August 12, 2026 / SemiMedia / — An investment vehicle linked to SK hynix has overtaken Toshiba as the largest shareholder of Japanese NAND flash manufacturer Kioxia.

BCPE Pangea Cayman2 held 14.19% of Kioxia’s voting rights as of August 3. Toshiba’s stake fell from 14.48% to 14.12%, moving the former parent company into second place.

SK hynix joined the Bain Capital-led consortium that invested in Kioxia in 2018 and retains an economic interest connected to BCPE Pangea Cayman2. It does not currently control the voting rights attached to the vehicle’s Kioxia shares, leaving Kioxia’s existing management structure unchanged.

The relationship is attracting attention because SK hynix and Kioxia are two of the world’s major NAND flash manufacturers. They compete in enterprise SSDs, data-center storage, mobile devices and consumer electronics, while both are expanding products aimed at AI infrastructure.

Kioxia has identified the relationship as a potential risk in its annual securities report. The company said SK hynix’s position as a competitor could create interests that differ from those of Kioxia and its other shareholders.

Kioxia continues to operate independently, and the companies have not announced any new manufacturing or technology partnership. Still, the shareholder change creates a closer capital link between two direct competitors in the NAND market.

The timing is notable as NAND suppliers benefit from stronger enterprise SSD demand while maintaining tight control over capacity investment. Any closer relationship between major producers could influence expectations for future cooperation or industry consolidation.

The next question is whether SK hynix will make further changes to its Kioxia investment or explore cooperation in enterprise SSDs, AI data-center storage or production planning. Under the existing agreement, SK hynix cannot hold more than 15% of Kioxia’s voting rights before 2028 without Kioxia’s approval.