Chinese memory chipmaker ChangXin Memory Technologies (CXMT) surged nearly 466% on its first day of trading, becoming the most valuable company listed on mainland China’s A-share market.
CXMT closed at $7.24 per share on Shanghai’s STAR Market, compared with its IPO price of around $1.28 per share. The rally pushed its market value to approximately $484 billion.
The debut followed Asia’s largest IPO of 2026 and highlighted growing investor interest in China’s semiconductor industry as demand for memory chips rises alongside the AI boom.
CXMT raised at least $8.5 billion through its IPO, making it one of the largest semiconductor listings in China.
The total could rise to around $9.9 billion if an additional share option is fully exercised.
Shares climbed to around $8.17 during the first trading session before closing at $7.24.
Approximately $21 billion worth of CXMT shares changed hands during the session, making it the first A-share stock to record more than $20 billion in daily turnover.
CXMT produces DRAM, the type of memory commonly used in smartphones, PCs, servers and other electronic devices.
The company has rapidly grown into the world’s fourth-largest DRAM manufacturer behind Samsung, SK Hynix and Micron.
CXMT holds roughly 8% to 9% of the global DRAM market, making it an increasingly significant competitor in the memory industry.
The company was founded in Hefei in 2016 and has become an important part of China’s effort to reduce its dependence on foreign semiconductor technology.
CXMT has benefited from rising memory prices and strong demand linked to artificial intelligence infrastructure.
The company reported around $7.5 billion in revenue during the first quarter of 2026, representing a sharp increase compared with the previous year.
CXMT expects revenue for the first half of 2026 to reach approximately $16.3 billion to $17.8 billion as the global memory market remains tight.
Strong AI demand and the wider memory shortage are encouraging customers to look for additional suppliers, potentially creating more opportunities for CXMT.
CXMT’s rapid expansion comes as China pushes for greater semiconductor self-sufficiency amid technology restrictions imposed by the United States.
US export controls limit the company’s access to some advanced chipmaking technologies, which could make it harder to close the gap with larger global competitors.
CXMT is also on the US Defense Department’s list of companies believed to support China’s military.
Despite those challenges, CXMT’s stock market debut shows that investors are placing a high value on the company’s role in the global memory market and China’s wider semiconductor industry.
The sharp rally has also raised questions about valuation, particularly because only a relatively small portion of CXMT’s shares was freely tradable at launch, which can amplify price movements when demand is high.
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