World's second-largest memory chipmaker and current HBM market leader (roughly 53-60% share depending on source/quarter); its board approved the 54 trillion won investment and holds full control over the buildout timeline.
SK Group chairman credited with championing the accelerated fab expansion strategy that moved up the Yongin cluster completion target by twelve years.
SO
South Korean government / President Lee Jae Myung
Framed combined Samsung and SK Hynix commitments worth more than $576 billion as a national 'tripolar mega-project,' aligning SK Hynix's fab expansion with state industrial policy.
Competing memory maker holding roughly 35% HBM share; separately expanding capacity by about 50% in 2026 and building the P5 facility in Pyeongtaek, targeted for 2028, putting direct pressure on SK Hynix to keep pace.
Third major memory maker (~11% HBM share); exiting the consumer memory and storage market to focus entirely on AI and enterprise customers, intensifying competition for the same AI-grade capacity SK Hynix is building.
HY
Hyperscalers and AI accelerator makers
Demand-side driver whose voracious appetite for HBM/DRAM is forcing memory makers to reallocate cleanroom capacity toward AI-grade components, squeezing consumer supply in the process.