Applied Optoelectronics (AAOI) vs Allegro MicroSystems (ALGM)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 9, 2026.
Summary
Applied Optoelectronics (AAOI) has outperformed Allegro MicroSystems (ALGM) over the past year, gaining 238.7% versus a gain of 28.3%. Over five years, AAOI leads with a +1418.6% price change compared with +15.7% for ALGM. Applied Optoelectronics is the larger company by market cap ($9.31 billion vs $6.63 billion), about 1.4 times the size.
On valuation, Applied Optoelectronics trades at a lower forward P/E (23.8x vs 24.1x for Allegro MicroSystems). Allegro MicroSystems converts more of its revenue into profit, with a net margin of -1.7% versus -8.4%.
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 | AAOI | ALGM |
|---|---|---|
| Share price | $109.64 | $35.57 |
| Market cap | $9.31B | $6.63B |
| 1-day change | +3.53% | -1.93% |
| YTD return | +214.52% | +37.49% |
| 1-year return | +238.71% | +28.25% |
| 5-year return | +1418.56% | +15.69% |
| P/E ratio (TTM) | — | 592.83 |
| Forward P/E | 23.82 | 24.05 |
| EPS (TTM) | $-0.75 | $0.06 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| Revenue (latest FY) | $455.71M | $890.10M |
| Revenue growth (YoY) | +82.75% | +22.77% |
| Net income (latest FY) | $-38.23M | $-14.90M |
| Gross margin | 30.04% | 46.28% |
| Operating margin | -11.98% | 2.08% |
| Net margin | -8.39% | -1.67% |
| 52-week high | $233.67 | $71.77 |
| 52-week low | $18.50 | $22.41 |
| Distance from 52-week high | -53.08% | -50.44% |
| Analyst consensus | none | strong_buy |
| Avg. price target upside | +49.03% | +52.99% |
| Average volume | 9.62M | 2.34M |
| Shares outstanding | 84.91M | 186.40M |
| Employees | 4,691 | 4,250 |
| 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
- AAOI has outperformed ALGM by 210.5 percentage points over the past year.
- Allegro MicroSystems is more profitable, keeping -1.7 cents of every revenue dollar as net income versus -8.4 cents for Applied Optoelectronics.
- Applied Optoelectronics grew revenue faster in its latest fiscal year (+82.75% vs +22.77%).
About Applied Optoelectronics
AAOI stock →Applied Optoelectronics, Inc. engages in the design, manufacture, and sale of fiber-optic networking products in the United States, Taiwan, and China.
Technology · Semiconductors · 4,691 employees
About Allegro MicroSystems
ALGM stock →Allegro MicroSystems, Inc., together with its subsidiaries, designs, develops, manufactures, and markets sensor integrated circuits (ICs) and application-specific power ICs for sensing, motion control, and power management functions of complex electromechanical or power conversion systems. Its products include magnetic sensor ICs, such as position, speed, and electric current sensor ICs; and power ICs comprising motor driver ICs, such as regulator, power management ICs, and LED driver ICs, and isolated gate drivers.
Technology · Semiconductors · 4,250 employees
AAOI vs ALGM FAQ
Which is bigger, Applied Optoelectronics or Allegro MicroSystems?
Applied Optoelectronics (AAOI) is larger, with a market capitalization of $9.31B compared with $6.63B for Allegro MicroSystems (ALGM).
Which stock has performed better over the past year, AAOI or ALGM?
AAOI returned +238.71% over the past 12 months, compared with +28.25% for ALGM (price return, excluding dividends). Past performance does not predict future results.
Are Applied Optoelectronics and Allegro MicroSystems in the same industry?
Yes. Both are classified in the Semiconductors industry within the Technology sector.