ONTO · CIK 704532
What Onto Innovation Inc. told the SEC could break it.
Onto Innovation's disclosures concentrate on a narrow customer base and exposure to U.S.-China trade policy. Its three largest semiconductor customers each accounted for more than 10% of fiscal 2025 revenue — 20%, 15%, and 14%, roughly half the total — so losing or having any one push out orders would materially hit results. Trade policy compounds that: expanding U.S. export controls on semiconductor technology to China have already hurt its ability to win domestic Chinese business, and reciprocal tariffs have softened demand and prompted order cancellations, while a significant share of its suppliers are the sole or single source for certain components.
4 self-disclosed vulnerabilities, pulled from its own filings, each in the company’s words, with the source. This is the risk register almost nobody reads.
In its own words
What could break it.
Regulatory & policy
- U.S. export controls on semiconductor technology to Chinahigh
Expanding U.S. Department of Commerce export controls on semiconductor and high-technology exports to China (including Huawei and entity-list restrictions, 2022-2025) have negatively impacted Onto's ability to compete for domestic Chinese customers and adversely affected its results of operations.
“export control regulations and policies have negatively impacted our ability to compete for the business of domestic customers in China, which has adversely affected our results of operations.”
SEC filing →As of 2026 - reciprocal tariffs harming product demandmedium
Reciprocal tariffs imposed by other countries in response to U.S. trade policy have harmed demand for Onto's products in those regions and caused customers to push out or cancel previously placed purchase orders.
“Reciprocal tariffs imposed by other countries have harmed and may continue to harm demand for our products from customers in those regions, or may cause our customers in those regions to push out or cancel previously placed purchase orders.”
Customer concentration
- top three (unnamed) customers each >10% of revenue (A 20%, B 15%, C 14%)high
Onto's revenue is concentrated in a few semiconductor customers — Customer A was 20%, Customer B 15% and Customer C 14% of revenue in fiscal 2025 (top three ~49%) — so the loss or order push-out of any one would materially affect results.
“Year Ended Customer January 3, 2026 December 28, 2024 December 30, 2023 Customer A 20 % 23 % 14 % Customer B 15 % 17 % 19 % Customer C 14 % 12 % ^”
SEC filing →As of 2026
Sole-source dependency
- sole/single-source suppliers for components and subassembliesmedium
A significant number of Onto's suppliers are the sole or single source for certain components or subassemblies, and it lacks long-term contracts with some suppliers, exposing it to supply shortages, price increases, late deliveries and quality issues.
“A significant number of our suppliers are the sole source or single source for certain components or subassemblies.”
SEC filing →As of 2026
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