CXMT surges 466% on Shanghai STAR Market debut, market cap hits $487B

Shanghai — ChangXin Memory Technologies (CXMT) closed its first trading day on Shanghai's STAR Market at 49 yuan on Monday, surging approximately 466% from its IPO offer price of 8.66 yuan. The rally gave China's only volume DRAM manufacturer a market capitalization of roughly 3.3 trillion yuan ($487 billion), making it the most valuable company on mainland Chinese markets, ahead of Industrial and Commercial Bank of China.

IPO Details and Fund Allocation

The company raised 57.92 billion yuan ($8.6 billion) in Asia's largest IPO of 2026. According to its prospectus, the bulk of named project spending is allocated to wafer lines and process upgrades for DRAM that CXMT already produces, with no funds earmarked for high-bandwidth memory (HBM).

The prospectus splits 29.5 billion yuan across three projects:

• 13 billion yuan — DRAM technology upgrades
• 9 billion yuan — Next-generation DRAM research
• 7.5 billion yuan — Memory wafer manufacturing line upgrades

The filing contains no dedicated HBM project and no disclosed funding commitment to near-term HBM expansion. CXMT has not broken down where the remaining approximately 28 billion yuan goes, beyond describing it as working capital.

Competitive Position and Yield Challenges

Conventional DRAM yields more than three times the bits per wafer that HBM does. According to SemiAnalysis, CXMT's 8-high HBM3 yield is estimated at around 25%, while its cost per bit on DDR5 runs more than 30% above Samsung, SK hynix, and Micron.

Capacity additions this year (per SemiAnalysis estimates):

• CXMT: ~85,000 wafer starts per month
• SK hynix: 60,000
• Micron: 30,000
• Samsung: 15,000

This puts CXMT on course for roughly 350,000 wafer starts per month by the end of 2026 — within 25,000 of Micron's total, according to Citrini Research's model — before a Shanghai fab two to three times the size of its Hefei headquarters reaches volume production in 2027.

Customer Demand and Revenue Shift

Output is reportedly already booked through the end of 2027. DigiTimes has cited supply chain sources indicating that Dell, HP, Lenovo, and Apple are ahead of smaller buyers in the queue.

Recent major agreements:

• A five-year server DRAM agreement worth more than $7 billion with ByteDance this month
• A $3 billion deal with Tencent in June

Server products grew from 8.4% of CXMT's revenue in 2024 to 26.5% last year.

Analyst Views Diverge

Nomura opened coverage with a buy rating and a 116 yuan target — 1,239% above the IPO price — assuming CXMT's share of global DRAM output climbs from about 10% now to 18% by the end of 2028.

Morningstar puts fair value at 14.90 yuan, under a third of Monday's close, citing the company's lack of access to EUV lithography as the constraint on further conventional DRAM scaling.

Nomura's downside case, built around potential equipment and materials embargoes, cuts 2027–2028 net profit by 30% to 33%.

Trading and Product Considerations

Only 6.73% of CXMT's enlarged share capital was tradable at listing, with the lock-up expiring on January 27, 2027. Buyers of the resulting memory modules are not getting a discount: retail DDR5 kits using CXMT dies track the pricing of the big three manufacturers. Early testing has shown that CXMT dies resist voltage scaling and overclock poorly compared to SK hynix parts.

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