Kwak Noh-jung

Kwak Noh-jung serves as President and CEO of SK Hynix, the world's second-largest memory semiconductor manufacturer (after Samsung Electronics) and arguably the most important company in the AI hardware supply chain that most people have never heard of. SK Hynix produces DRAM (dynamic random-access memory), NAND flash memory, and — most critically — dominates the market for High Bandwidth Memory (HBM). HBM is the specialized high-performance memory that is physically stacked and integrated with AI accelerator chips (principally Nvidia's H100, H200, and B100/B200 GPUs). Every AI GPU requires HBM to function — it provides the massive memory bandwidth needed for AI training and inference workloads. SK Hynix was first to market with HBM3E (the latest generation) and commands an estimated 50%+ market share in HBM, giving it a crucial technology and manufacturing lead over competitors Micron and Samsung. The memory semiconductor industry is notoriously cyclical, with boom-bust pricing cycles driven by supply-demand imbalances. However, HBM has created a structural premium segment where demand consistently outpaces supply due to the explosive growth in AI computing infrastructure. SK Hynix's traditional DRAM and NAND businesses remain cyclical, but HBM provides a high-margin growth anchor. Key stock drivers include HBM demand from Nvidia and other AI chip makers, HBM pricing and market share, DRAM pricing cycle, NAND market conditions, capital expenditure plans, and the overall trajectory of AI infrastructure investment.