Shares of Changxin Technology Group, the memory chipmaker better known as CXMT, rose about 470% on their first day of trading on Shanghai's tech-heavy STAR Market, according to CNBC. The surge handed the Hefei-based company a market value of roughly $487 billion — enough to make it the most valuable company listed in mainland China, overtaking the state-owned banking giant ICBC.
The listing itself was already unusually large. CNBC reports CXMT priced its IPO at 8.66 yuan per share and raised 57.92 billion yuan, or about $8.6 billion, described in coverage of the debut as Asia's biggest initial public offering of the year and China's largest chip IPO in years. The BBC, which also reported the 470% first-day move, tied the enthusiasm to the AI boom and the demand it is creating for chips.
CXMT makes DRAM, the working memory that sits alongside processors in phones, PCs, servers and AI systems. It is China's largest DRAM producer. EE Times framed the offering as arriving in the middle of what it called a once-in-four-decades memory shortage — a supply crunch that has made memory one of the tightest and most lucrative corners of the chip industry.
The debut also lands against a political backdrop. Coverage of the listing noted the offering underscores China's AI-driven chip ambitions even as US restrictions on technology exports tighten.
A few caveats are worth holding onto. A 470% first-day pop reflects how a stock was priced and how investors behaved on one day, not a settled verdict on the business, and the reported market value moved with the intraday swing.
Why it matters: a domestic memory maker vaulting to the top of China's stock market is a concrete signal of how much capital the country is willing to put behind building its own chip supply chain — and of how expensive AI-era memory has become.