SK Hynix Overtakes Samsung to Become South Korea’s Most Valuable Company

SK Hynix has overtaken Samsung Electronics to claim the title of South Korea's most valuable listed company, a remarkable turnaround for a chipmaker that faced near collapse two decades ago. The company's dramatic rise is fueled by its crucial role as a dominant supplier of high-bandwidth memory (HBM) chips, essential components for artificial intelligence systems used by tech giants like Nvidia, Google, and Microsoft.

The global AI boom has propelled SK Hynix's shares up by more than 340% this year, lifting its market capitalization above both Samsung Electronics and Micron. As of Monday, SK Hynix's market value stood at 2,082.5 trillion won ($1.35 trillion), narrowly surpassing Samsung Electronics' 2,081.3 trillion won. This shift underscores the AI revolution's impact on the semiconductor industry, transforming specialized memory chips into critical infrastructure for advanced AI models and applications like ChatGPT.

While Samsung Electronics manufactures a broader range of products including logic chips and consumer electronics, SK Hynix's strategic focus on memory chips, particularly HBM, has proven highly lucrative. Analysts credit SK Hynix's decision to continue investing in HBM technology, which involves vertically stacking chips for enhanced performance and lower power consumption, even during industry downturns, for its current market leadership. This vertical integration with AI processors sets HBM apart from conventional memory products.

This achievement represents one of the most significant corporate turnarounds in South Korea's history. In 2002, then-Hynix Semiconductor was on the brink of acquisition by Micron, burdened by debt from aggressive expansion. The deal ultimately failed, leaving the company under creditor control for nearly a decade. Its shares plummeted to as low as 135 won in 2003, making it a penny stock. The company navigated the traditional boom-and-bust cycles of the memory industry, reporting a substantial annual operating loss of 7.73 trillion won in 2023 due to a severe downturn in memory prices. However, a year later, the momentum of the AI boom and significant investments from major tech companies led to a record annual operating profit of 23.5 trillion won in 2024.

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The emergence of customized AI memory fundamentally changed the industry's economics and allowed SK Hynix to establish itself as the market leader.