Monolithic Power Systems (MPWR, US) is a USA company in the Power Supply segment of the AI compute value chain. As of October 04, 2026, its market cap is $70.8 billion ($70.8B), ranking #43 of 244 companies overall and #3 of 12 in the Power Supply segment (15.6% of the segment, 0.28% of the chain). Over the past year the stock gained 54.7% (52-week range 856.96 – 1,689.89 USD).
| Company | Monolithic Power Systems（芯源系统） |
|---|---|
| Ticker | MPWR · US |
| Segment | Power Supply |
| Headquarters | USA |
| Market cap | $70.8B（$70.8 billion） |
| Close | 1,439.73 USD (October 04, 2026) |
| Today | +5.79% |
| 30 days | +9.85% |
| 1 year | +54.72% |
| 52-wk high / low | 1,689.89 / 856.96 USD |
| Share of segment | 15.6% (Power Supply: 12 companies) |
| Share of chain | 0.28% (244 companies combined) |
| Segment leader | Eaton ($169.4B) |
| # | Company | Market | Market cap |
|---|---|---|---|
| 1 | Eaton ETN | US | $169.4B |
| 2 | Delta Electronics 2308.TW | TW | $153.7B |
| 3 | Monolithic Power Systems MPWR | US | $70.8B |
| 4 | Lite-On Technology 2301.TW | TW | $20.5B |
| 5 | Vicor Corporation VICR | US | $14.2B |
| 6 | Megmeet Electrical 002851 | SZ | $10.1B |
| 7 | Honor Electronic 300870 | SZ | $4.0B |
| 8 | Kehua Data 002335 | SZ | $3.4B |
| 9 | Zhongheng Electric 002364 | SZ | $2.7B |
| 10 | East Group 300376 | SZ | $1.4B |