China's CXMT Surges 470% on Debut, Becomes Shanghai's Most Valuable Company

The memory chip maker's first day on the Shanghai Stock Exchange turned into a spectacle of AI-era capital, erasing nearly every comparable debut from recent memory.

CXMT shares surged 470% on the first day of trading, July 26, 2026.
The gain made CXMT the most valuable company listed on the Shanghai Stock Exchange.
CXMT is China's leading domestic manufacturer of DRAM memory chips.
The debut arrives as U.S.-China competition over advanced semiconductor supply chains intensifies.
No single institutional seller or government-linked stabilization fund was reported as capping the move.

China's top memory chip maker, CXMT, opened trading on the Shanghai Stock Exchange on Saturday, July 26, 2026, and closed the session up 470% from its IPO price — a single-day move that left the company sitting atop the exchange by market capitalization.

The listing had been anticipated as a domestic answer to South Korean and American DRAM dominance. It landed as something closer to a national sentiment trade.

CXMT, formally Changxin Memory Technologies, manufactures DRAM chips at its facility in Hefei, Anhui province. Its product line sits at the center of Chinese government efforts to build a self-sufficient advanced semiconductor supply chain, a project that has absorbed tens of billions of dollars in state-linked funding since 2015.

The 470% figure places the debut in unusual company. By comparison, the STAR Market — Shanghai's tech-heavy board, where CXMT listed — has a 20% daily price-move limit for most securities after the first five sessions. First-day moves are uncapped.

The New York Times, reporting July 26, noted the surge came amid accelerating AI infrastructure demand globally, with memory chips among the components most directly implicated in large-model training costs.

CXMT's chips have not, as of the close of trading, been certified for sale to the hyperscale data center customers currently driving that demand in the United States.