South Korean memory chipmaker SK Hynix reached a $1 trillion market valuation on Friday, May 29, 2026, following a massive rally in its share price. The company joins an exclusive group of global technology firms, propelled by surging demand for semiconductors essential to artificial intelligence infrastructure and a global shortage of memory chips.
A Surge Driven by AI Memory Demand
The path to the $1 trillion milestone has been marked by extraordinary growth. According to reporting from Al Jazeera, SK Hynix’s share price has skyrocketed 240 percent since the start of the year, with an 80 percent increase occurring in May alone. By Friday, the company’s market capitalization reached 1.66 quadrillion won, or approximately $1.10 trillion.
This financial performance reflects a broader shift in the semiconductor industry. While investors once viewed memory chip manufacturers as cyclical businesses prone to boom-and-bust cycles, the rise of large language models and advanced reasoning systems has rewritten the narrative. As Yahoo Finance notes, this current cycle is defined by a structural supply-demand imbalance where demand for high-bandwidth memory (HBM) is growing faster than manufacturing capacity can be expanded.
The catalyst for the May rally was the May 22, 2026, regulatory filing with the Korea Exchange, where SK Hynix disclosed a revised supply agreement with a major U.S.-based hyperscaler. In the filing, CEO Kwak Noh-Jung confirmed that production of the company’s sixth-generation HBM, known as HBM4, has been moved forward to Q3 2026, three months ahead of the original internal schedule. This shift was confirmed during the company’s May 25 investor call, where CFO Kim Woo-hyun stated that the order book for HBM4 is “fully committed through the end of 2027,” providing rare long-term visibility that institutional investors cited as a primary driver for the stock’s re-rating.
The Competitive Landscape of the Trillion-Dollar Club
SK Hynix is now the second South Korean company to achieve this valuation, following Samsung Electronics. The milestone places the firm among a small tier of global entities. Currently, only 17 companies in history have reached the $1 trillion mark, with the majority based in the United States.
The exclusive list includes global giants that achieved the valuation over the last several years:
- PetroChina (2007)
- Apple (August 2018)
- Amazon (September 2018)
- Microsoft (April 2019)
- Alphabet (January 2020)
Of the 14 companies currently holding a valuation of at least $1 trillion, only four are based outside the United States: SK Hynix, Samsung Electronics, Taiwan’s TSMC, and Saudi Aramco. The rapid ascent of SK Hynix mirrors a wider rally in the KOSPI index, which has doubled in value during 2026.
Market analysts at Goldman Sachs, in a May 27 research note to clients, highlighted that SK Hynix’s valuation premium over its traditional DRAM-focused peers has reached an all-time high of 4.2x price-to-book ratio. Bruce Lee, a senior semiconductor analyst at Mirae Asset Securities, noted in a client briefing on May 28 that “SK Hynix has effectively decoupled from the standard commodity memory cycle, trading instead as an essential AI utility provider.” This sentiment was echoed by the Korea Financial Supervisory Service (FSS), which, in a routine market stability report issued on May 26, noted that the concentration of foreign capital in SK Hynix shares now accounts for 18 percent of total net inflows into the KOSPI this year.
Operational Growth and Future Capacity
The market confidence in SK Hynix is supported by record-shattering financial results. In the first three months of 2026, the company’s operating profit surged fivefold year-on-year, reaching 37.6 trillion won, or $24.9 billion. Revenue for the same period was 52.6 trillion won, or $34.8 billion, representing a threefold increase on a yearly basis.
Industry analysts point to high-bandwidth memory as the critical bottleneck in the current AI infrastructure buildout. Hyperscalers—including Meta, Microsoft, Amazon, and Alphabet—are collectively planning over $725 billion in capital expenditures for 2026. This influx of investment is creating a constant, insatiable demand for advanced memory chips.
This pressure on supply has given manufacturers significant pricing power. Recent disclosures indicate that entire production capacities for HBM are being sold out well in advance, allowing companies to maintain higher margins than they experienced in traditional DRAM cycles. For SK Hynix and its competitors, the challenge in the coming months will be scaling manufacturing to meet this demand without the supply overexpansion that historically collapsed prices in the memory sector.
The expansion plans are capital-intensive. On May 20, 2026, SK Hynix announced a $15 billion investment in the M17 and M18 fabrication plants located in Cheongju. According to the company’s official May 21 press release, these facilities are intended to exclusively produce HBM3E and HBM4 chips. The investment remains conditional, however, on the approval of subsidies under the South Korean government’s “Semiconductor Mega-Cluster” initiative, a framework formalized by the Ministry of Trade, Industry and Energy on January 15, 2026. Minister Ahn Duk-geun stated during a May 28 press conference that the government intends to expedite these approvals to ensure domestic supply chain security, citing the competitive pressure from TSMC’s own expansion in Japan and the U.S.
Despite the optimism, some stakeholders remain cautious. In a May 29 note, analysts at Morgan Stanley warned that the “visibility into 2028 remains murky” if hyperscalers begin to moderate their AI infrastructure spending. The firm pointed to a precedent in 2022, when memory manufacturers overestimated long-term server demand, leading to a 40 percent inventory correction. As of the market close on May 29, SK Hynix shares were trading at a forward P/E ratio of 18.5, a level that remains sensitive to any quarterly guidance changes regarding the capital expenditure plans of its largest clients, Microsoft and Meta.
