⚠ Third Place in a Six-Player MarketHigh threat

Kioxia Holdings (285A) — threat to the moat

Fourteen percent buys purchasing leverage with equipment makers and no ability to set a price or hold one.

The oligopoly argument that makes DRAM investable does not apply here, and Kioxia's own numbers show why.

NAND revenue share, top three, Q1 2026 (%)Samsung29%SK hynix18%Kioxia14%Counterpoint Research, NAND revenue share, Q1 2026
Third place is half of first: enough scale to buy tools, not enough to set a price.

NAND revenue in the first quarter of 2026 split Samsung 29%, SK hynix 18%, Kioxia 14%, Micron 13%, Sandisk 13% and YMTC 13%1. No participant can move the market alone, which sounds reassuring and is not: it means no participant can restrain it either. Six producers cutting price to fill six sets of fixed costs is how the year to March 2024 happened, when Kioxia's cost of sales exceeded its revenue2.

Scale at 14% buys real things — purchasing power with equipment makers, the ability to fund a process roadmap, a seat at every large customer. It does not buy the ability to set a price or to hold one.

The one structural improvement available is consolidation, and the industry has tried. The Kioxia–Western Digital merger collapsed in October 2023 on a shareholder veto3; the shareholder who blocked it has since sold out.

The number to watch is not Kioxia's share but the participant count. Six going to five would change this business more than anything Kioxia can do to itself.

References
  1. Third-party estimateNAND revenue in Q1 2026 split Samsung 29%, SK hynix 18%, Kioxia 14%, Micron 13%, Sandisk 13% and YMTC 13%.
    Counterpoint Research — global NAND memory market share. The NAND market reached a record US$46 billion in the first quarter of 2026, growing about 90% sequentially and roughly 3.5 times against the first quarter of 2025. Share by revenue: Samsung 29%, SK hynix 18%, Kioxia 14%, Micron 13%, Sandisk 13% and YMTC 13% — YMTC having risen from about 8% a year earlier. — Q1 2026 · publ. 2026 · source ↗
  2. ReportedIn the year to March 2024 Kioxia's cost of sales exceeded its revenue.
    Kioxia Holdings Corporation, consolidated results for the year to 31 March 2024 (reported in the Annual Securities Report for the following year) — revenue ¥1,076,584M against cost of sales of ¥1,205,927M, a gross loss of ¥129,343M, an operating loss of ¥252,698M and a loss for the year of ¥243,728M; the year to 31 March 2023 recorded revenue of ¥1,282,101M, an operating loss of ¥99,015M and a loss for the year of ¥138,141M. — years to 31 March 2023 and 2024 · publ. 2025-06 · source ↗
  3. ReportedThe Kioxia–Western Digital merger collapsed in October 2023 on SK hynix's objection.
    TechCrunch — 'Memory chip maker SK Hynix, a shareholder of Kioxia, opposes a merger with Western Digital', 26 October 2023. After more than two years of talks, Western Digital notified Kioxia that the proposed combination of its flash business with Kioxia would not proceed, citing the failure to obtain approval from SK hynix, a significant investor in Kioxia through the Bain Capital-led consortium, which had invested more than US$2.6 billion and objected that the transaction would undervalue its stake. — October 2023 · publ. 2023-10-26 · source ↗
Sources
Generated September 23, 2026