CXMT (formerly ChangXin Memory Technologies), China's largest memory chipmaker, experienced an extraordinary trading debut on the Shanghai Stock Exchange's STAR market. Its shares surged by as much as 472% and maintained a gain of approximately 462% by early afternoon. This remarkable increase propelled CXMT to become the most valuable company listed on a mainland Chinese exchange, boasting a market capitalization of about 3.3 trillion yuan (more than $487 billion). The company raised at least $8.6 billion with its initial public offering, priced at 8.66 yuan ($1.3) per share, making it mainland China's second-largest IPO after the $22.1 billion offering by Agricultural Bank of China in 2010.
The astronomical rally has, however, sparked concerns about potential speculation, with some financial analysts calling the share price "too expensive." Yuan Yuwei, a hedge fund manager at Trinity Synergy Investments, expressed doubts about the sustainability of the optimism, while Wu Zhou, a fund manager at Shenzhen Deyuan Investment, sold his shares bought at IPO as soon as trading began. The small initial free float of only 6.73% of CXMT's extended share capital, due to most shares being subject to lock-up, may have amplified share price fluctuations and attracted high trading volumes, with 122 billion yuan in CXMT shares traded during the morning session in Shanghai.
Despite potential speculative elements, CXMT's debut highlights its growing importance in the global semiconductor industry. The company, founded in 2016, is one of the world's largest makers of DRAM chips. In the first three months of this year, CXMT accounted for approximately 9% of global DRAM shipments. Counterpoint Research forecasts its market share to reach about 11% by 2028, though it estimates at least a 15% global market share is needed for long-term competitiveness. In 2025, CXMT was the fourth-largest DRAM maker by shipments, holding roughly 8% of the global market, trailing Samsung (36%), SK Hynix (29%), and Micron (24%). The company anticipates a more than seven-fold increase in revenue for the first half of the year, expecting 110-120 billion yuan, and a net profit of 66-75 billion yuan, reversing a loss from the previous year, driven by jumping demand from the rapid rise of AI. However, Morningstar analyst Jing Jie noted that while CXMT is well-positioned for domestic AI demand, its technological gap with global leaders could limit its market share in AI memory chips.
The IPO proceeds, potentially reaching 66.61 billion yuan if an over-allotment option is fully exercised, make it the largest Chinese semiconductor IPO ever, surpassing SMIC's $7.5 billion share sale in Shanghai in 2020. The company's rapid growth and market valuation have placed it on par with significant international players, with its market value now nearly half that of its American rival, Micron. Facing trade restrictions on tools as a key challenge, CXMT is positioned to benefit from the ongoing tightness in the memory chip market, with price increases expected to continue until late 2027. Counterpoint's research director MS Hwang highlighted trade restrictions as a key challenge, and some U.S. lawmakers have previously called for blocking American companies from buying CXMT's chips over national security concerns.
