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Summary of Significant Accounting Policies (Policies) | 12 Months Ended
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Dec. 31, 2025
Accounting Policies [Abstract] |
Financial Statement Presentation | Financial Statement Presentation The accompanying consolidated financial statements include the accounts of Rambus and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated on the accompanying consolidated financial statements. Rambus accounts for investments in entities where it owns more than 20% and has significant influence (but not control) over the investee's operations using the equity method. These investments are classified under other assets.
Use of Estimates | Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates.
Reclassifications | Reclassifications Certain prior-year balances were reclassified to conform to the current year’s presentation. None of these reclassifications had an impact on reported net income or cash flows for any of the periods presented.
Revenue Recognition | Revenue Recognition The Company recognizes revenue upon transfer of control of promised goods and services in an amount that reflects the consideration it expects to receive in exchange for those goods and services. Goods and services that are distinct are accounted for as separate performance obligations. Where an arrangement includes multiple performance obligations, the transaction price is allocated to these on a relative standalone selling price basis. The Company has established standalone selling prices for the majority of its distinct offerings - specifically, the same pricing methodology is consistently applied to all licensing arrangements; all service offerings are priced within tightly controlled bands and all contracts that include support and maintenance state a renewal rate or price that is systematically enforced. For certain contracts, the Company utilizes the residual approach to estimate standalone selling prices primarily for service offerings sold to customers at highly variable pricing. The Company’s revenue consists of product, royalties and contract and other revenue. Products primarily consist of memory interface chips sold directly and indirectly to module manufacturers and OEMs worldwide through multiple channels, including its direct sales force and distributors. Royalties revenue consists of patent and technology license royalties. Contract and other revenue consists of software license fees, engineering fees associated with integration of the Company’s technology solutions into its customers’ products and support and maintenance fees. Product Revenue Product revenue is recognized upon shipment of product to customers, net of accruals for estimated sales returns and allowances, and to distributors, net of accruals for price protection and rights of return on products unsold by the distributors. The Company transacts with direct customers primarily pursuant to standard purchase orders for delivery of products and generally allows customers to cancel or change purchase orders within limited notice periods prior to the scheduled shipment date. Royalties Revenue Rambus’ patent and technology licensing arrangements generally range between one year and ten years in duration and generally grant the licensee the right to use applicable portions of the Company’s entire IP portfolio as it evolves over time. These arrangements do not typically grant the licensee the right to terminate for convenience and where such rights exist, termination is prospective, with no refund of fees already paid or cancellation of fees already incurred by the licensee. Patent and technology licensing arrangements result in fixed payments received over time, with guaranteed minimum payments on occasion, variable payments calculated based on the licensee’s sale or use of the IP, or a mix of fixed and variable payments. • For fixed-fee arrangements (including arrangements that include minimum guaranteed amounts), the Company recognizes revenue upon control over the underlying IP use right transferring to the licensee, net of the effect of significant financing components calculated using customer-specific, risk-adjusted lending rates typically ranging between 5% and 10%, with the related interest income recognized over time on an effective rate basis. Where a licensee has the contractual right to terminate a fixed-fee arrangement for convenience without any substantive penalty payable upon such termination, the Company recognizes revenue for the duration of the contract in which the parties have present enforceable rights and obligations. • For variable arrangements, the Company recognizes revenue based on an estimate of the licensee’s sale or usage of the IP during the periods the sale or usage occur, typically quarterly, with a true-up recorded, if required, when the Company receives the actual royalty report from the licensee. • The Company recognizes license renewal revenue commencing with the start of the renewal period. Contract and Other Revenue Contract and other revenue consists of software license fees and engineering fees associated with integration of the Company’s technology solutions into its customers’ products, and support and maintenance. An initial software arrangement may consist of a term-based or perpetual license, significant software customization services and support and maintenance services that include post-implementation customer support and the right to unspecified software updates and enhancements on a when and if available basis. The Company recognizes license and customization services revenue at a point in time when final delivery is made or based on an over time model, depending on the nature and amount of customization. For the over time model, the Company recognizes revenue over time by measuring the progress toward complete satisfaction of that performance obligation. The Company recognizes support and maintenance revenue over the time those services are provided. Significant Judgments The Company applies significant judgment when determining the amount and timing of revenue from the Company’s contracts with customers, based on its estimate of the man-months necessary for completing development and customization services. The Company has adequate tools and controls in place, and substantial experience and expertise in timely and accurately tracking man-months incurred in completing customization and other professional services, and quantifying significant changes in estimates. The Company recognizes revenue on variable fee licensing arrangements on the basis of estimated sales and usage, which the Company then adjusts to actual results when it receives the final related reports from its customers. Contract Balances Timing of revenue recognition may differ from the timing of invoicing to the Company’s customers. The Company records contract assets when revenue is recognized prior to invoicing, and a contract liability when revenue is recognized subsequent to invoicing. The contract assets are transferred to receivables when the billing occurs.
Cost of Revenue | Cost of Revenue Cost of revenue includes cost of professional services, materials, including cost of wafers processed by third-party foundries, costs associated with packaging and assembly, test and shipping, cost of personnel, including stock-based compensation, and equipment associated with manufacturing support, logistics and quality assurance, warranty costs, amortization of existing technology, write-down of inventories, amortization of production mask costs, overhead and an allocated portion of occupancy costs.
Leases | Leases The Company leases office space, domestically and internationally, under operating leases. The Company’s leases have remaining lease terms generally between one year and seven years. Operating leases are included in operating lease right-of-use (“ROU”) assets, operating lease liabilities and long-term operating lease liabilities in the Company’s Consolidated Balance Sheets. The Company does not have any finance leases. The Company determines if an arrangement is a lease, or contains a lease, at inception. The Company assesses all relevant facts and circumstances in making the determination of the existence of a lease. For leases with terms greater than 12 months, the Company records the related asset and obligation at the present value of lease payments over the term. The Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments and uses the implicit rate when readily determinable. Many of the Company’s leases include rental escalation clauses, renewal options and/or termination options that are factored into the determination of lease payments when appropriate. Leases with an initial term of 12 months or less are not recorded on the balance sheet, and the Company does not separate non-lease components from lease components. Operating lease costs are included in research and development and selling, general and administrative costs in the Company’s Consolidated Statements of Income.
Goodwill | Goodwill Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in each business combination. Goodwill is not subject to amortization, but is subject to at least an annual assessment for impairment. The Company performs its impairment analysis of goodwill on an annual basis during the fourth quarter of the year unless conditions arise that warrant a more frequent evaluation. When goodwill is assessed for impairment, the Company has the option to perform an assessment of qualitative factors of impairment (optional assessment) prior to necessitating a quantitative impairment test. Should the optional assessment be used for any given year, qualitative factors to consider for a reporting unit include: cost factors; financial performance; legal, regulatory, contractual, political, business or other factors; entity specific factors; industry and market considerations; macroeconomic conditions; and other relevant events and factors affecting the reporting unit. If the Company determines in the qualitative assessment that it is more likely than not that the fair value of the reporting unit is less than its carrying value, a quantitative test is then performed. Otherwise, no further testing is required. For a reporting unit tested using a quantitative approach, the Company compares the fair value of the reporting unit with the carrying amount of the reporting unit, including goodwill. The fair value of the reporting unit is estimated using an income approach. Under the income approach, the Company measures fair value of the reporting unit based on a projected cash flow method using a discount rate determined by its management which is commensurate with the risk inherent in its current business model. The Company’s discounted cash flow projections are based on annual financial forecasts developed internally by management for use in managing its business. If the fair value of the reporting unit exceeds its carrying value, goodwill is not impaired and no further testing is required. If the fair value of the reporting unit is less than the carrying value, then the amount of goodwill impairment will be the amount by which the reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The Company performed its annual goodwill impairment analysis as of December 31, 2025 and determined that there was no impairment of its goodwill. For the years ended December 31, 2024 and 2023, the Company did no t recognize any goodwill impairment charges.
Intangible Assets | Intangible Assets Intangible assets are comprised of existing technology, customer contracts and contractual relationships, and other finite-lived and indefinite-lived intangible assets. Identifiable intangible assets resulting from the acquisitions of entities accounted for using the purchase method of accounting are estimated by management based on the fair value of assets received. Identifiable finite-lived intangible assets are amortized over the period of estimated benefit using the straight-line method, with estimated useful lives ranging from six months to ten years. Acquired indefinite-lived intangible assets related to the Company’s in-process research and development (“IPR&D”) are capitalized and subject to impairment testing until completion or abandonment of the projects. Upon successful completion of each project, the Company makes a separate determination of the useful life of the acquired indefinite-lived intangible assets and the related amortization is recorded as an expense over the estimated useful life of the specific projects. Indefinite-lived intangible assets are subject to at least an annual assessment for impairment, applying a fair-value based test. The Company first performs a qualitative assessment to determine whether it is more likely than not (more than 50% likelihood) that the indefinite-lived intangible assets are impaired. If after assessing the totality of events and circumstances and their potential effect on significant inputs to the fair value determination, the Company determines that it is more likely than not that the indefinite-lived intangible assets are impaired, then the Company performs a quantitative impairment test by comparing the fair value of the intangible assets with its carrying amount. The Company measures fair value of the indefinite-lived intangible assets under the income approach based on a projected cash flow method using a discount rate determined by its management which is commensurate with the risk inherent in its current business model. The Company’s discounted cash flow projections are based on its annual financial forecasts developed internally by management for use in managing its business. If the fair value of the indefinite-lived intangible assets exceeds its carrying value, the indefinite-lived intangible assets are not impaired and no further testing is required. If the implied fair value of the indefinite-lived intangible assets is less than the carrying value, the difference is recorded as an impairment loss.
Inventories | Inventories Inventories are stated at the lower of cost or net realizable value. Cost is computed using standard cost, which approximates actual cost, on a first-in, first-out basis. Inventories are reduced for write-downs based on periodic reviews for evidence of excess or obsolete parts. The write-down is based on comparison between inventory on hand and estimated future sales for each specific product. Once written down, inventory write-downs are not reversed until the inventory is sold or scrapped. Inventory write-downs are also established when conditions indicate that the net realizable value is less than cost due to physical deterioration, obsolescence, changes in price level or other causes.
Property and Equipment | Property and Equipment Property and equipment include computer software, computer equipment, leasehold improvements, machinery, and furniture and fixtures. Computer software, computer equipment, machinery, and furniture and fixtures are stated at cost and generally depreciated on a straight-line basis over an estimated useful life of three to seven years. Refer to Note 11, “Balance Sheet Details,” for additional information. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or the remaining terms of the leases. Upon disposal, assets and related accumulated depreciation are removed from the accounts and the related gain or loss is included in the results from operations.
Finite-Lived Asset Impairment | Finite-Lived Asset Impairment The Company evaluates finite-lived assets (including property and equipment and intangible assets) for impairment whenever events or changes in circumstances indicate the carrying value of an asset group may not be recoverable. The carrying value is not recoverable if it exceeds the undiscounted cash flows resulting from the use of the asset group and its eventual disposition. The Company’s estimates of future cash flows attributable to its asset groups require significant judgment based on its historical and anticipated results and are subject to many factors. Factors that the Company considers important which could trigger an impairment review include significant negative industry or economic trends, significant loss of clients and significant changes in the manner of its use of the acquired assets or the strategy for its overall business. When the Company determines that the carrying value of an asset group may not be recoverable based upon the existence of one or more of the above indicators of impairment, the Company measures the potential impairment based on a projected discounted cash flow method using a discount rate determined by the Company to be commensurate with the risk inherent in the Company’s current business model. An impairment loss is recognized only if the carrying amount of the asset group is not recoverable and exceeds its fair value. The impairment charge is recorded to reduce the pre-impairment carrying amount of the assets based on the relative carrying amount of those assets, though not to reduce the carrying amount of an asset below its fair value. Different assumptions and judgments could materially affect the calculation of the fair value of the assets. During 2025, 2024 and 2023, the Company did no t recognize any impairment of its finite-lived and indefinite-lived assets, except as described in Note 20, “Divestiture.”
Income Taxes | Income Taxes Income taxes are accounted for using an asset and liability approach, which requires the recognition of deferred tax assets and liabilities for expected future tax events that have been recognized differently in the Company’s consolidated financial statements and tax returns. The measurement of current and deferred tax assets and liabilities is based on provisions of the enacted tax law and the effects of future changes in tax laws or rates are not anticipated. A valuation allowance is established when necessary to reduce deferred tax assets to the amount of future tax benefit that is more likely than not to be realized. In addition, the calculation of the Company’s tax liabilities involves uncertainties in the application of complex tax regulations. As a result, the Company reports a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in its tax return. The company recognizes the benefit from a tax position only if it is more-likely-than-not that the position would be sustained upon audit based solely on the technical merits of the tax position.
Stock-Based Compensation and Equity Incentive Plans | Stock-Based Compensation and Equity Incentive Plans The Company maintains stock plans covering a broad range of equity grants including stock options, nonvested equity stock and equity stock units and performance-based instruments. In addition, the Company sponsors an Employee Stock Purchase Plan (“ESPP”), whereby eligible employees are entitled to purchase common stock semi-annually, by means of limited payroll deductions, at a 15% discount from the fair market value of the common stock as of specific dates. The Company determines compensation expense associated with restricted stock units based on the fair value of its common stock on the date of grant.
Cash and Cash Equivalents | Cash and Cash Equivalents Cash equivalents are investments with original maturity of three months or less at the date of purchase. The Company maintains its cash balances with high-quality financial institutions. Cash equivalents are invested in highly rated, liquid money market securities, time deposits and certain U.S. government sponsored obligations.
Marketable Securities | Marketable Securities Rambus invests its excess cash and cash equivalents primarily in U.S. government-sponsored obligations, corporate bonds, commercial paper and notes, time deposits and money market funds that mature within three years. Available-for-sale securities are carried at fair value, based on quoted market prices, with the unrealized gains or losses reported, net of tax, in stockholders’ equity as part of accumulated other comprehensive income (loss). The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity, both of which are included in interest and other income, net. Realized gains and losses are recorded based on the specific identification method and are included in interest and other income, net. The Company reviews its investments in marketable securities for possible other than temporary impairments on a regular basis. If any loss on investment is believed to be a credit loss, a charge will be recognized in operations. In evaluating whether a credit loss on a debt security has occurred, the Company considers the following factors: 1) the Company’s intent to sell the security, 2) if the Company intends to hold the security, whether or not it is more likely than not that the Company will be required to sell the security before recovery of the security’s amortized cost basis and 3) even if the Company intends to hold the security, whether or not the Company expects the security to recover the entire amortized cost basis. Due to the high credit quality and short-term nature of the Company’s investments, there have been no material credit losses recorded to date. The classification of funds between short-term and long-term is based on whether the securities are available for use in operations or other purposes.
Fair Value of Financial Instruments | Fair Value of Financial Instruments The fair value measurement statement defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date, and requires disclosure that establishes a framework for measuring fair value and expands disclosure about fair value measurements. The statement requires that fair value measurement be classified and disclosed in one of the following three categories: Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. The Company uses unadjusted quotes to determine fair value. The financial assets in Level 1 include money market funds. Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. The Company uses observable pricing inputs including benchmark yields, reported trades and broker/dealer quotes. The financial assets in Level 2 include U.S. government bonds and notes, and corporate bonds, commercial paper and notes. Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). When determining fair value, the Company considers the principal or most advantageous market in which the Company would transact, and the Company considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions and risk of non-performance. The Company does not have any financial assets or liabilities in Level 3 as of December 31, 2025 and 2024. Refer to Note 9, “Fair Value of Financial Instruments,” for additional information. The carrying value of cash equivalents, accounts receivable and accounts payable approximate their fair values due to their relatively short maturities as of December 31, 2025 and 2024. The Company’s financial instruments are measured and recorded at fair value, except for equity method investments and convertible notes. Marketable securities are comprised of available-for-sale securities that are reported at fair value with the related unrealized gains and losses included in accumulated other comprehensive income (loss), a component of stockholders’ equity, net of tax. Fair value of the marketable securities is determined based on quoted market prices. The Company’s non-financial assets, such as goodwill, intangible assets and property and equipment, are measured at fair value when there is an indicator of impairment and recorded at fair value only when an impairment charge is recognized. The Company’s equity method investments were initially recognized at cost, and the carrying amount was increased or decreased to recognize the Company’s share of the profit or loss of the investee after the date of acquisition. The Company’s share of the investee’s profit or loss was recognized in interest and other income (expense), net in the Company’s Consolidated Statements of Income. Distributions received from an investee reduced the carrying amount of the investment.
Research and Development | Research and Development Costs incurred in research and development, which include engineering expenses, such as salaries and related benefits, stock-based compensation, depreciation, professional services and overhead expenses related to the general development of the Company’s products, are expensed as incurred.
Computation of Earnings Per Share | Computation of Earnings Per Share Basic earnings per share is calculated by dividing the net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is calculated by dividing the earnings by the weighted-average number of common shares and potentially dilutive securities outstanding during the period. Potentially dilutive common shares consist of incremental common shares issuable upon exercise of stock options, employee stock purchases, restricted stock and restricted stock units, and shares issuable upon the conversion of convertible notes. The dilutive effect of outstanding shares is reflected in diluted earnings per share by application of the treasury stock method, or the if-converted method for the in-the-money conversion benefit feature of the 2023 Notes. This method includes consideration of the amounts to be paid by the employees, the amount of excess tax benefits that would be recognized in equity if the instrument was exercised and the amount of unrecognized stock-based compensation related to future services. No potentially dilutive common shares are included in the computation of diluted earnings per share amount when a net loss is reported.
Comprehensive Income (Loss) | Comprehensive Income (Loss) Comprehensive income (loss) is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources, including foreign currency translation adjustments and unrealized gains and losses on marketable securities. Other comprehensive income (loss), net of tax, is presented in the Consolidated Statements of Comprehensive Income.
Credit Concentration | Credit Concentration As of December 31, 2025 and 2024, the Company’s cash, cash equivalents and marketable securities were invested with various financial institutions in the form of corporate bonds, commercial paper and notes, money market funds, time deposits, U.S. Treasuries and U.S. Government Agencies. The Company’s exposure to market risk for changes in interest rates relates primarily to its investment portfolio. The Company places its investments with high-credit issuers and, by investment policy, attempts to limit the amount of credit exposure to any one issuer. As stated in the Company’s investment policy, it will ensure the safety and preservation of the Company’s invested funds by limiting default risk and market risk. The Company has certain investments denominated in foreign currencies and therefore is subject to foreign exchange risk from these assets. The Company holds cash, cash equivalents and marketable securities in excess of federally insured limits. The Company mitigates default risk by investing in high credit quality securities and by positioning its portfolio to respond appropriately to a significant reduction in a credit rating of any investment issuer or guarantor. The portfolio includes only marketable securities with active secondary or resale markets to enable portfolio liquidity. The Company’s accounts receivable are derived from revenue earned from customers located in the U.S. and internationally. Refer to Note 7, “Segments and Major Customers,” for additional information. The Company’s unbilled receivables are collected from customers located in the U.S. and internationally. Refer to Note 4, “Revenue Recognition,” for additional information.
Foreign Currency Translation and Re-Measurement | Foreign Currency Translation and Re-Measurement The Company translates the assets and liabilities of its non-U.S. dollar functional currency subsidiaries into U.S. dollars using exchange rates in effect at the end of each period. Revenue and expenses for these subsidiaries are translated using rates that approximate those in effect during the period. Gains and losses from these translations are recognized in foreign currency translation included in accumulated other comprehensive gain (loss) in the Company’s Consolidated Statements of Stockholders’ Equity. The Company’s subsidiaries that use the U.S. dollar as their functional currency re-measure monetary assets and liabilities at exchange rates in effect at the end of each period, and inventories, property and non-monetary assets and liabilities at historical rates. Additionally, foreign currency transaction gains and losses are included in interest income and other (income) expense, net, in the Company’s Consolidated Statements of Income and were not material in the periods presented.

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