In May 2026, a remarkable shift unfolded in global capital markets. Within just 30 days, five leading companies and three major stock exchanges witnessed a once-unthinkable milestone: the world’s three dominant memory-chip manufacturers each crossed the $1 trillion market capitalisation threshold.
The sequence was strikingly orderly. On May 6, Samsung Electronics became the first memory company to surpass the trillion-dollar mark in Seoul. On May 26, Micron Technology surged 19.3% in a single session, lifting its valuation above $1.01 trillion. A day later, SK Hynix jumped more than 11%, pushing its market capitalisation to $1.06 trillion. For the first time in the history of the semiconductor industry, the three giants that dominate the global memory market joined the trillion-dollar club within a single month.
Behind the market euphoria lies a deeper transformation. The industry’s underlying logic is changing. Memory makers now stand at a critical inflection point between two eras: the traditional boom-and-bust cycle driven by supply and demand remains embedded in the industry, but the structural growth unleashed by artificial intelligence is reshaping pricing, investment decisions and capacity planning.
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