Kioxia Holdings, a Tokyo-based memory chip maker, briefly became one of Japan’s most valuable listed companies on June 3, with its market value surpassing 45 trillion yen (US$282 billion).

Investors have been betting that growing demand from AI data centers will drive earnings growth for storage-chip makers.

Eighteen months after its initial public offering, Kioxia’s stock rose as much as 7.2% before trading up 1.7% in the afternoon.

Toyota Motor rose 2.5%, leaving Kioxia below the automaker by market capitalization.

The jump extends a rapid rise since April 23, when Kioxia was 10th in Japan by market value at 19.3 trillion yen (US$121 billion).

The company also remains one of the largest memory suppliers, ranked third globally in NAND flash revenue in the third quarter of 2025.

🔗 Source: Bloomberg

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