Amkor Technology (AMKR) vs Rambus (RMBS)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 8, 2026.
Summary
Amkor Technology (AMKR) has outperformed Rambus (RMBS) over the past year, gaining 75.7% versus a gain of 15.1%. Over five years, RMBS leads with a +402.2% price change compared with +135.6% for AMKR. Amkor Technology is the larger company by market cap ($12.99 billion vs $12.09 billion), about 1.1 times the size, while Rambus is growing revenue faster (+27.1% vs +6.2%).
On valuation, Amkor Technology trades at a lower forward P/E (18.6x vs 30.0x for Rambus). Amkor Technology pays a dividend yielding 0.64%, while Rambus does not currently pay one. Rambus converts more of its revenue into profit, with a net margin of 32.6% versus 5.6%.
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 | AMKR | RMBS |
|---|---|---|
| Share price | $52.27 | $111.48 |
| Market cap | $12.99B | $12.09B |
| 1-day change | -2.10% | -2.29% |
| YTD return | +32.40% | +21.32% |
| 1-year return | +75.70% | +15.12% |
| 5-year return | +135.56% | +402.16% |
| P/E ratio (TTM) | 23.44 | 51.14 |
| Forward P/E | 18.63 | 29.96 |
| EPS (TTM) | $2.23 | $2.18 |
| Dividend yield | 0.64% | 0.00% |
| Annual dividend | $0.333 | $0.00 |
| Revenue (latest FY) | $6.71B | $707.63M |
| Revenue growth (YoY) | +6.18% | +27.13% |
| Net income (latest FY) | $373.89M | $230.46M |
| Gross margin | 13.99% | 79.59% |
| Operating margin | 6.97% | 36.77% |
| Net margin | 5.57% | 32.57% |
| 52-week high | $96.68 | $174.10 |
| 52-week low | $28.19 | $77.89 |
| Distance from 52-week high | -45.94% | -35.97% |
| Analyst consensus | none | strong_buy |
| Avg. price target upside | +46.16% | +26.99% |
| Average volume | 4.73M | 2.45M |
| Shares outstanding | 248.45M | 108.46M |
| Employees | 30,800 | 791 |
| 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
- AMKR has outperformed RMBS by 60.6 percentage points over the past year.
- Rambus trades at a higher earnings multiple (51.1x vs 23.4x trailing P/E).
- Rambus is more profitable, keeping 32.6 cents of every revenue dollar as net income versus 5.6 cents for Amkor Technology.
- Rambus grew revenue faster in its latest fiscal year (+27.13% vs +6.18%).
About Amkor Technology
AMKR stock →Amkor Technology, Inc. provides outsourced semiconductor packaging and test services in the United States, Japan, Europe, and the Asia Pacific.
Technology · Semiconductors · 30,800 employees
About Rambus
RMBS stock →Rambus Inc. manufactures and sells semiconductor products in the United States, South Korea, Singapore, and internationally.
Technology · Semiconductors · 791 employees
AMKR vs RMBS FAQ
Which is bigger, Amkor Technology or Rambus?
Amkor Technology (AMKR) is larger, with a market capitalization of $12.99B compared with $12.09B for Rambus (RMBS).
Which stock has performed better over the past year, AMKR or RMBS?
AMKR returned +75.70% over the past 12 months, compared with +15.12% for RMBS (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, AMKR or RMBS?
AMKR has the lower trailing P/E at 23.4, versus 51.1 for RMBS. 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, Amkor Technology or Rambus?
Amkor Technology pays a dividend yielding 0.64%, while Rambus does not currently pay a regular dividend.
Are Amkor Technology and Rambus in the same industry?
Yes. Both are classified in the Semiconductors industry within the Technology sector.