Arm Holdingsvs.Monolithic Power
ARM vs MPWR · 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 4.5× larger than Monolithic Power by market cap; Monolithic Power trades at the lower P/E (87.1 vs 301.1); year to date, Arm Holdings leads (+176.8% vs +57.3%).
Side by side
| ARM | MPWR | |
|---|---|---|
| Market cap | $314B | $70.1B |
| Price | $275.29 | $1,369.80 |
| Today | −6.5% | −3.9% |
| Return YTD | +176.8% | +57.3% |
| Return 1Y | +93.7% | +50.8% |
| Since July 2, 2026 | −12.7% | +6.3% |
| P/E | 301.1 | 87.1 |
| P/S | 61.0 | 21.4 |
| P/B | 36.4 | 18.0 |
Data as of 2026-10-08 · updates daily after U.S. close
Since July 2, 2026: the change in the closing price from the first session with a close for both companies. Sectivia records these closes itself, starting June 26, 2026.
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 →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 →More ARM & MPWR comparisons
Other head-to-heads in the Chips & accelerators segment.