First Solar (FSLR) 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
Rambus (RMBS) has outperformed First Solar (FSLR) over the past year, gaining 15.1% versus a loss of 21.4%. Over five years, RMBS leads with a +402.2% price change compared with +71.4% for FSLR. First Solar is the larger company by market cap ($19.45 billion vs $12.00 billion), about 1.6 times the size, while Rambus is growing revenue faster (+27.1% vs +24.1%).
On valuation, First Solar trades at a lower forward P/E (7.8x vs 29.7x for Rambus). Rambus converts more of its revenue into profit, with a net margin of 32.6% versus 29.3%.
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 | FSLR | RMBS |
|---|---|---|
| Share price | $180.96 | $110.60 |
| Market cap | $19.45B | $12.00B |
| 1-day change | +0.46% | -0.79% |
| YTD return | -31.46% | +21.32% |
| 1-year return | -21.44% | +15.12% |
| 5-year return | +71.37% | +402.16% |
| P/E ratio (TTM) | 11.16 | 50.73 |
| Forward P/E | 7.80 | 29.72 |
| EPS (TTM) | $16.22 | $2.18 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| Revenue (latest FY) | $5.22B | $707.63M |
| Revenue growth (YoY) | +24.09% | +27.13% |
| Net income (latest FY) | $1.53B | $230.46M |
| Gross margin | 40.62% | 79.59% |
| Operating margin | 30.59% | 36.77% |
| Net margin | 29.28% | 32.57% |
| 52-week high | $320.95 | $174.10 |
| 52-week low | $168.60 | $77.89 |
| Distance from 52-week high | -43.62% | -36.47% |
| Analyst consensus | buy | strong_buy |
| Avg. price target upside | +52.38% | +28.00% |
| Average volume | 2.26M | 2.43M |
| Shares outstanding | 107.47M | 108.46M |
| Employees | 7,900 | 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
- RMBS has outperformed FSLR by 36.6 percentage points over the past year.
- Rambus trades at a higher earnings multiple (50.7x vs 11.2x trailing P/E).
About First Solar
FSLR stock →First Solar, Inc., a solar technology company, provides photovoltaic (PV) solar energy solutions in the United States, France, India, Chile, and internationally. The company manufactures and sells PV solar modules with thin film semiconductor technology that provides conventional crystalline silicon PV solar modules.
Technology · Semiconductors · 7,900 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
FSLR vs RMBS FAQ
Which is bigger, First Solar or Rambus?
First Solar (FSLR) is larger, with a market capitalization of $19.45B compared with $12.00B for Rambus (RMBS).
Which stock has performed better over the past year, FSLR or RMBS?
RMBS returned +15.12% over the past 12 months, compared with -21.44% for FSLR (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, FSLR or RMBS?
FSLR has the lower trailing P/E at 11.2, versus 50.7 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.
Are First Solar and Rambus in the same industry?
Yes. Both are classified in the Semiconductors industry within the Technology sector.