Who Seagate buys from and sells to
Makes hard disk drives, led by HAMR-based Mozaic nearline drives for cloud data centres.
Buys from 2
- NidecNJDCYspindle motors
- Glass substrate suppliersplatters for HAMR media
Sells to 3
- Hyperscalersnearline exabytes allocated into 2028one customer ~14% of FY2026 revenue (10-K)
- MicrosoftMSFTMozaic HAMR drives for Azure
- AmazonAMZNnearline drives for AWS
Where the chain could break
- Data centres take about 90% of exabytes under long-term agreements
- Heads and media made in-house in Asia; HAMR ramp has no second process
Competes with
- Western DigitalWDCnearline drives sold to the same clouds
- Toshibathe third HDD maker
Mapped by hand from filings and company reporting, as of October 2026. It shows the relationships that matter most, not every contract: most are never disclosed, and agreements change.