CXMT Surges 466% on Shanghai Debut, Becomes China’s Most Valuable Listed Company

ChangXin Memory Technologies (CXMT), China’s leading DRAM chipmaker, saw its shares surge 466% in their Shanghai debut on Monday, vaulting the company past Industrial and Commercial Bank of China to become the most valuable listed company on a mainland Chinese exchange.

The stock closed at 49 yuan, up from an IPO price of 8.66 yuan, giving CXMT a market capitalization of about 3.65 trillion yuan ($539 billion), according to multiple reports. The rally gave the company a valuation roughly half that of Micron Technology, despite its far smaller share of the global DRAM market.

CXMT raised at least $8.6 billion (57.92 billion yuan) in the offering, making it the second-largest mainland IPO after Agricultural Bank of China’s $22.1 billion listing in 2010. The company listed on the Shanghai Stock Exchange’s STAR Market, the Nasdaq-style board for technology firms.

The blockbuster debut underscores strong investor appetite for China’s homegrown chip champion, which sits at the center of Beijing’s push for technological self-sufficiency amid US-led export controls on advanced semiconductor equipment. The company’s success is also fueled by the artificial intelligence boom, which has driven a global memory-chip upcycle and boosted demand for DRAM chips used in AI servers, smartphones, and personal computers.

**Revenue Surge**

CXMT is the world’s fourth-largest DRAM maker, with a market share of about 7.7% in 2025, according to its IPO prospectus. Its first-quarter revenue jumped 719% from a year earlier to 50.8 billion yuan ($7.5 billion). In the first half of 2026, revenue is expected to hit 110 billion to 120 billion yuan, nearly doubling its full-year 2025 tally of 61.8 billion yuan.

The company’s growth has accelerated during a global memory-chip upcycle that began last year, driven by AI-related demand, which has boosted prices and spending on advanced memory products.

**State Backing and Key Figures**

CXMT’s shareholder base reflects China’s state-backed semiconductor financing system. According to its prospectus, state-owned shareholders held 36.29% before the IPO. These include Hefei and Anhui local-government-related investors, as well as China’s flagship state-backed semiconductor investment fund, known as the “Big Fund.”

A key figure behind CXMT is Zhu Yiming, founder of GigaDevice Semiconductor, a Chinese memory chip design firm. Company filings describe him as central to the creation and development of CXMT, and he later became its chairman.

**Competitive Landscape and Challenges**

Despite its meteoric rise, CXMT remains far behind industry leaders. According to Counterpoint Research, Samsung Electronics held 36% of the global DRAM market in 2025, SK Hynix 29%, and Micron about 24%, while CXMT accounted for roughly 6% of shipments. In the first quarter of 2026, CXMT’s share rose to approximately 9%. By 2028, Counterpoint forecasts CXMT’s market share will reach about 11%, but the firm estimates the company will need at least 15% to be competitive in the long term.

“Trade restrictions on tools are remaining as the key challenge for CXMT,” said MS Hwang, a research director at Counterpoint specializing in memory semiconductors.

US restrictions have barred China from importing high-bandwidth memory (HBM) chips, a high-performance type of DRAM critical for AI accelerators. CXMT is seen as China’s best shot at developing its own cutting-edge HBM chips to power domestic AI models, according to Kyle Chan, a fellow at the Brookings Institution.

“CXMT plays a critical role in China’s AI push, particularly in the face of US export controls,” Chan said.

Some US lawmakers have recently called for the Trump administration to block American companies from buying CXMT’s memory chips over national and economic security concerns. The Pentagon has designated CXMT as one of many Chinese companies with links to the Chinese military, a designation Beijing has rejected in most cases.

**Retail Frenzy**

The retail portion of CXMT’s offering was more than 210 times oversubscribed, according to the Heisenberg Report, with around 9.5 million individual investor accounts applying for allotments. China’s online IPO system does not require investors to provide cash when submitting applications; instead, they receive lottery entries based on the value of their existing Shanghai-listed shareholdings. The allotment rate was 0.47%, far higher than some recent listings.

New listings on the STAR Board enjoy no limits on upside moves for the first five trading days, amplifying the first-day surge. Turnover on Monday reached 141 billion yuan, a record for any onshore-listed stock, according to the same report.

CXMT’s debut surpassed SMIC’s 2020 offering as the largest-ever mainland semiconductor IPO, and it is the largest Asian IPO of 2026. The company plans to double output and achieve full vertical supply-chain integration, insiders told Bloomberg, as reported by the Heisenberg Report.

The IPO followed a $26.5 billion listing by South Korea’s SK Hynix on the Nasdaq earlier this month.