Shares of ChangXin Memory Technologies surged 466 percent in their Shanghai debut Monday, closing at 49 yuan after pricing at 8.66 yuan and giving the Hefei-based chipmaker a market value of about 3.3 trillion yuan, or $487 billion, and making CXMT the most valuable company listed in mainland China.
The debut on the tech-heavy STAR Market lifted one of Beijing's most closely watched semiconductor champions past Industrial and Commercial Bank of China, whose 2.6 trillion yuan valuation it eclipsed within hours of trading, and handed Chinese financial officials a rare piece of good news after a recent stock-market slump wiped out more than $1.5 trillion. CXMT raised 57.92 billion yuan, or $8.6 billion, in what CNBC called Asia's biggest initial public offering this year.
The company
CXMT, founded in 2016 by Chairman Zhu Yiming and headquartered in Hefei, in eastern China's Anhui Province, manufactures dynamic random-access memory chips used in artificial-intelligence data centers, mobile phones, personal computers and tablets. Based on fourth-quarter 2025 sales, the company held a 7.67 percent share of the global DRAM market last year, according to its IPO prospectus, a distant fourth behind Samsung Electronics, SK Hynix and Micron Technology, the three companies that together account for roughly 90 percent of global production.
The chipmaker swung to an operating profit of 35.43 billion yuan in the first quarter from a loss of 2.83 billion yuan a year earlier, its prospectus showed, as global computing demand and orders from major manufacturers accelerated. Apple has begun testing CXMT's DRAM for devices sold in China, according to reports earlier this month cited by CNBC. Semafor, citing Bloomberg, has described CXMT as Beijing's most credible bet to challenge foreign producers of memory chips.
Why the pop
Only 7 percent of CXMT's shares were available to trade on day one, a supply squeeze that analysts said amplified an already frenzied response to the listing.
"The reason for the extraordinary bounce this morning is that only 7% of the shares are available for trading," Anna Macdonald, investment strategy director at Hargreaves Lansdown, told the BBC's Today programme.
Theodore Shou, chief executive of Yiyi Capital, said on CNBC's "Squawk Box Asia" that day-one moves of that magnitude were routine among smaller listings but rare for a company of CXMT's size, and that the narrow free float and built-up market sentiment were the day's main drivers.
Chinese investors' appetite for a homegrown memory maker has been sharpened by Beijing's semiconductor self-sufficiency push and by a global chip cycle that has more than doubled memory prices in recent months, forcing some big-tech firms to raise prices on tablets and video-game consoles. Micron reported a 15-fold increase in quarterly profits last month. Ellie Wong, an analyst at TrendForce, told Reuters the memory shortage was expected to last through 2027.
"Amid persistent supply shortages, many customers are seeking to diversify their memory supplier base, which should significantly benefit CXMT and create more business opportunities," Wong said.
On the Street
The Monday listing followed a run of memory-chip dealmaking abroad. SK Hynix raised $26.5 billion earlier this month in the largest-ever U.S. listing by a foreign firm, and on Friday Nvidia said it had secured up to $500 billion in AI-memory supply from the South Korean maker while Samsung Electronics signed a separate $200 billion memory-and-foundry pact with Broadcom.
"I have no doubt the company is going to grow to be a global leader. It's maybe just a question of time that it can be not only a challenger, it can be a global champion in this particular sector," Shou said.
Morningstar wrote in a Friday note that while CXMT's technology still lags global memory leaders, domestic Chinese internet giants spearheading AI development are likely to drive robust adoption of its chips as Beijing presses for semiconductor self-sufficiency, which the research firm called increasingly an issue of national security for China.
The caveat
Shou also warned that "we are nearing a short-term peak in terms of sentiment around the memory cycle," saying investors had already begun selling into the offering, particularly in mainland China. Today's margins and net profitability, he said, are "not sustainable and have to normalize over a cycle." Semafor reported that some analysts view the debut surges as overblown, even as others see the furor as justified given forecasts that the memory crunch could last years. Chinese state-affiliated commentary was absent from today's center-tier reporting, and Beijing's securities regulator had not publicly addressed the narrow first-day float structure by press time.
CXMT said it plans to spend most of the IPO proceeds on expanding memory-chip production and on research and development.