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Seagate and Toshiba in bidding contest for TDK's HDD magnetic-head business; STX falls 9%, WDC -6.5%

What happened

Bloomberg reported Tuesday that Seagate Technology and Japan's Toshiba have entered a bidding contest to acquire TDK Corp's business that produces magnetic heads for hard-disk drives. The deal news hit an already-weak memory sector: Seagate shares sank about 9% and Western Digital fell roughly 6.5-7% as investors weighed the cost of a bidding war and broader fears that memory prices may be peaking.

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Who’s affected

  • Seagate (STX) — down ~9% Tuesday; investors wary of a bidding-war premium for the TDK unit
  • Western Digital (WDC) — down ~6.5-7% in sympathy and on memory-price peak fears
  • Toshiba (6502.T) — potential acquirer; TDK (6762.T) — potential seller, likely positive on proceeds
  • Memory/storage sector — extends Monday's selloff; Micron (MU) and peers already soft on WSTS data
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Smart Money Hub · build Oct 9, 2026, 2:02 PM EDT