SK Hynix Shatters Records with $1.3 Trillion Market Cap as HBM4E Samples Enter Customer Testing

SK Hynix becomes second South Korean company to surpass 2,000 trillion won market cap, driven by AI memory demand, new HBM4E samples, and a 308% YTD surge.

SK Hynix has crossed a historic threshold, becoming only the second company in South Korea to surpass a market capitalization of 2,000 trillion won — equivalent to roughly $1.3 trillion. The milestone arrived alongside a fresh 52-week high of 2,891,000 won for the stock on Friday, extending a year-to-date surge of 308% that has reshaped the nation's equity landscape.

The memory chip giant’s rally is pulling the entire KOSPI index higher. South Korea’s benchmark broke through 9,300 points for the first time on the same day, with SK Hynix and Samsung Electronics now accounting for a combined 52% of the index’s total market capitalization. The concentration underscores the immense weight of semiconductor stocks in the local market.

At the heart of the recent momentum lies a structural bottleneck in artificial intelligence infrastructure. Management expects the supply crunch to persist for at least three years, and contract prices for DRAM and NAND memory are climbing by 50% to more than 70%. Analysts now forecast an operating profit of between 60 trillion and 70 trillion won for the current quarter, a leap that dwarfs the already strong previous quarter.

Next-Generation Chips Enter the Ring

The company has begun shipping first samples of its 12?layer HBM4E memory to major customers, a move that bolsters its competitive position in the high-stakes race for AI accelerator chips. The new device achieves a data processing speed of 16 gigabits per second while improving energy efficiency by more than 20% over previous generations. SK Hynix employs an advanced MR?MUF packaging technique to stack the layers, yielding 48 gigabytes of capacity per module and reducing thermal resistance by 17%.

The product launch puts SK Hynix in a direct battle with Samsung Electronics, which has been delivering its own 12?layer HBM4E samples to global clients since early June. Both Korean chipmakers are vying for dominance in the data?center and AI?accelerator markets, where every performance gain can translate into multimillion?dollar contracts.

Execution on Display at HPE Discover

Away from the HBM spotlight, SK Hynix showcased a broader infrastructure portfolio this week at HPE Discover in Las Vegas. The company presented certified server products including data?center SSDs and DDR5 memory modules, reinforcing its role as a full?stack provider for AI?driven data centers.

The stock’s torrid advance has pushed technical indicators deep into overbought territory. The relative strength index currently sits near 73, and the 30?day annualized volatility has reached almost 96%, reflecting the aggressive repricing of the equity as investors bet on sustained AI demand.

Capacity Expansion Accelerates

To meet the anticipated explosion in orders, SK Hynix is rushing forward its expansion timeline. The first clean room in the new Yongin semiconductor cluster will now open in February 2027 — three months ahead of the original schedule. The initial fab at the site represents an investment of roughly 31 trillion won and is designed to serve as a global production hub for next?generation AI memory.

While the company has not disclosed specific customer names or a firm date for mass production of the HBM4E, a smooth transition to volume manufacturing would unlock lucrative long?term deals. The validation phase now under way is critical: SK Hynix must prove its new stacking and packaging technology can deliver at scale. If it succeeds, the record?breaking run may have further to go.