China's largest memory chipmaker ends its first trading day worth roughly $487 billion, overtaking every other mainland-listed company
ChangXin Memory Technologies opened on the Shanghai Stock Exchange's STAR Market on Monday and closed the session up 465.82%. By end of day, its market capitalization had reached 3.27 trillion yuan, approximately $487 billion, displacing ICBC as the largest company listed on a mainland Chinese exchange. That figure also puts CXMT above U.S. chipmaker Intel, a comparison that reflects how sharply investor appetite for domestic semiconductor capacity has shifted in China over the past several years.
The debut was mainland China's biggest IPO in recent years and the largest in Asian stock markets so far in 2026, according to The Elec.
What the valuation reflects
CXMT is based in Hefei and makes memory chips, a segment China has historically depended on imports to supply. The 466% single-day surge reflects investor expectations that domestic memory production will become indispensable, more than any verdict on CXMT's current revenues. The market has not yet been asked to separate near-term fundamentals from policy-driven optimism. The STAR Market, Shanghai's technology-focused board, was designed to attract high-growth, nationally important tech companies, and CXMT fits that profile.
The competitive context
A $487 billion market cap on day one places CXMT among the world's most valuable chipmakers by that single metric, though market cap and operational scale are different measures. Intel has decades of manufacturing infrastructure, established customer relationships across enterprise and consumer markets, and a global fab footprint. CXMT is still building toward a position that Samsung and SK Hynix have held for years in DRAM and NAND production. That gap between valuation and production capacity is the central tension the company will face as it moves from IPO momentum into quarterly reporting cycles.
The concrete test arrives when CXMT begins disclosing financial results as a public company, where STAR Market rules will require the revenue and margin transparency that pre-IPO CXMT was not obligated to provide.
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