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 (14.7 vs 55.3); year to date, Seagate leads (+193.2% vs +135.3%).
Side by side
| STX | WDC | |
|---|---|---|
| Market cap | $176B | $139B |
| Price | $774.83 | $393.31 |
| Today | −4.1% | −3.0% |
| Return YTD | +193.2% | +135.3% |
| Return 1Y | +258.9% | +238.0% |
| Since June 26, 2026 | −13.9% | −32.9% |
| P/E | 55.3 | 14.7 |
| P/S | 14.4 | 10.7 |
| P/B | 81.3 | 15.7 |
Data as of 2026-10-08 · updates daily after U.S. close
Since June 26, 2026: the change in the closing price, from the daily closes Sectivia records itself since that date.
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.