The short version

From the latest prices and each company's SEC filings. Who's ahead on each measure, not which to buy.

  • KLA is the larger company, worth $24.3B, about 1.8 times Onto Innovation.
  • Onto Innovation grew revenue faster over the last year (+35.3% vs +15.2%).
  • On earnings, KLA is the cheaper stock (5.3x vs 125.9x).
  • Onto Innovation's price assumes faster free cash flow growth: about 16% a year, against -10% for KLA (reverse DCF).

Side by side

The stronger figure is shaded where higher (or, for valuation multiples, lower) reads as better. How the implied growth works.

MeasureKLACONTO
Market cap$24.3B$13.5B
Share price$195.57$294.53
Revenue (last fiscal year)$13.6B$1.0B
Free cash flow (last fiscal year)$3.8B$300M
Revenue growth, last year+15.2%+35.3%
Revenue growth per year, last 5 fiscal years+10.2%+6.2%
Operating margin—12.0%
Net margin35.6%11.8%
Return on equity76.1%6.9%
P/E (trailing)5.26x125.9x
Price / free cash flow6.48x44.9x
EV / EBITDA6.39x56.7x
FCF growth the price implies-10.3%15.6%
Dividend yield4.0%—
Debt / equity1.83x0.92x
Fundamental gradeAC
Superinvestors holding it76
Insider purchases, last 12 months60

Results from SEC filings

Revenue and free cash flow by fiscal year, from each company's 10-K filings.

KLA

YearRevenueFree cash flowOp. margin
2022$9.2B$3.0B—
2023$10.5B$3.3B—
2024$9.8B$3.0B—
2025$12.2B$3.7B—
2026$13.6B$3.8B—

Onto Innovation

YearRevenueFree cash flowOp. margin
2021$789M$163M-19.8%
2022$1.0B$118M23.5%
2023$816M$149M14.2%
2024$987M$214M19.0%
2025$1.0B$300M13.2%

Where the revenue comes from

KLA · by segments, 2026

Semiconductor Process Control$12.2B90%
PCB and Component Inspection$750M6%
Specialty Semiconductor Process$584M4%

Onto Innovation · by products, 2025

Systems and Software$848M84%
Parts Revenue$84M8%
Service Revenue$73M7%
Compare them in fullFifteen years of statements, quarterly results, DCF and IRR models, and any number of peers side by side.
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Questions

Which is bigger, KLA or Onto Innovation?

KLA (KLAC), at $24.3B against $13.5B.

Is KLAC or ONTO cheaper?

By trailing P/E, KLA (5.26x) is cheaper than Onto Innovation (125.9x). A lower multiple can also mean the market expects less growth.

Which grows faster, KLAC or ONTO?

Onto Innovation: revenue grew +35.3% over the last year, against +15.2%.

Prices and ratios as of the last daily update; statements from SEC filings. Information only, not investment advice.