SK Hynix Joins $1 Trillion Market Cap Club as AI Memory Boom Intensifies

The Milestone

SK Hynix jumped as much as 11% on Wednesday (May 27, 2026), lifting the South Korean chipmaker's market capitalization above $1 trillion. The company's market value reached a record 1,680 trillion won ($1.12 trillion), pushing the KOSPI index to an all-time high. This historic milestone comes just one day after U.S. chipmaker Micron crossed the same threshold and weeks after Samsung Electronics first achieved the $1 trillion valuation.

AI-Driven Supply Crunch

Explosive demand for AI has led to a global memory shortage that chipmakers like Micron are struggling to fill, allowing Micron and peers SK Hynix and Samsung to hike prices. Surging demand for high-end memory chips used in AI systems like NVIDIA's has tightened global supply and sharply increased prices, with memory chip prices doubling in the first quarter and expected to rise as much as 63% this quarter as AI data center demand strains supplies.

Stock Performance and Industry Shift

SK Hynix shares have skyrocketed about 250% since the start of 2026. SK Hynix rose 9.3% in South Korea on Wednesday, taking its 12-month gain to more than 1,000%. The semiconductor sector, once dominated by boom-and-bust cycles driven by supply-demand imbalances, is undergoing a fundamental transformation, with AI demand tightening supply and encouraging more long-term supply agreements spanning three to five years.

Market Implications

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. This makes South Korea the first nation outside the U.S. to have multiple companies achieve this market value, with only three Asian companies, including Taiwan Semiconductor Manufacturing Co., having reached the $1 trillion milestone.