China's Biggest Memory Chip Stock Is Almost as Good as Micron

ChangXin Memory Technologies' IPO shook the stock market to its core.

It was almost exactly one month ago that CXMT debuted on the Shanghai stock exchange, raising $8.6 billion to fund production expansion and reaching a $487 billion market capitalization after its stock ran up 466% in a single day. Investors in Micron (NASDAQ: MU) stock, meanwhile, had a very different reaction to CXMT's arrival. Micron stock dropped 9% on CXMT's IPO day. (And fell another 10% the next day.)

And now you know why.

Image source: Getty Images.

Introducing CXMT

China's largest manufacturer of DRAM computer memory chips, CXMT, poses an indirect threat to Micron's DRAM business today -- and potentially a far more direct threat in the future. As CNBC has reported, beginning at the end of 2026, CXMT will produce specialized, stacked DRAM chips to sell as "high bandwidth memory" -- HBM, essential for artificial intelligence operations. HBM is a key growth market for Micron.

And soon, CXMT will be competing to own it.

How effective a competitor will CXMT be for Micron? As it so happens, the company gave investors a glimpse of the answer to that question because last week -- just a month after going public -- CXMT reported its earnings for the first half of 2026.

CXMT H1 earnings

CXMT grew its revenue by 874% year over year in H1 2026, as Reuters reports, reaching 150.3 billion yuan ($22.4 billion USD) and earning 77.6 billion yuan ($11.5 billion) in net profit on these sales. That's a 51.6% net profit margin for the company -- not quite as good as the 63% net profit margin that Micron earned in the same period, according to data from S&P Global Market Intelligence, but the gap is closing quickly.

As recently as last year, CXMT's net margin was negative.

Nor is CXMT's profit margin the only thing that's growing quickly. The company's sales growth rate of 874% outclasses Micron's 203% by a factor of four, implying that not only is CXMT getting more profitable, but it's also doing so while it expands and takes market share from Micron and other rivals.

Which, in turn, implies that CXMT's prices must be significantly lower than Micron's -- yet more profitable for CXMT despite the lower price points.

Prediction: What's next for CXMT

S&P puts CXMT's current market capitalization at $582.5 billion, up 20% over the past month, on top of its IPO day gains. According to The Wall Street Journal, the company -- virtually unknown before its IPO -- has rocketed to become "the world's fourth-largest manufacturer of DRAM memory."

WSJ further notes that CXMT has an 11% market share in DRAM globally, versus 25% for Micron (the world's third-largest DRAM manufacturer after Samsung at 39% and SK Hynix (NASDAQ: SKHY) at 26%). And WSJ estimates CXMT will grow its market share to 15% by 2030.

I personally think that estimate's too conservative.

Why? Consider that Micron itself grew its DRAM market share from 22% to 25% in just one year, from 2025 to today. If CXMT is already expanding sales as fast as it seems to be, and is charging low enough prices to explain the kind of sales growth the company is seeing, and is enjoying the financial and regulatory support of the Chinese Communist Party in its home market, then I predict CXMT will accelerate its market share growth.

One caveat: According to the Journal, CXMT trails Samsung, SK Hynix, and Micron "by two or three generations" in DRAM technology. It's going to take the company some time to play catch-up. Investors should anticipate that CXMT will first begin grabbing market share in low-end DRAM markets for mobile devices, for example, before challenging Micron in the HBM market for artificial intelligence systems.

But make no mistake: CXMT is coming for Micron's most valuable market.

And Micron's margins are at risk.

Rich Smith has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Micron Technology. The Motley Fool has a disclosure policy.