Seagate Sinks 12%, Western Digital Down 10% as Toshiba Plans to Double Hard Disk Output
Seagate (STX) and Western Digital (WDC) shares fell 12% and 10% respectively after Toshiba announced plans to double its hard disk drive production capacity for AI data centers by fiscal 2027, investing $380 million. Toshiba aims to increase its market share from 10% to 30%, targeting the same customers as Seagate and Western Digital. Seagate's gross margin has risen from 19.1% to 45.6% in three years, with consensus EPS estimates at $35.78 for fiscal 2027 and $55.37 for fiscal 2028.
How this was made
The 30-second read
Why it matters
The new supply threatens the scarcity premium that has driven Seagate's and Western Digital's recent margin expansion, prompting a sell‑off.
Market read
The capacity expansion announcement is a primary catalyst for a sharp, same‑day sell‑off in the two major U.S. HDD stocks.
What to watch
Toshiba's expansion timeline and actual ramp‑up speed may be slower than announced, limiting near‑term impact.
Background
The article reports a fresh announcement from Toshiba to double HDD output for AI data centers, triggering immediate price declines in the two leading U.S. HDD makers.
Ticker impact
Seagate shares fell ~12% after news that Toshiba will double HDD capacity, threatening Seagate's pricing power.
downward pressure as market prices in increased HDD supply.
The article links the price drop directly to Toshiba's capacity expansion, a fresh catalyst.
Western Digital shares dropped ~10% on the same Toshiba capacity expansion news.
downward pressure as investors reassess supply‑demand balance.
Price move is directly tied to the new supply threat, making the impact immediate.
Market effects
Hard‑disk drive sector may see compressed margins and lower pricing across the board.
Asian HDD manufacturers, especially Toshiba, could gain market share, affecting regional supply dynamics.
Potential ripple effect on data‑center capex budgeting worldwide.
Counterpoint
If AI data‑center demand outpaces the added supply, HDD prices could remain resilient despite the capacity boost.
Key entities
- companySeagate Technology
U.S. HDD manufacturer (ticker STX) whose shares fell ~12%.
- companyWestern Digital
U.S. HDD manufacturer (ticker WDC) whose shares fell ~10%.
- companyToshiba
Japanese HDD maker planning to double capacity; not U.S.-listed.
