Arm Holdingsvs.Western Digital
ARM 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.
Arm Holdings is about 1.9× larger than Western Digital by market cap; Western Digital trades at the lower P/E (16.6 vs 278.1); year to date, Western Digital leads (+152.7% vs +118.4%).
Side by side
| ARM | WDC | |
|---|---|---|
| Market cap | $290B | $157B |
| Price | $241.56 | $450.75 |
| Today | +1.2% | +3.5% |
| Return YTD | +118.4% | +152.7% |
| Return 1Y | +73.1% | +465.6% |
| P/E | 278.1 | 16.6 |
| P/S | 56.3 | 12.1 |
| P/B | 33.6 | 17.7 |
Data as of 2026-08-26 · updates daily after U.S. close
The two companies
Arm HoldingsARM
Licensing, not manufacturing: the CPU architectures and instruction sets (Cortex, Neoverse) that nearly every mobile and server chip is built around come from Arm, which takes a royalty on each chip produced.
Full ARM profile →Western DigitalWDC
Hard drives for data centres, where AI has pushed demand for cheap bulk capacity to records.
Full WDC profile →More ARM & WDC comparisons
Other head-to-heads in the Chips & accelerators segment.