Chinese memory maker ChangXin Memory Technologies (CXMT) debuts on Shanghai exchange at $489B+ valuation with 466% IPO surge; allocates 29.5 billion yuan to DRAM production, breaking 30-year Samsung/SK Hynix/Micron oligopoly.

ChangXin Memory Technologies closed its first day on Shanghai's STAR Market at 49 yuan on Monday, up roughly 466% from an 8.66 yuan offer price, giving China's only volume DRAM maker a market capitalization of about 3.3 trillion yuan ($487 billion) and the top spot on the mainland market ahead of Industrial and Commercial Bank of China. The company raised 57.92 billion yuan ($8.6 billion) in Asia's largest IPO of 2026, with its prospectus assigning the bulk of named project spending to wafer lines and process upgrades for DRAM production, with nothing earmarked for high-bandwidth memory.

The prospectus allocates 29.5 billion yuan across three projects: 13 billion yuan for DRAM technology upgrades, 9 billion yuan for next-generation DRAM research, and 7.5 billion yuan for memory wafer manufacturing line upgrades. The filing contains no dedicated HBM project and no disclosed funding commitment for near-term HBM expansion. CXMT has not detailed where the remaining roughly 28 billion yuan will go beyond describing it as working capital.

Conventional DRAM yields more than three times the bits per wafer that HBM does. SemiAnalysis models CXMT's 8-high HBM3 yield at around 25%, while its cost per bit on DDR5 runs more than 30% above Samsung, SK hynix, and Micron. CXMT will add approximately 85,000 wafer starts per month of DRAM capacity this year, compared to 60,000 at SK hynix, 30,000 at Micron, and 15,000 at Samsung, per SemiAnalysis estimates. This puts the company on track for roughly 350,000 wafer starts per month by the end of 2026, within 25,000 of Micron's total by Citrini Research's model, before a Shanghai fab two to three times the size of its Hefei headquarters reaches volume production in 2027.

Output is already booked through the end of 2027, with Dell, HP, Lenovo, and Apple ahead of smaller buyers in the queue, according to supply chain sources cited by DigiTimes. CXMT signed a five-year server DRAM agreement worth more than $7 billion with ByteDance this month and a $3 billion deal with Tencent in June. Server products grew from 8.4% of revenue in 2024 to 26.5% in 2025.

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 approximately 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 a constraint on further conventional DRAM scaling. Nomura's downside case, built around potential equipment and materials embargoes, projects a 30% to 33% cut to net profit in 2027 and 2028.

Only 6.73% of CXMT's enlarged share capital was tradable at listing, with the lock-up expiring on January 27, 2027. Retail DDR5 kits using CXMT dies track big three pricing, and early testing has shown the dies resist voltage scaling and overclock poorly compared to SK hynix parts.