CALIX, INC

Our financial statements are prepared in accordance with U.S. GAAP. These accounting principles require us to make certain estimates and judgments that can affect the reported amounts of assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenue and expenses during the periods presented. Management bases its estimates, assumptions and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances. To the extent there are material differences between these estimates and actual results, our financial statements may be affected. Our management evaluates its estimates, assumptions and judgments on an ongoing basis.

Our critical accounting policies and estimates, which are revenue recognition and inventory valuation and supplier purchase commitments, are described under “Critical Accounting Policies and Estimates” in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in our Annual Report on Form 10-K for the year ended December 31, 2024. For the six months ended June 28, 2025, there have been no significant changes in our critical accounting policies and estimates.

Recent Accounting Pronouncements

There have been no additional accounting pronouncements or changes in accounting pronouncements during the six months ended June 28, 2025 as compared with the recent accounting pronouncements described in our Annual Report on Form 10-K for the year ended December 31, 2024 that are significant or expected to be significant to us.