Western Digital and Seagate Shares Drop on Reports of Toshiba HDD Supply Expansion

Key Facts

Shares of Western Digital and Seagate fell following reports that Toshiba aims to increase its supply of hard disk drives. Seeking Alpha reported that the Japanese competitor's move to boost production capacity is intended to meet AI data center demand, raising concerns over market share for the industry incumbents.

WDC closed at $462.56 on October 1, 2026, with the stock reaching a day high of $463.55 and a low of $440.05 during that session. The potential supply increase from Toshiba is perceived as a competitive threat that could lead to pricing pressure and reduced margins for existing market leaders.