Allegro MicroSystems (ALGM) vs Diodes (DIOD)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 7, 2026.
Summary
Diodes (DIOD) has outperformed Allegro MicroSystems (ALGM) over the past year, gaining 96.3% versus a gain of 34.3%. Over five years, ALGM leads with a +17.8% price change compared with +14.4% for DIOD. Allegro MicroSystems is the larger company by market cap ($6.90 billion vs $4.64 billion), about 1.5 times the size.
On valuation, Diodes trades at a lower forward P/E (17.3x vs 25.0x for Allegro MicroSystems). Diodes converts more of its revenue into profit, with a net margin of 4.5% versus -1.7%.
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 | ALGM | DIOD |
|---|---|---|
| Share price | $37.03 | $100.65 |
| Market cap | $6.90B | $4.64B |
| 1-day change | -4.46% | -6.58% |
| YTD return | +40.03% | +103.02% |
| 1-year return | +34.33% | +96.30% |
| 5-year return | +17.83% | +14.43% |
| P/E ratio (TTM) | 617.17 | 53.82 |
| Forward P/E | 25.04 | 17.26 |
| EPS (TTM) | $0.06 | $1.87 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| Revenue (latest FY) | $890.10M | $1.48B |
| Revenue growth (YoY) | +22.77% | +13.04% |
| Net income (latest FY) | $-14.90M | $66.14M |
| Gross margin | 46.28% | 31.20% |
| Operating margin | 2.08% | 2.39% |
| Net margin | -1.67% | 4.46% |
| 52-week high | $71.77 | $125.99 |
| 52-week low | $22.41 | $42.28 |
| Distance from 52-week high | -48.40% | -20.11% |
| Analyst consensus | strong_buy | strong_buy |
| Avg. price target upside | +46.96% | +52.34% |
| Average volume | 2.39M | 568.69K |
| Shares outstanding | 186.40M | 46.05M |
| Employees | 4,250 | 7,989 |
| 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
- DIOD has outperformed ALGM by 62.0 percentage points over the past year.
- Allegro MicroSystems trades at a higher earnings multiple (617.2x vs 53.8x trailing P/E).
- Diodes is more profitable, keeping 4.5 cents of every revenue dollar as net income versus -1.7 cents for Allegro MicroSystems.
- Allegro MicroSystems grew revenue faster in its latest fiscal year (+22.77% vs +13.04%).
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
About Diodes
DIOD stock →Diodes Incorporated, together with its subsidiaries, provides semiconductor products in Asia, the Americas, and Europe. The company offers MOSFET and SiC MOSFET discrete semiconductor products; data line protection, power line protection, thyrister, USB Type-C protection, and transient voltage suppressor protection devices; Schottky diodes, small signal switching diodes, Zener diodes, and SiC diodes; and bridges, super barrier rectifiers, Schottky rectifiers, Schottky bridge rectifiers, and fast and ultra-fast rectifiers.
Technology · Semiconductors · 7,989 employees
ALGM vs DIOD FAQ
Which is bigger, Allegro MicroSystems or Diodes?
Allegro MicroSystems (ALGM) is larger, with a market capitalization of $6.90B compared with $4.64B for Diodes (DIOD).
Which stock has performed better over the past year, ALGM or DIOD?
DIOD returned +96.30% over the past 12 months, compared with +34.33% for ALGM (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, ALGM or DIOD?
DIOD has the lower trailing P/E at 53.8, versus 617.2 for ALGM. A lower P/E is not by itself a sign of a better investment; it can reflect slower expected growth or higher risk.
Are Allegro MicroSystems and Diodes in the same industry?
Yes. Both are classified in the Semiconductors industry within the Technology sector.