SK Hynix has officially overtaken Samsung Electronics to claim the position of South Korea’s most valuable listed company, according to market data on Monday. The milestone reflects a remarkable turnaround for a firm that once faced financial collapse nearly two decades ago due to heavy debt burdens. The shift has been driven largely by SK Hynix’s dominance in high-bandwidth memory (HBM) chips, a critical component powering artificial intelligence systems. These advanced chips are widely used by global tech leaders such as Nvidia and Google, making SK Hynix one of the biggest winners of the ongoing AI boom. The surge in demand has fueled a sharp rise in its share price, which has climbed more than 340% this year, pushing its market value ahead of both Samsung and U.S. rival Micron.

At the latest trading levels, SK Hynix’s market capitalisation stood at around 2,082.5 trillion won ($1.35 trillion), narrowly edging past Samsung Electronics, which was valued at approximately 2,081.3 trillion won when excluding preferred shares. Samsung, however, noted that including all share classes would place its valuation higher. The development underscores how artificial intelligence is reshaping the global semiconductor industry. Once treated as standard commodity products, memory chips have now become strategic, high-value components at the heart of AI infrastructure, including systems behind tools like ChatGPT and other large-scale models.

Unlike Samsung, which operates across a wide range of businesses including smartphones, TVs, and logic chips, SK Hynix has concentrated its focus on memory semiconductors. This specialization has helped it secure a leading position in the HBM segment, where it now holds a dominant global share. Industry analysts believe SK Hynix’s early and sustained investment in HBM technology—especially during periods when the memory market was under pressure—has been a key factor behind its success. This strategic bet has paid off as demand from AI-focused companies continues to accelerate.

The company’s journey has been a dramatic one. In the early 2000s, then-Hynix Semiconductor struggled with severe debt and was even close to being acquired by Micron. It later spent years under creditor control before gradually recovering. Its stock once traded at extremely low levels, reflecting doubts about its future.

Over time, SK Hynix moved through the typical ups and downs of the global memory cycle, but the AI-driven surge in demand has fundamentally changed its trajectory. After reporting losses during the 2023 downturn in memory prices, the company rebounded strongly in 2024, posting record operating profits as global tech firms ramped up investments in artificial intelligence. Experts point out that SK Hynix’s success lies in its focus on HBM, a vertically stacked memory technology that delivers faster performance and better energy efficiency compared to conventional chips. Because these chips are closely integrated with AI processors, switching suppliers is difficult, giving SK Hynix stronger pricing power and competitive advantage.

By 2025, the company has secured a leading share of the global HBM market, significantly ahead of Samsung and Micron. This shift is also narrowing the production gap between SK Hynix and Samsung in broader DRAM manufacturing, with forecasts suggesting SK Hynix could continue closing the distance in the coming years.

Founded in the 1980s as part of Hyundai and later acquired by SK Group, the company has transformed into a core pillar of South Korea’s semiconductor industry. Its leadership has emphasized a long-term vision of moving beyond commodity memory products toward highly specialized, indispensable technologies. Market observers say SK Hynix’s potential future listing plans in the United States could further boost its global visibility and attract broader investor interest. The development marks one of the most significant shifts in South Korea’s corporate landscape in recent years, highlighting how rapidly the AI revolution is reshaping global technology leadership.