Kioxia Loses 7.7% in Chip-Wide Flight to Safety While Toshiba Lightens Its Load

Kioxia shares closed Friday at EUR 71.50, down 7.7%, as a broad retreat across the global semiconductor complex dragged the Japanese memory maker lower alongside its peers. The decline came against a punishing session for technology stocks worldwide, with US chip names setting a weak tone and South Korea's benchmark KOSPI index tumbling more than 5% at the open, according to Reuters.

The sell-off was compounded by reports of technological advances at Chinese rival ChangXin Memory Technologies (CXMT), which stoked fears of intensifying competition in the memory segment. Investors, already growing more cautious about spending on artificial intelligence, took the news as a cue to reduce exposure. Market watchers also pointed to the unwinding of margin positions in Kioxia as a factor that amplified the downward swings.

Despite the latest stumble, the stock remains up 276% since the start of the year. Even so, the correction of recent weeks lays bare the mounting nervousness among market participants, who are subjecting valuations across the chip sector to fresh scrutiny. The shares now trade 27% below their 50-day moving average.

A Stake Sale and a Ratings Lift

Behind the price action, the company's shareholder register shifted. A regulatory filing showed that major holder Toshiba cut its stake in Kioxia to 11.80% from 12.84%, effective October 1.

On the fundamental side, Kioxia has been making its own headlines. S&P Global Ratings raised the company's long-term issuer rating to BBB on Tuesday, assigning a positive outlook. The agency cited robust demand for flash memory and SSDs, including those used in AI applications, as well as the company's net cash position.

Product development has moved at a similar clip. On October 9, Kioxia unveiled its first E1.L SSDs in the LD4 series, built on eighth-generation BiCS FLASH with QLC technology. The line spans capacities of 15.36 terabytes and 30.72 terabytes, with an architecture designed to support up to 122.88 terabytes. Four days later, on October 13, the company announced models with direct liquid cooling for its CM9 enterprise SSD range, offering up to 30.72 terabytes for read-intensive workloads and 25.6 terabytes for mixed-use duties, with samples already in the hands of selected customers.

Investors will get a clearer read on the operating picture at the end of the month. Kioxia Holdings has scheduled the release of its second-quarter results for October 30.