In a groundbreaking development, SK Hynix has emerged as the top dog in annual profits, surpassing its long-standing rival, Samsung Electronics. This shift in the tech landscape is largely attributed to the transformative impact of AI, which has reshaped the dynamics of the industry.
The story begins with a simple flag fluttering in the wind outside SK Hynix's office in Seongnam, South Korea. But beneath this seemingly ordinary scene lies a tale of triumph and transformation. In 2025, SK Hynix achieved an unprecedented feat by outperforming Samsung in operating profits for the first time. This success can be traced back to SK Hynix's unwavering focus on high-bandwidth memory, a specialized chip integral to AI processors and servers.
The rivalry between these two South Korean giants came to a head this week as they released their earnings reports. SK Hynix, with its record-breaking operating profit of 47.2 trillion won for the full year, left Samsung's 43.6 trillion won in the dust. This achievement highlights SK Hynix's remarkable journey since its acquisition by SK Telecom in 2012, solidifying its position as a powerhouse in South Korea's tech industry.
While SK Hynix has honed its expertise in memory chips, Samsung has diversified its portfolio across multiple businesses, including consumer electronics and contract chip manufacturing. Despite Samsung's broad reach, its memory segment generated operating profits of approximately 24.9 trillion won in 2025, falling short of SK Hynix's laser-like focus on memory technology.
The key to SK Hynix's success lies in its dominance in high-bandwidth memory, or HBM, a specialized chip that powers AI processors and servers. MS Hwang, research director at Counterpoint Research, hailed SK Hynix as an "outstanding 'AI Winner' in Asia," emphasizing its leadership in the quality and supply of HBMs and other chips used in AI servers. This advantage has been instrumental during the current phase of the AI infrastructure boom.
Even as Samsung regained the top spot in memory revenue rankings in the fourth quarter of 2025, SK Hynix has maintained its market lead in both high-bandwidth memory and HBM. However, the competition is heating up, with Samsung and Micron making significant strides in HBM technology. Samsung, in particular, has expanded its HBM sales and is poised to begin delivering HBM4 products, the latest sixth-generation HBM technology, later this year.
Ray Wang, an analyst at SemiAnalysis, believes that Samsung's HBM4 offerings for Nvidia's new products will mark a significant turnaround, addressing last year's quality issues. Nonetheless, analysts predict that SK Hynix will retain its high market share in HBM4 and maintain its dominant position.
The race for HBM4 dominance is shaping up to be a thrilling contest between SK Hynix and Samsung, with Micron trailing behind. Wang anticipates that SK Hynix will continue to lead the pack in HBM4, while Samsung makes substantial progress and becomes more competitive in this cutting-edge technology.
As the AI revolution continues to reshape industries, the rivalry between SK Hynix and Samsung is set to intensify. The question remains: Will SK Hynix's current lead in HBM4 solidify its position as the ultimate AI winner, or will Samsung's advancements in HBM technology shift the balance of power? The future of this rivalry is sure to spark lively debates and discussions among tech enthusiasts and industry experts alike.
