Onto Innovation Inc. (ONTO) Stock Price & How to Invest

Onto Innovation designs and builds inspection, metrology, lithography, and data-analysis systems that semiconductor manufacturers use to measure and check chips during production. It was formed from the 2019 merger of Rudolph Technologies and Nanometrics, and it competes in areas like thin-film and critical-dimension (OCD) metrology, macro defect inspection, and advanced packaging inspection. Its tools, including the Dragonfly inspection platform and the Atlas and newer G-series metrology systems, are used across advanced logic nodes, specialty devices, and the packaging steps that stitch AI accelerators and high-bandwidth memory (HBM) together.

The investment picture centers on Onto's leverage to two of the fastest-growing corners of chipmaking: advanced packaging (2.5D/3D logic and HBM) and leading-edge logic at gate-all-around nodes. Revenue was roughly $1.0 billion in 2025, and management has guided 2026 revenue above $1.3 billion (over 30% growth), with advanced packaging expected to grow more than 50%. That growth potential comes with the cyclicality, customer concentration, and lumpy order patterns typical of semiconductor capital equipment, so results can swing quarter to quarter even when the multi-year trend is up.

Onto is a semiconductor capital-equipment company, so its revenue is cyclical and can drop sharply in a chip-spending downturn. A large share of sales concentrates in a handful of leading-edge logic and memory customers, so a single customer's capex delay or push-out can move a quarter meaningfully. Its growth thesis leans heavily on AI-driven advanced packaging and HBM demand continuing, which could soften if AI infrastructure spending cools or memory pricing weakens. Gross margin has fluctuated with product mix (it dipped year over year in early 2026 before guided recovery), and export controls on chip equipment sold into China add regulatory uncertainty. Larger, better-capitalized rivals like KLA can also pressure pricing and share.

10 analysts publish price targets on ONTO, averaging $369.60 against a $258.58 price as of August 2026, or +42.9%. The published targets run from $330.00 to $450.00, a moderate spread, and the ratings split 10 buy, 0 hold, 0 sell. Over the last six months there have been 10 raises and 0 cuts among the published actions. A price target is what an analyst published on a date, not a prediction, and sell-side ratings skew positive across the whole market.

Read the full ONTO forecast and price target for the target table, the recent rating actions by firm, and how the consensus has shifted.

We give no verdict on Onto Innovation Inc.. Both cases are real, which is why the question is contested at all, so here is the strongest version of each.

The case for buying. Advanced packaging and HBM. Onto's inspection and metrology tools sit in the packaging steps that assemble AI accelerators and stack high-bandwidth memory. The most optimistic published target, $450.00, assumes this works close to its best case.

The case against. Onto is a semiconductor capital-equipment company, so its revenue is cyclical and can drop sharply in a chip-spending downturn. The most pessimistic target, $330.00, is roughly what ONTO is worth if this bites instead.

Read the full bull and bear case on ONTO, including what would have to change to break either one. Walnut is not an investment adviser.

A simple financial snapshot. These are approximations and refresh quarterly; for current figures see Onto Innovation Inc.'s investor relations page or your broker.

• Revenue (TTM): ~$1.03 billion
• FY2025 revenue: ~$1.005 billion
• Q1 2026 revenue: ~$292 million (record, ~+9.5% YoY)
• Q1 2026 non-GAAP EPS: ~$1.42
• FY2026 revenue guidance: ~$1.3 billion+ (>30% growth)
• Market cap: ~$12.3 billion
• P/E (approx): ~20-25x

Onto trades at a mid-cap valuation that reflects its growth exposure to AI packaging rather than a deep-value multiple. Gross margin has run in the roughly 50-56% range depending on mix, and management guided second-quarter 2026 revenue to $320-$330 million with non-GAAP EPS of about $1.65-$1.73. These figures are as of May 2026 and will change with each quarterly report.

If you want ONTO exposure as part of a larger bundle rather than directly, these ETFs hold it meaningfully. Weights are approximate and refresh quarterly.

Other names that sit close to ONTO: same theme, named as a direct competitor, or held beside it in the same funds. Each entry says which. Worth a look if you are thinking about diversification within a thesis rather than concentration on one ticker.

There are three common ways to get ONTO exposure. Buy shares (or fractional shares) directly at any major broker. Hold an ETF that includes it (DFAS), which spreads the position across many companies. Or build it into a focused thematic portfolio, so ONTO sits alongside other stocks that express the same thesis.

Walnut takes the portfolio route. Describe a thesis where ONTO fits (for example “AI infrastructure” or “dividend-growth large-caps”) and the AI proposes 5 to 6 constituents with target weights. You review the plan and fund it through your own broker when you're ready.

New to this? Start with how to invest in stocks, see how to analyze a stock with AI, or compare the best AI stock analyzers.

ONTO is a specialized semi-cap toolmaker whose story now rides heavily on advanced packaging and HBM demand tied to the AI buildout.

Whether ONTO is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, what would have to go right, and the risks in is ONTO a buy or a sell?, and where the stock could go from here in the ONTO stock forecast.

For income investors, whether ONTO pays a dividend and how the payout looks is covered in does ONTO pay a dividend? And to weigh ONTO against a peer, read the full side-by-side comparisons: ONTO vs KLAC and ONTO vs NVMI.