SK Hynix nears $1T as HBM sells out globally
Key insights
- SK Hynix's HBM and DRAM capacity is fully committed, meaning AI hyperscalers cannot source additional supply regardless of willingness to pay.
- The company recorded 72% operating margins on $35.6 billion quarterly revenue, up 198% year-over-year, among the highest in semiconductor history.
- A SK Hynix trillion-dollar crossing would make South Korea the first non-US country to host two simultaneous trillion-dollar public companies.
Why this matters
Memory was the last piece of the AI stack still priced like a commodity -- SK Hynix's margin profile signals that window has closed, and anyone building AI infrastructure must now model HBM as a structurally constrained input, not a spot-purchasable component. For AI founders and infrastructure teams, sold-out capacity through the foreseeable future means hardware roadmaps and training cluster expansions are gated by allocation relationships, not budget. And for technical leaders benchmarking competitive positioning, the 198% year-over-year revenue growth at these margins confirms that the economic value of the AI buildout is concentrating at the physical layer even faster than at the model or application layer.
Summary
SK Hynix has surged to a $948 billion market cap after shares climbed more than 200% in 2026, putting South Korea's memory giant within striking distance of a historic trillion-dollar valuation.
The driver is straightforward: AI hyperscalers cannot buy enough. SK Hynix's DRAM, NAND, and high-bandwidth memory capacity is effectively sold out, with major cloud providers unable to procure additional supply at any price. That scarcity is printing money at the margin level -- the company posted 72% operating margins on $35.6 billion in quarterly revenue, a figure that is up 198% year-over-year.
Essentially: (SK Hynix, Samsung) have become the physical chokepoint for AI infrastructure buildout.
- HBM supply is fully committed to AI customers, leaving no spot-market inventory for latecomers.
- $35.6 billion in quarterly revenue at 72% operating margin represents one of the highest-margin hardware businesses ever recorded.
- If SK Hynix crosses $1 trillion, South Korea becomes the first non-US nation to host two trillion-dollar companies simultaneously, after Samsung cleared the threshold earlier in May.
The memory sector, long treated as a commodity cyclical, has effectively repriced itself as critical AI infrastructure with the margin profile to match.
Potential risks and opportunities
Risks
- If Samsung accelerates its HBM yield improvement in H2 2026, SK Hynix's pricing premium could compress sharply within two quarters, hitting a stock priced for sustained scarcity.
- Hyperscalers (Microsoft, Google, Amazon) facing locked-out supply may accelerate internal memory R&D or exclusive co-development deals with Micron, reducing SK Hynix's long-term allocation leverage.
- South Korea's concentration of two near-trillion-dollar companies in semiconductor-adjacent hardware creates a single-country systemic risk: any geopolitical disruption, export control escalation, or natural disaster affecting Korean fabs would simultaneously impact global AI infrastructure supply.
Opportunities
- Micron, as the only US-headquartered HBM producer, gains significant policy and procurement leverage with US hyperscalers and government buyers seeking supply-chain diversification away from Korean manufacturers.
- AI infrastructure investment funds and analysts can reprice the entire memory sector as structural AI infrastructure rather than commodity cyclical, unlocking a new valuation framework and LP interest in semiconductor-focused vehicles.
- Advanced packaging firms (ASE Group, Amkor) and HBM substrate suppliers sit directly in SK Hynix's critical path and are likely to see accelerated long-term supply agreements as Hynix works to lock in its own upstream capacity.
What we don't know yet
- Whether SK Hynix has disclosed HBM allocation commitments beyond 2026, and which hyperscalers hold the largest forward contracts.
- Whether competing HBM suppliers (Micron, Samsung's HBM division) have a realistic path to closing the yield and capacity gap before 2027 demand cycles.
- The degree to which SK Hynix's 72% operating margin reflects structural pricing power versus a temporary supply-demand dislocation that corrects once Samsung or Micron scales HBM output.
Originally reported by Reuters
Read the original article →Original headline: AI Boom Puts SK Hynix on Cusp of $1 Trillion Market Value — Shares Up 200% in 2026 on Sold-Out HBM Output and 72% Operating Margins