Applied Optoelectronics, Inc. (AAOI) vs KLA Corporation (KLAC)
The same free fields, in the same order, for both companies, so a figure on one line can be read straight across.
This page states measurements and nothing else. It does not rank the two companies, name one of them, or draw a conclusion from the figures.
Data as of Oct 27, 2026, for both companies.
The figures, field by field
A dash means the snapshot carries no figure for that company on that line. A line is dropped only when neither company has it, so a dash beside a figure is a fact about coverage, not about either company.
| AAOI | KLAC | |
|---|---|---|
| Sector | Technology | Technology |
| Industry | Communication Equipment | Semiconductor Equipment & Materials |
| Size band | MID | LARGE |
| Listing | Nasdaq GM | Nasdaq GS |
| Country | United States | United States |
| Theme | telecom-equipment | semiconductor-equipment |
| Price and returns | ||
| Last close | $71.94 | $149.21 |
| Return · 1 week | −8.01% | −10.33% |
| Return · 1 month | −25.70% | −21.12% |
| Return · 3 months | −18.38% | −21.80% |
| Return · year to date | +81.67% | −88.26% |
| Return · 1 year | +93.28% | −87.67% |
| Distance from the 52-week highThe last close measured against the highest close of the past 52 weeks. | −69.21% | −92.76% |
| 52-week high | $233.67 | $2,060.08 |
| 52-week low | $18.50 | $144.82 |
| Size and turnover | ||
| Market value · USDConverted to US dollars, so two companies listed in different currencies sit under one heading. | $6.11B | $194.72B |
| Turnover · median day, USDThe median value traded in a session over the past 50 sessions. | $667.79M | $1.33B |
| Employees | 4,691 | 17,000 |
| Valuation | ||
| Price to earnings · trailing | n/a (negative earnings) | 45.28× |
| Price to earnings · forward | 23.82× | 24.59× |
| Price to sales | 15.62× | 15.93× |
| Price to book | 5.55× | 34.12× |
| Enterprise value to EBITDA | n/a (negative EBITDA) | 35.97× |
| Enterprise value to revenue | 17.05× | 16.04× |
| PEG ratio | 0.78 | 1.58 |
| Earnings per share · trailing | -0.75 | 3.66 |
| Profitability | ||
| Gross margin | 28.92% | 61.30% |
| Operating margin | −12.88% | 42.49% |
| Profit margin | −9.57% | 35.57% |
| Return on equity | −5.45% | 87.50% |
| Return on assets | −2.72% | 20.80% |
| Growth | ||
| Revenue growth | +86.40% | +15.20% |
| Earnings growth | — | +13.80% |
| Balance sheet and payout | ||
| Debt / equity (%) | 17.99 | 96.88 |
| Current ratio | 2.78 | 2.88 |
| Dividend yield | 0.00% | 0.56% |
| Payout ratio | 0.00% | 21.86% |
| Trend and volatility | ||
| RSI · 14 | 34.72 | 27.35 |
| ADX · 14 | 27.48 | 28.45 |
| 50-day average | $103.36 | $181.34 |
| 200-day average | $113.33 | $891.41 |
| Average true range · share of priceAverage true range over 14 sessions, stated as a share of the last close, so it can be read across two share prices. | 12.37% | 5.37% |
The full AAOI analysis
Everything this table leaves out for Applied Optoelectronics, Inc.: the plain-language summary and key points, the accumulation read, signal history, full fundamentals, market context, and the case each side of the AAOI argument makes.
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Open the full AAOI analysisThe full KLAC analysis
Everything this table leaves out for KLA Corporation: the plain-language summary and key points, the accumulation read, signal history, full fundamentals, market context, and the case each side of the KLAC argument makes.
$9.90 per stock, one time, 30 days of access.
Open the full KLAC analysis