Diodes (DIOD) vs Ultra Clean (UCTT)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 8, 2026.
Summary
Ultra Clean (UCTT) has outperformed Diodes (DIOD) over the past year, gaining 159.6% versus a gain of 97.2%. Over five years, UCTT leads with a +60.1% price change compared with +15.0% for DIOD. Diodes is the larger company by market cap ($4.64 billion vs $3.23 billion), about 1.4 times the size.
On valuation, Ultra Clean trades at a lower forward P/E (11.2x vs 17.3x for Diodes). Diodes converts more of its revenue into profit, with a net margin of 4.5% versus -8.8%.
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 | DIOD | UCTT |
|---|---|---|
| Share price | $100.65 | $71.42 |
| Market cap | $4.64B | $3.23B |
| 1-day change | -6.58% | -2.48% |
| YTD return | +103.99% | +181.96% |
| 1-year return | +97.24% | +159.61% |
| 5-year return | +14.98% | +60.10% |
| P/E ratio (TTM) | 53.82 | — |
| Forward P/E | 17.26 | 11.17 |
| EPS (TTM) | $1.87 | $-0.51 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| Revenue (latest FY) | $1.48B | $2.05B |
| Revenue growth (YoY) | +13.04% | -2.08% |
| Net income (latest FY) | $66.14M | $-181.20M |
| Gross margin | 31.20% | 15.72% |
| Operating margin | 2.39% | -5.23% |
| Net margin | 4.46% | -8.82% |
| 52-week high | $125.99 | $144.22 |
| 52-week low | $42.28 | $21.49 |
| Distance from 52-week high | -20.11% | -50.48% |
| Analyst consensus | strong_buy | strong_buy |
| Avg. price target upside | +52.34% | +87.62% |
| Average volume | 569.80K | 1.14M |
| Shares outstanding | 46.05M | 45.28M |
| Employees | 7,989 | 6,948 |
| 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
- UCTT has outperformed DIOD by 62.4 percentage points over the past year.
- Diodes is more profitable, keeping 4.5 cents of every revenue dollar as net income versus -8.8 cents for Ultra Clean.
- Diodes grew revenue faster in its latest fiscal year (+13.04% vs -2.08%).
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
About Ultra Clean
UCTT stock →Ultra Clean Holdings, Inc. develops and supplies critical subsystems, components and parts, and cleaning and analytical services for the semiconductor industry in the United States and internationally.
Technology · Semiconductors · 6,948 employees
DIOD vs UCTT FAQ
Which is bigger, Diodes or Ultra Clean?
Diodes (DIOD) is larger, with a market capitalization of $4.64B compared with $3.23B for Ultra Clean (UCTT).
Which stock has performed better over the past year, DIOD or UCTT?
UCTT returned +159.61% over the past 12 months, compared with +97.24% for DIOD (price return, excluding dividends). Past performance does not predict future results.
Are Diodes and Ultra Clean in the same industry?
Yes. Both are classified in the Semiconductors industry within the Technology sector.