Seagatevs.Western Digital
STX vs WDC · both in Chips & accelerators, part of the AI & digital infrastructure value chain: Designs and builds the processors, accelerators and memory that train and run AI.
Seagate is about 1.3× larger than Western Digital by market cap; Western Digital trades at the lower P/E (16.6 vs 65.6); year to date, Seagate leads (+188.6% vs +152.7%).
Side by side
| STX | WDC | |
|---|---|---|
| Market cap | $209B | $157B |
| Price | $821.67 | $450.75 |
| Today | +3.4% | +3.5% |
| Return YTD | +188.6% | +152.7% |
| Return 1Y | +399.1% | +465.6% |
| P/E | 65.6 | 16.6 |
| P/S | 17.1 | 12.1 |
| P/B | 96.4 | 17.7 |
Data as of 2026-08-26 · updates daily after U.S. close
The two companies
SeagateSTX
No one ships more hard drives. The HAMR-based Mozaic platform lifts capacity per drive sharply as cloud and AI data pile up.
Full STX profile →Western DigitalWDC
Hard drives for data centres, where AI has pushed demand for cheap bulk capacity to records.
Full WDC profile →More STX & WDC comparisons
Other head-to-heads in the Chips & accelerators segment.
See where STX and WDC sit in the full AI & digital infrastructure map: every segment from suppliers to end markets.Open the AI value chain →