ALLURION TECHNOLOGIES, INC.

NOTES TO THE CONSOLID ATED FINANCIAL STATEMENTS

(dollars in thousands, except per share amounts)

1. Organization and Basis of Presentation

Organization

Allurion Technologies, Inc. (“Allurion” or the “Company”) is a vertically integrated medical device company that is developing, manufacturing, and commercializing innovative weight loss experiences centered around its Allurion™ Smart Capsule. The Allurion Smart Capsule is the world’s first and only swallowable, Procedureless™ intragastric balloon for weight loss that does not require surgery, endoscopy, or anesthesia for placement. Allurion sells the Allurion Smart Capsule and connected scale through distributors or directly to health care providers.

The Company also offers tiered access to artificial intelligence ("AI")-powered remote patient monitoring tools, a mobile app for patients and a clinic dashboard for providers, referred to as the Allurion Virtual Care Suite (“VCS”) and, collectively with the Allurion Smart Capsule, referred to as the “Allurion Program”. The base tier of the VCS is free of charge to those purchasing the Allurion Smart Capsule, as well as customers looking for a weight-loss management platform for patients utilizing other weight loss treatments, including anti-obesity medications and bariatric surgery. More full-scale versions of the VCS are available to health care providers on an upgrade basis. Allurion currently markets the Allurion Program in over 50 countries, and the Company operates subsidiaries in the United States, France, the United Arab Emirates, the United Kingdom, Italy, Spain, Australia and Mexico.

Business Combination Agreement

On February 9, 2023, Allurion Technologies Opco, Inc. (formerly Allurion Technologies, Inc., “Legacy Allurion”) and Allurion Technologies, Inc. (formerly Allurion Technologies Holdings, Inc.) entered into the Business Combination Agreement (as subsequently amended on May 2, 2023, the “Business Combination Agreement”) with Compute Health Acquisition Corp. (“CPUH” or "Compute Health"), Compute Health Corp. (“Merger Sub I”) and Compute Health LLC (“Merger Sub II” and, together with Merger Sub I, the “Merger Subs”). Pursuant to the Business Combination Agreement, on August 1, 2023 (the “Closing Date”), the Mergers (as defined below) were consummated in three steps: (a) Compute Health merged with and into Allurion (the “CPUH Merger”), with Allurion surviving the CPUH Merger as a publicly listed entity (the time at which the CPUH Merger became effective, the “CPUH Merger Effective Time”) and becoming the sole owner of the Merger Subs; (b) three hours following the consummation of the CPUH Merger, Merger Sub I merged with and into Legacy Allurion (the “Intermediate Merger” and the time at which the Intermediate Merger became effective, the “Intermediate Merger Effective Time”), with Legacy Allurion surviving the Intermediate Merger and becoming a direct, wholly-owned subsidiary of Allurion; and (c) thereafter, Legacy Allurion merged with and into Merger Sub II (the “Final Merger” and, collectively with the CPUH Merger and the Intermediate Merger, the “Mergers”, and together with all other transactions contemplated by the Business Combination Agreement, the “Business Combination”), with Merger Sub II surviving the Final Merger and remaining a direct, wholly-owned subsidiary of Allurion (the time at which the Final Merger became effective, the “Final Merger Effective Time”). Shares of Allurion's Common Stock (defined below) began trading on the New York Stock Exchange ("NYSE") under the ticker symbol “ALUR” on August 2, 2023. Upon completion of the Business Combination, Legacy Allurion's business operations continued as our business operations.

The Business Combination was accounted for as a reverse capitalization in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Under this method of accounting, Compute Health was treated as the “acquired” company for financial reporting purposes and Legacy Allurion was the accounting “acquirer”. Accordingly, the Business Combination was treated as the equivalent of Legacy Allurion issuing stock for the net assets of Compute Health, accompanied by a recapitalization. As a result of the reverse recapitalization, the assets and liabilities of the Company are presented at their historical carrying values, and the assets and liabilities of Compute Health are recognized on the acquisition date and measured on the basis of the net proceeds from the capital transaction, with no goodwill or other intangible assets recorded. This determination is primarily based on the fact that, immediately following the Business Combination, Legacy Allurion stockholders had a majority of the voting power of Allurion, Legacy Allurion controlled the majority of the board seats of Allurion, and Legacy Allurion senior management comprised all of the senior management of Allurion. The equity structure has been restated in all comparative periods up to the Closing Date to reflect the number of shares of the Company's common stock, $0.0001 par value per share ("Common Stock," “Allurion Common Stock” or the “Company’s Common Stock”), issued to Legacy Allurion stockholders in connection with the Business Combination. As such, the shares and corresponding capital amounts and earnings per share related to Legacy Allurion's convertible preferred stock and Legacy Allurion common stock prior to the Business Combination have been retroactively restated as shares reflecting the exchange ratio of approximately 0.9780 (the "Exchange Ratio") established in the Business Combination. The Exchange Ratio established in the Business Combination is prior to the Reverse Stock Split (as defined below) and did not change as a result of the Reverse Stock Split. As a result of this retrospective application, certain prior period balances within the consolidated financial statements have changed.

Unless otherwise indicated, references in this Annual Report on Form 10-K to the "Company", "our", and "Allurion" refer to the consolidated operations of Allurion Technologies, Inc. and its subsidiaries. References to "CPUH" and "Compute Health" refer to Compute Health Acquisition Corp. and its subsidiaries prior to the consummation of the Business Combination and references to "Legacy Allurion" refer to Allurion Technologies, Inc. prior to the consummation of the Business Combination.

Basis of Presentation

The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) and the rules and regulations of the Securities and Exchange Commission (“SEC”). Any reference in these notes to the applicable accounting guidance is meant to refer to the authoritative U.S. GAAP as found in the Accounting Standards Codification ("ASC"), and Accounting Standards Update ("ASU"), of the Financial Accounting Standards Board ("FASB").

The consolidated financial statements include Allurion; and its consolidated subsidiaries, Allurion France SAS, and Allurion Middle East, LLC, which were both incorporated in 2017; Allurion UK Ltd., which was incorporated in 2021; Allurion Italy, Srl, Allurion Spain Srl, Allurion Australia Pty Ltd. and Allurion Mexico S. de R.L de C.V, which were incorporated in 2022; and Allurion Technologies, LLC, which was incorporated in 2023. The Company’s operations are located in Europe, the Middle East, Africa, Latin America, Canada and the Asia-Pacific region, and it operates in one business segment.

Our foreign operations are subject to exchange rate fluctuations and foreign currency transaction costs. The functional currency for all of our foreign subsidiaries is the United States dollar except Allurion Australia Pty Ltd., which uses the Australian dollar. When remeasuring from a local currency to the functional currency, assets and liabilities are remeasured into U.S. dollars at exchange rates in effect at the balance sheet dates and results of operations transacted in local currency are remeasured into U.S. dollars using average exchange rates for the period presented. Gains (losses) from remeasurement of $0.9 million and ($0.7) million for the years ended December 31, 2025 and 2024, respectively, are recorded in the statements of operations and comprehensive loss within other expense, net. The Company translates the foreign functional currency financial statements to U.S. dollars for Allurion Australia Pty Ltd. using the exchange rates at the balance sheet date for assets and liabilities, the period average exchange rates for revenues and expenses, and the historical exchange rates for equity transactions. The effects of foreign currency translation adjustments were immaterial for the years ended December 31, 2025 and 2024.

Reverse Stock Split

On December 23, 2024, following the Annual Meeting, the Board approved a reverse stock split of the Common Stock at a ratio of 1-for-25 (the “Reverse Stock Split”). Effective as of 12:01 a.m. Eastern Time on January 3, 2025, the Company filed an amendment (the “Certificate of Amendment”) to its Amended and Restated Certificate of Incorporation, as amended and/or restated from time to time, to effectuate the Reverse Stock Split.

As a result of the Reverse Stock Split, every 25 shares of the Company’s Common Stock issued or outstanding were automatically reclassified into one validly issued, fully-paid and non-assessable new share of Common Stock, subject to the treatment of fractional shares as described below, without any action on the part of the holders. Trading of the Common Stock on the NYSE commenced on a split-adjusted basis at market open on January 3, 2025, under the existing trading symbol “ALUR.”

No fractional shares were issued in connection with the Reverse Stock Split. Stockholders who would otherwise be entitled to receive fractional shares as a result of the Reverse Stock Split were automatically entitled to receive an additional fraction of a share of Common Stock to round up to the next whole share.

Proportional adjustments were also made to the number of shares of Common Stock awarded and available for issuance under the Company’s equity incentive plans, as well as the exercise price and the number of shares issuable upon the exercise or conversion of the Company’s outstanding stock options, restricted stock units and other equity securities under the Company’s equity incentive plans. Additionally, all outstanding convertible notes were adjusted in accordance with their terms, which will, among other changes to the convertible note terms, result in proportionate adjustments being made to the number of shares issuable upon exercise of such convertible notes and to the exercise and redemption prices of such convertible notes. All outstanding warrants were also adjusted in accordance with their terms, which will, among other changes to the warrant terms, result in proportionate adjustments being made to the number of shares issuable upon exercise of such warrants and to the exercise and redemption prices of such warrants. Specifically, following the effectiveness of the reverse stock split, every twenty five (25) shares of Common Stock that may be purchased pursuant to the exercise of public warrants will represent one (1) share of Common Stock that may be purchased pursuant to such warrants. Accordingly, for the Company’s warrants trading under the symbol “ALUR WS” on the NYSE, each whole public warrant will be exercisable for 0.056818 shares of common stock at an exercise price of $202.50 per share of Common Stock, which is based on each public warrant being exercisable for 1.420455 shares of common stock before thereverse stock split, adjusted for the 25:1 reverse stock split ratio.

Unless otherwise indicated, all authorized, issued, and outstanding shares and per share amounts contained in the accompanying consolidated financial statements have been adjusted to reflect the 1-for-25 Reverse Stock Split for all periods presented. As a result, net loss per share was also retrospectively adjusted for periods ended prior to the Reverse Stock Split. Proportionate adjustments for the Reverse Stock Split were also made to the exercise prices and number of shares issuable under the Company's equity incentive plans, and the number of shares underlying outstanding equity awards, as applicable.

Going Concern

The accompanying consolidated financial statements have been prepared as though the Company will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company has evaluated whether there are certain conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the consolidated financial statements are issued.

The Company (1) has incurred recurring losses from operations and cash outflows from operating activities since inception, (2) anticipates net losses and negative operating cash flows for the foreseeable future, (3) needs to raise additional capital to satisfy its current obligations and finance its future operations and (4) is not in compliance with certain financial covenants required under its credit facilities. Through December 31, 2025, the Company has funded its operations primarily with proceeds from the sale of its Common Stock, convertible preferred stock, issuance of convertible notes, issuance of term loans, and funds received upon consummation of the Business Combination.

Until such time as we can generate sufficient revenue to fund operations, we expect to use proceeds from the issuance of equity, debt financings, or other capital transactions to fund our operations and satisfy our liquidity requirements. Additionally, the Company has entered into an Exchange Agreement with RTW, as disclosed in Note 11, Capital Stock and Stockholder's Deficit, under which the Company's existing credit facilities will be exchanged for preferred stock upon the satisfaction of certain closing conditions. Because the amount and timing of such financings are uncertain, the Company has concluded that management’s plans do not alleviate substantial doubt about its ability to continue as a going concern for a reasonable period of time.

The accompanying consolidated financial statements are prepared in accordance with generally accepted accounting principles applicable to a going concern, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business, and do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty.

2. Summary of Significant Accounting Policies

Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP 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 consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. Management considers many factors in selecting appropriate financial accounting policies and controls in developing the estimates and assumptions that are used in the preparation of these consolidated financial statements. Management must apply significant judgment in this process. In addition, other factors may affect estimates, including expected business and operational changes, sensitivity and volatility associated with the assumptions used in developing estimates, and whether historical trends are expected to be representative of future trends. The estimation process often may yield a range of reasonable estimates of the ultimate future outcomes, and management must select an amount that falls within that range of reasonable estimates. Actual results could differ from those estimates.

Risk of Concentration of Credit, Significant Customers and Significant Suppliers

Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash equivalents and accounts receivable, net. The Company maintains deposits in accredited financial institutions in excess of federally insured limits. The Company maintains its cash, cash equivalents and restricted cash with financial institutions that management believes to be of high credit quality. The Company has not experienced any losses on such accounts and does not believe it is exposed to any unusual credit risk beyond the normal credit risk associated with commercial banking relationships.

Significant customers are those which represent more than 10% of the Company’s total revenue for the years ended December 31, 2025 and 2024 or accounts receivable, net balance as of December 31, 2025 and 2024. The following table presents customers that represent 10% or more of the Company’s total revenue and accounts receivable, net:

The Company relies on third parties for the supply of parts and components for its products as well as third-party logistics providers. In instances where these parties fail to perform their obligations, the Company may be unable to find alternative suppliers of parts and components to satisfactorily deliver its products to its customers on time, if at all, which could have a material adverse effect on the Company’s operating results, financial condition and cash flows and damage its customer relationships.

Leases

The Company accounts for its leases under ASC 842, Leases (“ASC 842"). At the inception of an arrangement, the Company determines whether the arrangement is or contains a lease. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. At the lease commencement date, when control of the underlying asset is transferred from the lessor to the Company, the Company classifies a lease as either an operating or finance lease and recognizes a right-of-use (“ROU”) asset and a current and non-current lease liability as applicable, in the consolidated balance sheets if the lease has a term greater than one year. As permitted under ASC 842, the Company has made an accounting policy election, for all classes of underlying assets, to not recognize ROU assets and lease liabilities for leases having an original term of twelve months or less. When it determines the appropriate classification and accounting for a lease arrangement, the Company typically only considers the committed lease term. Options to extend a lease are not included in the Company’s assessment unless there is reasonable certainty that the Company will either renew or not cancel the lease.

At the lease commencement date, operating lease liabilities and their corresponding ROU assets are recorded at the present value of future lease payments over the expected remaining lease term using the discount rate implicit in the lease, if it is readily determinable, or the Company’s incremental borrowing rate. The Company’s incremental borrowing rate reflects the fixed rate at which the Company could borrow the amount of the lease payments in the same currency on a collateralized basis, for a similar term in a similar economic environment. Lease cost for operating leases is recognized on a straight-line basis over the lease term as an operating expense. In addition, certain adjustments to the ROU asset may be required for items such as lease prepayments, incentives received or initial direct costs.

The Company enters into contracts that contain both lease and non-lease components. Non-lease components include costs that do not provide a right to use a leased asset but instead provide a service, such as maintenance costs. Variable costs associated with the lease, such as maintenance and utilities, are not included in the measurement of right-of-use assets and lease liabilities but rather are expensed when the events determining the amount of variable consideration to be paid have occurred.

Cash and Cash Equivalents and Restricted Cash

Cash consists of amounts held in bank savings and checking accounts. Cash equivalents include all highly liquid investments maturing within 90 days from the date of purchase. Cash equivalents consist of money market funds. The Company’s restricted cash consists of cash that the Company is contractually obligated to maintain and deposits of cash collateral held in accordance with the terms of various corporate credit cards. Restricted cash is included within other long-term assets on the consolidated balance sheets. A reconciliation of the amounts of cash and cash equivalents and restricted cash in the consolidated balance sheets to the amount in the consolidated statements of cash flows is as follows (in thousands):

Segment Reporting

The Company operates in a single operating and reportable segment. Operating segments are defined as components of an enterprise for which discrete financial information is available and is regularly reviewed by the chief operating decision maker (“CODM”) in order to make decisions regarding resource allocation and performance assessment. The Company has determined that its CODM is its Chief Executive Officer. The Company’s CODM reviews financial information presented on a regular basis at the consolidated level for purposes of allocating resources and evaluating financial performance. Since the Company operates as one operating segment, all required financial segment information can be found in the consolidated financial statements.

The Company’s products include the Allurion Smart Capsule and related accessories. See Note 3, Revenueand Note 16, Segment Information, below for financial information about the Company's significant segment expenses and sales in geographic areas, respectively.

Fair Value Measurements

Fair value is defined as the exchange price that would be received for an asset or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The carrying value of the Company’s financial instruments such as cash and cash equivalents, accounts payable, and accrued expenses approximate their fair values due to their short-term maturity. The Company’s assets and liabilities recorded at fair value have been categorized based upon a fair value hierarchy, which is distinguished between observable and unobservable inputs in accordance with authoritative accounting guidance:

Level 1 inputs: Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date

Level 2 inputs: Other than quoted prices included in Level 1, inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability

Level 3 inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that the observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset.

Inventories

Inventories, which include the costs of material, labor, and overhead, are stated at the lower of cost or net realizable value, with cost generally computed using the first-in, first out method. Estimated losses from obsolete and slow-moving inventories are recorded to reduce inventory values to their estimated net realizable value and are charged to cost of sales. At the point of loss recognition, a new cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in a recovery in carrying value.

Property and Equipment

Property and equipment include computers, laboratory equipment, machinery, and leasehold improvements. Property and equipment are recorded at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets, except for leasehold improvements, which are depreciated on a straight-line basis over the shorter of the estimated life or the lease term. Expenditures for repairs and maintenance are expensed as incurred.

Capitalized Internal-Use Software

Software development costs consist of certain consulting costs and compensation expenses for employees who devote time to the development projects of our internal-use software, as well as certain upgrades and enhancements that are expected to result in enhanced functionality. The Company amortizes these development costs over the estimated useful life, which is determined based on our best estimate of the useful life of the internal-use software after considering factors such as continuous developments in the technology, obsolescence, and anticipated life of the service offering before significant upgrades. Management evaluates the useful lives of these assets and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets.

The Company determined the amount of internal software costs to be capitalized based on the amount of time spent by our developers on projects in the application stage of development. There is judgment in estimating the time allocated to a particular project in the application stage. A significant change in the time spent on each project could have a material impact on the amount capitalized and related amortization expense in subsequent periods. As of December 31, 2025 and 2024, capitalized internal-use software was immaterial.

Impairment of Long-Lived Assets

The Company evaluates its long-lived assets, which consist primarily of property and equipment, for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value of the asset. To date, no impairments have occurred.

Debt Issuance Costs

The Company defers costs directly associated with acquiring third-party financing. Fees incurred to issue debt are generally deferred and amortized as a component of interest expense over the estimated term of the related debt using the effective interest rate method. Fees incurred in connection with a modification are deferred and amortized as a component of interest expense over the remaining life of the loan if due to the creditor. Third-party fees incurred in connection with a modification are expensed as incurred. Issuance costs and third-party fees incurred in connection with debt that is accounted for under the fair value options ("FVO") are expensed as incurred.

Warrants

The Company determines the accounting classification of warrants it issues, as either liability or equity classified, by first assessing whether the warrants meet liability classification in accordance with ASC 480-10, Accounting for Certain Financial Instruments with Characteristics of both Liabilities and Equity (“ASC 480-10”), then in accordance with ASC 815-40, Accounting for Derivative Financial Instruments Indexed to, and Potentially Settled in, a Company’s Own Stock (“ASC 815-40”). Under ASC 480-10, warrants are considered liability classified if the warrants are mandatorily redeemable, obligate the Company to settle the warrants or the underlying shares by paying cash or other assets, or are warrants that must or may require settlement by issuing a variable number of shares. If warrants do not meet liability classification under ASC 480-10, the Company assesses the requirements under ASC 815-40, which states that contracts that require or may require the issuer to settle the contract for cash are liabilities recorded at fair value, irrespective of the likelihood of the transaction occurring that triggers the net cash settlement feature. If the warrants do not require liability classification under ASC 815-40, and in order to conclude equity classification, the Company also assesses whether the warrants are indexed to its common stock and whether the warrants are classified as equity under ASC 815-40 or other applicable GAAP. After all relevant assessments, the Company concludes whether the warrants are classified as liability or equity. Liability classified warrants require fair value accounting at issuance and subsequent to initial issuance, with all changes in fair value after the issuance date recorded in the consolidated statements of operations. Equity classified warrants only require fair value accounting at issuance with no changes recognized subsequent to the issuance date.

Derivative Liabilities

The Company evaluates its convertible instruments and other contracts, including warrants, to determine if those contracts or embedded components of those contracts are required to be accounted for as derivatives, either in whole or in part. If an embedded derivative is bifurcated from a debt host contract, changes in the fair value of the bifurcated derivative are recorded in the accompanying consolidated statements of operations.

Equity-Classified Forward Contracts

The Company evaluates its forward contracts and other equity-linked arrangements to determine whether such contracts are indexed to the Company's own stock and meet the criteria for equity classification. Forward contracts that are determined to be equity classified are recorded in APIC at fair value on the contract issuance date. Subsequent to initial recognition, equity-classified forward contracts are not remeasured, and no changes in fair value are recognized in the consolidated statements of operations unless the contracts are modified or settled.

Earn-Out Liabilities

In connection with the Business Combination, certain holders of Legacy Allurion common stock and Legacy Allurion preferred stock and holders of vested options, warrants and restricted stock units exercisable or convertible into Legacy Allurion capital stock received the contingent right to receive up to 360,000 additional shares of Allurion Common Stock (the “Earn-Out Shares”) upon the achievement of certain earn-out targets. The contingent earn-out consideration contains a settlement provision that in the event of a change in control, the number of Earn-Out Shares issued may vary. This settlement provision precludes the earn-out liability from being indexed to the Company's Common Stock as a change in control event is not an input into the pricing of a fixed-for-fixed forward or option on equity shares. As such, it is classified as a liability under ASC 480, Distinguishing Liabilities from Equity ("ASC 480").

The fair value of the earn-out consideration is remeasured on a quarterly basis over the earn-out period with changes in the estimated fair value of the contingent earn-out consideration recorded in Other income (expense) in the consolidated statements of operations, and are reflected in the period in which they are identified. Changes in the estimated fair value of the contingent earn-out consideration may materially impact or cause volatility in our operating results.

Revenue Interest Financing and PIPE Conversion Option

In connection with the Business Combination, the Company entered into a revenue interest financing agreement, dated as of February 9, 2023 (the "Revenue Interest Financing Agreement") with certain entities that have engaged RTW Investments, LP as investment manager (collectively, “RTW”), under which the Company received $40.0 million upfront (the "Revenue Interest Financing"). In exchange, the Company is obligated to remit to RTW certain revenue interest payments on all current and future products, digital solutions and services developed, imported, manufactured, marketed, offered for sale, promoted, sold, tested or otherwise distributed by Allurion and its subsidiaries at a rate up to 6.0% of annual net sales prior to December 31, 2026. On or after January 1, 2027, the Company will remit revenue interest payments at a rate up to 10.0% of annual net sales, and it will continue to make revenue interest payments to RTW until December 31, 2030. Concurrently, and in connection with the Amended Note Purchase Agreement (as defined below), the Revenue Interest Financing Agreement was amended pursuant to the Omnibus Amendment (the "RIFA Amendment") by and among the Company, Allurion Opco, Allurion Australia Pty Ltd, a proprietary limited company organized under the laws of Australia and a wholly-owned subsidiary of the Company, the Original RIFA Investors (as defined therein) and RTW, on April 14, 2024. The RIFA Amendment, among other things, increased the rate of interest payments for net sales less than or equal to $100 million prior to December 31, 2026 from 6% to 12%and increased the rate on net sales in less than or equal to$100 million on or after January 1, 2027 from 10% to 12%. Additionally, the Prepayment Amount was modified such that, prior to March 31, 2026, the Company is entitled to settle the Revenue Interest Financing for a prepayment amount that would allow the investors to yield a 20% internal rate of return.

The Company accounts for the Revenue Interest Financing Agreement under the fair value option election of ASC 825. The Revenue Interest Financing Agreement accounted for under the FVO election is a debt host financial instrument that contains embedded features. The embedded features include requirements to settle the Revenue Interest Financing prior to maturity upon the occurrence of certain contingent events, a change in royalty rates upon the occurrence of certain contingent events, and the Company's ability to prepay the Revenue Interest Financing. As the Company has elected the FVO, these embedded features would not meet the criteria for bifurcation and separate accounting as the entire financial instrument is initially measured at its issue-date estimated fair value and then subsequently remeasured at estimated fair value on a recurring basis on each reporting period date. Changes in the estimated fair value of the Revenue Interest Financing Agreement are recorded as a component of Other income (expense) in the consolidated statements of operations. A portion of the estimated change in fair value must be reported in other comprehensive loss to the extent that it is attributable to instrument-specific credit risk. As a result of electing the FVO, direct costs and fees related to the Revenue Interest Financing are expensed as incurred.

In connection with the Company entering in the Revenue Interest Financing, the Company and RTW entered into the RTW side letter, as subsequently amended and restated on May 2, 2023 (the "Amended and Restated RTW Side Letter") under which RTW may elect to convert up to $7.5 million of its initial PIPE (as defined in Note 8, Revenue Interest Financing, Side Letter, and PIPE Conversion Option below) subscription into an additional revenue interest financing by forfeiting a number of shares of Allurion Common Stock acquired by the PIPE subscription (the "PIPE Conversion Option"). The Company accounts for the PIPE Conversion Option as a freestanding financial instrument that qualifies for derivative liability accounting in accordance with ASC 815, Derivatives and Hedging ("ASC 815"). The PIPE Conversion Option is initially measured at its fair value within Other liabilities on the consolidated balance sheets with corresponding recognition of expense at inception as there is no right received by the Company that meets the definition of an asset and the transaction did not involve a distribution or a dividend. Subsequent changes in fair value of the derivative liability are recognized as a gain or loss as a component of Other income (expense) in the consolidated statements of operations.

On October 22, 2024, funds affiliated with RTW provided notice to the Company of their election under the Amended and Restated RTW Side Letter, to surrender 30,000 shares of Common Stock of the Company representing $7.5 million in consideration for an additional Revenue Interest Financing Agreement. Accordingly, on October 30, 2024, the Company and the funds affiliated with RTW entered into the additional Revenue Interest Financing Agreement (the “New RIFA”). The New RIFA has substantially identical terms and conditions as the RIFA Amendment, except that the amount of financing provided under the New RIFA is equal to the conversion amount of $7.5 million, increasing the total principal amount of the Revenue Interest Financing to $47.5 million. Under the terms of the New RIFA, the royalty rates are increased by a factor of $47.5 million as a percentage of the original $40.0 million, resulting in a blended royalty rate of 14.3%. The Company accounts for the New RIFA under the fair value option elections of ASC 825.

The Company accounted for the RTW Convertible Notes (as defined in Note 7, Debt below) under the FVO election of ASC 825. The RTW Convertible Notes accounted for under the FVO election was a debt host financial instrument containing embedded features wherein the entire financial instrument was initially measured at its issue-date estimated fair value and then subsequently remeasured at estimated fair value on a recurring basis at each reporting period date. Changes in the estimated fair value of the RTW Convertible Notes were recorded as a component of Other income (expense) in the consolidated statements of operations. A portion of the estimated change in fair value must be reported in other comprehensive loss to the extent that it is attributable to instrument-specific credit risk. As a result of electing the FVO, direct costs and fees related to the RTW Convertible Notes were expensed as incurred.

Accounts Receivable

Accounts receivable are unsecured and are carried at net realizable value, including an allowance for doubtful accounts. Trade credit is generally extended on a short-term basis; trade receivables do not bear interest, although a finance charge may be applied to such receivables that are past due. The allowance for doubtful accounts is based on the Company’s assessment of the collectability of customer accounts. The Company regularly reviews the allowance by considering factors that may affect a customer’s ability to pay, such as historical expense, credit quality, the age of the account receivable balances, and current economic conditions. Amounts determined to be uncollectible are charged or written off against the allowance.

The following table summarizes activity in the allowance for doubtful accounts:

Revenue Recognition

The Company recognizes revenue under ASU No. 2014-09, Revenue from Contracts with Customers (“Topic 606” or “ASC 606”). In general, the Company’s sales contracts fall under its standard sales agreement whereby control transfers to the customer upon shipment, satisfying the performance obligations of the contract.

The Company recognizes revenue when control of its products is transferred to customers at an amount that reflects the consideration it expects to receive in exchange for those products. The Company’s revenue recognition process involves identifying the contract with a customer, determining the performance obligations in the contract, determining the transaction price, allocating the transaction price to the distinct performance obligations in the contract, and recognizing revenue as performance obligations are satisfied. A performance obligation is considered distinct from other obligations in a contract when it provides a benefit to the customer either on its own or together with other resources that are readily available to the customer and is separately identified in the contract. Performance obligations are considered satisfied once the Company has transferred control of a good or service to the customer, meaning that such customer has the ability to use and obtain the benefit of the good or service.

The Company has provided customers purchasing the Allurion Smart Capsule with an implied license for access to its VCS software. This implied software license was given to customers for no additional consideration and was not negotiated as part of the customer’s contracts. Further, the customer contracts and related purchase orders do not include nor specify rights or obligations associated with the VCS software. Based on this assessment, the Company determined the implied license to be immaterial in the context of the contract with customers purchasing the Allurion Smart Capsule, and as such did not allocate any value to the implied VCS license.

The Company generates revenue from sales of its Allurion Smart Capsule to distributors and health care providers. Customers typically purchase the Allurion Smart Capsule, including the gastric balloon and related accessories together, although customers can purchase the gastric balloon and its accessories separately. Therefore, each component of the Allurion Smart Capsule and accessories represents a distinct performance obligation and is separately identifiable. In arrangements with multiple performance obligations, the transaction price is allocated to each performance obligation using the relative standalone selling price. The Company determines standalone selling prices based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, the Company estimates the standalone selling price taking into account internally approved pricing guidelines and market conditions. Revenue is generally recognized upon shipment of the product because at that point, the customer obtains control of the product and has the ability to direct the use and obtain the benefit of the product. Components of the Allurion Smart Capsule are typically shipped to the customer together, resulting in the performance obligations in the contract being satisfied at the same time. Components shipped separately are recognized upon shipment at their relative standalone selling price.

The Company recognizes revenue at the transaction price, which reflects the consideration it believes it is entitled to receive. Transaction price includes estimates of variable consideration for promotions and prompt pay discounts, which are recorded as a reduction of transaction price in the period the related product revenue is recognized. The Company may also make payments to customers for marketing programs. Payments to customers for a distinct good or service that reasonably estimate the fair value of the distinct benefit received, such as marketing programs, are recorded as a marketing expense on the consolidated statement of operations and comprehensive loss.

The Company expenses incremental costs of obtaining a contract, such as sales commissions, when incurred because the amortization period would have been one year or less. These costs are recorded within sales and marketing expenses in the Company’s consolidated statement of operations and comprehensive loss.

The Company has also elected the sales tax practical expedient; therefore, sales and other taxes assessed by a governmental authority that are collected concurrently with revenue-producing activities are excluded from the transaction price.

The Company has also elected the significant financing component practical expedient, which allows management to not assess whether the contract has a significant financing component in circumstances where, at contract inception, the expected contract duration is less than one year.

Product Warranty

The Company does not provide general rights of return of products sold to its customers. However, the Company does provide for rights of exchange to its distributors and end-use customers for products that fail to conform to the Company’s specifications for a limited time following delivery. These performance specifications include that the Allurion Smart Capsule (i) is successfully filled upon initial placement when used according to the instructions for use provided by the Company and/or (ii) remains in the patient’s body for 90 days or more once placed. Customers may exchange product within 30 calendar days if they discover product nonconformities through a reasonable inspection and within 30 calendar days after discovery of any hidden or latent product nonconformities that could not have been discovered by a reasonable inspection.

These instances of nonconformity have been immaterial, and the Company’s management expects instances of nonconformity to be extremely rare.

Research and Development Costs

The Company expenses research and development costs as incurred. Research and development expenses consist of costs associated with performing research and development activities, including salaries and benefits, stock-based compensation, product development costs, materials and supplies, clinical trial activities, depreciation of equipment, and contract and other outside services. Payments for activities that are provided by outside vendors are based upon the terms of the individual arrangements with each vendor. Costs of certain of these activities are expensed based upon an evaluation of the progress to completion of specific tasks and actual costs incurred, using information provided to the Company by its vendors. As payments for these activities may differ from the pattern of costs actually incurred, additional costs are reflected in the consolidated financial statements as prepaid or accrued research and development expenses.

Advertising and Marketing Costs

The Company expenses advertising and marketing costs as incurred. Advertising and marketing expenses are included in sales and marketing operating expenses. Advertising and marketing costs for the years ended December 31, 2025 and 2024 were $1.5 million and $4.9 million, respectively.

Intellectual Property Prosecution Costs

The Company incurs registration and prosecution costs related to its intellectual property. The related costs are expensed as incurred and are classified as a component of general and administrative expenses.

Income Taxes

The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the Company’s consolidated financial statements and tax returns. Deferred tax assets and liabilities are determined based upon the differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities and for net operating loss and tax credit carryforwards, using enacted tax rates expected to be in effect in the year in which the differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance if it is more likely than not that these assets may not be realized.

The Company determines whether a tax position will be sustained upon examination. If it is not more likely than not that a position will be sustained, none of the benefit attributable to the position is recognized. The tax benefit to be recognized for any tax position that meets the more likely than not recognition threshold is calculated as the largest amount that is more than 50% likely of being realized upon resolution of the contingency. The Company accounts for interest and penalties related to uncertain tax positions as part of its provision for income taxes. As of December 31, 2025 and 2024, the Company hasnot identified any uncertain tax positions for which reserves would be required.

Net Loss Per Share

The Company applies the two-class method to compute basic and diluted net loss per share attributable to common stockholders, when shares meet the definition of participating securities. The two-class method determines net loss per share for each class of common and participating securities according to dividends declared or accumulated and participation rights in undistributed earnings. The two-class method requires income (loss) available to common stockholders for the period to be allocated between common and participating securities based upon their respective rights to share in the earnings as if all income (loss) for the period had been distributed. The Company reported a net loss attributable to common stockholders for the years ended December 31, 2025 and 2024.

Basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders less the cumulative undeclared dividend by the weighted average number of common shares outstanding for the period.

Dilutednet loss attributable to common stockholders is computed by adjusting net loss attributable to common stockholders to reallocate undistributed earnings based on the potential impact of dilutive securities. Diluted net loss per share attributable to common stockholdersis computed by dividing the diluted net loss attributable to common stockholders by the weighted average number of common shares outstanding for the period, including potential dilutive common shares assuming the dilutive effect of common stock equivalents.

Stock-Based Compensation

The Company recognizes compensation expense for awards based on the grant-date fair value of stock-based awards on a straight-line basis over the period during which an award holder provides service in exchange for the award. The Company accounts for awards issued to nonemployees under ASU No. 2018-07, Compensation—Stock Compensation (“Topic 718”): Improvements to Nonemployee Share-Based Payment Accounting, with the measurement date for nonemployee awards being the date of grant. The fair value of stock options is calculated using the Black-Scholes option-pricing model. The fair value of Restricted Stock Units (“RSUs”) is based on the fair market value of common stock at the date of grant. The Company records forfeitures as they occur.

Mezzanine Equity

Mezzanine equity represents the Series A Preferred Stock (defined below) issued by the Company. The shares of Series A Preferred Stock are redeemable at a determinable price on a fixed date, which results in mezzanine equity classification (outside of permanent equity) on the Company’s consolidated balance sheet. Refer to Note 11, Capital Stockand Stockholder's Deficit, for additional information regarding the Series A Preferred Stock. On December 19, 2024 the shares Series A Preferred Stock were converted into shares of Common Stock following the Series A Stockholder Approval (defined below). As of December 31, 2025 no shares of preferred stock are outstanding.

Comprehensive Loss

For the years ended December 31, 2025 and 2024, comprehensive loss consists of net loss and other comprehensive loss, which includes changes in the fair value attributable to instrument-specific credit risk related to the Revenue Interest Financing with RTW and the RTW Convertible Notes.

Recently Adopted Accounting Pronouncements

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which require public entities, on an annual basis, to provide disclosure of specific categories in the rate reconciliation, as well as disclosure of income taxes paid disaggregated by jurisdiction. The Company adopted ASU 2023-09 prospectively for its consolidated financial statements for the fiscal year ended December 31, 2025.

Recently Issued Accounting Pronouncements Not Yet Adopted

In November 2024, the Financial Accounting Standards Board issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which intends to improve financial reporting by requiring disclosure of additional information about specific expense categories. This guidance is effective for annual reporting periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027. Early adoption is permitted and the guidance is to be applied prospectively and may be applied retrospectively. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures.

3. Revenue

Revenue by geographic region is based on the country in which our customer is domiciled and is summarized by geographic area as follows (in thousands):

There is currentlyno revenue generated in the United States from sales of the Allurion Smart Capsule. For the year ended December 31, 2025, $4.7 million of revenue was generated infive countries included within All other countries in the table above, representing approximately 31% of Total Revenues, with each country responsible for approximately 4%-9% of the total. The remaining revenue was generated by sales in 44 other countries included within All other countries. For the year ended December 31, 2024, $10.3 million of revenue was generated infive countries included within All other countries, representing approximately 32%of

Total Revenues, with each country responsible for approximately 4%-8% of the total. Remaining revenue was generated by sales in 53 other countries included within All other countries.

4. Inventory

Inventory consists of the following (in thousands):

Inventory is stated net of $2.1 million and$1.6 million for the provision of excess and obsolete inventory as of December 31, 2025 and 2024, respectively.

5. Property and Equipment, net

Property and equipment consist of the following (in thousands):

Depreciation expense was$1.0 million for each the years ended December 31, 2025 and 2024, recorded as follows (in thousands):

6. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consist of the following (in thousands):

In November 2024, the Company's management approved and initiated plans to reduce its cost structure. The restructuring plan initiated in November 2024 was substantially completed during the first half of 2025, with remaining payments to be made in accordance with local regulations through April 2026. Substantially all of the charge represents the severance cost of terminated employees, and are included in cost of revenue and operating expenses in the statement of operations. The following table rolls forward the activity in the restructuring accrual for the November 2024 action through December 31, 2025.

In August 2025, the Company's management approved and initiated plans to reduce its cost structure. The restructuring plan initiated in August 2025 was substantially completed during the third quarter of 2025, with remaining payments to be made in accordance with local regulations through December 2026. Substantially all of the charges represent the severance cost of terminated employees, and are included in cost of revenue and operating expenses in the statement of operations. The following table rolls forward the activity in the restructuring accrual for the August 2025 action through December 31, 2025.

7. Debt

The components of the Company’s third-party debt consisted of the following (in thousands):

Fortress Term Loan

On August 1, 2023, the Company entered into the Fortress Term Loan pursuant to the Fortress Credit Agreement with Fortress that provided gross proceeds of $60 million. The Fortress Term Loan has a maturity date of June 30, 2027 and accrues interest per annum at a rate of 6.44% plus the greater of (i) the Wall Street Journal Prime Rate and (ii)3.0%, which interest is payable in arrears on a monthly basis. An exit payment equal to 3.0% of the Fortress Term Loan (the "Exit Fee") is due upon prepayment or the maturity date of the Fortress Term Loan, in addition to any early prepayment fee. The Exit Fee is treated as additional interest expense and is accreted over the life of the loan using the effective interest method. Proceeds of the Fortress Term Loan were used, in part, to repay all amounts outstanding under the 2021 Term Loan. In connection with the issuance of the Fortress Term Loan, the Company paid issuance costs of $2.5 million, which were recorded as a debt discount and were amortized over the remaining life of the loan.

On December 29, 2023, the Company entered into an amendment to the Fortress Credit Agreement (the "Fortress Amendment"). The Fortress Amendment waived the December 31, 2023 minimum revenue covenant under the Fortress Credit Agreement and modified the minimum liquidity covenant by increasing the minimum liquidity amount from $12.5 million to $33.5 million until March 31, 2024, $23.5 million from April 1, 2024 to June 30, 2024, $16.9 million from July 1, 2024 to September 30, 2024 and $12.5 million on October 1, 2024 and thereafter. The Fortress Amendment also provided that at any time after March 31, 2024, each lender will have the right to convert a portion of the outstanding principal amount, not to exceed the lender's proportionate share of a maximum of $20.0 million in aggregate outstanding principal amount, into shares of Common Stock of the Company at a conversion price based on the 30-day volume weighted average price ("VWAP") of the Common Stock on the NYSE ending on the trading day immediately preceding the date of exercise of the lender's conversion right (the "Fortress Conversion Option"). As part of the Fortress Amendment, the Company prepaid $20.0 million of the principal outstanding under the Fortress Credit Agreement. Additionally, $3.1 million of fees were incurred and considered paid-in-kind and capitalized as an additional debt discount and added to the outstanding principal amount of the loans under the Fortress Amendment. The fees will be amortized through interest expense over the remaining life of the loan. The Fortress Amendment was accounted for as a modification under ASC 470, Debt.

The Company assessed the terms and features of the Fortress Credit Agreement in order to identify any potential embedded features that would require bifurcation or any beneficial conversion features. The terms and features assessed include, under certain circumstances, a default interest rate of 3% which will apply to all outstanding obligations during the occurrence and continuance of an event of default. The Company concluded that this feature is not clearly and closely related to the host instrument and represents an embedded derivative (the "Term Loan Derivative Liability") that is required to be re-remeasured at fair value on a quarterly basis. At the inception of the Fortress Term Loan, the fair value of the embedded derivative was determined to be immaterial. The Term Loan Derivative Liability was fair valued tozero in connection with the repayment of the Fortress Term Loan, with a corresponding $2.0 million gain recorded inother income (expense), net in the consolidated statement of operations for the year ended December 31, 2024.

On April 16, 2024, the Company repaid all outstanding obligations under the Fortress Term Loan with proceeds from the Amended Note Purchase Agreement (as defined below) with RTW. The total payoff amount was $48.0 million, consisting of $43.1 million repayment of principal, a $2.7 million prepayment fee, a $1.3 million exit fee, $0.6 million of other fees paid directly to Fortress, and $0.3 million of accrued interest. The Company recorded an $8.7 million loss on extinguishment of debt in connection with the Fortress Term Loan repayment in the consolidated statement of operations for year ended December 31, 2024.

Interest expense for the year ended December 31, 2024 related to the Fortress Term Loan was$2.3 million, consisting of $1.9 million of contractual interest, $0.3 million amortization of the debt discount, and term loan accretion of $0.1 million. The average interest rate through April 16, 2024 was 14.94%.

On April 14, 2024, the Company entered into a note purchase agreement (the "Original Note Purchase Agreement") with RTW as agent for the purchasers (the "Purchasers") party thereto from time to time (RTW in such capacity, the "Principal Purchaser"), and Acquiom Agency Services LLC ("Acquiom") as collateral agent for the Purchasers. Subsequently, on April 16, 2024, the Company, the Principal Purchaser, the Purchasers, and Acquiom entered into the First Amendment to the Original Note Purchase Agreement (the Original Note Purchase Agreement as amended, the "Amended Note Purchase Agreement").

Pursuant to the Amended Note Purchase Agreement, the Company issued and sold $48.0 million of convertible senior secured notes (the "RTW Convertible Notes"). The RTW Convertible Notes bear interest at an annual rate of 6%, which interest is paid quarterly in cash or, at the Company's option, in kind for the first three years. The RTW Convertible Notes will mature on April 16, 2031 unless previously converted pursuant to the terms of the Amended Note Purchase Agreement. The RTW Convertible Notes are convertible into shares of Allurion Common Stock, at a Purchaser’s election at any time after the earliest of (i) the date on which Stockholder Approval (as defined below) is obtained, (ii) December 31, 2025, (iii) the date of a Fundamental Change Company Notice (as defined in the Amended Note Purchase Agreement), and (iv) the Make-Whole Fundamental Change Effective Date (as defined in the Amended Note Purchase Agreement), subject to certain terms and limitations in the Amended Note Purchase Agreement, based on a conversion rate of 24.6920 shares of common stock per $1,000 principal amount of Notes (equivalent to a conversion price of approximately $40.50 per share, which represents a 35%premium to the lowest price per share in an equity financing for capital raising purposes ending on the date on which the Company has raised aggregate gross offering proceeds of at least $15.0 million (the “Next Equity Financing”). On July 1, 2024, we consummated the Public Offering, as described elsewhere in this Annual Report on Form 10-K, which constituted a Next Equity Financing. The Amended Note Purchase Agreement provides that unless and until requisite approval of the Company’s stockholders is obtained (“Stockholder Approval”), the Company will not deliver Allurion Common Stock upon conversion of the RTW Convertible Notes in excess of 1% of the number of shares of Allurion Common Stock outstanding as of April 14, 2024. Stockholder Approval was obtained at the Company's annual meeting of stockholders held on December 16, 2024.

On January 7, 2025, the Company and Allurion Technologies, LLC ("Allurion OpCo") entered into an Omnibus Amendment (the "Omnibus Amendment") with Allurion Australia Pty Ltd, Allurion France, and RTW to amend the Amended Note Purchase Agreement, the Revenue Interest Financing Agreement, and the New RIFA (collectively, the "Existing Documents").

The Omnibus Amendment requires, among other things, (i) the Company and Allurion OpCo to maintain certain minimum balances of unrestricted cash in controlled accounts in the U.S. in the amounts corresponding to the calculations set forth therein, and (ii) the Company to receive minimum trailing 12-month consolidated Revenue (as defined in the Amended Note Purchase Agreement) in amounts set forth therein, tested quarterly beginning with the 12-month period ending September 30, 2025. The Omnibus Amendment also requires that (i) Allurion France shall have successfully regained marketing authorization from the Agence Nationale de Sécurité du Médicament (“ANSM”) in France on or prior to December 31, 2025 and (ii) Allurion OpCo shall have received Marketing Authorization from the U.S. Food & Drug Administration for the Commercialization of the Product in the United States no later than June 30, 2026.

Pursuant to the Omnibus Amendment, the investors and the purchasers party thereto will receive a number of shares of the Company’s Common Stock, representing in the aggregate five percent of the fully-diluted shares outstanding immediately after the closing of the offering and sale of Additional Shares (as defined in the Existing Documents) to be consummated no later than February 15, 2025, in connection with which the Company shall have raised at least $12.0 million aggregate net proceeds (the “Share Obligation”); provided that, in the event the Company cannot issue shares of Common Stock to the Investors and the Purchasers due to applicable law or NYSE listing rules, the Company will instead issue an equivalent (as-converted) number of shares of a newly created series of Series A-1 non-voting preferred stock (the “Series A-1 Preferred Stock”) and the Company shall include a proposal in a definitive proxy statement on Schedule 14A seeking stockholder approval no later than December 31, 2025 to allow the conversion of Series A-1 Preferred Stock into Common Stock; provided further that, each share of Series A-1 Preferred Stock outstanding on December 31, 2026 will, except to the extent prohibited by Delaware law governing distributions to stockholders (including the Delaware General Corporation Law), be redeemed by the Company for cash in an amount equal to the as-converted value of the underlying Common Stock.

On April 15, 2025, the Company, the Principal Purchaser, and the Purchasers entered into a Second Amendment to the Note Purchase Agreement (the "Second Amendment to Note Purchase Agreement"), which amended the Existing Note Purchase Agreement to reflect additional conversions and other provisions. The Second Amendment to Note Purchase Agreement provides for the mandatory conversion of $5.0 million of principal amount of the RTW Convertible Notes in the event the Company’s market capitalization, as determined in accordance with the rules of the NYSE, is reasonably expected to fall below $15.0 million (the “Market Capitalization Condition”). In the event such Market Capitalization Condition is triggered, the Purchasers shall provide notice to the Company, and the Company shall accept such notice, to convert $5.0 million aggregate principal amount of the RTW Convertible Notes at the Floor Conversion Rate (defined below), and such amount shall be converted into 1,492,539 shares of common stock. The Purchasers also have the right to provide notice to the Company to convert up to an additional $5.0 million of aggregate principal amount of the RTW Convertible Notes into shares of common stock at an agreed conversion rate. The Company has the right to accept or reject such conversion in its sole discretion. The Company and the Purchasers will mutually agree on the agreed conversion rate, provided that it is not more than 298.5075 shares of common stock per $1,000 principal amount of the RTW Convertible Notes, reflecting a floor conversion price of $3.35 per share of common stock (the “Floor Conversion Rate”).

In addition, without regard to the Market Capitalization Condition, the Purchasers may provide the Company notice to convert up to an additional $5.0 million aggregate principal amount of the RTW Convertible Notes into shares of common stock at the 5-Day VWAP Conversion Rate, which the Company may accept or reject in its sole discretion. The "5 Day VWAP Conversion Rate” is the lesser of (i) the quotient of $1,000 divided by the daily volume weighted average price of the common stock for the five consecutive trading day period ending on the trading day immediately preceding the date of the delivery of the Purchaser’s notice discounted by five percent and (ii) the Floor Conversion Rate. Finally, during the one year period ending on April 15, 2026, the Purchasers in their sole discretion may provide the Company notice to convert up to an additional $1.0 million aggregate principal amount of the RTW Convertible Notes in any 30-day period into shares of common stock at the 5-Day VWAP Conversion Rate. If the Purchasers do not exercise their right to provide a notice to convert all or a portion of $1.0 million aggregate principal amount of the RTW Convertible Notes per month, any shortfall may be included in the amount to be converted in a subsequent 30-day period. The maximum principal amount of the RTW Convertible Notes that may be converted under such monthly conversion provision is $12.0 million.

The Second Amendment to Note Purchase Agreement is accounted for as an extinguishment of debt under ASC 470, due to thesubstantive conversion features included in the Second Amendment to Note Purchase Agreement. The fair value of the RTW Convertible Notes were remeasured immediately before and after the Amendment was signed on April 15, 2025 as $31.6 million and $32.2 million, respectively. As a result the Company recorded a loss from the extinguishment of debt of $0.7 million. On April 16, 2025, the Purchasers provided notice of conversion of $5.0 million of principal amount of the RTW Convertible Notes based on the triggering of the Market Capitalization Condition. The corresponding equity issued consists of a reduction of the liability of $3.2 million and increase to additional paid-in capital ("APIC") of $3.2 million. On November 4, 2025, the Purchasers provided notice of conversion of an additional $5.0 million of principal amount of the RTW Convertible Notes based on the triggering of the Market Capitalization Condition. The corresponding equity issued consists of a reduction of liability of $3.4 million and increase to APIC of $3.4 million.

The RTW Convertible Notes were accounted for under the FVO election of ASC 825 at inception in April 2024 as the notes contain embedded derivatives, including the conversion upon Stockholder Approval, the conversion upon a Fundamental Change Company Notice (as defined in the RTW Convertible Notes), the conversion upon a Make-Whole Fundamental Change (as defined in the RTW Convertible Notes), redemption upon the event of default, and redemption upon a Fundamental Change (as defined in the RTW Convertible Notes), which would require bifurcation and separate accounting. The RTW Convertible Notes will continue to be accounted for under the FVO election following the extinguishment of debt in connection with the Second Amendment to Note Purchase Agreement. Prior to the Amendment, the RTW Convertible Notes were initially measured at their issue-date estimated fair value and subsequently remeasured at estimated fair value on a recurring basis at each reporting period date. The fair value of the RTW Convertible Notes at issuance in April 2024 was $49.1 million, with a corresponding $1.1 million loss recognized in Other income (expense), net in the consolidated statement of operations. In connection with the issuance of the RTW Convertible Notes and RIFA Amendment (as defined below), the Company incurred $1.4 million in issuance costs, which were directly expensed through general and administrative expense due to the FVO election of the RTW Convertible Notes and Revenue Interest Financing.

The Share Obligation is accounted for as a liability under ASC 480. As the Share Obligation was initiated in exchange for amendments of the Amended Note Purchase Agreement, the Revenue Interest Financing Agreement, and the New RIFA, all of which are accounted for under the FVO election, the liability was recorded at its initial fair value of $1.3 million, with an offset to Other income (expense). The liability will be remeasured at estimated fair value on a recurring basis at each reporting period date until it is settled. The Omnibus Amendment results in a modification of the Amended Note Purchase Agreement, the Revenue Interest Financing Agreement, and the New RIFA.

For the year ended December 31, 2025, the Company recorded a loss of $3.6 million and a gain of $5.3 million through the consolidated statements of operations and other comprehensive income (loss), respectively. For the year ended December 31, 2024, the Company recorded a gain of $18.1 million and a loss of $4.7 million through the consolidated statements of operations and other comprehensive income (loss), respectively.

The Company elected paid in kind interest for the years ended December 31, 2025 and December 31, 2024 related to the RTW Convertible Notes. As of December 31, 2025 we are out of compliance with the covenants of the RTW Convertible Notes and as such it has been reclassified to a current liability on the consolidated balance sheets.

8. Revenue Interest Financing, Side Letter, and PIPE Conversion Option

On February 9, 2023, Legacy Allurion entered into the Revenue Interest Financing Agreement. Pursuant to the Revenue Interest Financing, at the closing of the Business Combination, RTW paid Allurion an aggregate of $40.0 million (the "Investment Amount"). In exchange for the Investment Amount, Allurion will remit revenue interest payments on all current and future products, digital solutions and services developed, imported, manufactured, marketed, offered for sale, promoted, sold, tested or otherwise distributed by Allurion and its subsidiaries at a rate up to 6.0% of annual net sales prior to December 31, 2026. On or after January 1, 2027, the Company will remit revenue interest payments at a rate up to 10.0% of annual net sales, and it will continue to make revenue interest payments to RTW until December 31, 2030. Such payments were subsequently modified pursuant to the RIFA Amendment, discussed below.

If RTW has not received aggregate revenue interest payments equal to at least 100% of the Investment Amount by December 31, 2027, the Company must make a cash payment in an amount sufficient to catch RTW up to 100% of the Investment Amount. If RTW has not received revenue interest payments equal to at least 240% of the Investment Amount by December 31, 2030, the Company must make a cash payment in an amount sufficient to catch RTW up to 240% of the Investment Amount. In any event, RTW shall not receive aggregated revenue interest payments in excess of 260% of the Investment Amount (the "Hard Cap"). In addition, prior to December 31, 2025, the Company may prepay a pre-specified payment amount (the "Prepayment Amount") and terminate the Revenue Interest Financing Agreement. The Prepayment Amount shall be an amount equal to 165% of the Investment Amount less the sum of all revenue interest payments made to RTW prior to such date of prepayment.

The Revenue Interest Financing is accounted for under the FVO election as the Revenue Interest Financing contains embedded derivatives, including the requirements to settle the Revenue Interest Financing prior to maturity upon the occurrence of certain contingent events and the Company's ability to prepay the Revenue Interest Financing, which would require bifurcation and separate accounting. The Revenue Interest Financing is initially measured at its issue-date estimated fair value and subsequently remeasured at estimated fair value on a recurring basis at each reporting period date. Changes in fair value are recorded as a component of Other income (expense) in the consolidated statements of operations. A portion of the estimated change in fair value must be reported in other comprehensive loss to the extent that it is attributable to instrument-specific credit risk. In connection with the issuance of the Investment Amount, we paid $1.2 million in issuance costs in August 2023, which were directly expensed through general and administrative expenses due to the FVO election. As of December 31, 2025 the Company has made $6.6 million in royalty payments to RTW. Refer to FN 9, Fair Value Measurements, for additional information regarding the changes in fair value of the Revenue Interest Financing.

Concurrently, and in connection with the Amended Note Purchase Agreement, the Revenue Interest Financing Agreement was amended pursuant to the Omnibus Amendment (the "RIFA Amendment") by and among the Company, Allurion Opco, Allurion Australia Pty Ltd, a proprietary limited company organized under the laws of Australia and a wholly-owned subsidiary of the Company, the Original RIFA Investors (as defined therein) and RTW, on April 14, 2024. The RIFA Amendment, among other things, increased the rate of revenue interest payments to be paid to RTW on all current and future products, digital solutions and services developed, imported, manufactured, marketed, offered for sale, promoted, sold, tested or otherwise distributed by Allurion and its subsidiaries for net sales less than or equal to $100 million prior to December 31, 2026 from 6% to 12% and increased the rate on net sales in less than or equal to $100 million on or after January 1, 2027 from 10% to 12%. Additionally, the Prepayment Amount was modified such that, prior to March 31, 2026, the Company is entitled to settle the Revenue Interest Financing for a prepayment amount that would allow the investors to yield a 20% internal rate of return.

The RIFA Amendment was accounted for as a modification with the change in fair value of the PIPE Conversion Option treated as an exchange between the Company and RTW as part of the RIFA Amendment. As such, the Revenue Interest Financing and PIPE Conversion Option were remeasured as of April 16, 2024 just prior to the RIFA Amendment, to $33.0 million and $6.6 million, respectively. The Revenue Interest Financing and PIPE Conversion Option were subsequently remeasured as of April 16, 2024 under the terms of the RIFA Amendment, to $39.0 million and $4.6 million, respectively.

In connection with the Company entering into the Revenue Interest Financing, if, at any time beginning 12 months and ending 24 months following the closing of the Mergers, the VWAP per share of Allurion Common Stock is less than $176.00 for the average of 20 trading days within any 30 trading day period (“Stock Price Drop”); and the absolute value of the percentage decrease of such Stock Price Drop measured from a reference price of $250.00 per share of Allurion Common Stock is greater than the absolute value of the percentage decrease in the VWAP of a comparable publicly traded peer index as defined in the Amended and Restated RTW Side Letter over the same time period, then RTW may elect to convert up to $7.5 million of its initial PIPE subscription into additional revenue interest financing to be added to the Investment Amount by forfeiting a number of shares of Allurion Common Stock acquired in the PIPE subscription. The PIPE Conversion Option is accounted for as a derivative under ASC 815. The PIPE Conversion Option was initially measured at its issue-date estimated fair value of $3.3 million within Other liabilities on the consolidated balance sheet with corresponding recognition of expense at inception as there is no right received by the Company that meets the definition of an asset and the transaction did not involve a distribution or a dividend. The PIPE Conversion Option was subsequently remeasured at its estimated fair value on a recurring basis at each reporting period date, with a gain or loss recognized within Other income (expense).

On October 22, 2024, funds affiliated with RTW provided notice to the Company of their election of the PIPE Conversion Option under the Amended and Restated RTW Side Letter, to surrender 30,000 shares of Common Stock of the Company representing $7.5 million in consideration for an additional Revenue Interest Financing Agreement. Accordingly, on October 30, 2024, the Company and the funds affiliated with RTW entered into the additional Revenue Interest Financing Agreement (the "New RIFA"). The New RIFA has substantially identical terms and conditions as the Revenue Interest Financing Agreement except that the amount of financing provided under the New RIFA is equal to the conversion amount of $7.5 million (the "Additional Investment Amount"). The Additional Investment Amount results in proportional increases to the minimum aggregate revenue interest payments described above.

The exercise of the PIPE Conversion Option was accounted for as a settlement of the derivative liability. As such, the PIPE Conversion Option was remeasured as of October 30, 2024 just prior to conversion, to $7.4 million. The PIPE Conversion Option was subsequently reclassified as an addition to the Revenue Interest Financing liability upon conversion into the New RIFA. The New RIFA was accounted for under the FVO election, similar to the Revenue Interest Financing. As such, the New RIFA, together with the Revenue Interest Financing was remeasured as of October 30, 2024, to $48.9 million. Additionally, to account for the 30,000 forfeited shares in connection with the exercise of the PIPE Conversion Option, the total shares were valued based on the October 30, 2024 closing share price of $18.25, resulting in a $0.5 million reduction to APIC. As of December 31, 2025, the fair value of the Revenue Interest Financing and New RIFA was $47.7 million. As of December 31, 2024, the fair value of the Revenue Interest Financing and New RIFA was $49.2 million.

For the year ended December 31, 2025, the Company recorded a loss of $9.1 million and a gain of $8.2 million on the Revenue Interest Financing through the consolidated statements of operations and other comprehensive income (loss), respectively. For the year ended December 31, 2024, the Company recorded losses of $4.3 million and $4.4 million on the Revenue Interest Financing through the consolidated statements of operations and other comprehensive income (loss), respectively. The change in fair value were recorded in the Changes in fair value of Revenue Interest Financing and PIPE Conversion Option in the consolidated statement of operations.

9. Fair Value Measurements

The following tables present the fair value hierarchy for assets and liabilities that are measured at fair value at issuance date and on a recurring basis and indicate the level within the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value (in thousands):

Public Warrants

As a result of the Business Combination on August 1, 2023, the Company assumed 13,206,922 outstanding public warrants (the "Public Warrants") to purchase an aggregate 750,394 shares of Allurion Common Stock at $202.50 per share following the Warrant Amendment (defined in Note 11, Capital Stock and Stockholders Deficit). The Company concluded the Public Warrants met the definition of a liability based on the settlement provision that allows the warrant holders to net-share settle their warrants in the event of a failed registration statement within 60 days of the Business Combination or any time a registration is not effective. The Public Warrants are traded on the NYSE and are recorded at fair value using the closing price as of December 31, 2025 of $0.02, which is a Level 1 input.

Legacy Allurion Warrants, Public Offering Warrants, July 2024 Private Placement Warrants, January 2025 Warrants, February 2025 Offering Warrants, and November 2025 Warrants

The Company has classified the Legacy Allurion Common Stock Warrants, Public Offering Warrants (defined below), July 2024 Private Placement Warrants (defined below), January 2025 Warrants (defined below), February 2025 Offering Warrants, (defined below), and November 2025 Warrants (defined below) within Level 3 of the hierarchy as the fair value is derived using the Black-Scholes option pricing model, which uses a combination of observable (Level 2) and unobservable (level 3) inputs. See table below for the assumptions used in the pricing model of the Legacy Allurion Common Stock Warrants, Public Offering Warrants, July 2024 Private Placement Warrants, January 2025 Warrants, February 2025 Offering Warrants, and November 2025 Warrants:

Expected dividend yield for all calculations is 0.00%.

The following table reconciles the changes in fair value for the years ended December 31, 2025 and 2024 of the warrant liabilities valued using Level 3 inputs:

2019 Term Loan Success Fee Derivative Liability

The derivative liability for the success fee associated with Legacy Allurion's November 2019 loan and security agreement with Western Alliance Bank (the "2019 Term Loan" and such fee, the "Success Fee") was recorded at fair value as of December 31, 2025 and 2024 using the following assumptions: weighted-average probability for the likelihood of a change in control or liquidity event within four years from the initial valuation date of the derivative liability and a market-based discount rate that will increase or decrease each period based on changes in the probability in the future cash flows.

Revenue Interest Financing and PIPE Conversion Option

The Revenue Interest Financing was accounted for using the FVO election. Under the FVO election, the financial instrument is initially measured at its issue-date estimated fair value and subsequently remeasured at estimated fair value on a recurring basis at each reporting period date. The fair value of the Revenue Interest Financing was remeasured as of December 31, 2025 and December 31, 2024 using a discounted cash flow ("DCF") method under the income approach utilizing future revenue projections and a discount rate of 26.5% and 21.1%, respectively.

The fair value of the PIPE Conversion Option was accounted for as a derivative under ASC 815. Upon the exercise of the PIPE Conversion Option and resulting New RIFA on October 30, 2024, the PIPE Conversion Option was reclassified as an addition to the

Revenue Interest Financing liability, and as such there is no PIPE Conversion Option liability as of December 31, 2025 and December 31, 2024.

Earn-Out Liability

Upon the closing of the Business Combination, Legacy Allurion equity holders are entitled to receive additional shares of Allurion Common Stock if the share price achieves certain targets (the "Earn-Out Shares). The Earn-Out Shares were accounted for as a liability because the triggering events that determine the number of shares to be earned included events that were not indexed to Allurion Common Stock, with the change in fair value recognized in Change in the fair value of earn-out liabilities in the consolidated statement of operations. The estimated fair value of the earn-out shares was determined using a Monte Carlo Simulation Method ("MCSM") using the following assumptions at the following valuation dates:

Term Loan Derivative Liability

The Term Loan Derivative Liability associated with the Fortress Term Loan was derecognized during the second quarter of 2024 as the Fortress Loan was repaid on April 16, 2024.

The RTW Convertible Notes are accounted for using the FVO election. Under the FVO election, the financial instrument is initially measured at its issue-date estimated fair value and subsequently measured at estimated fair value on a recurring basis at each reporting period date. The fair value of the RTW Convertible Notes was remeasured as of December 31, 2025 using a DCF method under the income approach with MCSM applied to determine the simulated stock price at each payment date and event that may trigger conversion of the RTW Convertible Notes. The fair value was measured using the $38.0 million principal amount and $4.9 million of payment in kind interest of the RTW Convertible Notes and the following assumptions:

Share Obligation

The Share Obligation is accounted for as a liability under ASC 480, with the liability initially measured at its issue-date estimate fair value and subsequently measured at its estimated fair value on a recurring basis at each reporting period date. The estimated fair value of the Share Obligation was determined using a MCSM with the following assumptions at the valuation date:

The changes in the fair values of the Success Fee derivative liability, Revenue Interest Financing, PIPE Conversion Option, Earn-out liability, Term Loan Derivative Liability, RTW Convertible Notes, and Share Obligation categorized with Level 3 inputs for the years ended December 31, 2025 and 2024 were as follows:

The change in fair value of the Success Fee derivative liability, Revenue Interest Financing, PIPE Conversion Option, Earn-Out liability, Term Loan Derivative Liability, and RTW Convertible Notes at each period is recorded as a component of Other income (expense) in the consolidated statements of operations, with the exception of the change in fair value associated with the change in credit risk related to the Revenue Interest Financing and RTW Convertible Notes, which is recorded as a component of other comprehensive loss.

10. Income Taxes

The components of loss before income taxes for the years ended December 31, 2025 and 2024 are as follows (in thousands):

The components of the provision for income taxes for the years ended December 31, 2025 and 2024 consisted of the following (in thousands):

The following is a reconciliation between the effective tax rate and the statutory federal income tax rate for the years ended December 31, 2025 in accordance with the guidance in the ASU No. 2023-09, which the Company has elected to prospectively adopt (in thousands):

(1) State Taxes in Massachusetts made up the majority (greater than 50%) of the tax effect in this category.

The following is a reconciliation of the Company's effective tax rate and the statutory federal income tax rate for the year ended December 31, 2024 prior to the adoption of ASU No. 2023-09:

Significant components of the Company’s deferred tax assets are as follows (in thousands):

The Company recorded income tax expense of $0.1 million during the year ended December 31, 2025 due to foreign operating income. The Company recorded $0.7 million of income tax expense during the year ended December 31, 2024. The Company maintains a valuation allowance for the full amount of the net United States deferred tax assets, as the realization of the deferred tax assets is not determined to be more likely than not. The valuation allowance increased for the years ended December 31, 2025 and 2024 by approximately $9.4 million and $19.8 million, respectively, due to an increase in deferred tax assets having a full valuation allowance primarily due to the operating losses incurred, capitalized research and development expenses and tax credits generated.

As of December 31, 2025, the Company had $223.8 million and $223.7 million of federal and state NOL carryforwards, respectively. Of the federal NOL carryforwards, $12.8 million expire between 2030 and 2037 and $211.0 million do not expire. The state NOL carryforwards expire between 2030 and 2045. As of December 31, 2025, the Company had $1.7 million and $1.1 million of federal and state research and development tax credits, which expire beginning in 2031 and 2028, respectively.

Changes to the Company’s valuation allowance are as follows (in thousands):

Realization of the future tax benefits from these assets is dependent on many factors, including the Company’s ability to generate taxable income within the net operating loss carryforward period. Under the provisions of the Internal Revenue Code, certain substantial changes in the Company’s ownership, including a sale of the Company or significant changes in ownership due to sales of equity, may have limited, or may limit in the future, the amount of net operating loss and research and development credit carryforwards that could be used annually to offset future taxable income. The Company has not completed a study to assess whether a change of control has occurred or whether there have been multiple changes of control since the Company’s formation due to the significant complexity and cost associated with such study and because there could be additional changes in control in the future. As a result, the Company is not able to estimate the effect of the change in control, if any, on the Company’s ability to utilize net operating loss and research and development credit carryforwards in the future.

The Company is subject to US federal income tax, state income tax in Massachusetts, and income tax in certain foreign jurisdictions. The Company’s historical income taxes in foreign jurisdictions have been immaterial to the consolidated financial statements. The Company is not currently under examination by the Internal Revenue Service (“IRS”) or any other jurisdictions for any tax years; however, all tax years since inception remain open to examination by the major taxing jurisdictions to which the Company is subject, as carryforward attributes generated in years past may still be adjusted upon examination by the U.S. IRS or other authorities if they have, or will be, used in a future period.

As of December 31, 2025 and 2024, the unremitted earnings of the Company’s foreign subsidiaries are immaterial.

Interpretive guidance on the accounting for global intangible low-taxed income (“GILTI”) states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred as a period expense. The Company made the accounting policy election to recognize GILTI as a period expense.

As of December 31, 2025 and 2024, the Company hasnot recorded a tax liability for any uncertain tax positions. Interest and penalties associated with uncertain tax positions are recorded as a component of income tax expense. There areno accrued interest and penalties as of December 31, 2025 and 2024.

11. Capital Stock and Stockholders' Deficit

Preferred Equity

Series A Preferred Stock

On June 28, 2024, the Company entered into a subscription agreement (the “Subscription Agreement”) with RTW, pursuant to which the Company agreed to sell to RTW 2,260,159 shares of a newly created series of preferred stock, the Series A non-voting convertible preferred stock, par value $0.0001 per share (“Series A Preferred Stock”) and 90,407 private placement warrants (“July 2024 Private Placement Warrants”) to purchase common stock, equal to the per share Public Offering (defined below) price for the shares of common stock and Public Offering Warrants (defined below) in the Public Offering (the “July 2024 Private Placement”). The Private Placement closed on July 1, 2024 with net proceeds received of $2.5 million after deducting offering costs of $0.2 million.

The July 2024 Private Placement Warrants met the definition of a derivative under ASC 815. The gross proceeds from the July 2024 Private Placement were first allocated to the July 2024 Private Placement Warrants based on its issue-date estimated fair value of $1.7 million. The July 2024 Private Placement Warrants are subsequently remeasured at their estimated fair value on a recurring basis at each reporting period date, with a gain or loss recognized within Other income (expense). The remaining gross proceeds of $1.0 million were allocated to the Series A Preferred Stock. Of the $0.2 million in offering costs, $0.1 million was recorded against the Series A Preferred Stock as a reduction of proceeds and $0.1 million was expensed as general and administrative expenses in the consolidated statement of operations and comprehensive loss.

On December 19, 2024, following the Series A Stockholder Approval (as defined below) and after giving effect to the Reverse Stock Split, the 2,260,159 shares of Series A Preferred Stock were converted to 90,407 shares of Common Stock.

The rights and preferences of the Series A Preferred Shares were as follows:

Voting Rights

The Series A Preferred Stockholders haveno voting rights.

Dividend Rights

The Series A Preferred Stock participates in dividends with Common Stock on an as-converted basis when declared by the Board of Directors. No dividends were declared through December 31, 2025.

Liquidation Preference

In the event of any voluntary or involuntary liquidation, dissolution, or winding-up of the Company, payment shall be made to the holders of shares of Series A Preferred Stock on a pari passu basis with all holders of Common Stock. Each Series A Preferred Stock holder shall be entitled to receive out of the assets, whether capital or surplus, of the Company the same amount that a holder of Common Stock would receive if such holder’s Series A Convertible Preferred Stock were fully converted to Common Stock plus an additional amount equal to any dividends declared but unpaid to such share.

Conversion Rights

Each share of Series A Preferred Stock is convertible after the date that the Company’s stockholders approve the conversion of the Series A Preferred Stock into shares of Common Stock in accordance with the listing rules of the NYSE (the “Series A Stockholder Approval”). Upon the Series A Stockholder Approval, each share of Series A Preferred Stock then outstanding shall automatically convert into (i) a number of shares of Common Stock equal to the number of Series A Preferred Stock outstanding at the time of conversion, adjustable for certain dilutive events, and (ii) pre-funded conversion warrants in the form agreed by the holder and the Company, exercisable for a number of shares of Common Stock equal to the number of Series A Preferred Stock outstanding at the time of conversion, adjustable for certain dilutive events. The Series A Stockholder Approval was received on December 16, 2024.

Redemption

Each share of Series A Preferred Stock outstanding on December 31, 2026 (the “Redemption Date”) shall be automatically redeemed by the Company for cash at a redemption price equal to the volume-weighted average price per share of the Common Stock on the NYSE during the twenty consecutive trading day period ending and including the trading day immediately preceding the Redemption Date (the “Redemption Price”). The Series A Preferred Stock is redeemable at a determinable price (the Redemption Price) on a fixed date (the Redemption Date), which results in mezzanine equity classification (outside of permanent equity) on the Company’s consolidated balance sheet.

Series B Preferred Stock

On November 11, 2025, the Company entered into a securities purchase and exchange agreement (the "Exchange Agreement") with certain entities managed by RTW, pursuant to which RTW has agreed to exchange all of the (i) principal amount of the RTW Convertible Notes, purchased pursuant to the terms of the Amended Note Purchase Agreement, including interest accrued on the RTW Convertible Notes; (ii) Company obligations under the Revenue Interest Financing Agreement; and (iii) Company obligations under the New RIFA, for shares of a newly issued series of Series B convertible preferred stock, par value $0.0001 per share ("Series B Preferred Stock") of the Company (the "Exchange").

The Charter authorizes the issuance of up to 100,000,000 shares of Allurion preferred stock. As of December 31, 2025, no shares of Allurion preferred stock were outstanding.

Common Equity

Allurion's Certificate of Incorporation authorizes the issuance of up to 1,000,000,000 shares of Allurion Common Stock. As of December 31, 2025 and 2024,12,279,181 and 2,710,607 shares of Common Stock were outstanding.

July 2024 Public Offering

On June 28, 2024, the Company entered into an underwriting agreement (the “Underwriting Agreement”) with Jefferies LLC and TD Securities (USA) LLC, as representative of the several underwriters (the “Underwriters”), pursuant to which the Company agreed to issue and sell 576,261 shares of the Company’s Common Stock and warrants (“Public Offering Warrants”) to purchase up to 576,261 shares of the Company’s Common Stock at an offering price of $30.00 per share and accompanying warrant (the “Public Offering”). The Public Offering closed on July 1, 2024 with net proceeds received of $15.2 million after deducting underwriting discounts of $1.0 million and offering costs of $1.0 million. The Underwriters fully exercised their option for additional Public Offering Warrants, with 86,440 additional Public Offering Warrants issued at closing, for a total of 662,701 Public Offering Warrants. Further, the Underwriters exercised a portion of the option with respect to the Common Stock (the “Share Overallotment”) on July 5, 2024 for net proceeds of $2.2 million, which resulted in the issuance of 77,091 shares of the Company’s Common Stock at an offering price of $30.00 per share.

The Public Offering Warrants met the definition of a derivative under ASC 815 and the Share Overallotment met the requirements for equity classification under ASC 815. The $17.4 million in net proceeds from the Public Offering and exercise of the Share Overallotment were first allocated to the Public Offering Warrants based on their issue-date estimated fair value of $13.2 million. The Public Offering Warrants are subsequently remeasured at their estimated fair value on a recurring basis at each reporting period date, with a gain or loss recognized within Other income (expense). The $0.8 million offerings costs allocated to the Public Offering Warrants were expensed as general and administrative expenses in the consolidated statement of operations and comprehensive loss. The remaining net proceeds of $5.1 million were allocated to Common Stock and APIC.

RTW Private Placement

On January 14, 2025, the Company entered into a subscription agreement (the “RTW Subscription Agreement”) with funds affiliated with RTW, pursuant to which the Company agreed to sell 841,751 shares of Common Stock at a purchase price of $2.97 per share (the “RTW Private Placement”). The RTW Private Placement closed on January 16, 2025 with net proceeds received of $2.5 million.

January 2025 Public Offering and Concurrent Private Placement

On January 24, 2025, the Company entered into a securities purchase agreement (the “January 2025 Securities Purchase Agreement”) with certain accredited investors named therein, pursuant to which the Company agreed to issue and sell 1,240,000 shares of Common Stock (the “January 2025 Offering”) and 1,240,000 accompanying common warrants (the “January 2025 Warrants”) to purchase up to 1,240,000 shares of Common Stock upon exercise of the January 2025 Warrants in a concurrent private placement (the “January 2025 Private Placement”), at an offering price of $6.00 per share and accompanying January 2025 Warrant. The January 2025 Offering and January 2025 Private Placement closed on January 27, 2025 with net proceeds of $5.8 million after deducting placement agent fees of $0.6 million and offering costs of $1.0 million.

Certain purchasers in the January 2025 Offering and January 2025 Private Placement are holders of warrants to purchase Common Stock issued in the Public Offering in July 2024. The exercise price for the Public Offering Warrants initially was $30.00 per share. In consideration for such purchasers’ purchase of securities in the January 2025 Offering and January 2025 Private Placement, we agreed with each such purchaser to seek stockholder approval to reduce the exercise price of the Public Offering Warrants held by such purchasers to $6.00 per share (the "January Warrant Repricing"). Such Public Offering Warrants will become exercisable at the revised exercise price upon the receipt of such stockholder approval, which approval was obtained on April 10, 2025. The Public Offering Warrants were remeasured to account for the incremental fair value, with the $0.5 million loss recognized within Other income (expense).

The January 2025 Warrants met the definition of a derivative under ASC 815. The $5.8 million in net proceeds were first allocated to the January 2025 Warrants based on their issue-date estimated fair value of $5.3 million. The January 2025 Warrants are subsequently remeasured at their estimated fair value on a recurring basis at each reporting period date, with a gain or loss recognized within Other income (expense). The $0.8 million of offering costs allocated to the January 2025 Warrants were expensed as general and administrative expenses in the condensed consolidated statement of operations and comprehensive loss. The remaining net proceeds of $1.3 million were allocated to Common Stock and APIC.

February 2025 Public Offering and Concurrent Private Placement and Leavitt Private Placement

On February 19, 2025, the Company entered into a securities purchase agreement (the “February 2025 Securities Purchase Agreement”) with certain accredited investors named therein, pursuant to which the Company agreed to issue and sell 900,000 shares of Common Stock (the “February 2025 Offering”), and 1,800,000 accompanying common warrants (the “February 2025 Warrants”) to purchase up to 1,800,000 shares of Common Stock upon exercise of the February 2025 Warrants in a concurrent private placement (the “February 2025 Private Placement”), at an offering price of $5.23 per share and accompanying February 2025 Warrant. The February 2025 Offering and February 2025 Private Placement closed on February 20, 2025 with net proceeds of $3.9 million after deducting placement agent fees of $0.4 million and offering costs of $0.4 million.

Additionally, on February 19, 2025, the Company entered into a subscription agreement (the “Leavitt Subscription Agreement”) with an accredited investor affiliated with Leavitt Equity Partners LLC (collectively, “Leavitt”), pursuant to which the Company agreed to issue and sell 267,686 shares of Common Stock (the “Private Placement Shares”) and common warrants to purchase up to 535,372 shares of Common Stock (the “Leavitt Private Placement Warrants” and together with the February 2025 Warrants, the “February 2025 Offering Warrants”), at a purchase price of $5.23 per share and accompanying Private Placement Warrant (the “Leavitt Private Placement”). The Leavitt Private Placement closed on February 20, 2025 with net proceeds of $1.3 million after deducting placement agent fees of $0.1 million. Leavitt is a holder of Public Offering Warrants with an initial exercise price of $30.00 per share. In consideration for Leavitt's purchase of securities in the Leavitt Private Placement, we agreed to seek stockholder approval to reduce the exercise price of the Public Offering Warrants held by Leavitt to $6.00 per share (the "February Warrant Repricing"). Such Public Offering Warrants will become exercisable at the revised exercise price upon the receipt of such stockholder approval, which approval was obtained on April 10, 2025. The Public Offering Warrants were remeasured to account for the incremental fair value, with the $0.2 million loss recognized within Other income (expense).

The February 2025 Offering Warrants met the definition of a derivative under ASC 815. The $5.2 million in net proceeds were first allocated to the February 2025 Offering Warrants based on their issue-date estimated fair value of $5.0 million. The February 2025 Offering Warrants are subsequently remeasured at their estimated fair value on a recurring basis at each reporting period date, with a gain or loss recognized within Other income (expense). The $0.4 million of offering costs allocated to the February 2025 Offering Warrants were expensed as general and administrative expenses in the condensed consolidated statement of operations and comprehensive loss. The remaining net proceeds of $0.6 million were allocated to Common Stock and APIC.

November 2025 PIPE

On November 11, 2025, the Company entered into a securities purchase agreement (the “November 2025 Securities Purchase Agreement”) with certain accredited investors named therein, pursuant to which the Company agreed to issue and sell 2,994,012 shares of Common Stock (the “November 2025 Offering”) and 2,994,012 accompanying common warrants (the “November 2025 Warrants”) to purchase up to 2,994,012 shares of Common Stock upon exercise of the November 2025 Warrants in a concurrent private placement (the “November 2025 Private Placement”), at an offering price of $1.67 per share and accompanying November 2025 Warrant. The November 2025 Offering and November 2025 Private Placement closed on November 12, 2025 with net proceeds of $4.5 million after deducting placement agent fees of $0.4 million and offering costs of $0.1 million.

The November 2025 Warrants met the definition of a derivative under ASC 815. The $5.0 million in gross proceeds were first allocated to the November 2025 Warrants based on their issue-date estimated fair value of $3.5 million. The November 2025 Warrants are subsequently remeasured at their estimated fair value on a recurring basis at each reporting period date, with a gain or loss recognized within Other income (expense). The $0.4 million of placement agent fees and offering costs allocated to the November 2025 Warrants were expensed as general and administrative expenses in the condensed consolidated statement of operations and comprehensive loss. The remaining net proceeds of $1.5 million were allocated to Common Stock and APIC.

The number of shares of Common Stock that have been reserved for issuance upon the potential conversion or exercise, as applicable, of the Company's securities as of December 31, 2025, is as follows:

Warrants to Purchase Common Stock

In connection with the closing of the Business Combination, all outstanding warrants to purchase Legacy Allurion preferred stock and Legacy Allurion common stock were converted into Rollover Warrants to purchase Allurion Common Stock using the Exchange Ratio. As of December 31, 2025, there were 14,380 Rollover Warrants outstanding to purchase Common Stock. Upon the closing of the Business Combination, certain Legacy Allurion preferred stock and Legacy Allurion common stock warrants that were converted into Rollover Warrants were determined to be equity classified.

In connection with the equity offerings defined above, the following warrants were outstanding to purchase Common Stock as of December 31, 2025:

In Compute Health's initial public offering, it sold units at a price of $10.00 per unit, which consisted ofone share of Class A Common Stock, $0.0001 par value, of Compute Health andone-half of a redeemable warrant (each a "Public Warrant"). On July 26, 2023, Compute Health's Public Warrant holders approved an amendment (the “Warrant Amendment”) to the warrant agreement that governed all Compute Health’s Public Warrants. Per the terms of the Warrant Amendment, upon completion of the Business Combination, each of the outstanding Compute Health Public Warrants became exercisable for 0.056818 shares of the Company’s Common Stock, par value $0.0001 per share, at an exercise price of $202.50 per share and each Compute Health Public Warrant was exchanged for 0.6125 (prior to giving effect to the Reverse Stock Split) Allurion Public Warrants in the Business Combination. The Public Warrants will expire August 1, 2030, seven years after the completion of the Business Combination, or earlier upon redemption or liquidation. As of December 31, 2025, the Company has not redeemed any of the outstanding Public Warrants. As of December 31, 2025, there were 13,206,720 outstanding Public Warrants exercisable for 750,383 shares of Allurion Common Stock.

Chardan Equity Facility

On December 18, 2023, we entered into a ChEF Purchase Agreement (the "Purchase Agreement") and a Registration Rights Agreement, each with Chardan Capital Markets ("Chardan") related to a "ChEF," Chardan's committed equity facility (the "Chardan Equity Facility"). Pursuant to the Purchase Agreement, the Company has the right from time to time at its option to sell to Chardan up to the lesser of (i) $100,000,000 in aggregate gross purchase price of newly issued shares of the Company's Common Stock, and (ii)379,299 shares of Common Stock, which number of shares is equal to 19.99% of the shares of the Common Stock outstanding immediately prior to the execution of the Purchase Agreement (the "Exchange Cap"). In consideration for Chardan’s entry into the Purchase Agreement, Allurion agreed to issue to Chardan 1,421 shares of Allurion Common Stock (the "Commitment Shares"). The Company recorded $0.1 million to additional paid-in capital and $0.1 million of expense in connection with the issuance of the Commitment Shares. The Company expensed an additional $0.1 million related to a non-refundable structuring fee (the "Structuring Fee") immediately following commencement. As of December 31, 2025, the Company had sold all shares registered under the Exchange Cap, or 377,879 shares of Common Stock, to Chardan at a purchase price of $1.8 million in connection with the Purchase Agreement.

On November 11, 2025, the Company entered into Exchange Agreement with certain entities managed by RTW, pursuant to which RTW has agreed to exchange all of the (i) principal amount of the RTW Convertible Notes, purchased pursuant to the terms of the Amended Note Purchase Agreement, including interest accrued on the RTW Convertible Notes; (ii) Company obligations under the Revenue Interest Financing Agreement; and (iii) Company obligations under the New RIFA, for shares of Series B Preferred Stock of the Company.

The Exchange Agreement contains customary representations, warranties and agreements by the Company, customary conditions to closing, certain obligations of the parties, and indemnification provisions. On December 18, 2025, the Company obtained stockholder approval of the issuance of the Series B Preferred Stock. RTW's obligation to consummate the closing of the Exchange is conditioned upon compliance with the listing requirements of the national securities exchange on which the Common Stock is then listed on.

The Exchange Agreement creates an obligation for the Company to issues shares of Series B Preferred Stock upon satisfaction of the closing conditions (the "Preferred Stock Forward Contract"). The Preferred Stock Forward Contract was determined to be an equity classified freestanding financial instrument in accordance with ASC 815-40 and ASC 480-10, respectively. Thefair value was determined as the fair value of the Series B Preferred Stock that will be issued less the fair value of RIFA and RTW Convertible

Notes. The fair value of the Series B Preferred Stock was performed using a scenario based approach, combining a DCF model with a MCSM valuation approach along with a risk free rate of 3.6% and volatility of 117.5%. See Note 9, Fair Value Measurements, for the valuation approaches for the RIFA and RTW Convertible Notes. As the fair value of the Series B Preferred Stock was less than the combined fair values of the RIFA and RTW Convertible Notes, the gain to the Company is recorded as contribution to capital due to the related party nature of the transaction. As such, there is no impact to APIC. As of the date these financial statements are issued, the Exchange has not occurred.

12. Net Loss per Share

Basic and diluted net loss per share was calculated as follows:

The Company’s potentially dilutive securities have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share. Therefore, the weighted average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. The Company excluded the following potential common shares, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:

13. Stock Based Compensation

Stock Incentive Plans

The Company’s 2010 Stock Option Plan (the “2010 Plan”) provided for the grant of qualified incentive stock options, nonqualified stock options, and other awards to the Company’s employees, officers, directors, advisors, and outside consultants to purchase the Company’s Common Stock. On December 11, 2020, the Company’s Board of Directors adopted the 2020 Stock Option Plan (the “2020 Plan”), which provided for the grant of qualified incentive stock options, nonqualified stock options, and other awards to the Company’s employees, officers, directors, advisors, and outside consultants to purchase the Company’s Common Stock. Each stock option from the 2010 Plan and the 2020 Plan that was outstanding immediately prior to the Business Combination, whether vested or unvested, was canceled and exchanged for a stock option to purchase Allurion Common Stock based on the Exchange Ratio. The per share exercise price for each stock option was divided by the Exchange Ratio.

Inconnection with the closing of the Business Combination, the Company adopted the 2023 Stock Option and Incentive Plan (the "2023 Plan"), which provides for the award of stock options (both incentive and non-qualified), stock appreciation rights, restricted stock units, restricted stock awards, cash-based awards, and dividend equivalent rights. On October 15, 2025 the Board voted to amend the 2023 Plan to the Amended and Restated 2023 Equity Incentive Plan (the "Amended 2023 Plan") to increase the aggregate number of shares of common stock issuable. The Amended 2023 Plan was approved by stockholders on December 18, 2025. As of December 31, 2025, a total of 4,066,122 shares of Allurion Common Stock are reserved for issuance under the Amended 2023 Plan. The Amended 2023 Plan provides that the number of shares reserved for issuance under the Amended 2023 Plan will automatically increase each January 1, beginning January 1, 2026 and ending January 1, 2035, by 5% of the number of fully diluted outstanding shares of Allurion Common Stock as of the immediately preceding December 31 or such lesser amount as determined by the Board and the Compensation Committee.

As of December 31, 2025, 639,471 options and RSUs were issued and outstanding under the 2010 Plan, 2020 Plan, 2023 Plan, and the Amended 2023 Plan. As of December 31, 2024,370,272 options and RSUs were issued and outstanding under the 2010 Plan, 2020 Plan, and 2023 Plan. The stock options generally vest over afour-year period and expire 10 years from the date of grant.

Stock-based compensation expense included in the consolidated statement of operations and comprehensive loss was as follows:

Stock Options

The following tables summarizes the option activity under the 2010 Plan, 2020 Plan, 2023 Plan, and the Amended 2023 Plan during the year ended December 31, 2025:

Total stock compensation expense related to stock option awards during the year ended December 31, 2025 was $1.9 million. As of December 31, 2025, there was approximately$2.0 million of unrecognized compensation costs related to unvested stock options granted under the 2010 Plan, 2020 Plan, 2023 Plan, and the Amended 2023 Plan, which is expected to be recognized over a weighted-average vesting term of 2.1 years. The weighted average grant-date fair value of the stock option awards granted during the years ended December 31, 2025 and 2024 was $1.50 and $32.46 per option, respectively.

The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model and the assumptions noted in the table below. Expected volatility for the Company’s Common Stock was determined based on an average of the historical volatility of a peer group of public companies which are similar to the Company. The expected term of options granted to employees was calculated using the simplified method, which represents the average of the contractual term of the option and the weighted- average vesting period of the option. The Company uses the simplified method because it does not have sufficient historical option exercise data to provide a reasonable basis upon which to estimate expected term. The expected term of options granted to non-employees is the remaining contractual term of the award. The assumed dividend yield is based upon the Company’s expectation of not paying dividends in the foreseeable future. The risk-free rate for periods within the expected life of the option is based upon the U.S. Treasury yield curve in effect at the time of grant.

The assumptions used in the Black-Scholes option-pricing model are as follows:

On December 18, 2025, our board of directors approved a stock option repricing (the "Option Repricing") to be effective on December 18, 2025 (the "Effective Date") in accordance with our 2023 Plan. Pursuant to the Option Repricing the exercise price of each stock option previously granted under the 2023 Plan, totaling 106,238 options, were amended to reduce the effective price of such options to $1.67 per share, the greater of the closing price of our common stock on the NYSE on the Effective Date, or the price per share of our common stock in any equity raise consummated prior to the Annual meeting. Under the terms of the Option Repricing, a repriced option will revert back to its original exercise price if, prior to the one-year anniversary of the Effective Date, (a) the option holder's employment is terminated by us with cause or by the option holder or (b) the option is exercised. The repriced options otherwise retained their existing terms and conditions as set forth in the 2023 Plan and applicable award agreements. The incremental stock compensation expense related to the Option Repricing was immaterial.

Restricted Stock Units

In December 2022, the Company issued RSUs to a member of the Board of Directors with vesting subject to both a performance-based closing condition dependent on the successful Business Combination with Compute Health and time-based vesting conditions which are fully vested as of December 31, 2025. In October 2023 and March 2024, the Company issued additional RSUs to Board of Director members and in November 2024 and May 2025, to employees and Board members, all of which vest over 2-3 years. Additionally, in April 2025, the Company issued performance share units ("PSU") to one of its employees. The PSUs granted by the Company vest in connection with the achievement of certain commercial milestones. The expense recognized for these awards is based on the probability of such achievement. The Company did not record any stock compensation expense related to employee PSUs for the year ended December 31, 2025.

The following table summarizes the restricted stock unit activity under the 2020 Plan and 2023 Plan during the year ended December 31, 2025:

Total stock compensation expense related to RSUs for the year ended December 31, 2025 was $1.2 million. As of December 31, 2025, there were $1.4 million of unrecognized compensation costs related to nonvested RSUs granted under the 2020 Plan and 2023 Plan, which is expected to be recognized over a remaining weighted-average vesting term of 3.9 years. The weighted average grant-date fair value of time-vested restricted stock units granted during the years ended December 31, 2025 and 2024 was $2.26 and $19.98 per share, respectively.

Employee Stock Purchase Plan

In connection with the closing of the Business Combination, the Company adopted the 2023 Employee Stock Purchase Plan (the "2023 ESPP"). Under the 2023 ESPP plan, substantially all employees may voluntarily enroll to purchase the Company's Common Stock through payroll deductions at a price equal to 85% of the lower of the fair market values of the stock as of the beginning or end of the offering period. An employee's payroll deductions under the 2023 ESPP are limited to 15% of the employee's compensation.

A total of 131,435 shares of the Company's Common Stock are reserved and authorized for issuance under the 2023 ESPP as of December 31, 2025. In addition, the number of shares of Common Stock available for issuance under the 2023 ESPP will automatically increase each January 1, beginning on January 1, 2024 and each January thereafter, by the lesser of (i)1% of the fully diluted outstanding shares of our Common Stock as of the immediately preceding December 31, (ii)64,000 shares of our Common Stock, or (iii) such lesser number of shares determined by the administrator of the 2023 ESPP. As of December 31, 2025, no shares have been issued under the 2023 ESPP.

14. Employee Benefit Plan

The Company has a 401(k) retirement plan that covers eligible U.S. employees. Eligible employees may elect to contribute up to the maximum limits, as set by the Internal Revenue Service, of their eligible compensation. The Company may elect to make a discretionary contribution or match a discretionary percentage of employee contributions. During the years ended December 31, 2025 and 2024, the Company’s matching contributions to the plan were less than $0.1 million for both periods.

15. Commitments and Contingencies

Leases

With respect to contracts involving the use of assets, if the Company has the right to direct the use of the asset and obtain substantially all economic benefits from the use of an asset, it accounts for the service contract as a lease.

As of December 31, 2025, the Company was a party to three different leases for office, manufacturing, and laboratory space under non-cancelable office leases in two cities. These leases total approximately 30,000 square feet and will expire between February 2026 and February 2028. The Company has aright to extend certain of these leases for periods between three andfive years. Under its real property leases, the Company pays base rent and a proportional share of operating expenses. Such operating expenses are subject to annual adjustment and are accounted for as variable payments in the period in which they are incurred. The Company also holds immaterial leases related to vehicles and office equipment.

In April 2024, the Company executed an amendment to one of its leases in Natick, Massachusetts. The amendment was accounted for as a modification of the existing lease agreement, with impacts to the lease term, lease payments, and related lease liability for the lease. As a result of this amendment, the lease in Natick expired in March 2025 and additional operating lease assets obtained in exchange for lease obligations were less than $0.1 million. In February 2024 and April 2025, the Company terminated each of its leases in Paris, France. Additionally, in June 2025, the Company executed an amendment to another one of its leases in Natick, Massachusetts. The amendment was accounted for as a modification of the existing lease agreement, with impacts to the lease term, lease payments, and related lease liability for the lease. As a result of this amendment, the lease in Natick will now expire in November 2028 and additional operating lease assets obtained in exchange for lease obligations were $0.4 million.

In July 2025, the Company signed an Assignment of Lease and Consent to Assignment (the "Lease Assignment") for one of its Natick leases ending March 2028, whereby a third-party agreed to assume the Company's rights, duties and obligations under the lease beginning September 1, 2025. The lease assignment was contingent upon the landlord's consent and the Company is secondarily liable to the third-party assignee for obligations under the lease. For the year ended December 31, 2025 the Company derecognized the related operating lease right-of-use asset and operating lease liability of $0.5 million and recognized a gain on lease termination of less than $0.1 million related to the Lease Assignment.

The components of right -of-use ("ROU") assets and lease liabilities are included in the consolidated balance sheets. The short-term portion of the Company's operating lease liability is recorded as part of Accrued expenses and other current liabilities on the consolidated balance sheets.

Aggregate Lease Information

Other pertinent lease information for the years ended December 31, 2025 and 2024 is as follows (in thousands):

Future commitments under non-cancelable operating lease agreements as of December 31, 2025 are as follows (in thousands):

The weighted-average remaining lease terms and discount rates related to our leases were as follows:

Product Liability

The Company has not received any material product liability claims. Notwithstanding this, the Company has obtained insurance related to potential product liability claims.

Litigation and Claims

In the normal course of operations, the Company may become involved in various claims and legal proceedings related to, for example, the validity or scope of its intellectual property rights, employee-related matters, securities class action, or adverse patient reactions. Additionally, during the normal course of business, the Company may be a party to legal claims that may not be covered by insurance.

On August 12, 2025, Vanderbilt University Medical Center (“Vanderbilt”) filed a complaint against the Company in the United States District Court for the Middle District of Tennessee, captioned Vanderbilt University Medical Center v. Allurion Technologies, Inc., d/b/a Allurion. Vanderbilt's complaint alleges that the Company breached the Clinical Trial Agreement, dated June 30, 2022, by and between the Company and Vanderbilt (the "Clinical Trial Agreement"), related to the clinical trial for the Smart Capsule by failing to reimburse medical expenses incurred in treating a patient enrolled in such trial at Vanderbilt. Vanderbilt is seeking damages of approximately $2.5 million.

As of December 31, 2025 and 2024, the Company has recorded accruals for the contractual obligations under the Clinical Trial Agreement with Vanderbilt.

French Regulatory Decision

On August 6, 2024, it was announced that the Agence Nationale de Sécurité du Médicament (“ANSM”), the French regulatory authority, had suspended sales of the Allurion Smart Capsule in France, and the Company withdrew the device from the French market. The Company implemented a remediation plan to reduce certain risks associated with the advertising, follow-up program, and adverse events for the Allurion Smart Capsule. For the year ended December 31, 2024, the Company recognized a reduction to revenues of $1.2 million for customer returns of the Allurion Balloon, and no sales to France during the second half of 2024. On February 12, 2025, ANSM cleared the Company to resume sales, effective immediately.

On August 29, 2024, we received a notice from the NYSE notifying us that as of August 29, 2024, we were not in compliance with the continued listing standard set forth in Section 802.01B of the NYSE’s Listed Company Manual (the “Minimum Market Capitalization Standard”) because our average market capitalization was less than $50.0 million over the consecutive 30 period ended August 29, 2024 and our last reported stockholders’ equity as of August 29, 2024 was less than $50.0 million. In accordance with applicable NYSE procedures, within 45 days of receipt of the notice, we submitted a plan to the NYSE advising it of outlining measures that would bring us into conformity with the Minimum Market Capitalization Standard within 18 months of receipt of the notice (the “Cure Period”). We submitted a business plan to the NYSE demonstrating our ability to regain compliance with the NYSE’s rules, which the NYSE has accepted, and as a result we are subject to quarterly monitoring for compliance with the business planand our common stock will continue to trade on the NYSE during the Cure Period, subject to our compliance with other NYSE continued listing requirements.

On March 2, 2026, Company announced that it received a letter (the “Delisting Notice”) from the staff of the NYSE indicating that the Company does not meet certain of the NYSE's continued listing standards as set forth in the Minimum Market Capitalization Standard The Company has a right to a review of this determination by a Committee of the Board of Directors of the Exchange (the “Committee”). The Company has appealed this delisting determination.

On March 6, 2026, the NYSE informed the Company that it has determined to commence proceedings to delist the Company’s Common Stock, and warrants to purchase 0.056818 shares of Common Stock, with an exercise price of $202.50 per share of Common Stock, as a result of the Company’s non-compliance with Rule 802.01B of the NYSE Listed Company Manual that requires listing companies to maintain an average global market capitalization of at least $15 million over a period of 30 consecutive trading days. Trading in the Common Stock on the NYSE was suspended after market close on March 6, 2026. The Company has appealed this delisting determination. If the Company is unsuccessful in its appeal, the Company expects the NYSE will file a Form 25 with the SEC, which would result in the delisting of the Company’s Common Stock and Warrants from the NYSE on the tenth day after the Form 25 is filed.

As a result of the suspension in trading and delisting process pending the Company’s appeal, the Common Stock is trading on the OTCID Market. The Company intends to apply to list on a higher-tier market operated by the OTC Market Group, Inc. under its current symbols "ALUR" and “ALUR.WS”.

16. Segment Information

Segment reporting is prepared on the same basis that the Company'schief executive officer, who is our chief operating decision maker (“CODM”), manages the business, makes operating decisions, and assesses performance. The Company operates inone segment. We have selected net income (loss) as our reported measure of profit or loss because it is regularly provided to our CODM, allows our CODM to make decisions on resource allocations, and allows our CODM to assess performance of the business.

Disclosures about significant segment expenses and long-lived assets by geography are presented below. Refer to Note 3, Revenue, for information on revenue by geography.

Significant segment expenses are set forth in the following table (in thousands):

(1) Other segment items included in Net loss primarily include changes in fair value of warrant liabilities, changes in fair value of debt, changes in fair value of the Revenue Interest Financing, loss on extinguishment of debt, interest expense, and other income.

Long-lived assets, consisting of property and equipment, net and ROU assets by geography were as follows (in thousands):

17. Related-party Transactions

Lease Agreement with Related Party

In August 2022, the Company entered into an operating lease agreement for additional office space in Paris, France with LNMP JPBC Invest. The Company’s then-Trade Marketing Director was the signor of this lease for LNMP JPBS Invest. Additionally, the Company’s former Chief Commercial Officer is also a partner of LNMP JPBC Invest. The lease agreement included lease payments of approximately $0.1 million per year. The lease commenced August 1, 2022 through July 31, 2025. The Company concluded that the commercial terms of the lease agreement were competitive, at the current market rate and conducted at arm’s-length. This lease was terminated in February 2024.

Convertible Note Agreement with RTW

Pursuant to the Amended Note Purchase Agreement, on April 16, 2024, we issued and sold $48.0 million aggregate principal amount of convertible notes to RTW. RTW holds more than 5% of our outstanding Common Stock, has the right to designate an independent director nominee to be elected by our stockholders, is entitled to designate one representative to serve as a non-voting observer on our Board, and has the right to approve an additional director nominee for election. In September 2024, we expanded our Board and appointed a new director in satisfaction of certain of these obligations to RTW as set forth in the Amended Note Purchase Agreement. Refer to Note 7, Debt, for additional information regarding the RTW Convertible Notes.

RTW Participation in Public Offering

In connection with the Public Offering, the Company issued and sold 9,594 shares of Common Stock and accompanying warrants to funds affiliated with RTW, for an aggregate purchase price of approximately $0.3 million. The Public Offering closed on July 1, 2024.

Private Placement with RTW

On June 28, 2024, pursuant to the Subscription Agreement, the Company agreed to sell to RTW 2,260,159 shares of Series A Preferred Stock (as converted to 90,407 shares of Common Stock on December 19, 2024 following the Series A Stockholder Approval and after giving effect to the Reverse Stock Split), and 90,407 Private Placement Warrants, for an aggregate purchase price of approximately $2.7 million. The Private Placement closed on July 1, 2024.

Exercise of PIPE Conversion Option and New RIFA with RTW

On October 22, 2024, funds affiliated with RTW provided notice to the Company of their election of the PIPE Conversion Option under the Amended and Restated RTW Side Letter, to surrender 30,000 shares of Common Stock of the Company representing $7.5 million in consideration for an additional Revenue Interest Financing Agreement. Accordingly, on October 30, 2024, the Company and the funds affiliated with RTW entered into the New RIFA. The New RIFA has substantially identical terms and conditions as the Revenue Interest Financing Agreement except that the amount of financing provided under the New RIFA is equal to the conversion amount of $7.5 million.

January 2025 Private Placement with RTW

On January 14, 2025, the Company entered into the RTW Subscription Agreement with funds affiliated with RTW, pursuant to which the Company agreed to sell 841,751 shares of Common Stock at a purchase price of $2.97 per share. The January 2025 Private Placement closed on January 16, 2025 with net proceeds received of $2.5 million.

Second Amendment to Amended Note Purchase Agreement

On April 15, 2025, the Company, the Purchasers and RTW, as agent for the Purchasers entered into the Second Amendment to Note Purchase Agreement, which amended the Amended Note Purchase Agreement to reflect additional conversion and other provisions, including provisions permitting the conversion of the RTW Convertible Notes at reduced conversion prices, resulting in the potential issuance of additional shares, which had been approved by the Company’s stockholders at the Special Meeting of Stockholders held on April 10, 2025. On April 16, 2025, subject to the terms of the Second Amendment to Note Purchase Agreement, the Purchasers provided notice of conversion of $5.0 million of principal amount of the RTW Convertible Notes, for an aggregate of 1,492,539 shares of Common Stock. Additionally, on November 4, 2025, RTW provided notice of conversion of an additional $5.0 million of principal amount of the RTW Convertible Notes, for an aggregate of 1,492,539 shares of Common Stock.

On November 11, 2025, the Company entered into the Exchange Agreement with RTW. Refer to Note 11, Capital Stock and Stockholders Deficit, for more information regarding the Exchange Agreement. As of December 31, 2025, the Exchange has not occurred.

November 2025 Private Placement with RTW

On November 11, 2025, the Company entered into the RTW Subscription Agreement with funds affiliated with RTW, pursuant to which the Company agreed to sell 1,856,288 shares of Common Stock at a purchase price of $1.67 per share. The November 2025 Private Placement closed on November 11, 2025 with gross proceeds received from RTW of $3.1 million.

18. Subsequent Events

On February 20, 2026, the U.S. Food and Drug Administration (“FDA”) granted PMA approval for the Allurion Gastric Balloon System (AGBS), featuring the Allurion Smart Capsule. In the United States, the AGBS is indicated to promote short-term limited weight loss in adult individuals with obesity between the ages of 22 years and 65 years with a body mass index (BMI) ≥ 30 kg/m2 and ≤ 40 kg/m2 who have had at least one unsuccessful attempt at a weight loss program. The residence time for each balloon is variable with an average observed residence time of 15.3 weeks. The AGBS is to be used in conjunction with a moderate intensity lifestyle modification therapy program. The AGBS consists of up totwo Allurion Balloons placed during a 10-month period.

On February 24, 2026, the Company entered into a warrant exercise inducement offer letter (the “Inducement Letter”) with certain holders (the “Exercising Holders”) of certain of the Company’s: (i) January 2025 Warrants; (ii) February 2025 Offering Warrants; and (iii) November 2025 Private Placement Warrants (together with the January 2025 Warrants and February 2025 Offering Warrants, the “Existing Warrants”).

Pursuant to the terms of the Inducement Letter, the Company agreed to amend the Existing Warrants by lowering the exercise price of the Existing Warrants to $1.15 per share. Additionally, the Exercising Holders agreed to exercise for cash certain of their Existing Warrants to purchase an aggregate of 2,659,565 shares of Common Stock in exchange for the Company’s agreement to issue to such Exercising Holder new warrants (the “New Warrants”) to purchase up to an aggregate of 5,319,130 shares of Common Stock. The Company received aggregate gross proceeds of $3.1 million from the exercise of the Existing Warrants by the Exercising Holders.

Each New Warrant is exercisable into shares of Common Stock at a price per share of $1.15, will initially be exercisable following stockholder approval (the “Initial Exercise Date”), and will expire on thefive-year anniversary of the Initial Exercise Date. Subject to limited exceptions, a holder of New Warrants will not have the right to exercise any portion of its New Warrants if the holder (together with such holder’s affiliates, and any persons acting as a group together with such holder or any of such holder’s affiliates) would beneficially own a number of shares of Common Stock in excess of 4.99% (or 9.99% at the Existing Holders’ option).

The Company has engaged Roth Capital Partners, LLC (“Roth”) as its financial advisor in connection with these transactions and will pay Roth a fee equal to 5.0% of its gross proceeds from the exercise of the Existing Warrants. The Company also agreed to pay Roth up to $40,000 for fees and expenses of legal counsel and other out-of-pocket expenses.