Seagate and Toshiba Bid for TDK's Core Business
2026-10-09
In 2026, Seagate Technology and Toshiba are competing to acquire TDK's hard disk drive (HDD) head business, with the deal expected to be worth billions of U.S. dollars. Toshiba was the first to approach TDK in the spring, and Seagate later joined the negotiations in the summer with a higher offer. Senior executives from the three companies recently met in Tokyo to discuss various options, including a joint venture, to secure the supply of HDD heads.
TDK's Unique Position and the Logic Behind the Bidding
TDK is currently the world's only independent HDD head supplier and supplies heads to all three major HDD manufacturers: Seagate, Western Digital, and Toshiba. Seagate and Western Digital both have in-house head production capacity and only buy additional heads from TDK when demand surges. Toshiba, by contrast, relies entirely on TDK for its head supply. In terms of shipped capacity, Seagate and Western Digital each account for about 45% of the global HDD market, while Toshiba holds only about 10%. If Seagate successfully acquires TDK's head business, Toshiba would have to buy a core component from a competitor, directly limiting its ability to expand production.TDK's technical support is particularly critical to Toshiba. TDK produces heads for the next-generation magnetic recording technologies of all three manufacturers: Seagate's heat-assisted magnetic recording (HAMR), Western Digital's energy-assisted magnetic recording (EAMR), and Toshiba's microwave-assisted magnetic recording (MAMR). Toshiba's next-generation 30TB-class drives are planned to use MAMR and later transition to HAMR. Because HAMR head development is difficult and time-consuming, TDK is a key support for both Toshiba's current products and its future roadmap. For TDK, the head business has relatively low margins and requires continuous capital investment. The company is shifting resources toward batteries, passive components, and sensors, and selling the business would free up funds for these new areas. Any acquisition, however, would face antitrust review by regulators in various countries.
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