SK Hynix has risen to become the most valuable company in South Korea after overtaking Samsung Electronics, a shift that underscores how quickly the AI boom is redrawing the semiconductor map.
The change is striking because Samsung had held the top position since 2000. SK Hynix’s climb reflects surging demand for high-bandwidth memory, or HBM, a component increasingly central to AI development.
AI demand is changing market priorities
HBM has emerged as one of the biggest beneficiaries of the growing appetite for advanced memory used in AI systems. That demand has given SK Hynix a major advantage in the eyes of investors, lifting the company’s market value sharply.
The company is now one of the leading players in the HBM market, where it competes with Samsung and Micron of the United States. As the market has expanded, SK Hynix has seen its stock price rise far faster than many other technology names.
SK Hynix shares have gained more than 340% this year, pushing its market capitalization beyond Samsung Electronics and Micron. On the latest reported trading session, the stock rose another 5.6%, taking its market value to $1.35 trillion and placing it just above Samsung’s.
A dramatic reversal from two decades ago
The current market strength stands in sharp contrast to the company’s position two decades ago. In 2002, when it was still known as Hynix Semiconductor and had not yet been acquired by SK Group, its survival was in doubt because of heavy debt.
At one point, the company was nearly sold to Micron. That episode makes its current position especially notable, as the former near-target of a sale now stands ahead of one of the world’s biggest chip rivals.
The turnaround also highlights how fast the semiconductor industry can change when a new technology wave takes hold. In this case, AI has elevated advanced memory from a niche specialty into a strategic asset with outsized investor attention.
Samsung says the picture is not that simple
Samsung has argued that its total market value should also include preferred shares. According to the company, if those shares are included, its total market capitalization at the end of the same trading session would be about $1.47 trillion.
That view suggests the race for the top spot depends on how the calculation is made. Even so, SK Hynix’s move remains significant because it marks a rare change at the summit of South Korea’s corporate landscape.
Samsung has remained the country’s dominant listed company for more than two decades. The fact that SK Hynix could close the gap, even temporarily by one measure, shows how powerful the AI-driven HBM cycle has become.
Why investors are rewarding HBM leaders
Market enthusiasm is being driven not only by current sales but also by expectations about where demand is heading next. Companies that can supply memory for AI workloads are being assigned far higher value than before, especially when they hold a strong position in HBM.
SK Hynix is now benefiting directly from that shift. Its rapid share-price appreciation reflects confidence that advanced memory will remain a critical part of the AI buildout, while also showing how quickly market rankings can change when investor priorities move.
Samsung remains a giant in South Korea’s technology sector, but SK Hynix’s rise shows that size alone no longer guarantees the lead. In the current market, specialization in high-demand AI components can be enough to alter the balance at the very top.
For South Korea’s chip industry, the development signals a new phase in competition. A company once weakened by debt and nearly sold away is now setting the pace in one of the most important segments of the AI era.