ONTO INNOVATION INC. New Standards Disclosure

Recent Accounting Pronouncements.

Recently Adopted or Effective

In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which requires public entities to disclose consistent categories and greater disaggregation of information in the rate reconciliation and for income taxes paid. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2024, with early adoption permitted. The Company applied the amendments prospectively for the fiscal year ended January 3, 2026, and the impact of the adoption of the amendments in this update was not material to the Company’s consolidated financial position and results of operations for the fiscal year ended January 3, 2026, since the amendments require only enhancement of existing income tax disclosures in the footnotes to the Company’s consolidated financial statements.

Updates Not Yet Effective

In December 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270): Narrow-Scope Improvements,” to clarify and reorganize U.S. GAAP interim reporting guidance to improve navigability, applicability, and consistency without changing the fundamental nature or volume of required interim disclosures. This amendment clarifies when ASC 270 is applicable, establishes a disclosure principle requiring disclosure of material events or changes occurring since the most recent annual reporting period, and consolidates into ASC Topic 270 a comprehensive list of interim disclosures required by other Codification Topics. The amendment also clarifies the form and content of interim financial statements, including guidance for condensed interim reporting. The amendment is effective for the Company for interim periods in 2028, with early adoption permitted. The impact of the adoption of the amendments in this update is not expected to be material to the Company’s consolidated financial position and results of operations.

In December 2025, the FASB issued ASU 2025‑10, “Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities,” to establish specific guidance for the recognition, measurement, presentation, and disclosure of government grants received to reduce diversity and increase consistency amongst business entities in accounting for such grants. This amendment amends Accounting Standards Codification “ASC” Topic 832 to require that a government grant received by a business entity should not be recognized as income until it is probable that a business entity will comply with the conditions attached to the grant and the grant will be received, with any grant related to an asset to be purchased, constructed or acquired such as long-lived assets or inventory to be recognized on the balance sheet as either deferred income

or as an adjustment to the cost basis of the related asset, or the cost accumulation approach, as such costs are incurred. Any grant income or deferred income shall be recognized in earnings on a systematic and rational basis over the periods in which a business entity recognizes as expenses the costs for which the grant is intended to compensate, whereas any grants accounted for using the cost accumulation approach will not have a direct subsequent recognition in earnings, but rather reduced depreciation or amortization in accounting for the related asset. Entities are also required to present grants recognized in earnings separately under other income or deducted from the related expense, and provide disclosures of the nature of the government grant received, the accounting policies used to account for the grant, and the significant terms and conditions of the grant. The amendment is effective for the Company for annual and interim periods in 2029, with early adoption and multiple transition methods permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements.

In December 2025, the FASB issued ASU 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements,” to amend certain aspects of its hedge accounting guidance to better reflect an entity’s risk management activities in the financial statements. The guidance expands the hedged risks permitted to be aggregated in a group of individual forecasted transactions and increases the variable price components eligible to be designated as the hedged risk in the forecasted purchase or sale of nonfinancial assets. For public business entities, the provisions of ASU 2025-09 are effective for fiscal years beginning after December 15, 2026. Early adoption is permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements.

In September 2025, the FASB issued ASU 2025-06, “Intangibles-Goodwill and Other-Internal Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software,” which removes all references to software development stages and clarifies the threshold entities apply to begin capitalizing costs. ASU 2025-06 is effective for annual periods beginning after December 15, 2027 and interim reporting periods within those annual reporting periods. The ASU may be applied prospectively, retrospectively or through a modified transition approach with early adoption permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements.

In July 2025, the FASB issued ASU 2025-05, “Financial Instruments - Credit Losses (Topic 326),” which simplifies the estimation of credit losses on current accounts receivable and current contract assets arising from transactions accounted for under Accounting Standards Codification 606, Revenue from Contracts with Customers. The guidance allows all entities to use a practical expedient to assume that the current conditions as of the balance sheet date will remain unchanged for the remaining life of the asset when developing a reasonable and supportable forecast as part of estimating expected credit losses on these assets. The guidance is effective for fiscal years beginning after December 15, 2025, and interim periods within those fiscal years. Early adoption is permitted. Entities that elect the practical expedient are required to apply the amendments prospectively. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements.

In November 2024, the FASB issued ASU 2024-03, “Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40),” which requires additional disclosure of certain costs and expenses, including inventory purchases, employee compensation, selling expense and depreciation expense within the notes to financial statements. The guidance is effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact that the updated standard will have on its financial statements and related disclosures.