A major Chinese IPO in flash memory manufacturing has disrupted the global data storage market, challenging established East Asian tech giants. While the stock surge reflects strong investor confidence in local tech ecosystems, it raises fears among competitors of a global oversupply that could drive down commodity prices.

Chinese memory chip manufacturer ChangXin Memory Technologies (CXMT) (688825.SS) surged 465.8% on its Shanghai stock market debut, raising anxieties for South Korean semiconductor giants over a looming supply glut, market data showed on July 27, as Korea JoongAng Daily reported.

CXMT closed its first trading session at CNY49 ($7.25) per share on July 27. The Hefei-based semiconductor firm issued 6.688bn new shares at CNY8.66 each, raising a total of CNY57.92bn ($8.57bn) in its initial public offering (IPO). The transaction stands as the largest public offering in Asian equity markets this year. It is also the biggest ever by a Chinese semiconductor company, beating the previous record of CNY46.29bn set by SMIC in July 2020. Mainland Chinese exchanges have not seen a larger float since the Agricultural Bank of China raised CNY68.8bn in July 2010.

The blockbuster listing signals that Chinese memory manufacturers are mounting a full-scale entry into the global IT supply chain, backed by immense domestic capital. While the cash injection will accelerate CXMT’s capacity expansion, it threatens to trigger a legacy hardware price war that could severely dent the profit margins of South Korean market leaders during the next macroeconomic downturn.

The capital influx will fund mass production lines for computing wafers and upgrade dynamic random-access memory (DRAM) technology, the company said on July 27. CXMT currently commands a DRAM wafer capacity of 300,000 units per month. This production volume remains significantly below the manufacturing capacity of its South Korean rivals. Samsung Electronics (005930.KS) leads global production with 700,000 units per month, followed by SK hynix (000660.KS) at 550,000 units per month.

However, CXMT has successfully achieved commercial mass production of fifth-generation double data rate (DDR5) memory and its low-power variants, LPDDR5 and LPDDR5X. Profitability has climbed rapidly on the back of recent global memory price increases. Because DDR5 architectures serve as the primary memory standard across modern PCs, enterprise servers, and smartphones, CXMT’s graduation from older DDR4 formats places it in direct commodity competition with Samsung Electronics and SK hynix. These legacy segments still generate the bulk of corporate earnings for the South Korean giants.

Global demand for memory chips will also expand alongside the race to build more efficient artificial intelligence models, Peter Lee, managing director and head of Korea Research at Citigroup Global Markets Korea Securities, told Korea JoongAng Daily.

“Even as Chinese AI chips gain a larger share of the market, memory will still be required, which is expected to bode well for Korean memory makers,” Lee said. He added that the shift toward lower-cost service delivery will drive explosive growth for both high-performance and lower-specification, cost-effective memory components.

The ongoing AI boom will remain the primary growth driver for the Chinese chipmaker. Nomura Holdings projected that CXMT’s memory chip output will expand at 40% to 45% annually through 2030. This growth trajectory is expected to push CXMT’s global DRAM market share to 18% by end-2028.

“We expect CXMT’s market share gain to accelerate considering that the global supply of memory is unlikely to ease in the coming years,” analyst Donnie Teng wrote on July 27, issuing a buy rating and a target price of CNY116. Teng estimated that strong demand for agentic AI will drive a more than sevenfold increase in global memory usage by 2030.

Market shares and technological bottlenecks

Readings from global analytics firms show the legacy memory market continues to be dominated by the two South Korean incumbents. Samsung Electronics held the largest global market share at 38% in the first quarter of 2026, followed by SK hynix at 29%, according to data released by Counterpoint Research. CXMT captured 8% of the global market during the same period, though this marks a significant rise from the 3% range it occupied in the first quarter of 2025.

Closing the remaining market share gap will prove difficult for CXMT without extreme ultraviolet lithography (EUV) systems, Morningstar noted in an analyst report. US export controls currently block the Chinese firm from acquiring these advanced machines, which are required to etch smaller, highly precise semiconductor circuits.

“Multiples remain strictly under pure-play memory leaders in our coverage given CXMT’s lagging technological capabilities, translating into lower DRAM prices versus its peers,” Morningstar reports. The financial services firm set a conservative valuation of CNY14.90 per share for CXMT. “We do not expect this pricing gap – and the corresponding valuation discount – to narrow unless CXMT can overcome the EUV constraint while maintaining economic profitability.”

The massive scale of the Shanghai debut has also raised concerns among some regional analysts that the microchip market is becoming overheated, noting that historic mega-IPOs by sector competitors have frequently marked cyclical peaks.

“This AI-driven boom is likely to mark the point at which Chinese memory makers make a full-scale entry into the IT market, a shift that could become a serious burden for Korean players when the next down cycle arrives,” said Lee Min-hee, an analyst at BNK Securities.

Further market saturation looms as other domestic players line up to go public. NAND flash manufacturer Yangtze Memory Technologies and Kunlunxin, the semiconductor subsidiary of search giant Baidu, are preparing for initial public offerings. Market rumours also indicate that generative AI startups DeepSeek and Moonshot AI could move toward public listings before end-2026.

Domestic defensive measures in South Korea

Korea JoongAng Daily also reports that to protect their market dominance against rising Chinese supply, South Korean chipmakers have aggressively pivoted toward premium high-bandwidth memory (HBM), leveraging state-backed investment clusters. The South Korean semiconductor device industry reached a base market valuation of $33.86bn in 2025, with integrated circuits controlling 85.72% of the local semiconductor market share. To maintain this lead, the state is funding a $471bn public-private semiconductor megacluster program to scale total domestic wafer capacity to 7.70mn units per month by 2030. This structural shift was highlighted in March 2025 when advanced HBM variants captured 36% of the global DRAM marketplace, commanding selling prices three to four times higher than standard legacy storage units.