SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The condensed consolidated financial statements, which include the accounts of Roku and its wholly-owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, filed with the SEC on February 13, 2026 (the “Annual Report”).
Use of Estimates	Use of Estimates The preparation of the Company’s condensed consolidated financial statements in accordance with U.S. GAAP requires management to make certain estimates, judgments, and assumptions that affect the reported amounts of assets, liabilities, net revenue, and expenses. Significant items subject to such estimates and assumptions include: •revenue recognition: determining the nature and timing of satisfaction of performance obligations, variable consideration, determining the stand-alone selling prices of performance obligations, and evaluation of customer versus vendor relationships; •the impairment of long-lived assets; •inventory reserves; •valuation of consideration transferred, assets acquired, and liabilities assumed in connection with business combinations (see Note 4); •valuation of strategic investments (see Note 9); •useful lives of tangible and intangible assets; •allowances for sales returns and sales incentives; and •the valuation of deferred income tax assets. The Company bases its estimates on historical experience and on various other assumptions that the Company believes to be reasonable under the circumstances. Actual results may differ from the Company’s estimates and assumptions.
Inventories	Inventories The Company’s inventories consist primarily of finished goods and are stated at the lower of cost or net realizable value with cost determined on a first-in, first-out basis. Provisions are made if the cost of the inventories exceeds their net realizable value. The Company evaluates inventory levels for excess and obsolete products, based on its assessment of future demand and market conditions. The Company recognized inventory provisions charged to the Cost of revenue, devices, of $20.7 million and $6.8 million for the three months ended March 31, 2026 and 2025, respectively. As of March 31, 2026 and December 31, 2025, the ending inventory reserve was $28.2 million and $29.3 million, respectively.
Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements	Recently Adopted Accounting Pronouncements In July 2025, the Financial Accounting Standards Board ("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 introduces a practical expedient for the application of the current expected credit loss model to current accounts receivable and contract assets. The Company adopted this guidance prospectively effective January 1, 2026 and elected the practical expedient provided by ASU 2025-05. In accordance with this practical expedient, for current accounts receivable and contract assets, the Company assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. The adoption did not have a material impact on the Company’s consolidated financial statements. Recent Accounting Pronouncements 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 simplifies the capitalization guidance by removing all references to software development project stages so that the guidance is neutral to different software development methods. The guidance is effective for fiscal years beginning after December 15, 2027 and interim periods within those fiscal years on a retrospective, modified, or prospective basis. The Company is currently in the process of evaluating the effects of the new guidance. 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, which requires additional disclosures of specific expense categories in the notes to the financial statements on an annual and interim basis. The guidance is effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027 on a retrospective or prospective basis. The Company is currently in the process of evaluating the effects of the new guidance.
Fair Value Disclosure	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal market (or most advantageous market, in the absence of a principal market) for the asset or liability in an orderly transaction between market participants at the measurement date. Further, the Company maximizes the use of observable inputs and minimizes the use of unobservable inputs in measuring fair value, and utilizes a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. The three levels of inputs used to measure fair value are as follows: Level 1—Quoted prices in active markets for identical assets or liabilities. Financial assets and liabilities measured using Level 1 inputs include cash, cash equivalents, restricted cash, accounts receivable, prepaid expenses, accounts payable, and accrued liabilities. Level 2—Observable inputs other than quoted prices included within Level 1, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; and inputs other than quoted prices that are observable or are derived principally from, or corroborated by, observable market data by correlation or other means. Financial assets measured using Level 2 inputs include time deposits as of March 31, 2026 and December 31, 2025. Level 3—Unobservable inputs that are supported by little or no market activity, are significant to the fair value of the assets or liabilities and reflect the Company’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The Company measured its strategic investment in convertible promissory notes using Level 3 inputs. The fair value of the strategic investment in convertible promissory notes on the date of purchase was determined to be equal to its principal amount. The Company recorded an unrealized loss of $6.3 million in Other income, net related to the change in the fair value of the strategic investment in convertible promissory notes for the three months ended March 31, 2025. The Company classified the strategic investment in convertible promissory notes as Level 3 due to the lack of relevant observable market data over fair value inputs. The fair value of the strategic investment in convertible promissory notes was estimated using a scenario-based probability weighted discounted cash flow model. Significant assumptions include the discount rate, and the timing and probability weighting of the various redemption scenarios that impact the settlement of the strategic investment in convertible promissory notes. The contingent consideration is related to the Company’s acquisition of Frndly TV in May 2025 (refer to Note 4). As of the Acquisition Date, the Company measured its contingent consideration using Level 3 inputs. The fair value of the contingent consideration on the Acquisition Date was determined to be $65.8 million. The contingent consideration is subsequently remeasured to fair value at each reporting date until the contingency is resolved, with any changes in fair value included in General and administrative expenses in the condensed consolidated statements of operations. The Company recorded an expense of $1.7 million in General and administrative expenses related to the change in the fair value of the contingent consideration during the three months ended March 31, 2026. The Company classified the contingent consideration as Level 3 due to the lack of relevant observable market data over fair value inputs. The fair value of the contingent consideration was estimated using a probability weighted discounted cash flow model. Significant assumptions include the probability of achieving certain performance metrics and milestones and the discount rate. The estimated fair value is based upon assumptions believed to be reasonable but which are uncertain and involve significant judgment by management. Favorable or unfavorable changes in expectations of achieving the performance metrics and milestones would result in corresponding increases or decreases in the fair value measurement, while increases or decreases in discount rates would have inverse impacts on the fair value measurement. Assets and liabilities that are measured at fair value on a non-recurring basis Non-financial assets such as goodwill, intangible assets, property and equipment, operating lease right-of-use assets, and content assets are evaluated for impairment and adjusted to fair value using Level 3 inputs, only when impairment is recognized. The Company measured the intangible assets acquired from the Frndly TV acquisition at fair value using Level 3 inputs. The fair value of the customer relationships has been estimated using the multi-period-excess-earnings method. The key valuation assumptions include the Company’s estimates of customer attrition rates, expected future revenue, profit margins, and discount rate. The fair value of the tradename has been estimated using the relief-from-royalty method. The key valuation assumptions include the Company’s estimates of expected future revenue, royalty rate, and discount rate.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2026

Basis of Presentation and Principles of Consolidation

The condensed consolidated financial statements, which include the accounts of Roku and its wholly-owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, filed with the SEC on February 13, 2026 (the “Annual Report”).

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements in accordance with U.S. GAAP requires management to make certain estimates, judgments, and assumptions that affect the reported amounts of assets, liabilities, net revenue, and expenses. Significant items subject to such estimates and assumptions include:

•revenue recognition: determining the nature and timing of satisfaction of performance obligations, variable consideration, determining the stand-alone selling prices of performance obligations, and evaluation of customer versus vendor relationships;

•the impairment of long-lived assets;

•inventory reserves;

•valuation of consideration transferred, assets acquired, and liabilities assumed in connection with business combinations (see Note 4);

•valuation of strategic investments (see Note 9);

•useful lives of tangible and intangible assets;

•allowances for sales returns and sales incentives; and

•the valuation of deferred income tax assets.

The Company bases its estimates on historical experience and on various other assumptions that the Company believes to be reasonable under the circumstances. Actual results may differ from the Company’s estimates and assumptions.

Inventories

The Company’s inventories consist primarily of finished goods and are stated at the lower of cost or net realizable value with cost determined on a first-in, first-out basis. Provisions are made if the cost of the inventories exceeds their net realizable value. The Company evaluates inventory levels for excess and obsolete products, based on its assessment of future demand and market conditions. The Company recognized inventory provisions charged to the Cost of revenue, devices, of $20.7 million and $6.8 million for the three months ended March 31, 2026 and 2025, respectively. As of March 31, 2026 and December 31, 2025, the ending inventory reserve was $28.2 million and $29.3 million, respectively.

Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In July 2025, the Financial Accounting Standards Board ("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 introduces a practical expedient for the application of the current expected credit loss model to current accounts receivable and contract assets. The Company adopted this guidance prospectively effective January 1, 2026 and elected the practical expedient provided by ASU 2025-05. In accordance with this practical expedient, for current accounts receivable and contract assets, the Company assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. The adoption did not have a material impact on the Company’s consolidated financial statements.

Recent Accounting Pronouncements

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 simplifies the capitalization guidance by removing all references to software development project stages so that the guidance is neutral to different software development methods. The guidance is effective for fiscal years beginning after December 15, 2027 and interim periods within those fiscal years on a retrospective, modified, or prospective basis. The Company is currently in the process of evaluating the effects of the new guidance.

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, which requires additional disclosures of specific expense categories in the notes to the financial statements on an annual and interim basis. The guidance is effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027 on a retrospective or prospective basis. The Company is currently in the process of evaluating the effects of the new guidance.

Fair Value Disclosure

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal market (or most advantageous market, in the absence of a principal market) for the asset or liability in an orderly transaction between market participants at the measurement date. Further, the Company maximizes the use of observable inputs and minimizes the use of unobservable inputs in measuring fair value, and utilizes a three-level fair value hierarchy that prioritizes the inputs used to measure fair value.

The three levels of inputs used to measure fair value are as follows:

Level 1—Quoted prices in active markets for identical assets or liabilities. Financial assets and liabilities measured using Level 1 inputs include cash, cash equivalents, restricted cash, accounts receivable, prepaid expenses, accounts payable, and accrued liabilities.

Level 2—Observable inputs other than quoted prices included within Level 1, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; and inputs other than quoted prices that are observable or are derived principally from, or corroborated by,

observable market data by correlation or other means. Financial assets measured using Level 2 inputs include time deposits as of March 31, 2026 and December 31, 2025.

Level 3—Unobservable inputs that are supported by little or no market activity, are significant to the fair value of the assets or liabilities and reflect the Company’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances.

The Company measured its strategic investment in convertible promissory notes using Level 3 inputs. The fair value of the strategic investment in convertible promissory notes on the date of purchase was determined to be equal to its principal amount. The Company recorded an unrealized loss of $6.3 million in Other income, net related to the change in the fair value of the strategic investment in convertible promissory notes for the three months ended March 31, 2025.

The Company classified the strategic investment in convertible promissory notes as Level 3 due to the lack of relevant observable market data over fair value inputs. The fair value of the strategic investment in convertible promissory notes was estimated using a scenario-based probability weighted discounted cash flow model. Significant assumptions include the discount rate, and the timing and probability weighting of the various redemption scenarios that impact the settlement of the strategic investment in convertible promissory notes.

The contingent consideration is related to the Company’s acquisition of Frndly TV in May 2025 (refer to Note 4). As of the Acquisition Date, the Company measured its contingent consideration using Level 3 inputs. The fair value of the contingent consideration on the Acquisition Date was determined to be $65.8 million. The contingent consideration is subsequently remeasured to fair value at each reporting date until the contingency is resolved, with any changes in fair value included in General and administrative expenses in the condensed consolidated statements of operations. The Company recorded an expense of $1.7 million in General and administrative expenses related to the change in the fair value of the contingent consideration during the three months ended March 31, 2026.

The Company classified the contingent consideration as Level 3 due to the lack of relevant observable market data over fair value inputs. The fair value of the contingent consideration was estimated using a probability weighted discounted cash flow model. Significant assumptions include the probability of achieving certain performance metrics and milestones and the discount rate. The estimated fair value is based upon assumptions believed to be reasonable but which are uncertain and involve significant judgment by management. Favorable or unfavorable changes in expectations of achieving the performance metrics and milestones would result in corresponding increases or decreases in the fair value measurement, while increases or decreases in discount rates would have inverse impacts on the fair value measurement.

Assets and liabilities that are measured at fair value on a non-recurring basis

Non-financial assets such as goodwill, intangible assets, property and equipment, operating lease right-of-use assets, and content assets are evaluated for impairment and adjusted to fair value using Level 3 inputs, only when impairment is recognized.

The Company measured the intangible assets acquired from the Frndly TV acquisition at fair value using Level 3 inputs. The fair value of the customer relationships has been estimated using the multi-period-excess-earnings method. The key valuation assumptions include the Company’s estimates of customer attrition rates, expected future revenue, profit margins, and discount rate. The fair value of the tradename has been estimated using the relief-from-royalty method. The key valuation assumptions include the Company’s estimates of expected future revenue, royalty rate, and discount rate.