CXMT Shares Surge as Much as 535% in Record Shanghai Debut

CXMT Corp., mainland China's largest maker of DRAM memory chips, closed its first trading day in Shanghai as the most valuable company listed on any Chinese exchange, after an IPO that raised roughly $8.6 billion.

CXMT's 8.66-Yuan Pricing Produces China's Largest Onshore Chip Listing

CXMT, formally ChangXin Memory Technologies, priced its Shanghai STAR Market offering at 8.66 yuan a share, selling about 6.69 billion shares to raise 57.92 billion yuan, or roughly $8.6 billion, according to the company's listing documents. Proceeds could rise to 66.61 billion yuan, close to $9.8 billion, if underwriters exercise the deal's over-allotment option in full. At the offer price, CXMT was valued at about 579 billion yuan, or $85.5 billion, before that option — Asia's largest IPO so far in 2026, and the biggest semiconductor listing ever on a mainland Chinese exchange, surpassing SMIC's $7.5 billion Shanghai offering in 2020. Only about 6.73% of CXMT's enlarged share capital was freely tradable at listing, since most shares remain locked up, a small float that tends to magnify price swings.

Shares Surge Past 500% Intraday, Though Outlets Disagree on the Final Number

Trading opened Monday with no daily price limit for CXMT's first five sessions, a rule that applies to new listings and left room for an outsized move. Bloomberg reported the stock climbed as much as 535% intraday, hitting a session high of 55.03 yuan and a valuation near 3.7 trillion yuan, or about $547 billion — enough to make CXMT the most valuable company on any mainland Chinese exchange. Reuters, citing the same session, put the mid-session high slightly lower, at 54.65 yuan and roughly $539 billion. By the close, CNBC and the Associated Press reported a smaller gain of around 466% to 472%, with shares settling near 49 yuan and a market capitalization close to 3.3 trillion yuan — still enough to overtake Industrial and Commercial Bank of China's 2.6 trillion yuan and claim the top spot among China-listed firms. The spread between these figures reflects when each outlet measured the stock during a volatile session, not a factual disagreement about the debut itself. The listing also landed amid a broader pullback across AI-linked chip stocks, after Shanghai's STAR 50 index had already softened in the prior sessions.

Washington's HBM Export Controls Frame CXMT as Beijing's AI Memory Bet

CXMT ranks as the world's fourth-largest DRAM producer, behind Samsung, SK Hynix, and Micron, and held about 7.67% of the global DRAM market in 2025 based on fourth-quarter sales figures disclosed in its prospectus. Its listing arrives as U.S. restrictions continue to bar China from importing the most advanced high-bandwidth memory chips used in AI accelerators — a gap CXMT is trying to close with its own HBM development program alongside its core DRAM business. Kyle Chan, a Brookings Institution fellow who studies China's technology policy, has described the company as central to Beijing's AI push precisely because of those export limits. Some U.S. lawmakers have separately urged the Trump administration to restrict American firms from buying CXMT's chips, citing national and economic security concerns, though Beijing has pushed back on similar designations in the past. Morningstar analyst Jing Jie Yu cautioned in a note ahead of the listing that CXMT is well positioned to ride rising domestic AI demand, but that its technology gap with the established DRAM leaders could still cap how much of the AI-memory market it can realistically capture. The dynamic echoes the industry structure at the center of the price-fixing allegations against the industry's established DRAM makers, where a small number of global suppliers have long set the terms of memory pricing.

A Sevenfold Revenue Jump Sets Up the Case for CXMT's Capacity Push

The financial swing underlying the listing is steep. CXMT's operating profit reached 35.43 billion yuan in the first quarter of 2026, reversing a 2.83 billion yuan loss a year earlier, while quarterly revenue rose more than 700% year-over-year to about 50.8 billion yuan, or roughly $7.5 billion. In its prospectus, the company guided to first-half 2026 revenue of 110 billion to 120 billion yuan — more than seven times the year-earlier period — and net profit of 66 billion to 75 billion yuan, also reversing a loss. CXMT has said it plans to direct IPO proceeds mainly toward mass-producing memory wafers, and Bloomberg has reported the stock could become eligible for Stock Connect as early as the exchange's third-quarter review, which would open it to Hong Kong-based investors for the first time. The listing also lands weeks after reports that Apple began testing CXMT's DRAM for devices sold in China, a detail that matters against the backdrop of the memory-driven price increases Apple recently made to its Mac and iPad lineup. Not every investor is convinced the numbers justify the price: hedge fund manager Yuan Yuwei of Trinity Synergy Investments said the stock "smells of speculation," a caution that sits alongside Morningstar's more measured view that CXMT's growth still depends on closing a real technology gap, not just on capital raised.