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Organization and Summary of Significant Accounting Policies | 9 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Organization and Summary of Significant Accounting Policies | Organization and Summary of Significant Accounting Policies Company Overview Magnite, Inc. ("Magnite" or the "Company"), was formed in Delaware and began operations on April 20, 2007. The Company's common stock is listed on the Nasdaq Global Select Market of The Nasdaq Stock Market LLC ("Nasdaq") under the symbol "MGNI." Magnite has its principal offices in New York City, Los Angeles, Denver, London, and Sydney, and additional offices in Europe, Asia, North America, and South America. The Company provides a technology solution to automate the purchase and sale of digital advertising inventory for buyers and sellers globally, across all channels, formats and auction types. The Company's platform features applications and services for sellers of digital advertising inventory, or publishers, that own or operate websites, applications, connected television ("CTV") channels, and other digital media properties, to manage and monetize their inventory; applications and services for buyers, including advertisers, agencies, agency trading desks, and demand side platforms, to buy digital advertising inventory; and a transparent, independent marketplace that brings buyers and sellers together and facilitates intelligent decision making and automated transaction execution at scale. The Company's clients include many of the world's leading sellers and buyers of digital advertising inventory. Sellers monetize their inventory through the Company’s platform by seamlessly connecting to a global market of integrated buyers that transact through real-time bidding. These transactions include biddable auctions, where multiple buyers bid against each other in a real-time auction for the right to purchase a publisher's inventory, as well as reserve auctions, where publishers establish direct deals or private marketplaces with select buyers. At the same time, buyers leverage the Company’s platform to manage their advertising spending and reach their target audiences, simplify order management and campaign tracking, obtain actionable insights into audiences for their advertising, and access impression-level purchasing from thousands of sellers. Basis of Presentation and Summary of Significant Accounting Policies The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"), for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement of the results for the interim period presented have been included. Operating results for the three and nine months ended September 30, 2025 are not necessarily indicative of the results that may be expected for any future interim period, the year ending December 31, 2025, or for any future year. The condensed consolidated balance sheet at December 31, 2024 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto for the year ended December 31, 2024 included in its 2024 Annual Report on Form 10-K. There have been no significant changes in the Company's accounting policies from those disclosed in its audited consolidated financial statements and notes thereto for the year ended December 31, 2024 included in its Annual Report on Form 10-K. Refer to Note 6 for the useful lives of the Company's intangible assets associated with the acquisition of Streamrai, Inc. Segments Management has determined that the Company operates as one operating segment and one reportable segment. The Company’s chief operating decision maker ("CODM") is the Chief Executive Officer ("CEO"). The Company has one primary business activity, where it provides a platform to all of its customers, buyers and sellers, that automates the purchase and sale of digital advertising inventory globally, across all channels, formats, and auction types, as described above. The Company’s CODM reviews financial information on a consolidated basis, principally to make decisions about how to allocate resources and to measure the Company’s performance. The CODM reviews consolidated net income (loss), which is the measure of financial profit and loss most closely aligned with generally accepted accounting principles. The CODM considers budget-to-actual variances for this measure, predominantly in the annual budget, forecasting process, and quarterly results assessment. The CODM does not review any balance sheet information at any other level than on a consolidated basis and does not review any income statement information at any other level than on a consolidated basis with the exception of revenue by geography and by channel (refer to Note 3). The significant expense information regularly provided to the CODM is the same as that included in the face of the Company's consolidated income statement of operations. Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported and disclosed financial statements and accompanying footnotes. Actual results could differ materially from these estimates. Recent Accounting Pronouncements Not Yet Adopted In December 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2023-09, Income Taxes (Topic 740) – Improvements to Income Tax Disclosures ("ASU 2023-09") to enhance income tax information primarily through changes in the rate reconciliation and income taxes paid information. ASU 2023-09 is effective for annual periods beginning after December 15, 2024 on a prospective basis. Early adoption and retrospective application are permitted. The Company will adopt the guidance for the fiscal year ending December 31, 2025 on a prospective basis. The Company expects the impact of adoption of this guidance to be limited to footnote disclosure and to result in additional disaggregation of information disclosed in the rate reconciliation and with respect to income taxes paid. 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"). ASU 2024-03 requires additional disclosures of the nature of expenses included in the income statement and presented in the footnotes. ASU 2024-03 is effective for annual periods beginning after December 15, 2026 and for interim periods beginning after December 15, 2027 on a prospective basis. Early adoption and retrospective application are permitted. The Company is currently evaluating the impact of adopting ASU 2024-03 on its disclosures. In July 2025, the FASB issued 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 to measure credit losses on current accounts receivable and current contract assets. The practical expedient allows companies to assume that current conditions as of the balance sheet date do not change for the remaining life of the asset when measuring credit losses. ASU 2025-05 is effective for annual periods beginning after December 15, 2025 and for interim periods within those annual reporting periods on a prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2025-05 on its financial statements and disclosures. 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 modernizes and simplifies the recognition and disclosure framework for internal-use software costs by changing from a project-stage approach to a more judgment-based approach. ASU 2025-06 is effective for annual periods beginning after December 15, 2027 and for interim periods within those annual reporting periods on a prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2025-06 on its financial statements and disclosures. The Company does not believe there are any other recently issued and effective or not yet effective pronouncements that would have or are expected to have a material impact on the Company’s present or future condensed consolidated financial statements.

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- Definition The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Accounting policies describe all significant accounting policies of the reporting entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-1 + Details
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