SK Hynix surpasses Samsung to become South Korea's most valuable company as AI-driven demand boosts its memory chip valuationExecutive summary: SK Hynix's market capitalization exceeded Samsung's, making it South Korea's most valuable company. The shift signals changing investor sentiment toward AI-driven memory demand and highlights Samsung's vulnerability in the fast‑growing AI chip segment. SK Hynix, Samsung, South Korean investors, and AI chipmakers relying on high‑bandwidth memory. Samsung may increase R&D spending on AI memory, while SK Hynix could pursue additional capacity expansion or strategic partnerships to sustain its lead.The AI boom has propelled SK Hynix's market capitalization above Samsung's, marking a shift in the leadership of South Korea's tech sector. The memory chip maker's valuation reached a record high on June 22, 2026, driven by strong demand for high-bandwidth memory used in AI processors. While Samsung remains a dominant player in smartphones and displays, its relative lag in AI memory has allowed SK Hynix to take the top spot. Analysts warn that the lead may be temporary if Samsung accelerates its AI memory roadmap.Connected developmentsSamsung, one of the world’s hottest stocks, is hit by insider-trading probeOpen the full case file on Beyond →
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