Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2026

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Preparation—The unaudited condensed consolidated financial statements of Fortinet, Inc. and its subsidiaries (collectively, “we,” “us” or “our”) have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information, as well as the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements, and should be read in conjunction with our audited consolidated financial statements as of and for the year ended December 31, 2025, contained in our Annual Report on Form 10-K filed with the SEC on February 25, 2026. In the opinion of management, all adjustments, which include normal recurring adjustments, considered necessary for a fair presentation, have been included. The results of operations for the three months ended March 31, 2026 are not necessarily indicative of the results to be expected for the full year or for any future periods. The condensed consolidated balance sheet as of December 31, 2025 is derived from the audited consolidated financial statements for the year ended December 31, 2025.

The condensed consolidated financial statements include the accounts of Fortinet, Inc. and its subsidiaries. As of March 31, 2026, the functional currency of our foreign subsidiaries is the U.S. dollar. Effective January 1, 2026, the Company transitioned the functional currency of one of its subsidiaries to the U.S. dollar following its full operational integration. We consolidate all legal entities in which we have an absolute controlling financial interest. All intercompany balances and transactions have been eliminated in consolidation.

The preparation of the condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates.

There have been no material changes to our significant accounting policies as of and for the three months ended March 31, 2026, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the SEC.

Recent Adopted Accounting Standards

Credit Losses

In July 2025, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2025-05—Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets (“ASU 2025-05”), which provides a practical expedient for estimating expected credit losses for current accounts receivable and current contract assets that arise from transactions accounted for under Revenue from Contracts with Customers (Topic 606). The amendments are effective for our annual reporting periods beginning with fiscal year 2026 and interim reporting periods within those annual reporting periods on a prospective basis, with early adoption permitted. We adopted ASU 2025-05 on January 1, 2026 and the adoption of this standard did not have a material impact on our condensed consolidated financial statements.

Recent Accounting Standards Not Yet Effective

Expense Disaggregation Disclosures

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (“ASU 2024-03”), and in January 2025, the FASB issued ASU No. 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date, which clarified the effective date of ASU 2024-03. ASU 2024-03 enhances the disclosures required for expense disaggregation in our annual and interim consolidated financial statements. The amendments are effective for our annual reporting periods beginning fiscal year 2027 and our interim reporting periods beginning in fiscal year 2028, with early adoption permitted, and can be applied prospectively or retrospectively. We are currently evaluating the ASU to determine its impact on our disclosures.

Internal-Use Software

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 (“ASU 2025-06”), which amends the cost capitalization criteria for internal-use software development costs by removing all references to prescriptive and sequential software project development stages and providing new guidance on how to evaluate whether the probable-to-complete recognition threshold has been met. The amendments are effective for our annual periods beginning fiscal year 2028 and interim reporting periods within those annual reporting periods and can be applied prospectively, retrospectively, or via a modified prospective transition method, with early adoption permitted. We are currently assessing adoption timing and the method of adoption.