Monolithic Powervs.Western Digital
MPWR 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.
Western Digital is about 2.2× larger than Monolithic Power by market cap; Western Digital trades at the lower P/E (16.6 vs 86.8); year to date, Western Digital leads (+152.7% vs +41.8%).
Side by side
| MPWR | WDC | |
|---|---|---|
| Market cap | $69.8B | $157B |
| Price | $1,304.15 | $450.75 |
| Today | +1.5% | +3.5% |
| Return YTD | +41.8% | +152.7% |
| Return 1Y | +52.3% | +465.6% |
| P/E | 86.8 | 16.6 |
| P/S | 21.3 | 12.1 |
| P/B | 17.9 | 17.7 |
Data as of 2026-08-26 · updates daily after U.S. close
The two companies
Monolithic PowerMPWR
Everything here is power delivery: the chips and modules that feed processors in AI server racks, with cars and industrial equipment taking the same parts.
Full MPWR profile →Western DigitalWDC
Hard drives for data centres, where AI has pushed demand for cheap bulk capacity to records.
Full WDC profile →More MPWR & WDC comparisons
Other head-to-heads in the Chips & accelerators segment.
See where MPWR and WDC sit in the full AI & digital infrastructure map: every segment from suppliers to end markets.Open the AI value chain →