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 2.7× larger than Monolithic Power by market cap; Western Digital trades at the lower P/E (27.7 vs 97.6); year to date, Western Digital leads (+238.2% vs +49.2%).
Side by side
| MPWR | WDC | |
|---|---|---|
| Market cap | $66.5B | $181B |
| Price | $1,352.74 | $582.59 |
| Today | −1.6% | +0.8% |
| Return YTD | +49.2% | +238.2% |
| Return 1Y | +82.7% | +795.5% |
| P/E | 97.6 | 27.7 |
| P/S | 22.5 | 15.3 |
| P/B | 18.1 | 18.7 |
Data as of 2026-07-11 · updates daily after U.S. close
The two companies
Monolithic PowerMPWR
Analog power-management chips that control power delivery in AI servers, data centers, cars and industry — a critical part of modern AI racks.
Full MPWR profile →Western DigitalWDC
Manufacturer of hard drives for data centers. AI is creating record demand for massive, low-cost storage of training data.
Full WDC profile →More comparisons in Chips & accelerators
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 →