominant suppliers of high-bandwidth memory, sitting at the center of the global AI infrastructure buildout. Counterpoint Research data cited by Bloomberg show that as of last year's fourth quarter, SK Hynix commanded 57% of global HBM revenue, leaving Samsung and Micron with 22% and 21% shares, respectively. April earnings results showed quarterly profit multiplying fivefold, and the company projected that demand for HBM chips would outpace available supply over the coming three years.
Year to date, the three chipmakers have all posted extraordinary gains, with Micron leading at roughly 245%, SK Hynix close behind at about 215%, and Samsung adding approximately 149%.
