A 10%+ surge in Seoul trading on Wednesday pushed the Korean memory company past $1 trillion, making it the third chipmaker after Nvidia and TSMC to cross the line.
SK Hynix’s market capitalization topped $1 trillion in Seoul trading on Wednesday morning, after a one-time rally of more than 10% that briefly tripped circuit breakers in South Korea’s benchmark Kospi index.
The Korean memory company becomes the third chip company ever to cross the trillion-dollar mark, after Nvidia and TSMC, and the first dedicated memory specialist to do so. The milestone comes at the end of an expansion that has been, by any standard benchmark, structurally ambiguous.
SK Hynix’s share price has risen nearly 900% over the past 24 months. Last month, the company stayed about 50 billion dollars below the trillion-dollar threshold; The closing gap shows how much the high-bandwidth memory (HBM) cycle has weighed on the company’s books. The full year’s capacity for 2026 HBM has been exhausted. The shortage is predicted to continue until 2027.
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The anchor of the structure is SK Hynix’s place in the Nvidia supply chain. UBS estimates that the company has orders for about 70% of HBM4 for Nvidia’s Vera Rubin platform, which Jensen Huang described in Taipei this week as. “Probably the biggest product launch in Taiwan’s history.”
Each Rubin unit consumes 288GB of HBM4 across eight stacks, and the system is limited to 22 TB/s of system bandwidth. SK Hynix’s unit economics are huge: HBM4 stacks sell for premiums over DRAM equipment, and Nvidia’s Rubin order book runs into hundreds of thousands of units.
The competitive image is also unusually friendly. Samsung, the world’s largest memory company, spent 2026 clearly behind the HBM4 qualification and is facing an industrial relations dispute that has reduced its memory.
Micron, the third leg of the global memory tripod, took a small part of the Rubin design win and a small share of the wider HBM market. Currently SK Hynix is the producer everyone has been waiting for.
A major market milestone also occurred at the same time as SK Hynix’s deep dive into a US dual listing that, in figures discussed, will raise around $14bn.
The trillion-dollar mark gives that list pricing power; it also gives Seoul’s capital market authorities a domestic flag narrative they won’t want to dilute. How the double list question is resolved is the next decision to look at.
It’s a tough question to be tough. Memory is a notoriously cyclical business, and the current cycle is being priced as if it will never end. SK Hynix’s capacity expansion, including the $13bn P&T7 HBM packaging plant, is limited by continued demand during the back half of the decade. If Nvidia’s demand for Rubin Ultra is anything to go by, the trillion mark is there. Otherwise, the historical pattern of memory stocks is that they return a lot of profit very quickly.
SK Hynix shares closed up 9.8% on Wednesday after intraday gains reached 15%.
