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Summary of Significant Accounting Policies | 12 Months Ended
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Dec. 31, 2025
Accounting Policies [Abstract] |
Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Basis of Presentation and Principles of Consolidation Our consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP). Any reference in these notes to applicable guidance is meant to refer to the authoritative accounting principles generally accepted in the United States as found in the Accounting Standards Codification (ASC) and Accounting Standards Updates (ASU) of the Financial Accounting Standards Board (FASB). The consolidated financial statements include the Company and its subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Use of Estimates We have made estimates and judgments affecting the amounts reported in our consolidated financial statements and the accompanying notes. We base our estimates on historical experience and various relevant assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods that are not readily apparent from other sources. Changes in our estimates are recorded in the financial results of the period in which the new information becomes available. The actual results that we experience may differ materially from our estimates. Segment Information The Company operates as a single operating and reportable segment, reflecting the integrated nature of our business focused on the research, development, and commercialization of mRNA-based medicines. Our Chief Executive Officer serves as the Chief Operating Decision Maker (CODM), responsible for assessing the Company's performance and making resource allocation decisions. The CODM evaluates financial information on a consolidated basis, focusing on key metrics such as total revenue, operating expenses, and net income or loss, which is our reported measure of segment profit or loss. The CODM allocates resources based on the Company's available cash resources, forecasted cash flow, and expenditures on a consolidated basis, as well as an assessment of the probability of success of its research and development activities. Resource allocation decisions are informed by budgeted and forecasted expense information, along with actual expenses incurred to date. Disaggregated profit or loss information at the program or functional level is not regularly provided to or relied upon by the CODM, as our integrated operating model emphasizes shared resources and centralized decision-making. The interdependent nature of our research, development, and commercialization activities, supported by common infrastructure such as our mRNA platform, makes further disaggregation of expenses less meaningful for assessing performance. Additionally, there are no segment managers accountable for operations, operating results, and planning for levels or components below the consolidated unit level. Revenue Recognition To determine the appropriate amount of revenue to be recognized for arrangements that we determine are within the scope of ASC 606, we perform the following five steps (the five-step model): (i) identify the contract(s) with our customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when or as each performance obligation is satisfied. Net Product Sales We sell our COVID and RSV vaccines to the commercial market as well as to foreign governments and international organizations. In the U.S., our COVID vaccine and RSV vaccine are sold primarily to wholesalers and distributors, and to a lesser extent, directly to retailers and healthcare providers. We recognize net product sales when control of the product transfers to the customer, typically upon delivery. Payment terms generally range from 30 to 60 days, in line with customary practices in each country. Net product sales are recognized net of estimated wholesaler chargebacks, invoice discounts for prompt payments and pre-orders, provisions for sales returns, government rebates, and other related deductions. These provisions are recorded based on contractual terms, our estimate of returns for product sold during the period, and other relevant considerations, using the expected value method or the most likely amount method. We update our estimates quarterly and record necessary adjustments in the period when we identify the adjustments. Product sales, net of provisions, are recorded only to the extent a significant reversal in the amount of cumulative revenue recognized is not probable when the uncertainty associated with the provisions is subsequently resolved. Shipping and handling activities are considered fulfillment activities and not a separate performance obligation. Taxes assessed by governmental authorities that are imposed on and collected from our product sales are excluded from net product sales. Wholesaler chargebacks, discounts and fees We contract with retailers, healthcare providers, and group purchasing organizations (GPO) to broaden our customer reach and offer contractual discounts. The chargeback represents the difference between the invoice price billed to the wholesaler and the negotiated price charged to the retailers, healthcare providers and GPO members. For distribution and related services, such as stocking and cold chain storage, we provide compensation to our wholesalers and distributors. We typically offer our customers invoice discounts on product sales for prompt payments and pre-orders. The estimation of these discounts and fees is based on contractual terms and our expectations regarding future customer payment behaviors. Wholesaler fees and invoice discounts are deducted from our gross product sales and accounts receivable at the time such product sales are recognized. Product returns We typically offer customers in the U.S. the right to return products, up to a certain limit as stipulated in our contracts. Estimated returns for our vaccines are determined considering available return rates for similar products, estimated levels of inventory in the distribution channel, projected market demand, and our historical experience with returns. The estimated amount for product returns is presented within accrued liabilities on our consolidated balance sheets and is deducted from our gross product sales in the period the related product sales are recognized. Government rebates and other fees Fees payable to third party payers and healthcare providers, along with fees to our direct customers that are settled via cash payments, including certain patient assistance programs, are recorded as accrued liabilities on our consolidated balance sheets. In 2024, we began recognizing Medicare rebates associated with our RSV product. The estimation of Medicare rebates requires judgment and is based on historical utilization trends, and the mix of customers and payers. The estimated liability for unpaid or unbilled rebates is presented as accrued liabilities on our consolidated balance sheets. For 2024 and 2025, the product sales subject to Medicare rebates were immaterial. Determining the amount of variable consideration to recognize necessitates substantial judgment, especially when assessing factors outside our direct control, such as the limited historical data, constrained third-party information, and evolving market dynamics. Among all variables, estimating returns continues to present the most significant judgment due to the broad range of potential outcomes and the lack of established return trends. While we now have two years of data on our product returns, this remains limited and subject to significant variability given current market conditions. We will continue to refine our projections as additional information becomes available. The actual results could differ from our estimates, and such differences could have a material impact to our financial statements. Other Revenue Other revenue consists primarily of grant revenue, collaboration revenue, licensing and royalty revenue, and stand-ready manufacturing revenue. Grant revenue We have contracts with government-sponsored and private organizations for research and development related activities that provide for payments for reimbursed costs, which may include overhead and general and administrative costs as well as a related profit margin. We recognize grant revenue from these contracts as we perform services under these arrangements when the funding is committed. Associated expenses are recognized when incurred as research and development expense. Grant revenue and related expenses are presented gross in the consolidated statements of operations as we have determined we are the primary obligor under the arrangements relative to the research and development services we perform as lead technical expert. Collaboration Revenue We have entered into strategic collaborations and other similar arrangements with third parties for research and other licenses, development and commercialization of certain products and product candidates. Such arrangements provide for various types of payments to us, including upfront fees, funding of research and development services and preclinical and clinical material, technical, development, regulatory, and commercial milestone payments, licensing fees, option exercise fees, and royalty and earnout payments on product sales. Such payments are often not commensurate with the timing of revenue recognition and therefore result in deferral of revenue recognition. We recognize revenue based on the amount of the transaction price that is allocated to each respective performance obligation when or as the performance obligation is satisfied by transferring a promised good or service to the customer. Licensing and Royalty Revenue License revenue is recognized when the license is granted to the licensee, provided no significant performance obligations remain. Royalty revenue is recognized based on sales by licensees when the underlying sales occur, in accordance with the terms of the licensing agreement and when collectibility is reasonably assured. Stand-Ready Manufacturing Revenue We have entered into long-term strategic agreements with government entities to establish domestic mRNA manufacturing capabilities and support pandemic readiness. Under these agreements, we are required to build and maintain manufacturing facilities and to supply vaccines in accordance with minimum spend commitments or annual demand forecasts established by the respective governments. A portion of the total consideration under each agreement is allocated to a stand-ready obligation to maintain manufacturing readiness and is recognized as other revenue on a straight-line basis over the contractual period. The remaining consideration is related to our obligation to supply vaccines and will be recognized as product sales when control of the vaccines transfers upon delivery. Cash and Cash Equivalents We consider all highly liquid investments with an original maturity of 90 days or less from the date of purchase to be cash equivalents. Cash, Cash Equivalents and Restricted Cash shown in the Consolidated Statements of Cash Flows The following table provides a reconciliation of cash, cash equivalents and restricted cash in the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in millions):
|  | December 31,
|  | 2025 |  | 2024 |  | 2023
Cash and cash equivalents |  | $ | 2,595 |  |  | $ | 1,927 |  |  | $ | 2,907 |
Restricted cash(1) |  | 1 |  |  | 1 |  |  | 17 |
Restricted cash, non-current(2) |  | 1 |  |  | 1 |  |  | 4 |
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows |  | $ | 2,597 |  |  | $ | 1,929 |  |  | $ | 2,928 |
_______ (1)Included in prepaid expenses and other current assets in the consolidated balance sheets. (2)Included in other non-current assets in the consolidated balance sheets. Investments We invest our excess cash balances in marketable debt securities. We classify our investments in marketable debt securities as available-for-sale. We report our available-for-sale securities at fair value at each balance sheet date, and include any unrealized holding gains and losses (the adjustment to fair value) in accumulated other comprehensive income (loss), a component of stockholders’ equity. Realized gains and losses are determined using the specific-identification method, and are included in other income (expense), net in our consolidated statements of operations. We classify our available-for-sale securities as current or non-current based on each instrument’s underlying effective maturity date and for which we have the intent and ability to hold the investment for a period of greater than 12 months. Available-for-sale securities with maturities of less than 12 months are classified as current and are included in investments in the consolidated balance sheets. Available-for-sale securities with maturities greater than 12 months for which we have the intent and ability to hold the investment for greater than 12 months are classified as non-current and are included in investments, non-current in the consolidated balance sheets. We evaluate securities for impairment at the end of each reporting period. Impairment is evaluated considering numerous factors, and their relative significance varies depending on the situation. Factors considered include whether a decline in fair value below the amortized cost basis is due to credit-related factors or non-credit-related factors, the financial condition and near-term prospects of the issuer, and our intent and ability to hold the investment to allow for an anticipated recovery in fair value. A credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings. Any impairment that is not credit- related is recognized in other comprehensive income (loss), net of applicable taxes. Investments in publicly traded equity securities with readily determinable fair values are recorded at quoted market prices for identical securities, with changes in fair value recorded in other income (expense), net, in our consolidated statements of operations. Investments in equity securities without readily determinable fair values are recorded at cost minus impairment, if any, adjusted for changes resulting from observable price changes in orderly transactions for identical or similar securities. Such adjustments are recorded in other income (expense), net, in our consolidated statements of operations. Accounts Receivable, net Accounts receivable, net represent amounts due from customers less wholesalers chargebacks, discounts and fees (see our “Revenue Recognition” policy within Note 2 for product sales provision) and allowance for expected credit losses. Amounts payable to us are recorded as accounts receivable when our right to consideration is unconditional. To estimate the allowance for credit losses, we determine the allowance based on ongoing credit evaluation, historical experience and the aging of such receivables, among other factors. The allowance for doubtful accounts was immaterial at December 31, 2025 and 2024. Additionally, bad debt expenses were immaterial for the years ended December 31, 2025, 2024 and 2023. Concentrations of Credit Risk Financial instruments that subject us to significant concentrations of credit risk consist primarily of cash, cash equivalents, marketable debt securities, and accounts receivable, net. Our investment portfolio comprises money market funds and marketable debt securities, including U.S. Treasury securities, debt securities of U.S. government agencies and corporate entities and commercial paper. Our cash management and investment policy limits investment instruments to investment-grade securities with the objective to preserve capital and to maintain liquidity until the funds can be used in business operations. We invest in a variety of financial instruments and limit the amount of credit exposure with any individual financial institution. We are also subject to credit risk from our accounts receivable, net related to our net product sales and other revenue. We sell our products primarily to wholesalers and distributors and other governments and organizations. We do not require collateral or other security to support accounts receivable. To date, we have not experienced material losses with respect to the collection of our accounts receivable. Significant Customers Our accounts receivable, net are generally unsecured and are from customers in different countries. We generated revenue from product sales to wholesalers and distributors and other governments and organizations, and to a lesser extent, stand-ready manufacturing revenue from international government entities, grants made by government-sponsored and private organizations, and collaboration revenue from our strategic alliances. A significant portion of our revenue to date has been generated from the following entities that accounted for more than 10% of total revenue and accounts receivable for the periods presented:
| Percentage of Revenue Years Ended December 31, |  | Percentage of Accounts Receivable December 31, |  |
| 2025 |  | 2024 |  | 2023 |  | 2025 |  | 2024 |  |
FFF Enterprises | 15 | % |  | 13 | % |  | * |  | * |  | * |  |
Public Works and Government Services Canada | 13 | % |  | * |  | * |  | 33 | % |  | * |  |
Cardinal Health | 11 | % |  | * |  | * |  | * |  | * |  |
United Kingdom Health Security Agency | * |  | 16 | % |  | * |  | * |  | 65 | % |  |
Mexico Medistik | * |  | * |  | * |  | 29 | % |  | * |  |
Boryung Biopharma Korea | * |  | * |  | * |  | 17 | % |  | * |  |
Taiwan Food and Drug Administration | * |  | * |  | * |  | * |  | 10 | % |  |
Ministry of Health, Labor, and Welfare of Japan | * |  | * |  | 21 | % |  | * |  | * |  |
________ * - Represents an amount of less than 10% Fair Value Measurements Fair value is defined 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. When determining the fair value measurements for assets and liabilities, which are required to be recorded at fair value, we consider the principal or most advantageous market in which we would transact and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as risks inherent in valuation techniques, transfer restrictions and credit risk. ASC 820 (Fair Value Measurement) establishes a fair value hierarchy for instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and our assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from our independent sources. Unobservable inputs are inputs that reflect our assumptions about the inputs that market participants would use in pricing the asset or liability, and are developed based on the best information available in the circumstances. The following fair value hierarchy is used to classify assets and liabilities based on the observable inputs and unobservable inputs used to value the assets and liabilities: •Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; •Level 2: Quoted prices for similar assets and liabilities in active markets, 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; or •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). To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Our cash equivalents and marketable debt securities are reported at fair value determined using Level 1 and Level 2 inputs (Note 6). The fair value of our foreign currency forward contracts is calculated using Level 2 inputs, which include currency spot rates, forward rates, interest rate curve and credit or non-performance risk. Inventory Inventory is recorded at the lower of cost or net realizable value, with cost determined principally using first-in, first-out method. We periodically review the composition of inventory in order to identify excess, obsolete, slow-moving or otherwise unsaleable items. If unsaleable items are observed and there are no alternate uses for the inventory, we will record a write-down to net realizable value in the period that the decline in value is first recognized through a charge to cost of sales. The determination of whether inventory costs will be realizable requires estimates by management. If actual market conditions are less favorable than projected by management, additional write-downs of inventory may be required. We also assess whether we have any excess firm, non-cancelable, purchase commitment liabilities, resulting from our supply agreements with third-party vendors. The determination of net realizable value and firm purchase commitment liabilities requires judgment, including consideration of many factors, such as estimates of future product demand, product net selling prices, current and future market conditions, potential product obsolescence, expiration and utilization of raw materials under firm purchase commitments and contractual minimums, among others. We hold raw materials beyond our one year forecasted production plan, which were classified as non-current and included in other non-current assets in our consolidated balance sheets. Pre-launch Inventory Costs relating to raw materials and production of inventory in preparation for product launch prior to regulatory approval are capitalized when future commercialization is considered probable, the future economic benefit is expected to be realized, and we believe that material uncertainties related to the ultimate regulatory approval have been significantly reduced. For pre-launch inventory that is capitalized, we consider a number of factors based on the information available at the time, including the product candidate’s current status in the drug development and regulatory approval process, results from the related clinical trials, results from meetings with relevant regulatory agencies prior to the filing of regulatory applications, potential impediments to the approval process such as product safety or efficacy, historical experience, viability of commercialization and market trends. As of December 31, 2025 and 2024, we did not have any capitalized pre-launch inventory on our consolidated balance sheets. Property, Plant and Equipment Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives of property, plant and equipment are described below:
|  | Estimated Useful Life
Land and permanent land improvements |  | Not depreciated
Limited-life land improvements |  | Determined on a project-by-project basis
Buildings and building improvements |  | Up to 40 years
Manufacturing and laboratory equipment |  | 5-12 years
Leasehold improvements |  | Lesser of estimated useful life of improvement or remaining life of related lease
Computer equipment and software |  | 3 to 5 years
Furniture, fixtures and other |  | 5 years
Right-of-use asset, financing |  | Lease term
Construction in progress includes direct costs related to the construction of various property, plant and equipment, and is stated at original cost. Once the asset is placed into service, these capitalized costs will be allocated to certain property, plant and equipment categories and will be depreciated over the estimated useful life of the underlying assets. Goodwill and Intangible Assets Goodwill represents the excess of purchase price over the fair value of net assets acquired and is carried at cost. Goodwill is tested at least annually for impairment by assessing qualitative factors in determining whether it is more likely than not that the fair value of net assets is below their carrying amounts. To date, an impairment of goodwill has not been recorded. Finite-lived intangible assets primarily consist of acquired intellectual property and regulatory approval and commercial sales milestone payments. These assets are recorded at cost, net of accumulated amortization, and amortized on a straight-line basis over their estimated useful lives. Impairment of Long-Lived Assets, including Intangibles and Lease Right-of-Use Assets We evaluate our long-lived assets, which consist of property, plant and equipment, finite-lived intangibles and right-of-use assets to determine if facts and circumstances indicate that the carrying amount of assets may not be recoverable. If such facts and circumstances exist, we assess the recoverability of the long-lived assets by comparing the projected future undiscounted net cash flows associated with the related asset or group of assets over their remaining lives against their respective carrying amounts. If such review indicates that such cash flows are not expected to be sufficient to recover the recorded value of the assets, the assets are written down to their estimated fair values based on the expected discounted future cash flows attributable to the assets or based on appraisals. Impairment expenses for the years ended December 31, 2025, 2024 and 2023 were immaterial. Leases Leases are classified at their commencement date, which is defined as the date on which the lessor makes the underlying asset available for use by the lessee, as either operating or finance leases based on the economic substance of the agreement. We recognize lease right-of-use assets and related liabilities in our consolidated balance sheets for both operating and finance leases. Lease liabilities are measured at the lease commencement date as the present value of the future lease payments using the interest rate implicit in the lease. If the rate implicit is not readily determinable, we will utilize our incremental borrowing rate as of the lease commencement date. Lease right-of-use assets are initially measured as the lease liability plus direct costs and prepaid lease payments less lease incentives. The lease term is the non-cancelable period of the lease and includes options to extend or terminate the lease when it is reasonably certain that an option will be exercised. We recognize operating lease cost in operating expenses in our consolidated statements of operations, inclusive of rent escalation provisions and rent holidays, on a straight-line basis over the respective lease term. For our finance leases, we recognize depreciation expense associated with the leased asset acquired and recognize interest expense related to the portion of the financing in our consolidated statements of operations. We do not separate non-lease components from lease components for all classes of underlying assets. We do not recognize right-of-use assets and lease liabilities for leases with a lease term of 12 months or less. Instead, these lease payments are recognized in the statements of operations on a straight-line basis over the lease term. Collaboration Arrangements We analyze our collaboration arrangements to assess whether they are within the scope of ASC 808 (Collaborative Arrangements) to determine whether such arrangements involve joint operating activities performed by parties that are both active participants in the activities and exposed to significant risks and rewards that are dependent on the commercial success of such activities. To the extent the arrangement is within the scope of ASC 808, we assess whether aspects of the arrangement between us and our collaborator are within the scope of other accounting literature. If we conclude that some or all aspects of the arrangement represent a transaction with a customer, we account for those aspects of the arrangement within the scope of ASC 606 (Revenue from Contracts with Customers). See our "Revenue Recognition" policy within Note 2 for additional discussion of revenue recognition under these types of arrangements. If we conclude that some or all aspects of the arrangement are within the scope of ASC 808 and do not represent a transaction with a customer, we recognize our allocation of the shared costs incurred with respect to the jointly conducted activities as a component of the related expense in the period incurred. Additionally, for any payments related to capital expenditures that are partially reimbursed by a collaborator, to the extent the underlying capital costs qualify for capitalization, any reimbursements received will offset the capitalized cost of the asset. Research and Development Funding Arrangements We have entered into research and development funding arrangements to support a targeted programs, under which a third party has committed to fund us up to a specified amount. Contingent upon the regulatory approval of the program, we are obligated to pay certain milestones and royalties as outlined in the respective agreements. We account for funding received under research and development arrangements as a reduction to expenses when substantive financial risk is transferred to the funding party. These arrangements are accounted for as an obligation to conduct research and development activities. The funding is recognized proportionally as the related costs are incurred, using an input method. Contingent payments, such as milestones or royalties, will be recognized separately upon achievement of the related conditions. Research and Development Costs Research and development costs are expensed as incurred. Research and development expenses consist of costs incurred in performing research and development activities, including salaries and benefits, facilities costs, overhead costs, contract services, and other outside costs. The value of goods and services received from contract research organizations and contract manufacturing organizations in the reporting period are estimated based on the level of services performed, and progress in the period in cases when we have not received an invoice from the supplier. Research and development costs also include costs and shared cost associated with third-party collaboration arrangements, including upfront fees and milestones paid to third-parties in connection with technologies that had not reached technological feasibility and did not have an alternative future use. Assets that are acquired or constructed for research and development activities and that have alternative future uses, in research and development projects or otherwise, are capitalized and depreciated over their useful lives. However, the costs of equipment or facilities that are acquired or constructed and intangibles that are purchased from others for a particular research and development project, and that have no alternative future uses and therefore no separate economic values, are considered research and development costs and expensed when incurred. Advertising Costs Costs associated with advertising are expensed as incurred and are included in selling, general and administrative expense in the consolidated statements of operations. Advertising expenses were $133 million in 2025, $146 million in 2024, and $204 million in 2023. Stock-Based Compensation We issue stock-based awards to employees and non-employees, generally in the form of stock options, restricted stock units (RSUs), and performance stock units (PSUs). We account for our stock-based compensation awards in accordance with ASC 718 (Compensation—Stock Compensation). Most of our stock-based awards have been made to employees. We measure compensation cost for equity awards at their grant-date fair value and recognize compensation expense over the requisite service period, which is generally the vesting period, on a straight-line basis. The grant date fair value of stock options is estimated using the Black-Scholes option pricing model, which requires management to make assumptions with respect to the fair value of our common stock on the grant date, including the expected term of the award, the expected volatility of our stock, calculated based on a period of time generally commensurate with the expected term of the award, risk-free interest rates and expected dividend yields of our stock. Prior to 2025, we estimated the expected term of our stock options using the simplified method, whereby, the expected term equals the average of the vesting term and the original contractual term of the option. During 2025, we used historical exercise data in estimating the expected term of stock options, utilizing a methodology that combines historical settlement data with a hypothetical settlement pattern for outstanding options, based on estimated time to arrival at-the-money and adjusted for employee departure rates. The change in methodology used during 2025 did not have a material impact on stock-based compensation and our financial statements. However, during the fourth quarter of 2025, in connection with our stock option exchange program (see Note 13), which resulted in changes to our stock option population, we determined that we no longer have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term, as such data is no longer indicative of future exercise patterns. Accordingly, beginning in 2026, we will estimate the expected term of stock options using the simplified method. We will continue to apply this process until a sufficient amount of historical information regarding the expected term becomes available and we believe that historical experience is relevant to our expectations for current grants. The expected volatility is based on our stock price volatility and incorporates both historical volatility of our stock price and implied volatility derived from the price of exchange traded options on our stock. The grant date fair value of RSUs is estimated based on the fair value of our underlying common stock. For performance-based stock awards, we recognize stock-based compensation expense over the requisite service period using the accelerated attribution method when achievement is probable. We classify stock-based compensation expense in our consolidated statements of operations in the same manner in which the award recipient’s salary and related costs are classified or in which the award recipient’s service payments are classified. We made an accounting policy election to recognize forfeitures of stock-based awards as they occur. Income Taxes We account for income taxes based on an asset and liability approach. We recognize deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the financial reporting and tax bases of assets and liabilities. These differences are measured using the enacted statutory tax rates and laws that will be in effect when the differences are expected to reverse. Valuation allowances are provided when the expected realization of deferred tax assets does not meet a “more likely than not” criterion. We periodically reassess the need for valuation allowances on our deferred tax assets, considering both positive and negative evidence to evaluate whether it is more likely than not that all or a portion of such assets will not be realized. We make estimates and judgments about our future taxable income that are based on assumptions that are consistent with our plans and estimates. Should the actual amounts differ from our estimates, the amount of our valuation allowance could be materially impacted. Changes in these estimates may result in significant increases or decreases to our tax provision in a period in which such estimates are changed, which in turn would affect net income or loss. We recognize tax benefits from uncertain tax positions if we believe the position is more likely than not to be sustained on examination by the taxing authorities based on the technical merits of the position. We make adjustments to these tax reserves when facts and circumstances change, such as the closing of a tax audit or the refinement of an estimate. The provision for income taxes includes the effects of any reserves for uncertain tax positions, as well as the related net interest and penalties. Earnings (Loss) per Share We calculate diluted net earnings (loss) per share attributable to common stockholders by dividing net earnings (loss) by the weighted average number of common shares outstanding after giving consideration to the dilutive effect of restricted stock units, performance stock units, stock options, and shares under the employee stock purchase plan that are outstanding during the period. For periods in which we have generated a net loss, the basic and diluted net loss per share attributable to common stockholders are the same, as the inclusion of the potentially dilutive securities would be anti-dilutive. Comprehensive Income (Loss) Comprehensive income (loss) includes net income (loss) and other comprehensive income (loss) for the period. Other comprehensive income (loss) consists of unrealized gains and losses on our investments, derivatives designated as hedging instruments, and foreign currency translation, as well as, pension and postretirement obligation adjustments. Total comprehensive income (loss) for all periods presented has been disclosed in the consolidated statements of comprehensive income (loss). The components of accumulated other comprehensive loss for the years ended December 31, 2025 and 2024 were as follows (in millions):
| Unrealized Gains on Available-for-Sale Securities |  |  |  | Pension and Postretirement Obligation Adjustments |  | Losses (gains) on Foreign Currency Translation |  | Total
Accumulated other comprehensive loss, balance at December 31, 2023 | $ | (114) |  |  |  |  | $ | (9) |  |  | $ | — |  |  | $ | (123) |
Other comprehensive income | 124 |  |  |  |  | (3) |  |  | (8) |  |  | 113 |
Accumulated other comprehensive loss, balance at December 31, 2024 | 10 |  |  |  |  | (12) |  |  | (8) |  |  | (10) |
Other comprehensive income | 28 |  |  |  |  | 16 |  |  | 11 |  |  | 55 |
Accumulated other comprehensive income, balance at December 31, 2025 | $ | 38 |  |  |  |  | $ | 4 |  |  | $ | 3 |  |  | $ | 45 |
Share Repurchases Shares of our common stock repurchased pursuant to our repurchase programs are retired. The purchase price of such repurchased shares of common stock is recorded as a reduction to additional paid-in-capital. If the balance in additional paid-in-capital is exhausted, the excess is recorded as a reduction to retained earnings. Recently Issued Accounting Standards From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies and adopted by us as of the specified effective date. Except as noted below, we believe that the impact of recently issued standards that are not yet effective will not have a material impact on our consolidated financial statements and disclosures. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU requires disaggregated information about a reporting entity’s effective tax rate reconciliation as well as additional information on income taxes paid. The standard requires entities to disclose federal, state, and foreign income taxes in their rate reconciliation tables and elaborate on reconciling items that exceed a quantitative threshold. Additionally, it requires an annual disclosure of income taxes paid, net of refunds, categorized by jurisdiction based on a quantitative threshold. The ASU is effective on a prospective basis for annual periods beginning after December 15, 2024, and early adoption is permitted. We adopted this ASU prospectively in the fourth quarter of 2025, and the required disclosures are included in Note 14, Income Taxes. 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. This ASU requires entities to disclose, on an annual and interim basis, disaggregated information in the footnotes related to certain expense categories included in income statement line items. Specifically, entities are expected to provide tabular disclosures for prescribed categories such as inventory purchases, employee compensation, depreciation, and intangible asset amortization for each relevant expense caption. The standard also requires disclosure of total selling expenses and a definition of those expenses in annual filings. Any remaining amounts not quantitatively disclosed are expected to be described qualitatively. This ASU is effective for fiscal years beginning after December 15, 2026 and interim periods beginning after December 15, 2027. Early adoption permitted, and the standard may be applied on a prospective or retrospective basis. We are currently assessing the impact that this new accounting standard will have on our consolidated financial statement disclosures. In September 2025, the FASB issued ASU No. 2025-06, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software. This ASU makes targeted amendments to the accounting for and disclosure of software costs under ASC 350-40. The amendments modernize the guidance to reflect current software development practices, including nonlinear development approaches, and remove references to “development stages.” Under the ASU, the following two criteria must be met for entities to begin capitalizing software costs: (1) management, with the relevant authority, implicitly or explicitly authorizes and commits to funding a computer software project, and (2) it is probable that the project will be completed and the software will be used to perform the function intended (referred to as the “probable-to-complete recognition threshold”). The ASU clarifies that this threshold would not be met when there is “significant uncertainty associated with the development activities of the software (referred to as ‘significant development uncertainty’).” The ASU is effective for all entities for annual reporting periods beginning after December 15, 2027, and for interim reporting periods within those fiscal years. Early adoption is permitted, and entities may apply the amendments prospectively, retrospectively, or using a modified prospective transition approach. We are currently evaluating the impact that this new accounting standard will have on our consolidated financial statements and disclosures. In September 2025, the FASB issued ASU No. 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration From a Customer in a Revenue Contract. This ASU expands the scope exceptions in the derivatives guidance to exclude certain non-exchange-traded contracts with underlyings based on the operations or activities of one of the parties to the contract, including the occurrence or nonoccurrence of an event specific to those operations or activities. The ASU also clarifies that share-based noncash consideration received from a customer in exchange for goods or services should be accounted for as noncash consideration under ASC 606 unless and until the entity’s right to receive or retain such consideration becomes unconditional. The ASU is effective for annual reporting periods beginning after December 15, 2026, including interim periods within those annual reporting periods. Early adoption is permitted. We are currently evaluating the impact that adoption of this new accounting standard will have on our consolidated financial statements and disclosures. In December 2025, the FASB issued ASU No. 2025-10, Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities. This ASU establishes guidance on the recognition, measurement, presentation, and disclosure of government grants received by business entities. The guidance defines a government grant as a transfer of a monetary asset or a tangible nonmonetary asset from a government to a business entity other than in an exchange transaction and excludes transactions within the scope of other U.S. GAAP. Under the ASU, government grants are classified as either grants related to an asset or grants related to income, and recognition is permitted only when it is probable that the entity will comply with the conditions attached to the grant and that the grant will be received. The ASU permits alternative presentation approaches depending on the nature of the grant and requires disclosures regarding the nature of the grant, affected financial statement line items, and significant terms and conditions. The ASU is effective for public business entities for annual reporting periods beginning after December 15, 2028, including interim periods within those annual reporting periods. Early adoption is permitted, and the standard may be applied on a modified prospective, modified retrospective, or full retrospective basis. We are currently evaluating the impact of this new accounting standard and do not expect its adoption to have a material impact on our consolidated financial statements and disclosures.

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