CXMT debuts on Shanghai STAR at $85B in record chip IPO

A Chinese memory-chip maker most readers outside hardware supply chains have not heard of is about to become, on the numbers, the largest listing a Chinese semiconductor company has ever done on a mainland exchange. ChangXin Memory Technologies, known as CXMT, priced its Shanghai STAR Market debut at 8.66 yuan per share, giving it an implied valuation of about 579 billion yuan, or roughly US$85 billion, and raising up to $9.8 billion if a 15% overallotment is exercised. Bloomberg previewed the July 27 trading debut, and the South China Morning Post notes it beats the record set by SMIC's 53.23 billion yuan Shanghai raise in 2020.

Why the size matters is less the trade itself and more what it says about Beijing's semiconductor playbook. CXMT is the world's fourth-largest DRAM maker with about 7.7% share in 2025 per its own prospectus, well behind Samsung at 38.6%, SK Hynix at 28.8%, and Micron at 22.4%. But it is China's domestic answer to those three, and the public market has just handed it enough capital to fund another leg of capacity and R&D on mainstream DDR5 and LPDDR5X. Retail demand reportedly ran at 212 times oversubscribed, though institutional bidding came in softer than usual.

The reaction outside China told the second half of the story. Micron and SK Hynix shares sold off on fears that CXMT-scale capacity coming online will glut commodity DRAM pricing, exactly the segment those two rely on to fund the far more profitable HBM stack for AI accelerators. CXMT itself is not chasing HBM at the leading edge, and its reported roadmap is mainstream memory where scale and domestic policy support matter more than the advanced equipment it cannot yet buy.

The honest caveat is that a heavily retail-oversubscribed A-share IPO priced during a memory upcycle is not the cleanest read on enterprise value, and lockup expiries plus that softer institutional bidding will matter more than any debut-day pop. What the reporting does not settle is how much of the raise actually funds an HBM catch-up versus more of the same DDR5 capacity, or where US equipment-export ceilings leave CXMT's node roadmap over the next couple of years.

For anyone building on memory-sensitive AI infrastructure, the takeaway is straightforward: a fourth credible DRAM supplier is now sitting on public-market capital, and the pricing floor for commodity memory has a new gravitational pull.