YMTC Ships More Flash Than Kioxia. It Still Earns Less. The IPO Is Meant to Close That Gap.

Yangtze Memory Technologies (YMTC), the Chinese chipmaker that designs the flash storage inside phones, SSDs, and data centers, has overtaken Japan's Kioxia and US players Micron and SanDisk to become the world's third-largest NAND flash supplier by shipments. It is now turning to Shanghai's stock market to fund the harder climb: turning bits shipped into dollars earned.

Counterpoint Research pegged YMTC at 14% of global NAND flash memory shipments in the second quarter of 2026, putting the company behind only Samsung and SK Hynix and ahead of Kioxia, Micron, and SanDisk. (EE Times) The position is the first time a Chinese supplier has held a top-three ranking in NAND, the storage chips that hold data when a device is powered off.

The volume lead is real. The value lead is not. YMTC remained fifth in NAND revenue in the same quarter, behind Kioxia and Micron, which ship fewer bits but generate more revenue per bit. (EE Times) The gap reflects product mix. YMTC's output is concentrated in consumer applications like notebooks and smartphones, while enterprise SSDs (the high-capacity drives sold to data centers and corporate storage buyers) accounted for roughly 48% of global NAND bits shipped in the same quarter, per Counterpoint. Enterprise drives carry the margins that bit-share rankings miss, and YMTC has limited exposure to them.

YMTC's technical answer is Xtacking 4.0, the company's proprietary 3D NAND architecture, which bonds memory cell arrays on top of CMOS logic on separate wafers before stacking. The company has begun mass production of 267-layer 3D NAND chips on Xtacking 4.0, a layer count in the same range as the leading suppliers' production, and is developing NAND beyond 300 layers. (EE Times)

The capital lever is the Shanghai Stock Exchange's STAR Market, the Nasdaq-style board for Chinese technology issuers. YMTC has begun formal IPO preparations after completing the pre-IPO advisory process, with financial press reporting a planned raise of roughly $4.9 billion to $5 billion. (Bloomberg) (Yahoo Finance) The precedent is direct: CXMT, China's principal DRAM maker, raised nearly $10 billion on STAR last month in one of the largest Chinese tech listings on record. CXMT's debut showed the board will absorb a $10B semiconductor listing; YMTC's filing tests whether the appetite holds for a second one.

A ~$5B raise would not match CXMT's $10B debut; it would still rank among the largest semiconductor IPOs in Asia this year and would give YMTC a multi-year runway to qualify its parts with enterprise SSD buyers, who vet suppliers carefully before issuing volume purchase orders. (Yahoo Finance) The qualification window is where the IPO's capital has to work, funding the multi-year push to bid for data-center contracts, equip 300-plus-layer production lines, and absorb the boom-and-bust cycles that memory markets are known for.

YMTC has been on the US Commerce Department Entity List since 2022, which restricts its access to the most advanced lithographic tools, the EUV-class machines made by ASML that pattern the finest features on cutting-edge chips. (EE Times) NAND at 267 layers does not yet require EUV, so today's production is feasible. The constraint shapes how far YMTC can climb from here, especially as competitors keep moving up the layer-count ladder.

YMTC was founded in Wuhan in July 2016. The IPO prospectus, expected later this year, will disclose the share of revenue that enterprise SSDs contribute to current sales, the specific capacity targets for 300-plus-layer production, and the use of proceeds. Those three numbers will tell the market whether the climb from volume to value is real, or whether the bits keep moving while the dollars do not.