Toshiba expands HDD capacity and both Seagate and Western Digital face TDK heads bidding competition

Toshiba announced a $380 million investment to double its hard‑disk‑drive output by fiscal 2027, targeting a rise in market share from just over 10% to about 30%. A Bloomberg report said Seagate and Toshiba are vying to buy TDK’s magnetic‑head unit, a deal estimated at several billion dollars. The news pushed Seagate shares down 8.9% to $808.08 and Western Digital shares down 6.4% to $413.16, with broader market reactions of roughly 9% and 7% declines respectively.

The potential acquisition could reshape the HDD supply chain and give the winner pricing power over a critical component, which analysts say may affect margins for all three manufacturers. Moody’s upgraded Seagate’s credit rating, citing expected revenue growth of more than 30% in the next 12‑18 months, indicating that the company’s fundamentals remain strong despite the short‑term sell‑off.

  • 1Toshiba is investing $380 million to nearly double its HDD production capacity by fiscal 2027.
  • 2Toshiba aims to increase its HDD market share from just over 10% toward 30% over time.
  • 3Seagate shares fell 8.9% to $808.08 on the day of the report.
  • 4Western Digital shares fell 6.4% to $413.16 on the same day.
  • 5Both stocks dropped about 9% (Seagate) and 7% (Western Digital) after the Bloomberg story.
  • 6The TDK magnetic‑head transaction is reported to be worth several billion dollars.
  • Exact purchase price for TDK’s magnetic‑head business is described only as "several billion dollars".
  • Outcome of the bidding process and any antitrust clearance remain unknown.

Sources