Applied Optoelectronics (AAOI) vs Digi International (DGII)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 10, 2026.
Summary
Applied Optoelectronics (AAOI) has outperformed Digi International (DGII) over the past year, gaining 238.7% versus a gain of 106.5%. Over five years, AAOI leads with a +1418.6% price change compared with +255.1% for DGII. Applied Optoelectronics is the larger company by market cap ($9.31 billion vs $2.87 billion), about 3.2 times the size.
On valuation, Applied Optoelectronics trades at a lower forward P/E (23.8x vs 24.1x for Digi International). Digi International converts more of its revenue into profit, with a net margin of 9.5% 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 | DGII |
|---|---|---|
| Share price | $109.64 | $75.63 |
| Market cap | $9.31B | $2.87B |
| 1-day change | +3.53% | +0.93% |
| YTD return | +214.52% | +74.71% |
| 1-year return | +238.71% | +106.53% |
| 5-year return | +1418.56% | +255.07% |
| P/E ratio (TTM) | — | 60.02 |
| Forward P/E | 23.82 | 24.15 |
| EPS (TTM) | $-0.75 | $1.26 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| Revenue (latest FY) | $455.71M | $430.22M |
| Revenue growth (YoY) | +82.75% | +1.46% |
| Net income (latest FY) | $-38.23M | $40.80M |
| Gross margin | 30.04% | 62.92% |
| Operating margin | -11.98% | 13.08% |
| Net margin | -8.39% | 9.48% |
| 52-week high | $233.67 | $86.84 |
| 52-week low | $18.50 | $34.41 |
| Distance from 52-week high | -53.08% | -12.91% |
| Analyst consensus | none | strong_buy |
| Avg. price target upside | +49.03% | +12.92% |
| Average volume | 9.74M | 375.36K |
| Shares outstanding | 84.91M | 37.95M |
| Employees | 4,691 | 913 |
| Sector | Technology | Telecommunications |
| Industry | Semiconductors | Computer Communications Equipment |
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
- Applied Optoelectronics is about 3.2 times larger than Digi International by market value ($9.31B vs $2.87B).
- AAOI has outperformed DGII by 132.2 percentage points over the past year.
- Digi International is more profitable, keeping 9.5 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 +1.46%).
- The two companies sit in different sectors: Applied Optoelectronics in Technology and Digi International in Telecommunications.
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 Digi International
DGII stock →Digi International Inc. provides business and mission-critical Internet of Things (IoT) connectivity products, services, and solutions in the United States, Europe, the Middle East, Africa, and internationally.
Telecommunications · Computer Communications Equipment · 913 employees
AAOI vs DGII FAQ
Which is bigger, Applied Optoelectronics or Digi International?
Applied Optoelectronics (AAOI) is larger, with a market capitalization of $9.31B compared with $2.87B for Digi International (DGII).
Which stock has performed better over the past year, AAOI or DGII?
AAOI returned +238.71% over the past 12 months, compared with +106.53% for DGII (price return, excluding dividends). Past performance does not predict future results.
Are Applied Optoelectronics and Digi International in the same industry?
No. Applied Optoelectronics is in the Technology sector, while Digi International is in Telecommunications.