Chinese chipmaker CXMT surges 466% on IPO, becomes nation's most valuable firm

CXMT, China's leading producer of dynamic random-access memory (DRAM) chips, soared 466% on its first day of trading on the Shanghai Stock Exchange's STAR Market, closing at 49 yuan ($7.25) per share, up from the initial public offering price of 8.66 yuan ($1.30). The surge gave the company a market capitalization of about $539 billion, according to reports, making it the most valuable firm listed on a mainland Chinese exchange.

The company raised at least $8.6 billion (57.92 billion yuan) in what was mainland China's second-largest IPO ever, behind only Agricultural Bank of China's $22.1 billion offering in 2010. It was also the largest Asian IPO of 2026, according to reports.

The blockbuster debut reflects strong investor appetite for a homegrown chip champion at the heart of Beijing's push for technological self-sufficiency, particularly as the U.S. and its allies tighten export controls on advanced semiconductor equipment. The rally came amid a global memory-chip upcycle fueled by artificial intelligence demand, which has boosted prices and spending on advanced memory products.

CXMT's first-quarter revenue jumped 719% from a year earlier to 50.8 billion yuan ($7.51 billion), according to its IPO prospectus. In the first half of this year, 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 is the world's fourth-largest DRAM maker, with a market share of about 7.7% in 2025, according to its prospectus. By shipments, it held roughly 6% of the global market in 2025, behind Samsung Electronics (36%), SK Hynix (29%) and Micron Technology (about 24%). In the first three months of this year, CXMT accounted for approximately 9% of global shipments, according to Counterpoint Research.

Despite its market value surge, CXMT remains far behind industry leaders in advanced memory technologies, particularly high-bandwidth memory (HBM) chips crucial for AI accelerators. Samsung and SK Hynix dominate the HBM market, and the U.S. has barred China from importing powerful HBM chips.

"CXMT plays a critical role in China's AI push, particularly in the face of U.S. export controls," said Kyle Chan, a fellow at the Brookings Institution and an expert in China's technology policies, as reported by multiple outlets. He added that CXMT is seen as China's best shot at developing its own cutting-edge HBM chips to power Chinese AI models.

The company faces significant headwinds. "Trade restrictions on tools are remaining as the key challenge for CXMT," said MS Hwang, a research director at Counterpoint who specializes in memory semiconductors. Counterpoint estimated CXMT would need at least a 15% global market share to be competitive in the long term. Some U.S. lawmakers have also called for President Donald Trump's administration to block American companies from buying CXMT's memory chips over national and economic security concerns, according to reports.

CXMT's shareholder base reflects China's state-backed semiconductor financing system. Its prospectus says state-owned shareholders held 36.29% before the IPO, including Hefei and Anhui local-government-related investors and China's flagship state-backed semiconductor investment known as the "Big Fund." A key figure behind the company 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.

The IPO's retail tranche was heavily oversubscribed, reflecting intense demand from individual investors. According to the Heisenberg Report, the retail portion of CXMT's offering was more than 210 times oversubscribed. China's online IPO system does not require investors to provide cash when submitting applications; instead, applicants receive lottery entries based on the value of their existing Shanghai-listed shareholdings, and they pay only if they win allocations, the report explained. The allotment rate was 0.47%.

Some analysts warned of excessive exuberance. "My biggest concern is that [CXMT] will go off the script the first day, driving up its size to extreme levels, signaling a top for Chinese tech stocks," a Shenzhen-based institutional investor was quoted as saying by the Heisenberg Report.

Despite the valuation, CXMT's market capitalization is still smaller than those of South Korean and American memory chipmakers. Its $539 billion valuation put it at just over half of Micron's valuation, according to reports. CXMT's public share offering followed a $26.5 billion IPO by South Korea's SK Hynix on the Nasdaq earlier this month.