# China opens DRAM antitrust probe into Samsung, SK Hynix and Micron as CXMT rises
> Beijing investigates memory pricing, fines could reach $2.5B, while domestic champion CXMT files for a $4.2B IPO and nears third-largest by wafer capacity

**Meta:** type: story · date: 2026-06-10 · heads: 誰の金か, 静かな変化 · 10 takes · 3 lenses · 5 regions

## Summary

[China](/ja/entity/china) has opened an antitrust probe, reportedly starting in June, into [Samsung](/ja/entity/samsung),
[SK Hynix](/ja/entity/sk-hynix) and [Micron](/ja/entity/micron) over [memory](/ja/entity/hbm) pricing, with one Korean brokerage
estimating potential fines up to $2.5B across the three. The probe lands as the incumbents' year-long
production discipline drives DRAM and NAND prices sharply higher, and as Beijing's domestic champion
[CXMT](/ja/entity/china) (ChangXin) files for a ~¥29.5B ($4.2B) Shanghai STAR Market IPO at a valuation up to ~$42B.
CXMT reported ~$7.3B Q1 revenue (≈700% YoY), is heading toward ~350k wafer-starts/month, near
[Micron's](/ja/entity/micron) ~385k, and its DDR5 has crossed into global consumer modules. The three incumbents
still held >90% of Q4 DRAM shipments, but the floor is shifting.

## By the numbers

- Up to $2.5B, estimated potential combined antitrust fine (SK Securities analyst).
- >90%, incumbents' (Samsung/SK Hynix/Micron) share of Q4 2025 DRAM shipments.
- $4.2B, CXMT's planned STAR Market IPO; valuation up to ~$42B.
- ~$7.3B, CXMT Q1 2026 revenue (≈700% YoY); ~70% operating margin.
- ~350k wspm, CXMT projected end-2026 wafer capacity (vs Micron ~385k).

## Why it matters

The probe is leverage: a pricing investigation gives Beijing a counter to US chip controls and a shield
for CXMT's scale-up. If CXMT reaches third-by-capacity and lists with state-backed capital, the
three-player DRAM oligopoly that has underwritten the memory supercycle becomes a four-player market, 
with the new entrant inside China's tariff-and-subsidy perimeter.

## What to watch

- Any formal finding or fine against the three incumbents.
- CXMT IPO pricing, listing date and post-IPO capacity guidance.
- Whether CXMT's DDR5 share in global consumer modules keeps climbing.
- Knock-on to HBM: CXMT's commodity push frees incumbent capacity for HBM, or floods DRAM.

## Regional takes (batched by bias / lens)

### unlabelled
- **SemiAnalysis** (United States, en) — Deep capacity and economics breakdown of CXMT's challenge to the DRAM incumbents, wafer-start estimates, yield, margins and the path to becoming the third-largest supplier by capacity.
  Source: https://newsletter.semianalysis.com/p/chinas-cxmt-is-set-to-challenge-dram
- **Tom's Hardware (antitrust)** (United States, en) — 
  Source: https://www.tomshardware.com/news/china-pushes-dram-antitrust-probe,38090.html
- **TradingKey** (Global, en) — 
  Source: https://www.tradingkey.com/analysis/stocks/more/261937662-samsung-micron-sk-hynix-mu-china-dram-nand-hbm-tradingkey
- **AppleMagazine** (United States, en) — 
  Source: https://applemagazine.com/china-memory-firms-chip-restrictions/amp/
- **S&P Global Ratings** (United States, en) — 
  Source: https://www.spglobal.com/ratings/en/regulatory/article/asia-tech-hardware-the-credit-impact-of-rising-memory-prices-s101660049
- **The Economy** (South Korea, en) — 
  Source: https://economy.ac/news/2026/02/202602288291
- **Overclock3D** (United Kingdom, en) — 
  Source: https://overclock3d.net/news/memory/ddr5-saviour-cmxt-eyes-expansion-with-4-2-billion-ipo/
- **Yahoo Finance** (United States, en) — 
  Source: https://finance.yahoo.com/markets/stocks/articles/memory-chip-prices-break-dram-113021922.html

### hardware/industry desk
- **Tom's Hardware (IPO)** (United States, en) — Details CXMT's ~¥29.5B ($4.2B) Shanghai STAR Market IPO at a valuation up to ~$42B, laying out a path to profitability off a tight global memory market. Frames the listing as capital to scale DDR5/LPDDR5X capacity precisely when the incumbents' price discipline leaves room for a fourth player.
  > "CXMT aims to raise ~$4.2B to expand DDR5 capacity as global DRAM demand skyrockets, targeting a valuation up to $42B."
  Source: https://www.tomshardware.com/pc-components/dram/chinese-memory-maker-cxmt-prepares-to-file-for-ipo-aiming-to-raise-usd4-2-billion-usd-to-take-advantage-of-tight-memory-market-company-lays-out-path-to-profitability-as-dram-demand-skyrockets-worldwide

### Taiwanese supply-chain trade press
- **Digitimes** (Taiwan, zh) — Reports that consumer modules (e.g. Corsair Vengeance DDR5) are now shipping with CXMT DRAM rather than the three incumbents, the clearest sign CXMT has crossed from domestic supply into the global consumer chain, validating its yield and reshaping the supplier map.
  > "Corsair's reported CXMT DDR5 move puts Chinese DRAM on the global supply-chain map for the first time."
  Source: https://www.digitimes.com/news/a20260623PD209/corsair-ddr5-cxmt-dram-market.html

## Across the graph
- Related: [[china-rare-earth-controls]], [[h200-china-export-standoff]], [[micron-q3-2026-record-hbm]]
- Entities: China, Micron, Sk Hynix, Samsung, United States, South Korea

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