Seagate and Toshiba vie for TDK magnetic‑head unit, sending STX shares down about 9%

Seagate Technology and Japan’s Toshiba are locked in a multibillion‑dollar bidding contest for TDK Corp.’s hard‑disk‑drive magnetic‑head business. The rivalry was reported on October 6, 2026, and sparked a sharp sell‑off in Seagate’s stock. Analysts note the deal could strain Seagate’s balance sheet and compress margins, while insiders have sold a large block of shares over the past year.

The contest has pushed Seagate’s share price down roughly 9% in a single day, reducing market value and raising concerns about debt and cash‑flow pressure (TipRanks report). Analysts also point to the high valuation multiples as a risk factor for investors (GuruFocus analysis).

  • 1Seagate shares fell more than 2% to about $868 early Tuesday.
  • 2Seagate shares fell 9.5% in the afternoon session after the bidding contest report.
  • 3Seagate shares fell 9% to $805.63 on October 6, 2026.
  • 4Seagate reported fiscal 2026 revenue of $12.2 billion, up 34% year over year.
  • 5Insiders have sold $589.3 million worth of Seagate shares in the past year.
  • 6GuruFocus estimates Seagate is 311.3% overvalued at the current price.
  • Price drop figures differ: $868 (down >2%) vs $805.63 (down 9%).
  • Percent decline differs: 9.5% vs 9%.
  • Overvaluation percentages differ: 311.3% vs 312.4%.

Sources