7. Debt

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 to zero in connection with the repayment of the Fortress Term Loan, with a corresponding $2.0 million gain recorded in other 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%.

RTW Convertible Notes

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

the substantive 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.