Onto Innovation Inc
NYSE: ONTO · TECHNOLOGY · SEMICONDUCTOR EQUIPMENT & MATERIALS
Updated 2026-04-29
Onto Innovation Inc (ONTO) Stock Valuation Analysis
Fair value estimate, historical valuation range, and quality signals for ONTO.
Current price exceeds what fundamentals support. Risk/reward skewed unfavorably.
ONTO historical valuation range
Where current P/E sits in ONTO's own 5Y range.
ONTO intrinsic value (DCF)
DCF-based fair value estimate vs current market price.
Standard discounted cash flow models produce unreliable output for unprofitable or near-breakeven companies. Revenue-based multiples such as P/S and EV/Sales, combined with the historical valuation position above, give a more reliable read for this stock.
Intrinsic value calculated using discounted cash flow (DCF) model based on projected free cash flows, discount rate, and terminal growth assumptions. A positive margin of safety indicates the current price is below estimated fair value, providing a cushion against estimation error.
ONTO valuation signals
Quick-read green flags, caution flags, and risks based on current metrics.
P/E Ratio — History
Current: 101.91x
P/S Ratio — History
Current: 14.07x
Is ONTO overvalued in 2026?
Onto Innovation Inc (ONTO) currently trades at $284.34 per share with a market capitalization of $14,144,086,000.00. Based on our multi-factor framework, the stock appears richly valued with a Smart Value Score of 46/100. This score blends growth quality, financial health, and price attractiveness into a single institutional-grade read.
The stock trades at a P/E ratio of 101.9x, above its 5-year median of 41.0x. The PEG ratio of 1.36 points to a price that reasonably reflects expected earnings growth.
Looking at its own history, ONTO is currently trading more expensive than 92% of the last 5Y on P/E. This places it in the 92th percentile of its historical range, a zone where forward returns have typically been muted.
A standard DCF model does not produce reliable output for ONTO under current conditions. For unprofitable or near-breakeven companies, revenue-based multiples such as EV/Sales and historical P/S percentile are more informative than intrinsic value calculations.
Financial quality is a concern. The Piotroski F-Score of 2/9 flags weakening fundamentals that deserve closer scrutiny before the valuation case can be fully trusted.
Bottom line: ONTO appears richly valued on our framework, with a Smart Value Score of 46/100. At current levels the risk/reward is skewed against the buyer. A materially lower price or significant operational improvement would be needed to change the picture.
Frequently asked questions
Is ONTO overvalued in 2026?
Based on a Smart Value Score of 46/100, ONTO appears overvalued. Current price exceeds what fundamentals currently justify.
What is ONTO's fair value?
Standard DCF is unreliable for ONTO due to its current profitability profile. Revenue-based approaches such as EV/Sales or historical P/S percentile are more informative for this stock.
What P/E ratio does ONTO trade at?
ONTO trades at a P/E of 101.9x on trailing twelve-month earnings, compared to its 5-year median of 41.0x.
Is ONTO a buy based on valuation?
WallStSmart does not issue buy or sell recommendations. Our Smart Value Score of 46/100 reflects the combined read on growth, quality, and price. The profile skews cautious. Consider waiting for a better price or clearer operational improvement.
How does ONTO's valuation compare to its history?
On P/E, ONTO currently sits in the 92th percentile of its own 5Y range. That is historically expensive relative to where it has traded over the period.
What is ONTO's Smart Value Score?
ONTO's Smart Value Score is 46/100. The Smart Value Score is a proprietary WallStSmart metric blending growth quality, financial health, and valuation attractiveness into a single 0-100 read. Scores above 75 are rare and indicate strong multi-factor alignment.