Monolithic Power Systems (MPWR) vs United Microelectronics (NEW) (UMC)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 7, 2026.
Summary
United Microelectronics (NEW) (UMC) has outperformed Monolithic Power Systems (MPWR) over the past year, gaining 219.8% versus a gain of 51.2%. Over five years, MPWR leads with a +197.1% price change compared with +124.4% for UMC. Monolithic Power Systems is the larger company by market cap ($70.08 billion vs $58.46 billion), about 1.2 times the size.
On valuation, United Microelectronics (NEW) trades at a lower forward P/E (26.5x vs 40.8x for Monolithic Power Systems). United Microelectronics (NEW) offers the higher dividend yield (11.15% vs 0.50%). Monolithic Power Systems converts more of its revenue into profit, with a net margin of 22.3% versus 21.0%.
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | MPWR | UMC |
|---|---|---|
| Share price | $1,425.98 | $23.31 |
| Market cap | $70.08B | $58.46B |
| 1-day change | -3.24% | +0.52% |
| YTD return | +57.68% | +196.56% |
| 1-year return | +51.16% | +219.75% |
| 5-year return | +197.10% | +124.35% |
| P/E ratio (TTM) | 86.74 | 21.99 |
| Forward P/E | 40.77 | 26.54 |
| EPS (TTM) | $16.44 | $1.06 |
| Dividend yield | 0.50% | 11.15% |
| Annual dividend | $7.12 | $2.60 |
| Revenue (latest FY) | $2.79B | $7.08B |
| Revenue growth (YoY) | +26.43% | -2.52% |
| Net income (latest FY) | $621.48M | $1.49B |
| Gross margin | 55.18% | 32.57% |
| Operating margin | 26.11% | 22.22% |
| Net margin | 22.27% | 21.00% |
| 52-week high | $1,714.09 | $28.96 |
| 52-week low | $833.18 | $6.97 |
| Distance from 52-week high | -16.81% | -19.51% |
| Analyst consensus | strong_buy | underperform |
| Avg. price target upside | +29.02% | -42.51% |
| Average volume | 745.22K | 13.17M |
| Shares outstanding | 49.14M | 2.51B |
| Employees | 4,501 | 20,000 |
| Sector | Technology | Technology |
| Industry | Semiconductors | Semiconductors |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- UMC has outperformed MPWR by 168.6 percentage points over the past year.
- Monolithic Power Systems trades at a higher earnings multiple (86.7x vs 22.0x trailing P/E).
- United Microelectronics (NEW) offers a meaningfully higher dividend yield (11.15% vs 0.50%).
- Monolithic Power Systems grew revenue faster in its latest fiscal year (+26.43% vs -2.52%).
About Monolithic Power Systems
MPWR stock →Monolithic Power Systems, Inc. provides semiconductor-based power electronics solutions in China, Taiwan, South Korea, Southeast Asia, Europe, the United States, Japan, and internationally.
Technology · Semiconductors · 4,501 employees
About United Microelectronics (NEW)
UMC stock →United Microelectronics Corporation operates as a semiconductor wafer foundry in Taiwan, China, Hong Kong, Japan, Korea, the United States, Europe, and internationally. It manufactures and sells integrated circuits.
Technology · Semiconductors · 20,000 employees
MPWR vs UMC FAQ
Which is bigger, Monolithic Power Systems or United Microelectronics (NEW)?
Monolithic Power Systems (MPWR) is larger, with a market capitalization of $70.08B compared with $58.46B for United Microelectronics (NEW) (UMC).
Which stock has performed better over the past year, MPWR or UMC?
UMC returned +219.75% over the past 12 months, compared with +51.16% for MPWR (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, MPWR or UMC?
UMC has the lower trailing P/E at 22.0, versus 86.7 for MPWR. A lower P/E is not by itself a sign of a better investment; it can reflect slower expected growth or higher risk.
Which pays a higher dividend, Monolithic Power Systems or United Microelectronics (NEW)?
United Microelectronics (NEW) has the higher yield at 11.15%, compared with 0.50% for Monolithic Power Systems.
Are Monolithic Power Systems and United Microelectronics (NEW) in the same industry?
Yes. Both are classified in the Semiconductors industry within the Technology sector.