ASE Technology (ASX) vs United Microelectronics (NEW) (UMC)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 8, 2026.
Summary
ASE Technology (ASX) has outperformed United Microelectronics (NEW) (UMC) over the past year, gaining 302.1% versus a gain of 219.8%. Over five years, ASX leads with a +565.1% price change compared with +124.4% for UMC. ASE Technology is the larger company by market cap ($101.26 billion vs $57.82 billion), about 1.8 times the size.
On valuation, ASE Technology trades at a lower forward P/E (23.6x vs 26.3x for United Microelectronics (NEW)). United Microelectronics (NEW) pays a dividend yielding 11.28%, while ASE Technology does not currently pay one. United Microelectronics (NEW) converts more of its revenue into profit, with a net margin of 21.0% versus 6.2%.
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 | ASX | UMC |
|---|---|---|
| Share price | $46.05 | $23.06 |
| Market cap | $101.26B | $57.82B |
| 1-day change | +0.63% | -1.09% |
| YTD return | +184.22% | +196.56% |
| 1-year return | +302.11% | +219.75% |
| 5-year return | +565.12% | +124.35% |
| P/E ratio (TTM) | 54.82 | 21.75 |
| Forward P/E | 23.58 | 26.25 |
| EPS (TTM) | $0.84 | $1.06 |
| Dividend yield | 0.91% | 11.28% |
| Annual dividend | $0.00 | $2.60 |
| Revenue (latest FY) | $20.57B | $7.08B |
| Revenue growth (YoY) | +13.30% | -2.52% |
| Net income (latest FY) | $1.28B | $1.49B |
| Gross margin | 17.69% | 32.57% |
| Operating margin | 7.97% | 22.22% |
| Net margin | 6.20% | 21.00% |
| 52-week high | $47.93 | $28.96 |
| 52-week low | $11.07 | $6.97 |
| Distance from 52-week high | -3.92% | -20.39% |
| Analyst consensus | none | underperform |
| Avg. price target upside | +10.75% | -41.88% |
| Average volume | 7.44M | 13.03M |
| Shares outstanding | 2.20B | 2.51B |
| Employees | 114,179 | 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
- ASX has outperformed UMC by 82.4 percentage points over the past year.
- ASE Technology trades at a higher earnings multiple (54.8x vs 21.8x trailing P/E).
- United Microelectronics (NEW) offers a meaningfully higher dividend yield (11.28% vs 0.91%).
- United Microelectronics (NEW) is more profitable, keeping 21.0 cents of every revenue dollar as net income versus 6.2 cents for ASE Technology.
- ASE Technology grew revenue faster in its latest fiscal year (+13.30% vs -2.52%).
About ASE Technology
ASX stock →ASE Technology Holding Co., Ltd., together with its subsidiaries, provides semiconductor manufacturing services in the United States, Taiwan, rest of Asia, Europe, and internationally. It operates through Packaging, Testing, and EMS.
Technology · Semiconductors · 114,179 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
ASX vs UMC FAQ
Which is bigger, ASE Technology or United Microelectronics (NEW)?
ASE Technology (ASX) is larger, with a market capitalization of $101.26B compared with $57.82B for United Microelectronics (NEW) (UMC).
Which stock has performed better over the past year, ASX or UMC?
ASX returned +302.11% over the past 12 months, compared with +219.75% for UMC (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, ASX or UMC?
UMC has the lower trailing P/E at 21.8, versus 54.8 for ASX. 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, ASE Technology or United Microelectronics (NEW)?
United Microelectronics (NEW) has the higher yield at 11.28%, compared with 0.91% for ASE Technology.
Are ASE Technology and United Microelectronics (NEW) in the same industry?
Yes. Both are classified in the Semiconductors industry within the Technology sector.