10-Q/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q/A

(Amendment No. 1)

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2024

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _________________ to _________________

Commission File Number: 001-41767

Allurion Technologies, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware	92-2182207
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
11 Huron Drive Natick, MA	01760
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (508) 647-4000

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.0001 per share	ALUR	The New York Stock Exchange
Warrants to purchase 0.056818 shares of Common Stock for $202.50 per share	ALUR WS	The New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of August 9, 2024, the registrant had 64,348,508 shares of common stock, $0.0001 par value per share, outstanding.

EXPLANATORY NOTE

This Amendment No. 1 on Form 10-Q/A (“Form 10-Q/A”) amends and restates certain items in Allurion Technologies, Inc.'s (the “Company”) Quarterly Report on Form 10-Q as of and for the fiscal quarter ended June 30, 2024, initially filed with the Securities and Exchange Commission (the "SEC") on August 14, 2024 (the "Original Form 10-Q").

In this Form 10-Q/A, the Company is restating its previously issued unaudited condensed consolidated financial statements for the fiscal quarter ended June 30, 2024, as further described below.

In addition, the Company previously filed (i) Amendment No. 1 to its Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (together with the 2023 Form 10-K/A, the “Annual Reports”) with the SEC on August 19, 2025 to restate its previously issued audited consolidated financial statements as of and for the fiscal year ended December 31, 2024, (ii) Amendment No. 2 to its Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as amended, (the “2023 Form 10-K/A”), with the SEC on August 28, 2025 to restate its previously issued audited consolidated financial statements as of and for the fiscal year ended December 31, 2023, (iii) Amendment No. 1 to its Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2024 (the “Q1 2024 Form 10-Q/A”), with the SEC on August 28, 2025 to restate its previously issued unaudited condensed consolidated financial statements for the quarter ended March 31, 2024 and (iv) Amendment No. 1 to its Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2025 (the “Q1 2025 Form 10-Q/A”) with the SEC on August 19, 2025, to restate its previously issued unaudited condensed consolidated financial statements for the quarter ended March 31, 2025. Further the Company is filing an amendment to its Quarterly Report on Form 10-Q for the quarter ended September 30, 2024 (together with this Form 10-Q/A, the Q1 2024 Form 10-Q/A and the Q1 2025 Form 10-Q/A, the “Quarterly Reports”) to restate its previously issued unaudited consolidated financial statements for the fiscal quarter ended September 30, 2024.

The Company does not intend to amend any other reports previously filed with the SEC. Accordingly, investors and other readers should rely only on the financial information and related disclosures regarding the periods described above (the “Affected Periods”) in this Form 10-Q/A, such amendments to the Annual and Quarterly Reports described in the preceding paragraph, and in any other future filings with the SEC (as applicable) and should not rely on the prior reports of its independent registered public accounting firm on the consolidated financial statements as of and for the years ended December 31, 2023 and 2024, as applicable, or any previously furnished or filed reports, press releases, investor presentations or similar communications relating to the Affected Periods.

In addition to the restatement discussed above, the Company effected a 1-to-25 reverse stock split on January 3, 2025 (the “Reverse Stock Split”). As such, the Company has retrospectively adjusted Part I - Item 1, Financial Statements and Part I - Item 2, Management's Discussion and Analysis of Financial Condition and Results of Operations to reflect the effects of the Reverse Stock Split. No other items in this Form 10-Q/A were adjusted as a result of the Reverse Stock Split.

Items Amended in this Filing

This Form 10-Q/A amends and restates the following items of the Original Form 10-Q:

•Part I - Item 1. Financial Statements

•Part I - Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

•Part I - Item 4. Controls and Procedures

•Part II - Item 6. Exhibits

In accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the certifications specified in Rule 13a-14 under the Exchange Act from the Company’s Chief Executive Officer, dated as of the date hereof, are being filed or furnished, as applicable, with this Form 10-Q/A as Exhibits 31.1 and 32.1. This Form 10-Q/A also includes an updated signature page.

This Form 10-Q/A sets forth the information in the original Form 10-Q in its entirety, as such information is modified and superseded where necessary to reflect the restatement, Reverse Stock Split (with respect to Items 1 and 2 only) and related revisions. Except as provided above, this Form 10-Q/A does not amend, update or change any other items or disclosures or otherwise reflect events occurring after the date of the Original Form 10-Q to the date this Form 10-Q/A is filed. As such, forward-looking statements included in this Form 10-Q/A may represent management’s views as of the date of the Original Form 10-Q and should not be assumed to be accurate as of any date thereafter. Accordingly, this Form 10-Q/A should be read in conjunction with the Company’s other SEC filings.

Restatement Background

As described in the Company’s Current Report on Form 8-K filed with the SEC on August 14, 2025, while preparing its unaudited condensed consolidated financial statements for the quarter ended June 30, 2025, the Company identified an error (the "Error") in the Company’s historical consolidated financial statements as of and for the years ended December 31, 2023 and

i

December 31, 2024, and the quarter and year-to-date periods ended March 31, 2024, June 30, 2024, September 30, 2024, and March 31, 2025 that caused both overstatements and understatements of Other comprehensive income (loss) as reflected in the consolidated statements of comprehensive income (loss), Other income (expense) as reflected in the consolidated statements of operations, Net income (loss) as reflected in the consolidated statements of comprehensive loss and consolidated statements of operations, and Accumulated other comprehensive income (loss) and Accumulated deficit as reflected in the consolidated balance sheets and consolidated statements of stockholders' deficit. The Company determined that the Error originated from the existing material weakness related to the lack of sufficient levels of staff with public company and technical accounting experience to maintain proper control activities and perform risk assessment and monitoring activities. These adjustments were inadvertently booked in the wrong direction consistently since the fourth quarter of 2023. The Error had no impact to revenue, gross profit, operating expenses, operating profit (loss) or cash and cash equivalents.

Additionally, the Company corrected an item that was previously identified and concluded as an immaterial error to its condensed consolidated financial statements for the six months ended June 30, 2024. This item primarily relates to Other liabilities and Other income (expense) misclassifications.

As a result, the Company is restating the unaudited condensed consolidated financial statements as of and for the fiscal quarter ended June 30, 2024.

Internal Control Considerations

Following the identification of the Error and in connection with the restatement, the Company's management has re-evaluated the effectiveness of the Company's disclosure controls and procedures and internal control over financial reporting as of June 30, 2024. The Company's management determined that the Error and the related restatements were the result of material weaknesses in the Company’s internal control over financial reporting. As a result, the Company's management has concluded that the Company’s disclosure controls and procedures were not effective as of June 30, 2024. The Company's management concluded the Error and restatement were symptomatic of the existing material weaknesses in the Company's disclosure controls and procedures, which were previously concluded to be ineffective as of June 30, 2024. See Part I - Item 4. Controls and Procedures, in this Form 10-Q/A for additional information related to these material weaknesses in internal control over financial reporting and the related remedial measures.

ii

Table of Contents

		Page
PART I.	FINANCIAL INFORMATION	1
Item 1.	Financial Statements (Unaudited)	1
	Condensed Consolidated Balance Sheets (Restated)	1
	Condensed Consolidated Statements of Operations (Restated)	2
	Condensed Consolidated Statements of Comprehensive Income (Loss) (Restated)	4
	Condensed Consolidated Statements of Stockholders’ Deficit (Restated)	5
	Condensed Consolidated Statements of Cash Flows (Restated)	6
	Notes to Unaudited Condensed Consolidated Financial Statements (Restated)	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	41
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	56
Item 4.	Controls and Procedures	56
PART II.	OTHER INFORMATION	58
Item 1.	Legal Proceedings	58
Item 1A.	Risk Factors	58
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	64
Item 3.	Defaults Upon Senior Securities	64
Item 4.	Mine Safety Disclosures	64
Item 5.	Other Information	64
Item 6.	Exhibits	65
Signatures		67

iii

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q/A contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements include, but are not limited to, statements regarding the plans, strategies and prospects, both business and financial, of Allurion Technologies, Inc. (“Allurion”, the "Company", "we", "our", or "us"). These statements are based on the beliefs and assumptions of the management of Allurion. Although Allurion believes that its plans, intentions and expectations reflected in or suggested by these forward-looking statements are reasonable, Allurion cannot assure you that it will achieve or realize these plans, intentions or expectations. Forward-looking statements are inherently subject to risks, uncertainties and assumptions. Generally, statements that are not historical facts, including statements concerning possible or assumed future actions, business strategies, events, or results of operations, are forward-looking statements. These statements may be preceded by, followed by or include the words “believes”, “estimates”, “expects”, “projects”, “target”, “goal”, “forecasts”, “may”, “will”, “potential”, “should”, “would”, “could”, “future”, “seeks”, “plans”, “predicts”, “propose”, “scheduled”, “anticipates”, “intends”, or similar expressions.

Forward-looking statements in this Quarterly Report on Form 10-Q/A include, but are not limited to, statements about the ability of Allurion to:

•realize the benefits expected from the business combination (the “Business Combination”) between Allurion and Compute Health Acquisition Corp. (“Compute Health”) pursuant to that certain Business Combination Agreement, dated as of February 9, 2023 (as amended, the “Business Combination Agreement”), by and among Allurion, Allurion Technologies, LLC, which was previously known as Allurion Technologies Opco, Inc. (formerly Allurion Technologies, Inc.) prior to the consummation of the Business Combination (“Legacy Allurion”), Compute Health, Compute Health Corp., (“Merger Sub I”) and Compute Health LLC (“Merger Sub II” and, together with Merger Sub I, the “Merger Subs”);

•successfully defend litigation that may be instituted against Allurion;

•manage various conflicts of interest that could arise among us or our affiliates, investors, directors, and officers;

•successfully deploy our cash and cash equivalents and proceeds from the Chardan Equity Facility (as defined herein);

•maintain the listing of Allurion securities on the New York Stock Exchange (“NYSE”), and the potential liquidity and trading of such securities;

•achieve the benefits of the collaboration with Medtronic plc;

•acquire sufficient sources of funding if and when needed;

•attract and retain key employees, officers, and directors;

•implement and achieve business plans, forecasts, and other expectations, including any financial projections provided to PIPE Investors (as defined herein) in connection with the Business Combination, the Purchasers in connection with the RTW Convertible Notes (as defined herein), and the investors in the Equity Offering (as defined herein), and identify and realize additional opportunities;

•manage risks associated with the management of Allurion having limited experience operating as a public company;

•commercialize current and future products and services and create sufficient demand among health care providers and patients for such products;

•successfully complete current and future preclinical studies and clinical trials of the swallowable, procedure-less intragastric balloon for weight loss developed by Allurion (the “Allurion Balloon”) and any other future product candidates;

•obtain market acceptance of the Allurion Balloon as safe and effective;

•cost-effectively sell existing and future products through existing distribution arrangements with distributors and/or successfully adopt a direct sales force as part of a hybrid sales model that includes both distributors and a direct sales effort;

•timely collect accounts receivable from our customers;

•obtain regulatory approval or clearance in the U.S. and certain non-U.S. jurisdictions for current and future products and maintain previously obtained approvals and/or clearances in those jurisdictions where products and services are currently offered;

iv

•successfully complete remediation programs to resume sales of the Allurion Balloon in France and any other country that suspends sales of our products;

•accurately forecast customer demand and manufacture sufficient quantities of products that patients and health care providers request;

•successfully compete in the highly competitive and rapidly changing regulated industries in which Allurion operates, and effectively address changes in such industries, including changes in competitors’ products and services and changes in the laws and regulations that affect Allurion;

•successfully manage any future international expansion of Allurion’s business and navigate business, regulatory, political, operational, financial, and economic risks associated with doing business internationally;

•successfully manage any future growth in Allurion’s business;

•contract with third-party suppliers and providers and monitor their ability to perform adequately under those arrangements;

•comply with applicable legal and regulatory obligations;

•obtain and maintain intellectual property protection for Allurion’s products and technologies and acquire or license (on commercially reasonable terms) intellectual property from third parties;

•sell products, and use proprietary technologies, without infringing, misappropriating, or otherwise violating the proprietary rights or intellectual property of third parties;

•manage the impact of any significant acquisitions, dispositions, and other similar or material transactions;

•the restatement of our prior financial statements and our ability to implement and maintain effective internal controls over financial reporting, including our ability to remediate the existing material weaknesses in our internal controls;

•manage the effects of natural disasters, terrorist attacks, the spread and/or abatement of infectious diseases such as COVID-19, and the occurrence of other events beyond our reasonable control, including with respect to potential operational disruptions, labor disruptions, increased costs, and impacts to demand related thereto, on the ability to implement business plans, forecasts, and other expectations; and

•other factors detailed under the section entitled “Risk Factors.”

We have based the forward-looking statements contained in this Quarterly Report on Form 10-Q/A primarily on our current expectations and projections about future events and trends that we believe may affect our business, financial condition, results of operations, prospects, business strategy, and financial needs. The outcome of the events described in these forward-looking statements is subject to risks, uncertainties, assumptions and other factors described under the heading "Risk Factors" in this Quarterly Report on Form 10-Q/A and in the section entitled “Risk Factors” within our Annual Report on Form 10-K filed with the SEC on March 26, 2024, as amended by Amendment No. 1 to the Annual Report on Form 10-K filed with the SEC on April 28, 2024 and Amendment No. 2 to the Annual Report on Form 10-K filed with the SEC on August 28, 2025 (collectively, the "Annual Report on Form 10-K"). These risks are not exhaustive. Other sections of this Quarterly Report on Form 10-Q/A include additional factors that could adversely impact our business and financial performance. Moreover, Allurion operates in very competitive and rapidly changing environments. New risks and uncertainties emerge from time to time and it is not possible for us to predict all risks and uncertainties that could have an impact on the forward-looking statements contained in this Quarterly Report on Form 10-Q/A. We cannot assure you that the results, events and circumstances reflected in the forward-looking statements will be achieved or occur, and actual results, events or circumstances could differ materially from those described in the forward-looking statements.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this Quarterly Report on Form 10-Q/A, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and such statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as may be required under applicable securities laws.

v

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements.

ALLURION TECHNOLOGIES, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(dollars in thousands, except share amounts)

	June 30, 2024			December 31, 2023
	(Restated)			(Restated)
Assets
Current assets:
Cash and cash equivalents	$	19,258		$	38,037
Accounts receivable, net of allowance of doubtful accounts of $11,363 and    $12,671, respectively		13,357			18,194
Inventory, net		4,788			6,171
Prepaid expenses and other current assets		2,902			2,414
Total current assets		40,305			64,816
Property and equipment, net		3,254			3,381
Right-of-use asset		2,481			3,010
Other long-term assets		510			505
Total assets	$	46,550		$	71,712
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	7,984		$	10,379
Current portion of term loan		—			38,643
Current portion of lease liabilities		850			908
Accrued expenses and other current liabilities		14,724			15,495
Total current liabilities		23,558			65,425
Public warrant liabilities		2,113			5,943
Revenue Interest Financing liability		39,000			36,200
Earn-out liabilities		4,110			23,990
Convertible notes payable		40,950			—
Lease liabilities, net of current portion		1,788			2,306
Other liabilities		5,613			9,145
Total liabilities		117,132			143,009
Commitments and Contingencies (Note 17)
Stockholders’ deficit:
Preferred stock, $0.0001 par value — 100,000,000 shares authorized as of June 30, 2024; and no shares issued and outstanding as of June 30, 2024 and December 31, 2023		—			—
Common stock, $0.0001 par value — 1,000,000,000 shares authorized as of June 30, 2024; and 1,918,927 and 1,907,529 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively		2			2
Additional paid-in capital		144,771			143,010
Accumulated other comprehensive loss		5,980			700
Accumulated deficit		(221,335	)		(215,009	)
Total stockholders’ deficit		(70,582	)		(71,297	)
Total liabilities and stockholders’ deficit	$	46,550		$	71,712

The accompanying notes are an integral part of these consolidated financial statements.

1

ALLURION TECHNOLOGIES, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(dollars in thousands, except per share amounts)

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Revenue	$	11,766		$	12,960		$	21,152		$	27,031
Cost of revenue		2,773			2,992			5,293			5,932
Gross profit		8,993			9,968			15,859			21,099
Operating expenses:
Sales and marketing		6,718			10,273			12,863			22,137
Research and development		4,310			6,581			10,035			14,433
General and administrative		7,311			6,408			13,697			11,714
Total operating expenses:		18,339			23,262			36,595			48,284
Loss from operations		(9,346	)		(13,294	)		(20,736	)		(27,185	)
Other income (expense):
Interest expense		(339	)		(2,508	)		(2,270	)		(4,745	)
Changes in fair value of warrants		1,376			(204	)		4,507			(1,679	)
Changes in fair value of debt		8,070			2,257			8,070			2,257
Changes in fair value of Revenue Interest Financing and PIPE Conversion Option		(5,994	)		—			(8,094	)		—
Changes in fair value of earn-out liabilities		5,690			—			19,880			—
Loss on extinguishment of debt		(8,713	)		—			(8,713	)		—
Termination of convertible note side letters		—			(8,134	)		—			(8,134	)
Other income (expense), net		999			(91	)		1,171			(255	)
Total other income (expense):		1,089			(8,680	)		14,551			(12,556	)
Loss before income taxes		(8,257	)		(21,974	)		(6,185	)		(39,741	)
Provision for income taxes		(65	)		(22	)		(141	)		(56	)
Net loss		(8,322	)		(21,996	)		(6,326	)		(39,797	)
Cumulative undeclared preferred dividends		—			(725	)		—			(1,442	)
Net loss attributable to common shareholders	$	(8,322	)	$	(22,721	)	$	(6,326	)	$	(41,239	)
Net loss per share
Basic and Diluted	$	(4.34	)	$	(20.95	)	$	(3.30	)	$	(38.05	)
Weighted-average shares outstanding
Basic and Diluted		1,917,872			1,084,300			1,914,527			1,083,897

The accompanying notes are an integral part of these consolidated financial statements.

2

3

ALLURION TECHNOLOGIES, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(dollars in thousands)

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Net Income (loss)	$	(8,322	)	$	(21,996	)	$	(6,326	)	$	(39,797	)
Other comprehensive loss:
Change in fair value of Revenue Interest Financing due to change in credit risk		3,000			—			5,200			—
Change in fair value of RTW Convertible Notes due to change in credit risk		80			—			80			—
Comprehensive Loss	$	(5,242	)	$	(21,996	)	$	(1,046	)	$	(39,797	)

The accompanying notes are an integral part of these consolidated financial statements.

4

ALLURION TECHNOLOGIES, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ DEFICIT

(dollars in thousands, except share amounts)

	Common Stock				Additional Paid-		Accumulated Other		Accumulated			Stockholders’
	Shares		Amount		in Capital		Comprehensive Loss		Deficit			Deficit
Balance as of January 1, 2023		1,083,196		1		99,877		—		(132,192	)		(32,314	)
Exercise of stock options		616		—	20			—		—			20
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants		143		—		29		—		—			29
Stock-based compensation expense		—		—	409			—		—			409
Net loss		—		—		—		—		(17,801	)		(17,801	)
Balance as of March 31, 2023		1,083,955		1		100,335		—		(149,993	)		(49,657	)
Exercise of stock options		1,106		—		28		—		—			28
Issuance of Legacy convertible preferred stock for the exercise of warrants		20		—		6		—		—			6
Stock-based compensation expense		—		—		401		—		—			401
Net loss				—				—		(21,996	)		(21,996	)
Balance as of June 30, 2023		1,085,081		1		100,770		—		(171,989	)		(71,218	)
Balance as of January 1, 2024 (Restated)		1,907,529		2		143,010		700		(215,009	)		(71,297	)
Exercise of stock options		186		—	9			—		—			9
Issuance of common stock for the exercise of Public Warrants		6		—		—		—		—			—
Issuance of common stock from equity line financing (Note 13)		5,730		—		378		—		—			378
Issuance of common stock in connection with vesting of RSU awards		2,505		—		—		—		—			—
Stock-based compensation expense		—		—		552		—		—			552
Other comprehensive loss (Restated)		—		—		—		2,200		—			2,200
Net income (Restated)		—		—		—		—		1,996			1,996
Balance as of March 31, 2024 (Restated)		1,915,956		2		143,949		2,900		(213,013	)		(66,162	)
Exercise of stock options		460		—		16		—		—			16
Issuance of common stock in connection with vesting of RSU awards		2,505		—		—		—		—			—
Issuance of common stock for the exercise of Public Warrants		6		—		1		—		—			1
Stock-based compensation expense		—		—		805		—		—			805
Other comprehensive loss (Restated)		—		—		—		3,080		—			3,080
Net loss (Restated)		—		—		—		—		(8,322	)		(8,322	)
Balance as of June 30, 2024 (Restated)		1,918,927		2		144,771		5,980		(221,335	)		(70,582	)

The accompanying notes are an integral part of these consolidated financial statements.

5

ALLURION TECHNOLOGIES, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(dollars in thousands)

	Six Months Ended June 30,
	2024			2023
	(Restated)
Operating Activities:
Net income (loss)	$	(6,326	)	$	(39,797	)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash lease expense		362		416
Depreciation and amortization		564		399
Stock-based compensation		1,357		810
Provision for uncollectible accounts		—			2,885
Unrealized exchange (gain) or loss		373			49
Provision for inventory		369			469
Change in fair value of warrant liabilities		(4,507	)		1,679
Change in fair value of derivative liabilities		(1,895	)	35
Change in fair value of Revenue Interest Financing and PIPE Conversion Option		8,094			—
Change in fair value of earn-out liabilities		(19,880	)		—
Interest paid on debt recorded at fair value		(1,054	)		—
Change in fair value of debt		(8,070	)		(2,257	)
Debt issuance costs associated with debt recorded at fair value		1,357			—
Non-cash interest expense		1,464		775
Non-cash termination of convertible note side letters		—			6,632
Loss on term loan extinguishment		8,713		0
Changes in operating assets and liabilities:
Accounts receivable		4,412			930
Inventory		1,014			(1,468	)
Prepaid expenses, other current and long-term assets		718			634
Lease liabilities		(411	)		(391	)
Accounts payable		(2,504	)		5,021
Accrued expenses and other current liabilities		(1,713	)		3,162
Net cash used in operating activities	$	(17,563	)	$	(20,017	)
Investing Activities:
Purchases of property and equipment		(539	)		(408	)
Net cash used in investing activities	$	(539	)	$	(408	)
Financing Activities:
Proceeds from issuance of convertible notes		48,000			19,550
Proceeds from option and warrant exercises		26			61
Proceeds from equity line financing		378			—
Repayment of convertible notes		—			(500	)
Payment of deferred financing costs		—			(1,604	)
Payment of debt issuance costs		(1,357	)		—
Repayment of Fortress term loan		(47,720	)		—
Net cash provided by (used in) financing activities	$	(673	)	$	17,507
Net decrease in cash and cash equivalents and restricted cash	$	(18,775	)	$	(2,918	)
Cash and cash equivalents and restricted cash at beginning of period		38,421			8,023
Cash and cash equivalents and restricted cash at end of period	$	19,646		$	5,105
Supplemental disclosure of cash flow information
Cash paid for interest	$	2,672		$	3,967
Supplemental cash flow information on non-cash investing and financing activities
Purchase of property and equipment included in accounts payable	$	31		$	165
Deferred financing costs in accounts payable and accrued expenses		1,207			6,918
Change in fair value of RTW Convertible Notes through OCI		80			—
Change in fair value of Revenue Interest Financing through OCI		5,200			—

6

The accompanying notes are an integral part of these consolidated financial statements.

7

ALLURION TECHNOLOGIES, INC. AND SUBSIDIARIES

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):

	June 30, 2024		December 31, 2023
Cash and cash equivalents	$	19,258	$	38,037
Restricted cash included in other long-term assets		388		384
Cash and cash equivalents and restricted cash shown in the statement of cash flows	$	19,646	$	38,421

The accompanying notes are an integral part of these consolidated financial statements.

8

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™ Balloon. The Allurion Balloon 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 Balloon 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 Balloon, referred to as the “Allurion Program”. The base tier of the VCS is free of charge to those purchasing the Allurion Balloon, 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, Hong Kong, 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”). Allurion shares 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. As a result of this retrospective application, certain prior period balances within the condensed consolidated financial statements have changed. Refer to Note 4, Business Combination for further discussion regarding the closing of the Business Combination with Compute Health.

Unless otherwise indicated, references in this Quarterly Report on Form 10-Q/A to the "Company", "our", and "Allurion" refer to the condensed 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.

9

Basis of Presentation

The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. 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"). They should be read in conjunction with our audited financial statements as of and for the year ended December 31, 2023 included in the Company's Annual Report on Form 10-K, as amended by Amendment No. 1 to the Annual Report on Form 10-K filed with the SEC on April 28, 2024 and Amendment No. 2 to the Annual Report on Form 10-K filed with the SEC on August 28, 2025 (collectively, the"Annual Report on Form 10-K"). The financial statements as of June 30, 2024 and for the three and six months ended June 30, 2024 and 2023 presented in this report are unaudited; however, in the opinion of management such financial statements reflect all adjustments, consisting solely of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods presented. The results of operations for the periods presented are not necessarily indicative of the results that might be expected for future interim periods or for the full year.

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. A loss from remeasurement of $0.4 million and gain from remeasurement of less than $0.1 million for the six months ended June 30, 2024 and 2023, respectively, and losses from remeasurement of $0.1 million each of the three months ended June 30, 2024 and 2023, are recorded in the statements of operations within Other income (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 three and six months ended June 30, 2024 and 2023.

Reverse Stock Split

The Company held its annual meeting of stockholders on December 16, 2024 (the “Annual Meeting”), and upon the recommendation of the Board of Directors (the “Board”) of the Company, the Company’s stockholders approved a certificate of amendment to the Company’s Amended and Restated Certificate of Incorporation (as amended and restated from time to time, the "Charter") to effect a reverse stock split of the Company’s Common Stock at a ratio between 1-for-10 and 1-for-25, with the final ratio to be determined by the Board in its sole discretion.

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 to its Charter 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 resulted, among other changes to the convertible note terms, 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 resulted, among other changes to the warrant terms, 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 25 shares of Common Stock that may be purchased pursuant to the exercise of public warrants will represent one 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 following the Reverse Stock Split is exercisable for 0.056818 shares of Common Stock at an exercise price of $202.50 per share, which is based on each public warrant being exercisable for 1.420455 shares of Common Stock before the Reverse Stock Split, adjusted for the 25:1 reverse stock split ratio.

10

Unless otherwise indicated, all authorized, issued, and outstanding shares and per share amounts contained in the accompanying condensed consolidated financial statements have been adjusted to reflect the 1-for-25 Reverse Stock Split for all periods presented. As a result, net income per share was also retrospectively adjusted for periods ended prior to the Reverse Stock Split.

Going Concern

The Company has evaluated whether there are certain 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 interim condensed consolidated financial statements are issued.

The Company has incurred recurring losses since inception, anticipates net losses and negative operating cash flows for the near future, and may be unable to remain in compliance with certain financial covenants required under its credit facilities. Through June 30, 2024, the Company has funded its operations primarily with proceeds from the sale of its convertible preferred stock, issuance of convertible notes, issuance of term loans, and funds received upon consummation of the Business Combination. The Company has incurred recurring losses and cash outflows from operating activities since its inception, including losses from operations of $20.7 million and $27.2 million and cash outflows from operating activities of $17.6 million and $20.0 million for the six months ended June 30, 2024 and 2023, respectively. As of June 30, 2024, the Company had an accumulated deficit of $221.3 million (as restated). The Company expects to continue to generate significant operating losses for the foreseeable future.

Based on the Company's recurring losses from operations incurred since inception, its expectation of continuing operating losses for the foreseeable future, the potential need to raise additional capital to finance its future operations, and the potential of being unable to remain in compliance with certain financial covenants under its credit facilities, the Company has concluded that there is substantial doubt about its ability to continue as a going concern for a period of one year from the date that these condensed consolidated financial statements are issued. The accompanying unaudited condensed consolidated financial statements have been prepared assuming that the Company will continue as a going concern, which contemplates the realization of assets and the settlement of liabilities and commitments in the normal course of business.

2. Restatement of Previously Issued Condensed Consolidated Financial Statements

While preparing its unaudited condensed consolidated financial statements for the quarter ended June 30, 2025, the Company identified an error (the "Error") in the Company’s historical consolidated financial statements as of and for the years ended December 31, 2023 and 2024, and the quarter and year-to-date periods ended March 31, 2024, June 30, 2024, September 30, 2024 and March 31, 2025, that caused both overstatements and understatements of Other comprehensive income (loss) as reflected in the consolidated statements of comprehensive income (loss), Other income (expense) as reflected in the consolidated statements of operations, Net income (loss) as reflected in the consolidated statements of comprehensive loss and consolidated statements of operations, and Accumulated other comprehensive income (loss) and Accumulated deficit as reflected in the consolidated balance sheets and consolidated statements of stockholders' deficit. The Company determined that the Error originated from the existing material weakness related to the lack of sufficient levels of staff with public company and technical accounting experience to maintain proper control activities and perform risk assessment and monitoring activities. These adjustments were inadvertently booked in the wrong direction consistently since the fourth quarter of 2023. The Error had no impact to revenue, gross profit, operating expenses, operating loss, or cash and cash equivalents.

Additionally, the Company corrected an item that was previously identified and concluded as an immaterial error to its condensed consolidated financial statements for the six months ended June 30, 2024. This item primarily relates to Other liabilities and Other income (expense) misclassifications.

As a result, the Company is restating the unaudited condensed consolidated financial statements as of and for the fiscal quarter ended June 30, 2024.

11

The effects of the restatements on the condensed consolidated financial statements as of and for the three and six months ended June 30, 2024 are as follows:

Restated Condensed Consolidated Balance Sheet

(dollars in thousands)

	As of June 30, 2024
	As Reported			Adjustment			As Restated
Assets
Current assets:
Cash and cash equivalents	$	19,258		$	—		$	19,258
Accounts receivable, net of allowance of doubtful accounts		13,357			—			13,357
Inventory, net		4,788			—			4,788
Prepaid expenses and other current assets		2,902			—			2,902
Total current assets		40,305			—			40,305
Property and equipment, net		3,254			—			3,254
Right-of-use asset		2,481			—			2,481
Other long-term assets		510			—			510
Total assets	$	46,550		$	—		$	46,550
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	7,984		$	—		$	7,984
Current portion of lease liabilities		850			—			850
Accrued expenses and other current liabilities		14,724			—			14,724
Total current liabilities		23,558			—			23,558
Public warrant liabilities		2,113			—			2,113
Revenue Interest Financing liability		39,000			—			39,000
Earn-out liabilities		4,110			—			4,110
Convertible notes payable		40,950			—			40,950
Lease liabilities, net of current portion		1,788			—			1,788
Other liabilities		5,613			—			5,613
Total liabilities		117,132			—			117,132
Commitments and Contingencies
Stockholders’ deficit:
Preferred stock, $0.0001 par value — 100,000,000 shares authorized as of June 30, 2024; and no shares issued and outstanding as of June 30, 2024		—			—			—
Common stock, $0.0001 par value — 1,000,000,000 shares authorized as of June 30, 2024; and 1,918,927 shares issued and outstanding as of June 30, 2024		2			—			2
Additional paid-in capital		144,771			—			144,771
Accumulated other comprehensive income (loss)		(5,980	)		11,960			5,980
Accumulated deficit		(209,375	)		(11,960	)		(221,335	)
Total stockholders’ deficit		(70,582	)		—			(70,582	)
Total liabilities and stockholders’ deficit	$	46,550		$	—		$	46,550

12

Restated Condensed Consolidated Statement of Operations

(dollars in thousands)

	Three months ended June 30, 2024									Six months ended June 30, 2024
	As Reported			Adjustment			As Restated			As Reported			Adjustment			As Restated
Revenue	$	11,766		$	—		$	11,766		$	21,152		$	—		$	21,152
Cost of revenue		2,773			—			2,773			5,293			—			5,293
Gross profit		8,993			—			8,993			15,859			—			15,859
Operating expenses:
Sales and marketing		6,718			—			6,718			12,863			—			12,863
Research and development		4,310			—			4,310			10,035			—			10,035
General and administrative		7,311			—			7,311			13,697			—			13,697
Total operating expenses:		18,339			—			18,339			36,595			—			36,595
Loss from operations		(9,346	)		—			(9,346	)		(20,736	)		—			(20,736	)
Other income (expense):
Interest expense		(339	)		—			(339	)		(2,270	)		—			(2,270	)
Changes in fair value of warrants		1,376			—			1,376			4,507			—			4,507
Changes in fair value of debt		8,230			(160	)		8,070			8,230			(160	)		8,070
Changes in fair value of Revenue Interest Financing and PIPE Conversion Option		6			(6,000	)		(5,994	)		1,496			(9,590	)		(8,094	)
Changes in fair value of earn-out liabilities		5,690			—			5,690			19,880			—			19,880
Loss on extinguishment of debt		(8,713	)		—			(8,713	)		(8,713	)		—			(8,713	)
Other income (expense), net		999			—			999			1,171			—			1,171
Total other income (expense):		7,249			(6,160	)		1,089			24,301			(9,750	)		14,551
Income (loss) before income taxes		(2,097	)		(6,160	)		(8,257	)		3,565			(9,750	)		(6,185	)
Provision for income taxes		(65	)		—			(65	)		(141	)		—			(141	)
Net income (loss)	$	(2,162	)	$	(6,160	)	$	(8,322	)	$	3,424		$	(9,750	)	$	(6,326	)
Net income (loss) per share
Basic	$	(1.13	)	$	(3.21	)	$	(4.34	)	$	1.79		$	(5.09	)	$	(3.30	)
Diluted	$	(1.13	)	$	(3.21	)	$	(4.34	)	$	1.67		$	(4.97	)	$	(3.30	)
Weighted-average shares outstanding
Basic		1,917,872			—			1,917,872			1,914,527			—			1,914,527
Diluted		1,917,872			—			1,917,872			1,959,881			(45,354	)		1,914,527

Restated Condensed Consolidated Statement of Comprehensive Income

(dollars in thousands)

	Three months ended June 30, 2024									Six months ended June 30, 2024
	As Reported			Adjustment			As Restated			As Reported			Adjustment			As Restated
Net income (loss)	$	(2,162	)	$	(6,160	)	$	(8,322	)	$	3,424		$	(9,750	)	$	(6,326	)
Other comprehensive loss:
Change in fair value of Revenue Interest Financing due to change in credit risk		(3,000	)		6,000		$	3,000			(5,200	)		10,400			5,200
Change in fair value of RTW Convertible Notes due to change in credit risk		(80	)		160		$	80			(80	)		160			80
Comprehensive Income (loss)	$	(5,242	)	$	—		$	(5,242	)	$	(1,856	)	$	810		$	(1,046	)

13

Restated Condensed Consolidated Statement of Cash Flows

(dollars in thousands)

	Six Months Ended June 30, 2024
	Originally Reported			Adjustment			As Restated
Operating Activities:
Net income (loss)	$	3,424		$	(9,750	)	$	(6,326	)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash lease expense		362			—		362
Depreciation and amortization		564			—		564
Stock-based compensation		1,357			—			1,357
Unrealized exchange (gain) or loss		373			—			373
Provision for inventory		369			—			369
Change in fair value of warrant liabilities		(4,507	)		—			(4,507	)
Change in fair value of derivative liabilities		(1,895	)		—			(1,895	)
Change in fair value of Revenue Interest Financing and PIPE Conversion Option		(1,496	)		9,590			8,094
Change in fair value of earn-out liabilities		(19,880	)		—			(19,880	)
Interest paid on debt recorded at fair value		(1,054	)		—			(1,054	)
Change in fair value of debt		(8,230	)		160			(8,070	)
Debt issuance costs associated with debt recorded at fair value		1,357			—			1,357
Non-cash interest expense		1,464			—			1,464
Loss on term loan extinguishment		8,713			—			8,713
Changes in operating assets and liabilities:					—
Accounts receivable		4,412			—			4,412
Inventory		1,014			—			1,014
Prepaid expenses, other current and long-term assets		718			—			718
Lease liabilities		(411	)		—			(411	)
Accounts payable		(2,504	)		—			(2,504	)
Accrued expenses and other current liabilities		(1,713	)		—			(1,713	)
Net cash used in operating activities	$	(17,563	)	$	—		$	(17,563	)
Investing Activities:
Purchases of property and equipment		(539	)		—			(539	)
Net cash used in investing activities	$	(539	)	$	—		$	(539	)
Financing Activities:
Proceeds from issuance of convertible notes		48,000			—			48,000
Proceeds from option and warrant exercises		26			—			26
Proceeds from equity line financing		378			—			378
Repayment of convertible notes		—			—			—
Payment of deferred financing costs		—			—			—
Payment of debt issuance costs		(1,357	)		—			(1,357	)
Repayment of Fortress term loan		(47,720	)		—			(47,720	)
Net cash provided by (used in) financing activities	$	(673	)	$	—		$	(673	)
Net decrease in cash and cash equivalents and restricted cash		(18,775	)		—			(18,775	)
Cash and cash equivalents and restricted cash at beginning of period		38,421			—			38,421
Cash and cash equivalents and restricted cash at end of period	$	19,646		$	—		$	19,646
Supplemental disclosure of cash flow information
Cash paid for interest	$	2,672		$	—		$	2,672
Supplemental cash flow information on non-cash investing and financing activities							0
Purchase of property and equipment included in accounts payable	$	31		$	—		$	31
Deferred financing costs in accounts payable and accrued expenses		1,207			—			1,207
Change in fair value of RTW Convertible Notes through OCI		—			80			80
Change in fair value of Revenue Interest Financing through OCI		(5,280	)		10,480			5,200

14

The impacts of the restatements have been reflected throughout these condensed consolidated financial statements, including Notes 9, 10, 11, 12, 14, and 18.

3. Summary of Significant Accounting Policies

There have been no significant changes, except as described below, to the significant accounting policies disclosed in Note 3 of the “Notes to Consolidated Financial Statements” to the consolidated audited financial statements as of and for the year ended December 31, 2023 included in our Annual Report on Form 10-K.

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 condensed 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.

RTW Convertible Notes

The Company accounted for the RTW Convertible Notes (defined below) under the fair value options ("FVO") election of ASC Topic 825, Financial Instruments ("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 condensed 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.

Reclassification of Prior Year Presentation

Certain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no effect on the reported results of operations. Adjustment has been made to the condensed consolidated statement of operations for the three and six months ended June 30, 2023, to present the change in fair value of derivative liabilities as part of Other income (expense), net. This amount was a separate line item in prior years.

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 three and six months ended June 30, 2024 and 2023 or accounts receivable, net balance as of June 30, 2024 and December 31, 2023. The following table presents customers that represent 10% or more of the Company’s total revenue and accounts receivable, net:

	Revenue		Revenue		Accounts Receivable
	Three Months Ended June 30,		Six Months Ended June 30,		June 30,			December 31,
	2024	2023	2024	2023	2024			2023
Customer A	N/A	N/A	N/A	N/A		12	%		16	%

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.

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Recently Adopted Accounting Pronouncements

In August 2020, the FASB issued ASU 2020-06, Debt with Conversion and Other Options and Derivatives and Hedging—Contracts in Entity’s Own Equity, which simplifies the accounting for convertible instruments. The guidance removes certain accounting models which separate the embedded conversion features from the host contract for convertible instruments. The Company adopted ASU 2020-06 effective January 1, 2024 under the modified retrospective method of transition approach. The adoption of ASU 2020-06 did not have an impact on the Company’s condensed consolidated financial statements.

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires disclosure of incremental segment information on an interim and annual basis. The Company adopted ASU 2023-07 effective January 1, 2024 under the retrospective method. We have disclosed significant segment expenses, other segment items, and our measure of segment profit or loss in Note 18, Segment Information.

Recently Issued Accounting Pronouncements Not Yet Adopted

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires 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. This ASU is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial statements and related disclosures.

4. Business Combination

As discussed in Note 1, Organization and Basis of Presentation, on August 1, 2023 the Company consummated the Business Combination with Compute Health pursuant to the Business Combination Agreement. The Business Combination was accounted for as a reverse capitalization in accordance with U.S. GAAP. Under this method of accounting, Compute Health, which was the legal acquirer, was treated as the “acquired” company for financial reporting purposes. Accordingly, the Business Combination was treated as the equivalent of Allurion issuing stock for the net assets of Compute Health, accompanied by a recapitalization.

Upon the closing of the Business Combination, (a) holders of Legacy Allurion common stock received shares of Allurion Common Stock in an amount determined by application of the Exchange Ratio of approximately 0.9780, (the Exchange Ratio established in the Business Combination is prior to the Reverse Stock Split and did not change as a result of the Reverse Stock Split) (b) each then-outstanding share of Legacy Allurion preferred stock was converted into the right to receive shares of Allurion Common Stock equal to the number of shares of Legacy Allurion common stock that would be issued upon conversion of such outstanding share of Legacy Allurion preferred stock based on the applicable conversion ratio multiplied by the Exchange Ratio, (c) each then-outstanding and unexercised Legacy Allurion option was converted into a new Allurion option on the same terms and conditions as were applicable to such Legacy Allurion option based on the Exchange Ratio ("Rollover Option"), (d) each then-outstanding Legacy Allurion warrant was converted into a new Allurion warrant based on the Exchange Ratio ("Rollover Warrant"), (e) each then-outstanding Legacy Allurion restricted stock unit was converted into a rollover restricted stock unit based on the Exchange Ratio, and (f) certain amounts of loans made by Compute Health Sponsor LLC (the "Sponsor") to CPUH, which balance was $3.7 million at the time of the Business Combination (the "Sponsor Loan Excess"), were converted into 21,023 shares of Allurion Common Stock (as adjusted for the Reverse Stock Split) (the "Sponsor Loan Equity Issuance"). For periods prior to the Business Combination, the reported share and per share amounts have been retroactively converted by applying the Exchange Ratio. The consolidated assets, liabilities, and results of operations prior to the Business Combination are those of Legacy Allurion.

Further, upon the closing of the Business Combination and after giving effect to the Reverse Stock Split, each then-outstanding share of Compute Health Class A common stock was canceled and extinguished and was converted into the right to receive 0.056818 shares of Allurion Common Stock. Additionally, the Company assumed 13,206,922 outstanding public warrants to purchase an aggregate 750,394 shares of Allurion Common Stock at $202.50 per share.

In connection with the Business Combination, the Company incurred approximately $22.7 million of transaction costs, consisting of legal and other professional fees, of which $15.2 million was recorded to additional paid-in capital as a reduction of proceeds, $2.5 million was recorded as debt issuance costs in connection with the Fortress Term Loan (as defined below), and $5.0 million was recorded as an expense in general and administrative expenses on the condensed consolidated statement of operations and comprehensive loss. Of the $5.0 million recorded as general and administrative expenses, $3.6 million relates to a one-time insurance payment related to any potential matters that might arise from the period prior to the Business Combination, and as such is not

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capitalized as an asset. An additional $1.2 million relates to direct costs and fees incurred as part of the Revenue Interest Financing with RTW.

The following table reconciles the elements of the Business Combination to the condensed consolidated statement of cash flows and the condensed consolidated statement of changes in equity:

	December 31, 2023
Cash – CPUH trust (net of redemptions)	$	38,395
Cash – PIPE Investors		37,922
Gross Proceeds		76,317
Less: transaction costs paid		(14,665	)
Net proceeds from the Business Combination		61,652
Less: warrant liabilities assumed		(13,762	)
Less: repayment of note assumed in the Business Combination		(2,500	)
Less: accrued transaction costs at December 31, 2023		(580	)
Business Combination, net of transaction costs	$	44,810

The number of shares of Allurion Common Stock outstanding immediately following the consummation of the Business Combination and after giving effect to the Reverse Stock Split was as follows:

	Common Stock
Legacy Allurion Equityholders (1)		1,115,896
CPUH Stockholders (2)		206,628
Shares Issued to PIPE Investors (2)		215,468
Shares issued to RTW and Fortress (3)		76,000
Shares issued to convertible note holders		132,049
CPUH Sponsor Shares (2)		130,509
Side Letter Termination Shares (3)		15,508
Total shares of Common Stock immediately after    Business Combination		1,892,058

(1) Consists of Legacy Allurion common stock and Legacy Allurion preferred stock, plus the issuance of common stock in connection with the vesting of RSUs at closing, less the Gaur Trust Contributed Shares (as defined below).

(2) The CPUH Stockholders shares, PIPE shares, and CPUH Sponsor shares are presented combined within the condensed consolidated statements of stockholders deficit on the "Reverse recapitalization, net of transaction costs" line, which is less the Gaur Trust Contributed Shares (as defined below).

(3) The shares issued to RTW and Fortress and the Side Letter Termination shares are presented combined within the condensed consolidated statements of stockholders deficit on the "Derecognition of liabilities associated with the Backstop Shares, Hunter shares, and additional RTW and Fortress shares and issuance of related shares" line.

PIPE Investment

In connection with the execution of the Business Combination Agreement, Allurion and Compute Health entered into subscription agreements, each dated February 9, 2023 (the “PIPE Subscription Agreements”), with certain accredited investors and qualified institutional buyers (the “PIPE Investors”), pursuant to which, upon the terms and subject to the conditions set forth therein, the PIPE Investors, among other things, purchased an aggregate of 215,468 shares of Allurion Common Stock at a purchase price of $176.00 per share (other than as set forth in the Amended and Restated RTW Side Letter, as defined below), for an aggregate purchase price of $37.9 million, following the CPUH Merger Effective Time (the "PIPE Investment").

Revenue Interest Financing Agreement, Side Letter and PIPE Conversion Option

On February 9, 2023, concurrently with the execution of the Business Combination Agreement, the Company entered into the Revenue Interest Financing Agreement (the "Revenue Interest Financing Agreement") with certain entities that engaged RTW Investment, LP (together with its affiliates, "RTW") as investment manager. Pursuant to the Revenue Interest Financing Agreement, 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. The Revenue Interest Financing Agreement was amended pursuant to the RIFA Amendment (as

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defined below) 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. Refer to Note 10, Revenue Interest Financing, Side Letter, and PIPE Conversion Option below for further discussion on the Revenue Interest Financing.

Additionally, in connection with the Company entering in the Revenue Interest Financing, the Company, Compute Health, Legacy Allurion, Merger Sub II and RTW entered into a side letter (the "RTW Side Letter") on February 9, 2023 under which RTW may elect to convert up to $7.5 million of its initial PIPE Investment into an additional revenue interest financing by forfeiting a number of shares of Allurion Common Stock acquired by its PIPE Investment. Refer to Note 10, Revenue Interest Financing, Side Letter, and PIPE Conversion Option below for further discussion on the Revenue Interest Financing.

On May 2, 2023, the parties amended and restated the RTW Side Letter (as amended, the "Amended and Restated RTW Side Letter"), in connection with the Backstop Agreement (defined below), pursuant to which, among other things, Allurion issued 10,000 shares of Allurion Common Stock to RTW immediately prior to the Intermediate Merger Effective Time.

Fortress Credit Agreement

In connection with the closing of the Business Combination, the Company entered into a term loan facility (the “Fortress Term Loan”) pursuant to a Credit Agreement and Guaranty, dated as of August 1, 2023 (the “Fortress Credit Agreement”), with Fortress Credit Corp. (“Fortress”), as administrative agent for the lenders party thereto from time to time (the “Lenders”). Under the terms of the Fortress Term Loan, we borrowed $60.0 million which was used to repay the outstanding principal, accrued and unpaid interest, and other obligations with respect to the 2021 Term Loan (as defined below). Additionally, per the terms of the Fortress Term Loan and Backstop Agreement, Allurion issued an aggregate of 38,000 shares of Allurion Common Stock to an affiliate of Fortress pursuant to a subscription agreement between Allurion and such affiliate. Refer to Note 9, Debt for further discussion on the Fortress Term Loan.

Backstop Agreement

On May 2, 2023, CFIP2 ALLE LLC, an affiliate of Fortress Credit Corp., and RTW (collectively, the “Backstop Purchasers”), Legacy Allurion, Allurion and Hunter Ventures Limited (“HVL”) entered into the backstop agreement (the “Backstop Agreement”). Pursuant to the Backstop Agreement, immediately prior to the Intermediate Merger Closing, (a) each Backstop Purchaser purchased $2 million of the aggregate principal amount outstanding of HVL's Legacy Allurion Convertible Note issued in February 2023, (b) Allurion canceled the existing HVL Legacy Allurion Convertible Note and issued a new Allurion Convertible Note to HVL for the remaining balance together with all unpaid interest accrued since the date of issuance thereof, (c) Allurion issued new Allurion Convertible Notes to each Backstop Purchaser with an issuance date of August 1, 2023 and an original principal amount of $2 million each and (d) Allurion issued 28,000 shares of Allurion Common Stock to each Backstop Purchaser. Refer to Note 9, Debt for further discussion around the Backstop Agreement.

HVL Termination Agreement

On May 2, 2023, HVL and Legacy Allurion entered into a letter agreement (the “HVL Termination Agreement”), terminating the side letter agreement entered into between Legacy Allurion and HVL in connection with the issuance of HVL’s Legacy Allurion convertible note on February 15, 2023. Pursuant to the HVL Termination Agreement, among other things, at the closing of the Business Combination, upon the terms and subject to the conditions set forth therein, Allurion issued to HVL 15,508 shares of Allurion Common Stock. Refer to Note 9, Debt for further discussion regarding the HVL Termination Agreement.

Gaur Contribution Agreement

On May 2, 2023, Shantanu K. Gaur and Neha Gaur, trustees of The Shantanu K. Gaur Revocable Trust of 2021 (the “Gaur Trust”) and Allurion entered into a contribution agreement (the “Gaur Contribution Agreement”), pursuant to which, among other things, upon the terms and subject to the conditions set forth therein, the Gaur Trust contributed to Allurion, as a contribution of capital, 3,170 shares of Allurion Common Stock (the “Gaur Trust Contributed Shares”). The Gaur Trust’s contribution of the Gaur Trust Contributed Shares was effective immediately following the consummation of the Business Combination and the issuance of shares of Allurion Common Stock to the Gaur Trust pursuant to the terms of the Business Combination Agreement.

RSU Forfeiture Agreement

On May 2, 2023, Krishna Gupta, a member of our Board of Directors, entered into a letter agreement with Legacy Allurion (the “RSU Forfeiture Agreement”), pursuant to which, among other things, upon the terms and subject to the conditions set forth therein, Mr. Gupta agreed to forfeit 3,170 restricted stock units of Allurion (the “Forfeited RSUs”). The Forfeited RSUs were terminated and cancelled without consideration therefor immediately following the closing of the Business Combination Agreement.

Sponsor Contribution Agreement

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On May 2, 2023, the Sponsor and Compute Health entered into a letter agreement (the "Sponsor Contribution Agreement") pursuant to which, among other things, upon the terms and subject to the conditions set forth therein, the Sponsor agreed to contribute to Compute Health, as a contribution of capital, 161,379 shares of Compute Health Class A Common Stock (“Sponsor Contributed Shares”), prior to giving effect to the Reverse Stock Split. The Sponsor’s contribution of the Sponsor Contributed Shares was made immediately following the CPUH Recapitalization (defined below) and immediately prior to the CPUH Merger Effective Time.

Sponsor Support Agreement

On February 9, 2023, Allurion entered into a support agreement (the "Sponsor Support Agreement"), pursuant to which immediately prior to the CPUH Merger Effective time, (a) the Sponsor recapitalized each of the Sponsor’s 21,442,500 shares of Compute Health Class B Common Stock, and all 12,833,333 of the Sponsor’s warrants to purchase shares of Class A Common Stock, into 2,088,327 shares of Compute Health Class A Common Stock and (b) the additional Class B Holders set forth on Schedule I of the Sponsor Support Agreement (the "Additional Class B Holders") recapitalized his or her 30,000 shares of Compute Health Class B Common Stock into 21,120 shares of Compute Health Class A Common Stock (the "CPUH Recapitalization"). Subsequently, at the CPUH Merger Effective Time, each such share of Compute Health Class A Common Stock was converted into shares of Allurion Common Stock at an exchange ratio of 1.420455 (the "CPUH Exchange Ratio").

Conversion of Convertible Notes

In connection with the closing of the Business Combination, outstanding Legacy Allurion Convertible Notes with an aggregate principal amount together with accrued but unpaid interest of approximately $21.8 million were converted into 132,049 shares of Allurion Common Stock with a corresponding recognition of additional paid-in capital ("APIC") of $25.6 million provided for under the terms of such Legacy Allurion Convertible Notes, and are no longer outstanding. Refer to Note 9, Debt for further information on the Company's convertible notes.

Public Warrants and Warrant Amendment

In connection with the closing of the Business Combination, 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 below). The total value of the liability associated with the Public Warrants was $13.8 million measured at fair value based on the public warrant quoted price. The Company concluded the 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. As such, they have been classified as a liability on the balance sheet. See Note 13, Capital Stock and Stockholders Deficit and Note 11, Fair Value Measurements for further information on the Public Warrants and Warrant Amendment.

Earn-Out Liabilities

In connection with 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 Company accounts for the potential issuance of the Earn-Out Shares as a contingent consideration arrangement, which was initially valued and recorded at $53.0 million. See Note 11, Fair Value Measurements for further information on the earn-out liabilities.

5. Revenue

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

	Three Months Ended June 30,
	2024		2023
France	$	1,866	$	1,258
Spain		1,450		896
All Other Countries		8,450		10,806
Total Revenues	$	11,766	$	12,960

For the three months ended June 30, 2024, $3.6 million of revenue was generated in five countries included within All Other Countries in the table above, representing approximately 31% of Total Revenues, with each country responsible for approximately 4% to 8% of the total. Remaining revenue was generated by sales in 40 other countries included within All Other Countries. For the three months ended June 30, 2023, $4.4 million of revenue was generated in five countries included within All Other Countries, representing approximately 35% of Total Revenues, with each country responsible for approximately 4% to 9% of the total. Remaining revenue was generated by sales in 40 other countries included within All Other Countries.

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	Six Months Ended June 30,
	2024		2023
France	$	3,536	$	3,113
Spain		2,562		2,520
United Kingdom		2,173		2,257
All Other Countries		12,881		19,141
Total Revenues	$	21,152	$	27,031

For the six months ended June 30, 2024, $5.4 million of revenue was generated in five countries included within All Other Countries in the table above, representing approximately 26% of Total Revenues, with each country responsible for approximately 3% to 8% of the total. Remaining revenue was generated by sales in 45 other countries included within All Other Countries. For the six months ended June 30, 2023, $7.7 million of revenue was generated in five countries included within All Other Countries, representing approximately 29% of Total Revenues, with each country responsible for approximately 4% to 8% of the total. Remaining revenue was generated by sales in 48 other countries included within All Other Countries. No revenue was generated in the United States for the three and six months ended June 30, 2024.

6. Inventory

Inventory consists of the following (in thousands):

	June 30, 2024		December 31, 2023
Finished goods	$	2,760	$	3,427
Work in progress		767		967
Raw materials		1,261		1,777
Total Inventory	$	4,788	$	6,171

Inventory is stated net of $0.3 million and less than $0.1 million for the provision for excess and obsolete inventory as of June 30, 2024 and December 31, 2023, respectively.

7. Property and Equipment, net

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

	Estimated Useful Life (in Years)	June 30, 2024			December 31, 2023
Computers and purchased software	3	$	618		$	618
Leasehold improvements	Shorter of useful life or lease term		1,943			1,943
Furniture and fixtures	5		291			291
Machinery and equipment	3-5		3,072			2,893
Property and equipment—at cost			5,924			5,745
Less accumulated depreciation and amortization			(3,984	)		(3,559	)
Construction in progress			1,314			1,195
Property and equipment—net		$	3,254		$	3,381

Depreciation expense was $0.2 million for each of the three months ended June 30, 2024 and 2023, and $0.6 million and $0.4 million for the six months ended June 30, 2024 and 2023, respectively, recorded as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Cost of revenue	$	112	$	59	$	314	$	218
Research and development		50		46	$	99		83
General and administrative		21		35	$	84		70
Sales and marketing		14		14	$	67		28
Total depreciation and amortization expense	$	197	$	154	$	564	$	399

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8. Accrued Expenses and Other Current Liabilities

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

	June 30, 2024		December 31, 2023
Marketing reimbursement	$	1,620	$	2,834
Accrued compensation		2,921		1,687
Accrued clinical trials and R&D		3,831		3,694
Accrued selling and marketing		678		1,110
Accrued professional fees		1,292		1,505
Accrued warranty		25		44
Accrued restructuring		—		655
Other accrued expenses		4,357		3,966
Total accrued expenses and other current liabilities	$	14,724	$	15,495

In connection with strategic initiatives implemented during the year ended December 31, 2023, the Company's management approved and initiated plans to reduce its cost structure. During the three months ended June 30, 2024, the Company recorded less than $0.1 million in restructuring charges and paid less than $0.1 million in restructuring charges. During the six months ended June 30, 2024, the Company recorded less than $0.1 million in restructuring charges and paid $0.7 million in restructuring charges.

9. Debt

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

	June 30, 2024			December 31, 2023
Fortress Term Loan	$	—		$	43,100
RTW Convertible Notes	$	48,000		$	—
Total principal amount of debt		48,000			43,100
Change in fair value		(7,050	)		—
Plus: Accretion		—			148
Less: current portion of long-term debt, net of discounts		—			(38,643	)
Less: unamortized deferred financing costs and debt discounts		—			(4,605	)
Long-term debt, net of current portion and discounts	$	40,950		$	—

As of December 31, 2023, the fair value for the Company’s Fortress Term Loan approximated the carrying amount.

Term Loans

2021 Term Loan

In March 2021, the Company entered into a loan and security agreement (as amended, the “2021 Term Loan” and the “2021 Term Loan Agreement”) with Runway Growth Credit Fund, Inc. (“Runway”) that provided for borrowings up to $25.0 million.

In December 2021, the 2021 Term Loan Agreement was amended (the “Amendment”) to extend the maturity date of the 2021 Term Loan to December 30, 2025 and provide for an additional $20.0 million of borrowings. In December 2021, the Company issued warrants exercisable for 132,979 shares of Legacy Allurion Series C preferred stock as consideration for the Amendment and the draw down related to the 2021 Term Loan Agreement. The fair value of these warrants was determined to be $0.3 million upon issuance and are classified as a warrant liability on the condensed consolidated balance sheet as of June 30, 2024 and December 31, 2023 (see Note 11, Fair Value Measurements). Upon the closing of the Business Combination and after giving effect to the Reverse Stock Split, these warrants were converted into warrants exercisable for 5,203 shares of Allurion Common Stock.

In June 2022, the 2021 Term Loan Agreement was amended to revise definitional terms for certain milestone events, the final payment amount and certain financial covenants. In September 2022, the 2021 Term Loan Agreement was further amended to, among other things, increase additional borrowing up to $15.0 million.

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During June through December of 2022, the Company drew an additional $30.0 million of the 2021 Term Loan and warrants exercisable for 88,440 shares of Series D-1 preferred stock were issued. The fair value of these warrants was determined to be $0.8 million upon issuance and are classified as a warrant liability on the consolidated balance sheets as of June 30, 2024 and December 31, 2023 (see Note 11, Fair Value Measurements). Upon the closing of the Business Combination and after giving effect to the Reverse Stock Split, the warrants exercisable for 88,440 shares of Series D-1 preferred stock were converted into warrants exercisable for 3,620 shares of Allurion Common Stock.

On August 1, 2023, the 2021 Term Loan was paid off using the proceeds from the Fortress Term Loan (see below). The total payoff amount was $58.0 million, consisting of $55.0 million repayment of principal, a $1.1 million prepayment fee, and a $1.6 million final payment fee. The prepayment fee was calculated as 2% of the outstanding principal balance as of August 1, 2023. The final payment fee was calculated as the 3% of the outstanding principal balance as of August 1, 2023 less the original final payment of $0.1 million. The Company recorded a $3.9 million loss on extinguishment of debt in connection with the 2021 Term Loan repayment.

Interest expense for the three months ended June 30, 2023 related to the 2021 Term Loan was $2.2 million, consisting of $2.0 million of contractual interest, less than $0.1 million of amortization of the debt discount, and $0.1 million amortization of warrant and term loan accretion. Interest expense for the six months ended June 30, 2023 related to the 2021 Term Loan was $4.3 million, consisting of $4.0 million of contractual interest, $0.1 million amortization of the debt discount, $0.1 million of amortization of the warrant, and $0.1 million of term loan accretion.

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 had a maturity date of June 30, 2027 and accrued 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 was payable in arrears on a monthly basis. The Fortress Term Loan provided for an exit payment equal to 3.0% of the Fortress Term Loan (the "Exit Fee") 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 will be 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 had 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 Allurion Common Stock at a conversion price based on the 30-day volume weighted average price ("VWAP") of Allurion 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. In connection with the modification and related prepayment, the Company wrote off $0.8 million of the unamortized debt issuance costs which was recorded within interest expense on the condensed consolidated statement of operations for the year ended December 31, 2023.

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% that will apply to all outstanding obligations during the occurrence and continuance of an event of default. In accordance with ASC 815, 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-measured 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 condensed consolidated statement of operations for the three and six months ended June 30, 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

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with the Fortress Term Loan repayment in the condensed consolidated statement of operations for the three and six months ended June 30, 2024.

Interest expense for the three months ended June 30, 2024 related to the Fortress Term Loan was $0.3 million, consisting of $0.3 million of contractual interest and less than $0.1 million amortization of debt discount and term loan accretion. Interest expense for the six months ended June 30, 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%.

Convertible Notes

2021 Convertible Notes

In December 2021, the Company entered into a convertible note agreement with investors for gross proceeds of $2.0 million with a stated interest rate of 5.0% per annum (the “2021 Convertible Notes”) and a maturity date 36 months from the date of issuance unless previously converted pursuant to their terms of the agreement. No issuance costs were incurred.

The 2021 Convertible Notes provided that, effective upon either a Special Purpose Acquisition Company (i.e. “deSPAC”) transaction, closing of a qualified financing, or closing of a non-qualified financing, all of the outstanding principal and interest would automatically convert into shares of Legacy Allurion common stock or shares of the same class or series of capital stock issued in the qualified financing in an amount equal to the balance of the 2021 Convertible Notes on the date of conversion divided by the capped conversion price, which is calculated by dividing $600.0 million by the fully diluted capitalization of the Company immediately prior to the conversion of the 2021 Convertible Notes.

Interest expense for each of the three and six months ended June 30, 2023 related to the 2021 Convertible Notes was less than $0.1 million and $0.1 million, respectively, consisting entirely of contractual interest. Interest expense related to the 2021 Convertible Notes is recorded within Interest expense on the condensed consolidated statement of operations. On August 1, 2023, in connection with the closing of the Business Combination and after giving effect to the Reverse Stock Split, the outstanding 2021 Convertible Notes were converted into an aggregate 5,345 shares of Allurion Common Stock with a corresponding recognition of APIC of $2.2 million, and are no longer outstanding.

2022 Convertible Notes

In January 2022, the Company entered into a convertible note purchase agreement with investors for gross proceeds of $1.1 million with a stated interest rate of 5.0% per annum (the “2022 Convertible Notes”). The 2022 Convertible Notes were to mature 36 months from the issuance date unless previously converted pursuant to the terms of the agreement. Issuance costs were de minimis. The 2022 Convertible Notes had the same terms as the 2021 Convertible Notes.

Interest expense for each of the three and six months ended June 30, 2023 related to the 2022 Convertible Notes was less than $0.1 million, consisting entirely of contractual interest. Interest expense related to the 2022 Convertible Notes is recorded within Interest expense on the condensed consolidated statement of operations. On August 1, 2023, in connection with the closing of the Business Combination and after giving effect to the Reverse Stock Split, the outstanding 2022 Convertible Notes were converted into an aggregate 3,329 shares of Allurion Common Stock with a corresponding recognition of APIC of $1.2 million, and are no longer outstanding.

2023 Convertible Notes

Between February and August 2023, the Company entered into a convertible note purchase agreement, and related side letters, for the sale of convertible notes (the "2023 Convertible Notes") to certain investors for gross proceeds of $28.7 million, with a stated interest rate of 7.0% per annum. The 2023 Convertible Notes provided that they would mature on December 31, 2026 unless previously converted pursuant to the terms of the note purchase agreement. The 2023 Convertible Notes also provided that, effective upon a deSPAC transaction, all of the outstanding principal and interest would automatically convert into a number of shares of Legacy Allurion common stock equal to the balance of the 2023 Convertible Notes on the date of conversion divided by the discounted capped conversion price, which is calculated by dividing $217.3 million by the fully diluted capitalization of the Company immediately prior to the conversion of the 2023 Convertible Notes.

Additionally, the 2023 Convertible Notes provided that, effective upon the closing of a qualified financing, holders of the 2023 Convertible Notes could optionally accelerate repayment of the principal and interest of the 2023 Convertible Notes or convert all of the outstanding principal and interest into shares of Legacy Allurion common stock or shares of the same class or series of capital stock issued in the qualified financing equal to the balance of the 2023 Convertible Notes on the date of conversion divided by the greater of the capped price or the discounted price. The capped price is calculated by dividing $260.0 million by the fully diluted capitalization of the Company immediately prior to the conversion of the 2023 Convertible Notes, and the discounted price is calculated as 85% of the cash price of the same class or series of capital stock issued in the qualified financing. The 2023 Convertible Notes are accounted for under the fair FVO election of ASC 825 as the notes contain embedded derivatives, including the automatic conversion upon a deSPAC transaction prior to the deSPAC deadline, voluntary conversion upon a qualified financing, automatic

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repayment upon a sale event, and conversion rate adjustment, which would require bifurcation and separate accounting. These convertible notes are 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.

Interest expense for each of the three and six months ended June 30, 2023 related to the 2023 Convertible Notes was $0.3 million and $0.4 million, respectively, consisting entirely of contractual interest. Interest expense related to the 2023 Convertible Notes is recorded within Interest expense on the condensed consolidated statement of operations.

On May 2, 2023 the Company entered into termination agreements (the “Termination Agreements”) with respect to side letters entered into with certain holders of the 2023 Convertible Notes. With respect to the Termination Agreement with one of the side letter holders (the “Side Letter Holder”), the Company had the right to prepay, in one or more transactions, all or a portion of the outstanding principal amount, plus accrued interest, under such holder's 2023 Convertible Note (the “Side Letter Holder Bridge Note”), including by way of (a) a $2 million payment in cash by the Company to the Side Letter Holder on May 2, 2023, $1.5 million of which was deemed a prepayment penalty and recorded as other expense on the income statement, with the remaining $0.5 million recorded as a reduction of the principal amount, (b) immediately prior to the consummation of the transactions contemplated by the Business Combination Agreement, an additional payment of at least $6 million, up to the then-outstanding principal amount, plus accrued interest, under the Side Letter Holder Bridge Note by way of (i) payment in cash by the Company and/or (ii) the sale and transfer of all or any portion of the Side Letter Holder Bridge Note, equivalent in value to the portion of the additional payment to be repaid pursuant to this clause (b)(ii), to any person or persons designated in writing by the Company. The Termination Agreements were accounted for as a modification of debt and the modified convertible notes continued to be accounted for under the FVO with any change in fair value recognized in other expense on the income statement.

In addition, under the Termination Agreement executed with the Side Letter Holder, the Company agreed to issue to the Side Letter Holder a number of shares of Allurion Common Stock (“PubCo Additional Shares”) equal to (a) the outstanding principal and accrued interest under the Side Letter Holder Bridge Note immediately prior to the consummation of the transactions contemplated by the Business Combination Agreement (after giving effect to the payment of the repayments) divided by $125.00, plus (b) 12,000 shares of Allurion Common Stock. The PubCo Additional Shares were accounted for as a freestanding financing liability. The liability for the PubCo Additional Shares was initially measured at its issue-date estimated fair value and subsequently remeasured at fair value at each reporting period, with changes in fair value reflected in earnings until the PubCo Additional Shares were issued. A $3.4 million liability was recorded at issuance for the PubCo Additional Shares as Other liabilities on the balance sheet. On August 1, 2023, upon closing of the Business Combination and after giving effect to the Reverse Stock Split, the Side Letter Holder was issued 15,508 PubCo Additional Shares with a corresponding recognition of APIC of $2.7 million, and the liability is no longer outstanding.

Further on May 2, 2023, RTW and Fortress (the “Backstop Purchasers”) entered into the Backstop Agreement with the Company, Legacy Allurion and the Side Letter Holder. Pursuant to the Backstop Agreement, each Backstop Purchaser agreed that to the extent any Side Letter Holder Bridge Notes remained outstanding prior to the consummation of the Business Combination, such Backstop Purchaser would, at the closing of the Business Combination, purchase up to $2.0 million of the Side Letter Holder Bridge Notes from the Side Letter Holder in exchange for shares of Allurion Common Stock (the “Base PubCo Shares”, “Backstop Shares” and “Conditional Additional PubCo Shares”). The Base PubCo Shares and Backstop Shares were accounted for as a freestanding financing liability. The Base PubCo Shares and Backstop Shares liability was initially measured at its issue-date estimated fair value and subsequently remeasured at fair value at each reporting period with changes in fair value reflected in earnings until the Base PubCo Shares and Backstop Shares were issued. A $3.3 million liability was recorded at issuance for the Base PubCo Shares and Backstop Shares liability as Other liabilities on the balance sheet. On August 1, 2023, upon closing of the Business Combination and after giving effect to the Reverse Stock Split, per the terms of the Fortress Term Loan, the Amended and Restated RTW Side Letter and Backstop Agreement, the Backstop Purchasers were each issued 38,000 shares of Allurion Common Stock with a corresponding recognition of APIC of $13.4 million, and the liability is no longer outstanding.

On August 1, 2023, immediately prior to the closing of the Business Combination and after giving effect to the Reverse Stock Split, the Company repaid $6.3 million of the Side Letter Holder Bridge Note, leaving a principal balance of $6.3 million. Each Backstop Purchaser then purchased $2.0 million principal amount of the outstanding portion of the Side Letter Holder Bridge Note, Allurion canceled the existing Side Letter Holder Bridge Note and issued a new convertible note to the Side Letter Holder for the remaining balance together with all unpaid interest accrued since the date of issuance of $2.7 million, Allurion issued convertible notes to each Backstop Purchaser with an issuance date of the Closing Date (August 1, 2023) and an original principal amount of $2.0 million each, and Allurion issued 28,000 shares of Allurion Common Stock to each Backstop Purchaser. Additionally, the outstanding 2023 Convertible Notes were converted into an aggregate 123,376 shares of Allurion Common Stock with a corresponding recognition of APIC of $22.2 million, and are no longer outstanding.

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,

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the Principal Purchaser, the Purchasers, and Acquiom entered into the First Amendment to the Original Note Purchase Agreement (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 $15,000,000 (the “Next Equity Financing”). On July 1, 2024, we consummated the Public Offering, as described elsewhere in this Quarterly Report on Form 10-Q/A, 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.

The RTW Convertible Notes are accounted for under the FVO election of ASC 825 as the notes contain embedded derivatives, including the conversion upon Stockholder Approval, the conversion upon a Fundamental Change Company Notice, the conversion upon a Make-Whole Fundamental Change, redemption upon the event of default, and redemption upon a Fundamental Change, which would require bifurcation and separate accounting. The RTW Convertible Notes are 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 was $49.1 million, with a corresponding $1.1 million loss recognized in Other income (expense), net in the condensed consolidated statement of operations. In connection with the issuance of the RTW Convertible Notes and RIFA Amendment (as defined below), we 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. For the three and six months ended June 30, 2024, the Company recorded an $8.0 million gain (as restated) and $0.1 million gain (as restated) through the condensed consolidated statements of operations and other comprehensive income (loss), respectively.

The Amended Note Purchase Agreement contains financial maintenance covenants, which require (i) the Company maintain not less than $12,500,000 in unrestricted cash in controlled accounts in the U.S. at all times, (ii) the Company to receive minimum trailing twelve-month consolidated revenue at amounts designated in the Amended Note Purchase Agreement, tested quarterly beginning with the twelve-month period ending March 31, 2025, and (iii) the Company's and its subsidiaries’ consolidated business operations outside the United States to be profitable for the trailing three-month period, tested quarterly beginning with the three-month period ending December 31, 2025. The Company is in compliance with the covenants in the Amended Note Purchase Agreement as of June 30, 2024.

The Company elected paid in kind interest for the three and six months ended June 30, 2024 related to the RTW Convertible Notes.

10. 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 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.

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.

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The Revenue Interest Financing is accounted for under the FVO election of ASC 825 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 our 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 condensed 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 expense due to the FVO election. As of June 30, 2024, the Company has made $2.1 million in royalty payments to RTW. Refer to Note 11, 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.

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 Investment 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 Investment. Such additions to the Investment Amount would result in proportional increases to the minimum aggregate revenue interest payments described above. 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 condensed 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. The PIPE Conversion Option liability is 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).

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. As of June 30, 2024, the Revenue Interest Financing and PIPE Conversion Option were re-measured to $39.0 million and $5.5 million, respectively.

For the three months ended June 30, 2024, the Company recorded a $8.1 million loss (as restated) and a $3.0 million gain (as restated) through the condensed consolidated statements of operations and other comprehensive income (loss), respectively. For the six months ended June 30, 2024, the Company recorded a $9.1 million loss (as restated) and a $5.2 million gain (as restated) through the condensed consolidated statements of operations and other comprehensive income (loss), respectively. The changes in fair value were recorded in the Changes in fair value of Revenue Interest Financing and PIPE Conversion Option in the condensed consolidated statement of operations.

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11. Fair Value Measurements

The following tables present the fair value hierarchy for the Company's 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):

Fair Value Measurement as of June 30, 2024
	Total Carrying Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Money market funds	$	13,304	$	13,304	$	—	$	—
Total assets	$	13,304	$	13,304	$	—	$	—
Liabilities:
Legacy Allurion Common Stock Warrant Liabilities	$	145	$	—	$	—	$	145
Public Warrants		2,113		2,113		—		—
Revenue Interest Financing		39,000		—		—		39,000
PIPE Conversion Option		5,450		—		—		5,450
Earn-out Liability		4,110		—		—		4,110
RTW Convertible Notes		40,950		—		—		40,950
Success Fee Derivative Liability		14		—		—		14
Total Liabilities	$	91,782	$	2,113	$	—	$	89,669

Fair Value Measurement as of December 31, 2023
	Total Carrying Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Money market funds	$	30,582	$	30,582	$	—	$	—
Total assets	$	30,582	$	30,582	$	—	$	—
Liabilities:
Legacy Allurion Common Stock Warrant Liabilities	$	821	$	—	$	—	$	821
Public Warrants		5,943		5,943		—		—
Revenue Interest Financing		36,200		—		—		36,200
PIPE Conversion Option (Restated)		6,410		—		—		6,410
Earn-out Liability		23,990		—		—		23,990
Term Loan Derivative Liability		1,895		—		—		1,895
Success Fee Derivative Liability		14		—		—		14
Total Liabilities	$	75,273	$	5,943	$	—	$	69,330

Public Warrants

As a result of the Business Combination on August 1, 2023, the Company recorded a liability for Public Warrants to purchase the Company's Common Stock. The Public Warrants are traded on the NYSE and are recorded at fair value using the closing price as June 30, 2024 of $0.16, which is a Level 1 input.

Legacy Allurion Warrants

The Company has classified the Legacy Allurion Common Stock Warrants 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:

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	Measurement Date	Interest Rate			Exercise Price		Estimated Fair Value of Underlying Share Price		Expected Volatility			Expected Life (Years)
Legacy Allurion Series C Preferred Stock warrants (as converted to Common)	June 30, 2024		4.33	%	$	168.25	$	25.00		90	%		6.75
Other Common Stock	June 30, 2024		4.50	%		26.25		25.00		90	%		3.19
Legacy Allurion Series D-1 Preferred Stock warrants (as converted to Common)	June 30, 2024	4.33%-4.34%				303.50		25.00		90	%	6.75-8.21

	Measurement Date	Interest Rate	Exercise Price		Estimated Fair Value of Underlying Share Price		Expected Volatility			Expected Life (Years)
Legacy Allurion Series C Preferred Stock warrants (as converted to Common)	December 31, 2023	3.88%	$	168.25	$	93.50		100	%		7.25
Other Common Stock	December 31, 2023	3.95%		26.25		93.50		100	%		3.69
Legacy Allurion Series D-1 Preferred Stock warrants (as converted to Common)	December 31, 2023	3.88%		303.50		93.50		100	%	7.25-8.71

Expected dividend yield for all calculations is 0.00%.

The following table reconciles the changes in fair value for the three and six months ended June 30, 2024 and 2023 of the warrant liabilities valued using Level 3 inputs:

	Preferred Stock Warrants (as converted to Common)			Common Stock Warrants			Total
Balance – March 31, 2023	$	2,585		$	1,245		$	3,830
Change in fair value		98			106			204
Exercise of warrants		(4	)		—			(4	)
Balance – June 30, 2023	$	2,679		$	1,351		$	4,030
Balance – March 31, 2024	$	233		$	71		$	304
Change in fair value	$	(123	)	$	(36	)		(159	)
Balance – June 30, 2024	$	110		$	35		$	145

	Preferred Stock Warrants (as converted to Common)			Common Stock Warrants			Total
Balance – January 1, 2023	$	1,777		$	596		$	2,373
Change in fair value		924			755			1,679
Exercise of warrants		(22	)		—			(22	)
Balance – June 30, 2023	$	2,679		$	1,351		$	4,030
Balance – January 1, 2024	$	642		$	179		$	821
Change in fair value	$	(532	)	$	(144	)		(676	)
Balance – June 30, 2024	$	110		$	35		$	145

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 June 30, 2024 and December 31, 2023 using the following assumptions: weighted-average probability for the likelihood of a change in control or

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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.

2023 Convertible Notes

The 2023 Convertible Notes were 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 re-measured at estimated fair value on a recurring basis at each reporting period date. The fair value was measured as of August 1, 2023, just prior to the conversion of the 2023 Convertible Notes, using the share price at conversion after giving effect to the Reverse Stock Split ($176.00 per share). Upon the conversion of the 2023 Convertible Notes, the convertible note liability was derecognized.

Revenue Interest Financing and PIPE Conversion Option

The Revenue Interest Financing is 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 June 30, 2024 and December 31, 2023 using a discounted cash flow ("DCF") method under the income approach utilizing future revenue projections and a discount rate of 30.1% and 24.4%, respectively.

The fair value of the PIPE Conversion Option was accounted for as a derivative under ASC 815. The instrument is measured using a Monte Carlo Simulation Method ("MCSM") using the number of shares convertible of 42,614 and the following assumptions:

	June 30, 2024			December 31, 2023
Stock Price	$	25.00		$	93.50
Risk-free interest rate		5.06	%		4.46	%
Expected term (in years)		1.1			1.6
Expected volatility		110.0	%		82.5	%

Earn-Out Liability

Upon the closing of the Business Combination, 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 MCSM with the following assumptions at each valuation date:

	June 30, 2024			December 31, 2023
Stock Price	$	25.00		$	93.50
Risk-free interest rate		4.4	%		3.9	%
Expected term (in years)		4.1			4.6
Expected volatility		103.0	%		87.0	%

Term Loan Derivative Liability

The Term Loan derivative liability associated with the Fortress Term Loan was derecognized as of June 30, 2024 as the Fortress Term Loan was repaid on April 16, 2024.

RTW Convertible Notes

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 June 30, 2024 using a DCF method under the income approach with a 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 $48.0 million principal amount of the RTW Convertible Notes and the following assumptions:

	June 30, 2024
Stock Price	$	25.00
Risk-free interest rate		4.3	%
Expected term (in years)		6.8
Expected volatility		80.0	%

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The changes in the fair values of the Success Fee derivative liability, 2023 Convertible Notes, Revenue Interest Financing, PIPE Conversion Option, Earn-out liability, Term Loan Derivative liability, RTW Convertible Notes, PubCo Share liability, and Base PubCo and Backstop Share liability categorized with Level 3 inputs for the three months ended June 30, 2024 and 2023 were as follows:

	Success Fee Derivative Liability		2023 Convertible Notes			Revenue Interest  Financing			PIPE Conversion Derivative			Earn-Out Liability			Term Loan Derivative Liability			RTW Convertible Notes			PubCo Share Liability				Base PubCo & Backstop Share Liability		Total
Balance – March 31, 2023	$	207	$	13,600		$	—		$	—		$	—		$	—		$	—		$	—			$	—	$	13,807
Fair value upon issuance		—		5,950		$	—			—			—			—			—			3,370				3,264		12,584
Change in fair value		6		(2,257	)		—			—			—			—			—			(43	)			41		(2,253	)
Repayments of debt		—		(500	)		—			—			—			—			—			—				—		(500	)
Balance – June 30, 2023	$	213	$	16,793		$	—		$	—		$	—		$	—		$	—		$	3,327			$	3,305	$	23,638
Balance – March 31, 2024	$	14	$	—		$	35,000		$	7,510		$	9,800		$	1,957		$	—		$	—			$	—	$	54,281
Fair value upon issuance		—		—			—			—			—			—			49,100			—				—		49,100
Change in fair value (Restated)(1)		—		—			8,054			(2,060	)		(5,690	)		(1,957	)		(8,070	)		—		—		—		(9,723	)
Change in fair value - OCI (Restated)(1)		—		—			(3,000	)		—			—			—			(80	)		—		—		—		(3,080	)
Repayments of debt		—		—			(1,054	)		—			—			—			—			—		—		—		(1,054	)
Balance – June 30, 2024	$	14	$	—		$	39,000		$	5,450		$	4,110		$	—		$	40,950		$	—			$	—	$	89,524

(1) As discussed in FN 2, Restatement of Previously Issued Financial Statements, the Company identified an error in its historical financial statements related to the change in fair value due to instrument specific credit risk for the Revenue Interest Financing and RTW Convertible Notes. The only restated numbers in the table above relate to the 'Change in fair value' and 'Change in fair value - OCI' for both the Revenue Interest Financing and RTW Convertible Notes.

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	Success Fee Derivative Liability		2023 Convertible Notes			Revenue Interest  Financing			PIPE Conversion Derivative			Earn-Out Liability			Term Loan Derivative Liability			RTW Convertible Notes			PubCo Share Liability			Base PubCo & Backstop Share Liability		Total
Balance – January 1, 2023	$	178	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	178
Fair value upon issuance		—		19,550		$	—			—			—			—			—			3,370			3,264		26,184
Change in fair value		35		(2,257	)		—			—			—			—			—			(43	)		41		(2,224	)
Repayments of debt		—		(500	)		—			—			—			—			—			—			—		(500	)
Balance – June 30, 2023	$	213	$	16,793		$	—		$	—		$	—		$	—		$	—		$	3,327		$	3,305	$	23,638
Balance – January 1, 2024 (Restated)(1)	$	14	$	—		$	36,200		$	6,410		$	23,990		$	1,895		$	—		$	—		$	—	$	68,509
Fair value upon issuance		—		—			—			—			—			—			49,100			—			—		49,100
Change in fair value (Restated)(1)		—		—			9,054			(960	)		(19,880	)		(1,895	)		(8,070	)		—			—		(21,751	)
Change in fair value - OCI (Restated)(1)		—		—			(5,200	)		—			—			—			(80	)		—			—		(5,280	)
Repayments of debt		—		—			(1,054	)		—			—			—			—			—			—		(1,054	)
Balance – June 30, 2024	$	14	$	—		$	39,000		$	5,450		$	4,110		$	—		$	40,950		$	—		$	—	$	89,524

(1) As discussed in FN 2, Restatement of Previously Issued Financial Statements, the Company identified an error in its historical financial statements related to the change in fair value due to instrument specific credit risk for the Revenue Interest Financing and RTW Convertible Notes, as well as a change in fair value of the PIPE Conversion Option. The only restated numbers in the table above relate to the 'Change in fair value' and 'Change in fair value - OCI' for both the Revenue Interest Financing and RTW Convertible Notes, as well as the 'Change in fair value' and 'Balance - January 1, 2024' related to the PIPE Conversion Option.

The change in fair value of the Success Fee derivative liability, 2023 Convertible Notes, Revenue Interest Financing, PIPE Conversion Option, Earn-Out liability, Term Loan Derivative liability, RTW Convertible Notes, Pubco Share liability, and Base PubCo and Backstop Share liability at each period is recorded as a component of Other income (expense) in the condensed 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, which is recorded as a component of other comprehensive loss.

12. Income Taxes

The Company recorded income tax expense for each of the three and six months ended June 30, 2024 of $0.1 million, representing effective tax rates of (0.8%) (as restated) and (2.3%) (as restated), respectively. The Company recorded income tax expense for the three and six months ended June 30, 2023 of less than $0.1 million and $0.1 million, respectively, representing effective tax rates of (0.1%) in both periods. The tax expense recorded relates to the earnings of the Company’s profitable foreign subsidiaries.

As of June 30, 2024 and 2023, the Company maintained a full valuation allowance against its net deferred tax assets as the Company has incurred significant operating losses since inception and has concluded that its net deferred tax asset is not more-likely-than-not realizable.

As of June 30, 2024 and 2023, the Company has not recorded tax reserves for any uncertain tax provisions.

13. Capital Stock and Stockholders' Deficit

The Allurion Certificate of Incorporation authorizes the issuance of up to 100,000,000 shares of Allurion preferred stock. As of June 30, 2024, no shares of Allurion preferred stock were outstanding.

Common Equity

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The Allurion Certificate of Incorporation authorizes the issuance of up to 1,000,000,000 shares of Allurion Common Stock. As of June 30, 2024 and December 31, 2023, 1,918,927 and 1,907,529 shares of Common Stock were outstanding, respectively, after retrospectively adjusting for the effect of the reverse recapitalization and Reverse Stock Split.

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 June 30, 2024, is as follows:

Outstanding options to purchase Common Stock	288,172
Restricted Stock Units	23,738
Warrants to purchase Common Stock	16,151
Shares of Common Stock issued upon the exercise of Public Warrants	750,383
Earn-Out Shares	360,000
Convertible Notes	19,168
Total	1,457,612

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 June 30, 2024, there were 16,151 such 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.

June 30, 2024
Issuance Date	Remaining Contractual Term (in years)		Underlying Equity Instrument	Balance Sheet Classification	Shares Issuable Upon Exercise of Warrant		Weighted Average Exercise Price
12/1/2014		0.4	Common Stock	Equity		1,771	$	61.00
3/30/2021		6.7	Common Stock	Liability		5,203		168.25
9/15/2022		8.2	Common Stock	Liability		1,810		303.50
6/4/2022		7.9	Common Stock	Liability		1,810		303.50
1/17/2017		2.5	Common Stock	Equity		2,934		0.50
8/3/2017		3.1	Common Stock	Equity		392		28.25
9/8/2017		3.2	Common Stock	Liability		1,151		26.25
6/19/2018		4.0	Common Stock	Liability		720		26.25
6/25/2019		5.0	Common Stock	Liability		360		26.25
						16,151

December 31, 2023
Issuance Date	Remaining Contractual Term (in years)		Underlying Equity Instrument	Balance Sheet Classification	Shares Issuable Upon Exercise of Warrant		Weighted Average Exercise Price
12/1/2014		0.9	Common Stock	Equity		1,771	$	61.00
3/30/2021		7.2	Common Stock	Liability		5,203		168.25
9/15/2022		8.7	Common Stock	Liability		1,810		303.50
6/4/2022		8.4	Common Stock	Liability		1,810		303.50
1/17/2017		3.0	Common Stock	Equity		2,934		0.50
8/3/2017		3.6	Common Stock	Equity		392		28.25
9/8/2017		3.7	Common Stock	Liability		1,151		26.25
6/19/2018		4.5	Common Stock	Liability		720		26.25
6/25/2019		5.5	Common Stock	Liability		360		26.25
						16,151

In Compute Health's initial public offering, it sold units at a price of $10.00 per unit, which consisted of one share of Class A Common Stock, $0.0001 par value, of Compute Health ("Class A Common Stock") and one-half of a redeemable warrant (each a "Public Warrant") that entitled the holder the right to purchase one share of Class A Common Stock of CPUH at a price of $11.50 per share. 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 after giving effect to the Reverse Stock Split, each of the outstanding Compute Health Public Warrants

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became exercisable for 0.056818 shares of the Company’s Common Stock at an exercise price of $202.50 per share and each whole 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.

The Company may redeem the outstanding Public Warrants for cash at a price of $0.25 per Public Warrant at any time commencing 90 days after the completion of the Business Combination, and provided that the last sales price the Company’s Common Stock equals or exceeds $316.75 per share of any 20 trading days within a 30-day trading period ending on the third trading day prior to the date on which notice of redemption is given.

The Company may redeem the outstanding Public Warrants for shares of our Common Stock at a price of $2.50 per Public Warrant at any time commencing 90 days after the completion of the Business Combination, and provided that the last sales price of the Company’s Common Stock equals or exceeds $176.00 per share of any 20 trading days within a 30-day trading period ending on the third trading day prior to the date on which notice of redemption is given. Holders of the Public Warrants will be able to exercise their warrants on a cashless basis prior to redemption and receive that number of shares based on the redemption date and the fair market value (the “Redemption Fair Market Value”) of the shares of the Company's Common Stock. The Redemption Fair Market Value is determined based on the volume weighted average price of the Company’s Common Stock for the ten trading days immediately following the date on which notice of redemption is sent to the holders. As of June 30, 2024, the Company has not redeemed any of the outstanding Public Warrants. As of June 30, 2024, 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 (the "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 issued 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 immediately following commencement. As of June 30, 2024, the Company had sold 5,730 shares of Common Stock to Chardan at a purchase price of $0.4 million in connection with the Purchase Agreement.

Public Offering and Concurrent Private Placement

On July 1, 2024, the Company closed the Public Offering (as defined below) and Private Placement (as defined below) for gross proceeds of $17.3 million and $2.7 million, respectively. On July 5, 2024 the Underwriters (as defined below) exercised a portion of the option for additional gross proceeds of $2.3 million. Refer to Note 20, Subsequent Events, for further information regarding the Public Offering and Private Placement.

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14. Net Loss per Share

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Numerator:
Net loss	$	(8,322	)	$	(21,996	)	$	(6,326	)	$	(39,797	)
Cumulative undeclared preferred dividends to participating securities (Legacy Series D convertible preferred stock)		—			(725	)		—			(1,442	)
Net loss attributable to common shareholders	$	(8,322	)	$	(22,721	)	$	(6,326	)	$	(41,239	)
Denominator:
Weighted-average common shares outstanding - basic and diluted		1,917,872			1,084,300			1,914,527			1,083,897
Net loss per share attributable to common shareholders, basic and diluted	$	(4.34	)	$	(20.95	)	$	(3.30	)	$	(38.05	)

For the three and six months ended June 30, 2024 and 2023, 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 share number of shares of Common Stock outstanding used to calculate both basic and diluted net loss per share attributable to common shareholders is the same. The Company excluded the following potential shares of Common Stock, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common shareholders for the periods indicated because including them would have had an anti-dilutive effect.

	As of June 30,
	2024		2023
Outstanding options to purchase Common Stock		288,172		165,442
Restricted Stock Units		23,738		56,605
Warrants to purchase Common Stock		16,151		17,307
Shares of Common Stock issued upon the exercise of Public Warrants		750,383		—
Earn-Out Shares		360,000		—
Convertible Notes		19,168		139,599
Total		1,457,612		378,953

15. 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 cancelled 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.

In connection 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. As of June 30, 2024, a total of 339,982 shares of Allurion Common Stock are reserved for issuance under the 2023 Plan. The 2023 Plan provides that the number of

34

shares reserved for issuance under the 2023 Plan will automatically increase each January 1, beginning January 1, 2024 and ending January 1, 2033, 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 June 30, 2024, 311,685 options and RSUs were issued and outstanding under the 2010 Plan, 2020 Plan, and 2023 Plan. As of December 31, 2023, 181,186 options and RSUs were issued and outstanding under the 2010 Plan, 2020 Plan, and 2023 Plan. The stock options generally vest over a four-year period and expire 10 years from the date of grant.

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Cost of revenue	$	6	$	3	$	11	$	15
Selling, general and administrative		768		372		1,318		758
Research and development		31		26		28		37
Total stock-based compensation expense	$	805	$	401	$	1,357	$	810

Stock Options

The following table summarizes the option activity under the 2010 Plan, 2020 Plan, and the 2023 Plan during the six months ended June 30, 2024:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
				(per option)		(in years)		(in thousands)
Outstanding—January 1, 2024		155,441		$	66.75		6.9	$	5,565
Granted		147,443			46.50
Cancellations and forfeitures		(14,290	)		60.25
Exercised		(646	)		34.25
Outstanding—June 30, 2024		287,948			56.75		8.2		14
Exercisable at June 30, 2024		114,409		$	59.75		6.1	$	12

Total stock compensation expense related to stock option awards during the three and six months ended June 30, 2024 was $0.5 million and $0.8 million, respectively. As of June 30, 2024, there was approximately $6.3 million of unrecognized compensation costs related to unvested stock options granted under the 2010 Plan, 2020 Plan, and 2023 Plan, which is expected to be recognized over a weighted-average vesting term of 3.2 years. The weighted average grant-date fair value of the stock option awards granted during the six months ended June 30, 2024 was $32.50 per option.

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 that 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.

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There were no grants during the six months ended June 30, 2023. The assumptions used in the Black Scholes option-pricing model for the six months ended June 30, 2024 are as follows:

	Six Months Ended June 30,
	2024
Expected volatility		71	%
Risk-free interest rate		4.36	%
Expected dividend yield		0	%
Expected term (in years)		6.1

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. See Note 4, Business Combination for information about the closing of the Business Combination with Compute Health. Upon the satisfaction of the closing condition, 62.5% of the RSUs awarded vested. Thereafter, the remaining 37.5% of the RSUs will vest monthly over a period of two years. All RSUs are subject to forfeiture if the grantee’s continuous service relationship as a member of the Board of Directors terminates prior to vesting. In October 2023 and March 2024, the Company issued RSUs to its Board of Director members that will vest in equal installments over three years, subject to continued service as a director through each vesting date. The following table summarizes the restricted stock unit activity under the 2020 Plan and 2023 Plan during the three months ended June 30, 2024:

	Number of RSUs			Weighted Average Grant Date Fair Value
				(per share)
Outstanding—January 1, 2024		25,745		$	111.25
Granted		3,000		65.25
Cancellations and forfeitures		—
Vested		(5,010	)		112.74
Outstanding—June 30, 2024		23,735		$	105.00

Total stock compensation expense related to RSUs for the three and six months ended June 30, 2024 was $0.3 million and $0.6 million, respectively. As of June 30, 2024, there were $1.3 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 1.8 years.

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 56,893 shares of the Company's Common Stock are reserved and authorized for issuance under the 2023 ESPP. 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 less number of shares determined by the administrator of the 2023 ESPP. As of June 30, 2024, no shares have been issued under the 2023 ESPP.

16. 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 three and six months ended June 30, 2024 and 2023, the Company's matching contributions to the plan were less than $0.1 million.

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17. 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.

In February 2023 and August 2023, the Company executed amendments to three of its leases in Natick, Massachusetts and its Hudson, Massachusetts lease, respectively. The amendments were accounted for as a modification of the existing lease agreements, with impacts to the lease term, lease payments, and related lease liability for each of the four leases. As a result of these amendments, the leases in Natick and Hudson will now expire between March 2025 and March 2028, and additional operating lease assets obtained in exchange for lease obligations were $0.9 million. 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 will now expire in March 2025 and additional operating lease assets obtained in exchange for lease obligations were less than $0.1 million. In February 2024, the Company terminated one of its leases in Paris, France.

As of June 30, 2024, the Company was a party to six different leases for office, manufacturing, and laboratory space under non-cancelable office leases in three cities. These leases total approximately 51,000 square feet and will expire between June 2024 and March 2028. The Company has a right to extend certain of these leases for periods between three and five years. The Company also holds immaterial leases related to vehicles and office equipment. Under its 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 components of right-of-use ("ROU") assets and lease liabilities are included in the condensed 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 condensed consolidated balance sheets.

Aggregate Lease Information

Other pertinent lease information for the three and six months ended June 30, 2024 and 2023 is as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Operating lease costs	$	257	$	275	$	535	$	549
Short-term lease costs		10		7		20		13
Variable lease costs		58		72		135		160
Operating cash flows paid for amounts in the    measurement of lease liabilities		263		284		555		546
Operating lease assets obtained in exchange    for lease obligations		15		—		15		874

Future commitments under non-cancelable operating lease agreements as of June 30, 2024 are as follows (in thousands):

2024	$	535
2025		1,035
2026		730
2027		641
2028		108
Total lease payments	$	3,049
Less: present value adjustment		(411	)
Total lease liabilities		2,638
Less: current lease liability		(850	)
Long-term operating lease liabilities	$	1,788

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

	June 30, 2024			June 30, 2023
Weighted -average remaining lease term (in years)		3.1			3.9
Weighted-average discount rate		9.9	%		9.5	%

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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 actions, 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. As of June 30, 2024 and December 31, 2023, the Company has not recorded accruals for probable losses related to any existing or pending litigation or claims as the Company’s management has determined that there are no matters where a potential loss is probable and reasonably estimable. The Company does not believe that any existing or pending claims would have a material impact on the Company’s consolidated financial statements.

18. Segment Information

Segment reporting is prepared on the same basis that the Company's chief executive officer, who is our chief operating decision maker (“CODM”), manages the business, makes operating decisions, and assesses performance. The Company operates in one 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 5, Revenue for information on revenue by geography. Significant segment expenses are set forth in the following table (in thousands):

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Revenue	$	11,766		$	12,960		$	21,152		$	27,031
Less:
Cost of revenue		2,773			2,992			5,293			5,932
Sales and marketing		6,718			10,273			12,863			22,137
Clinical trials and medical affairs		2,371			3,672			5,642			8,333
Product development		739			1,066			1,783			2,493
Digital		621			1,117			1,369			2,100
Quality and regulatory		579			726			1,241			1,507
General and administrative		7,311			6,408			13,697			11,714
Other segment items (1)		(1,024	)		8,702			(14,410	)		12,612
Net loss	$	(8,322	)	$	(21,996	)	$	(6,326	)	$	(39,797	)

(1) Other segment items included in Net income 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):

	June 30, 2024		December 31, 2023
United States	$	5,008	$	5,381
France	$	727		1,010
All other countries		—		—
Long-lived assets	$	5,735	$	6,391

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19. 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 term of the lease was 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.

Consulting Agreements with KKG Enterprises, LLC and Remus Group Management, LLC

In the first quarter of 2023, Allurion entered into consulting agreements with KKG Enterprises, LLC (“KKG Enterprises”) and Remus Group Management, LLC (“Remus Group Management”) to assist Allurion in building out its AI platform, augment its AI advisory board, and provide advisory services related to the Business Combination. These agreements were tied to Allurion Board-related work by Krishna Gupta, who is a director of Allurion, CEO of Remus Group Management, principal at KKG Enterprises, and affiliated with Romulus Capital, a stockholder of Allurion. The agreements included payments of $0.2 million to KKG Enterprises and $0.3 million to Remus Group Management as board compensation to Krishna Gupta. These agreements were terminated on June 20, 2023.

Convertible Note with Hunter Ventures Limited

On February 15, 2023, Allurion sold $13 million of 2023 Convertible Notes to HVL and entered into a Side Letter with HVL, who is a limited partner of Romulus Growth Allurion L.P., which is a fund affiliated with Krishna Gupta (a director of Allurion; in addition, entities affiliated with him hold more than 5% of our outstanding common stock). Refer to Note 9, Debt for additional information regarding the 2023 Convertible Notes.

Consulting Agreement with Related Party

In September 2023, Allurion France, a French société par actions simplifiée and wholly-owned subsidiary of Allurion ("Allurion France"), entered into a new corporate officer agreement with the Company's then-Chief Commercial Officer and Benoit Chardon Consulting, a French société à responsabilité limitée which is solely owned by Mr. Chardon ("BCC"), pursuant to which BCC agreed to serve as Managing Director of Allurion France. The new corporate officer agreement provided that BCC would receive base consulting fees of €28,333.33 per month and additional variable compensation subject to the incentive plan terms issued annually by Allurion and conditional on meeting Allurion France and personal performance attainment defined each year by Allurion. This agreement was terminated on December 12, 2023 by virtue of the termination agreement described below, effective December 31, 2023.

Termination Agreement with Related Party

On December 12, 2023, Allurion France entered into a termination agreement with the Company's Chief Commercial Officer, Benoit Chardon, and BCC. Pursuant to the termination agreement, the parties agreed to terminate the corporate officer agreement as of December 31, 2023 and BCC resigned from its duties as managing director of Allurion France effective December 31, 2023; Allurion paid BCC all amounts due to it under the corporate officer agreement through December 31, 2023. In addition, Allurion paid BCC a lump-sum termination fee of $0.2 million.

Convertible Note Agreement with RTW

Pursuant to the Amended Note Purchase Agreement, on April 16, 2024, we issued and sold $48 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, and has the right to approve an additional director nominee for election at our 2024 annual meeting of stockholders (with such approval not to be unreasonably withheld), which such nominee shall go through our director nomination process led by the Nominating and Corporate Governance Committee of Allurion's board of directors. Refer to Note 9, Debt, for additional information regarding the RTW Convertible Notes.

RTW Participation in Public Offering

In connection with the Public Offering (as defined below), 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 (as defined below), the Company agreed to sell to RTW 2,260,159 shares of Series A Preferred Stock (as defined below), and 90,407 Private Placement Warrants (as defined below), for an aggregate purchase price of approximately $2.7 million. The Private Placement closed on July 1, 2024.

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20. Subsequent Events

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"). Pursuant to the Underwriting Agreement, the Company also granted the Underwriters an option exercisable for 30 days to purchase up to an additional 86,440 shares of Common Stock and/or 86,440 Public Offering Warrants at the public offering price. On July 1, 2024, the Underwriters exercised the option with respect to the Public Offering Warrants in full, which resulted in the issuance of an additional 86,440 Public Offering Warrants at the closing. The Public Offering closed on July 1, 2024 with total gross proceeds of $17.3 million, before deducting the Underwriters' discounts and commissions and estimated offering expenses payable by the Company. Further, the Underwriters exercised a portion of the option with respect to the Common Stock on July 5, 2024 for total gross proceeds of $2.3 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.

Private Placement

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, Series A non-voting convertible preferred stock, par value $0.0001 per share ("Series A Preferred Stock"), and 90,407 private placement warrants ("Private Placement Warrants") to purchase common stock, for an aggregate purchase price of approximately $2.7 million at a purchase price per share of Series A Preferred Stock and accompanying Private Placement Warrant equal to the per share Public Offering price for the shares of common stock and Public Offering Warrants in the Public Offering (the "Private Placement"). The Private Placement closed on July 1, 2024 with total gross proceeds received from RTW of $2.7 million.

French Regulatory Decision

On August 6, 2024, it was announced that the Agence Nationale de Sécurité du Médicament (“ANSM”), the French regulatory authority, has suspended sales of the Allurion Balloon in France, and the Company is withdrawing the device from the French market, pending implementation of a remediation plan to reduce certain risks associated with the advertising, follow-up program, and adverse events for the Allurion Balloon.

NYSE Letter

On August 12, 2024, we received a letter from NYSE notifying us that, as of August 8, 2024, for the last 30 consecutive business days, the average closing price of the Company’s common stock was less than $1.00 per share, the minimum average closing bid price required by the continued listing requirements of Rule 802.01C of the NYSE Listed Company Manual. A company can regain compliance with the minimum share price requirement at any time during the six-month cure period if, on the last trading day of any calendar month during the cure period, the company has (i) a closing share price of at least $1.00 and (ii) an average closing share price of at least $1.00 over the 30 trading-day period ending on the last trading day of that month. In the event that at the expiration of the six-month cure period, both a $1.00 closing share price on the last trading day of the cure period and a $1.00 average closing share price over the 30 trading-day period ending on the last trading day of the cure period are not attained, the NYSE will commence suspension and delisting procedures. We intend to monitor the closing bid price of our Common Stock and may, if appropriate, consider available options to regain compliance with the NYSE minimum share price requirement.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion and analysis includes information that our management believes is relevant to an assessment and understanding of our consolidated results of operations and financial condition. The discussion and analysis should be read together with the consolidated financial statements as of and for the three and six months ended June 30, 2024 and June 30, 2023, and for the years ended December 31, 2023 and December 31, 2022 that are included in our Annual Report on Form 10-K filed with the SEC on March 26, 2024, as amended by Amendment No. 1 to the Annual Report on Form 10-K filed with the SEC on April 28, 2024 and Amendment No. 2 to the Annual Report on Form 10-K filed with the SEC on August 28, 2025 (collectively, the "Annual Report on Form 10-K"). This discussion may contain forward-looking statements that involve risks and uncertainties. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth in the sections titled “Cautionary Statement Regarding Forward-Looking Statements,” “Risk Factors” in our Annual Report on Form 10-K and this Quarterly Report on Form 10-Q/A. For purposes of this section, all references in this discussion and analysis to “Allurion,” the “Company”, “we,” “us,” or “our” refers to the business and operations of Allurion and its consolidated subsidiaries following the consummation of the Business Combination and to Legacy Allurion and its consolidated subsidiaries prior to the consummation of the Business Combination. “Legacy Allurion” refers to Allurion Technologies, LLC, which was previously known as Allurion Technologies Opco, Inc. (formerly Allurion Technologies, Inc.) prior to the consummation of the Business Combination.

Restatement of Previously Issued Financial Statements; Reverse Stock Split

As discussed in the Explanatory Note to this Form 10-Q/A, the Company is restating its previously issued unaudited consolidated financial statements as of and for the three and six months ended June 30, 2024. As a result, the previously reported financial information as of and for the three and six months ended June 30, 2024 in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations” has been amended and restated to reflect the restatement. In addition, such financial information has been retroactively adjusted to reflect the results of a 1-to-25 reverse stock split effected by the Company on January 3, 2025 (the “Reverse Stock Split”). See Note 2 “Restatement of Previously Issued Financial Statements” and Note 1 “Organization and Basis of Presentation” to the unaudited consolidated financial statements included in this Form 10-Q/A for further detail regarding the restatement and the Reverse Stock Split, including descriptions of the adjustments and the impacts on our unaudited consolidated financial statements.

Other than the effects of the restatement and the Reverse Stock Split noted above, this section has not been otherwise modified and does not reflect any information or events occurring after August 14, 2024, the filing date of the Original Form 10-Q, or modify or update those disclosures affected by events that occurred at a later date or facts that subsequently became known to the Company, except to the extent they are otherwise required to be included and discussed herein.

Overview

Allurion is a leading medical device company that is focused on creating a best-in-class weight loss platform to treat obese and overweight patients. Our platform, the Allurion Program (the "Allurion Program"), features the world’s first and only swallowable, procedure-less intragastric balloon for weight loss (the "Allurion Balloon") and offers artificial intelligence ("AI")-powered remote patient monitoring tools, a proprietary behavior change program, secure messaging and video telehealth that are delivered by the Allurion Virtual Care Suite ("VCS").

Our proprietary intragastric balloon, the Allurion Balloon, is swallowed as a capsule under the guidance of a health care provider without surgery, endoscopy, or anesthesia for placement.

The Allurion VCS is comprised of tools to support patients’ weight loss experience, which we believe benefit both patients and health care providers:

1.For Allurion Program patients: Every current Allurion Program patient receives an Allurion Connected Scale ("Allurion Connected Scale") and access to our mobile app (the "App"), which integrates data from the Allurion Connected Scale to conveniently monitor weight, body fat, activity, sleep, and several other critical metrics. The App can also enable secure messaging and video telehealth with the patient’s care team and can deliver content from Allurion’s proprietary behavior change program—a library of 100 weight loss actions related to diet, nutrition, mental health, sleep, goal setting, and a number of other topics—directly to the patient. The App is available in 15 languages.

2.For Allurion Program providers: Our clinic dashboard ("Allurion Insights") provides end-to-end remote patient monitoring powered by the Allurion Iris AI platform, which leverages machine learning to deliver key insights related to patient tracking data. Allurion Insights offers real-time access to patient data and AI-powered analytics, note functionality to keep track of patient encounters, and clinic-wide metrics that provide a snapshot of the clinic’s overall performance.

In addition to its use by Allurion Balloon patients, we believe the Allurion VCS can potentially be a platform for optimal long-term follow up after other medical and surgical weight loss interventions in the future. For example, in June 2022, we incorporated a

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Treatment Tracking and Clinic-Led Onboarding feature into the Allurion VCS, which enables seamless onboarding and management of patients undergoing one or multiple weight loss treatments, including gastric balloons such as the Allurion Balloon, surgery, or medications. In addition, in connection with our collaboration with Medtronic plc (“Medtronic”), we may incorporate the Allurion VCS in onboarding and managing Medtronic’s patients. Further, in April 2024, the Company launched the Allurion VCS in the United States for patients utilizing other weight loss treatments, including anti-obesity medications and bariatric surgery.

Our products are currently sold in Europe, the Middle East, Africa, Latin America, Canada and the Asia-Pacific region. The U.S. Food and Drug Administration ("FDA") has approved the investigational device exemption ("IDE"), for Allurion’s AUDACITY clinical trial, a 48-week, prospective, randomized, open-label trial. We received approval of the IDE from the FDA in November 2021 to initiate the AUDACITY clinical trial in the United States. The first patient in the trial was treated in July 2022. During the third quarter of 2023, we completed the enrollment of 550 patients in the trial across 17 sites in the United States. The results of the trial are expected to support a premarket approval submission to the FDA.

Since our inception, we have incurred significant operating losses. Our ability to generate revenue and achieve cost improvements sufficient to achieve profitability will depend on the successful further development and commercialization of our products and receipt and maintenance of regulatory approvals. We generated revenue of $21.2 million and $27.0 million for the six months ended June 30, 2024 and 2023, respectively, and incurred net losses of $6.3 million (as restated) and $39.8 million for those same periods, respectively. We expect to continue to incur net losses for the foreseeable future as we focus on obtaining regulatory approvals for our products in new markets, reinstating regulatory approvals, refining our sales and marketing strategies, and continuing research and development efforts to further enhance our existing products. Further, following the closing of the Business Combination described below in “Recent Developments,” we have incurred, and expect to continue to incur, additional costs associated with operating as a public company. As a result, we will need additional funding for expenses related to our operating activities, including selling, marketing, general and administrative expenses and research and development expenses.

Because of the numerous risks and uncertainties associated with obtaining and maintaining regulatory approval, market acceptance of our product, product development and enhancement, and commercialization, we are unable to accurately predict the timing or amount of increased expenses or when, or if, we will be able to achieve or maintain profitability. Until such time, if ever, as we can generate substantial revenue sufficient to achieve profitability, we expect to finance our operations through a combination of equity offerings and debt financings. We may be unable to raise additional funds or enter into such other agreements or arrangements when needed on favorable terms, or at all. If we are unable to raise capital or enter into such agreements as, and when, needed, we may have to significantly delay, scale back or discontinue the further development and commercialization efforts of one or more of our products, or may be forced to reduce or terminate our operations. See the subsections titled — “Liquidity and Capital Resources” and “Recent Developments” below.

Recent Developments

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”). Allurion shares 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. Under this method of accounting, Compute Health, which was the legal acquirer, 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 our company issuing stock for the net assets of Compute Health, accompanied by a recapitalization. Our net assets and the net assets of Compute Health are stated at historical costs, with no goodwill

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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 (“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, in addition to the Reverse Stock Split. As a result of this retrospective application, certain prior period balances within the condensed consolidated financial statements have changed. Refer to Note 4, Business Combination in the notes to our unaudited interim condensed consolidated financial statements for further discussion regarding the closing of the Business Combination with Compute Health.

Note Purchase Agreement

On April 14, 2024, Allurion, RTW Investments, LP (together with its affiliates, “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 and the Principal Purchaser, entered into a Note Purchase Agreement (the “Original Note Purchase Agreement”). 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 “Amendment”; the Original Note Purchase Agreement, as amended by the Amendment, the “Amended Note Purchase Agreement”).

Pursuant to the Amended Note Purchase Agreement, the Company issued and sold $48 million aggregate principal amount of convertible senior secured notes (the “Notes”) to the Purchasers in a private placement transaction. The Company used the proceeds from the issuance of the Notes to refinance its outstanding obligations under the Fortress Credit Agreement in full and to pay fees and expenses in connection therewith and in connection with the transactions contemplated by the Amended Note Purchase Agreement. The Company has terminated and repaid in full the outstanding borrowings and other obligations under the Fortress Credit Agreement.

The Notes bear interest at the annual rate of 6.0%, which interest is payable quarterly in cash or, at the Company’s option, in kind for the first three years. The maturity date for the Notes is April 16, 2031. The Notes are guaranteed by Allurion Technologies, LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company (“Allurion Opco”), and certain other current and future subsidiaries of the Company, and are secured by substantially all the assets of the Company and the guarantors.

The Notes are convertible into shares of the Company's 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 $15,000,000 (the “Next Equity Financing”). On July 1, 2024, we consummated the Public Offering, as described elsewhere in this Quarterly Report on Form 10-Q/A, which constituted a Next Equity Financing. Because the conversion price was reset in connection with the Next Equity Financing to a price below the NYSE’s “Minimum Price” (as such term is defined in Section 312.03 of the NYSE Listed Company Manual), 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 Common Stock upon conversion of the Notes in excess of 1% of the number of shares of the Company’s Common Stock outstanding as of April 14, 2024. The Company is required to include a proposal in its definitive proxy statement on Schedule 14A seeking Stockholder Approval no later than December 31, 2025. If the Company does not obtain Stockholder Approval at such meeting, it shall call a special meeting of stockholders each 90-day period thereafter at least two times, and thereafter at each subsequent annual meeting until Stockholder Approval is obtained or the Notes are no longer outstanding; provided, that shares of Common Stock issued upon conversion of the Notes prior to obtaining Stockholder Approval shall not be entitled to vote in favor of Stockholder Approval.

Amendment to Revenue Interest Financing Agreement

On April 14, 2024, the Revenue Interest Financing Agreement (the "Original RIFA") 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, to reflect certain modifications agreed between the parties thereto in connection with the Purchasers’ purchase of the Notes and the refinancing of the Fortress Credit Agreement. Among other things, the RIFA Amendment waived the existing event of default under the Original RIFA, increased the rate of revenue interest payments to be paid to RTW on all current and future products and digital solutions developed and to be developed by the Company (the “Royalty Rate”) for net sales less than

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or equal to $100 million prior to December 31, 2026 from 6% to 12%, and increased the Royalty Rate on net sales less than or equal to $100 million on or after January 1, 2027 from 10% to 12%, subject to the terms and conditions of the RIFA Amendment.

Amendment to RTW Side Letter

On April 14, 2024, we, Allurion Opco and the Additional RIFA Investors entered into the First Amendment to Amended and Restated Letter Agreement (the “Side Letter Amendment”) to reflect certain modifications to the Existing Side Letter in connection with the Purchasers’ purchase of the Notes. The Side Letter Amendment provides, among other things, that the Additional RIFA Investors may make a single election in certain circumstances to convert up to $7,500,000 of the purchase price that the Additional RIFA Investors paid for certain equity interests in the Company into an amount of financing provided by the Additional RIFA Investors to Allurion Opco pursuant to an additional revenue interest financing agreement with Allurion Opco.

Termination of Fortress Term Loan

On April 16, 2024, we terminated and repaid in full all outstanding borrowings and fees under the Fortress Credit Agreement, dated as of August 1, 2023 (as amended by the Fortress Amendment, dated as of December 29, 2023), by and among the Company, Allurion Opco, the subsidiary guarantors from time to time party thereto, the lenders from time to time party thereto (the "Lenders" and each, a "Lender") and Fortress Credit Corp., as administrative agent for the Lenders, including the release of all guarantees and liens related thereto.

Public Offering

On June 28, 2024, we 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 we 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"). Pursuant to the Underwriting Agreement, we also granted the Underwriters an option exercisable for 30 days to purchase up to an additional 86,440 shares of Common Stock and/or 86,440 Public Offering Warrants at the public offering price. On July 1, 2024, the Underwriters exercised the option with respect to the Public Offering Warrants in full, which resulted in the issuance of an additional 86,440 Public Offering Warrants at the closing. The Public Offering closed on July 1, 2024. Gross proceeds from the Public Offering were $17.3 million, before deducting the Underwriters' discounts and commissions and estimated offering expenses payable by the Company. The Underwriters exercised a portion of the option on July 5, 2024 for total gross proceeds of $2.3 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.

Private Placement

On June 28, 2024, we entered into a subscription agreement (the "Subscription Agreement") with funds affiliated with RTW, pursuant to which the Company agreed to sell to RTW 2,260,159 shares of a newly created series of preferred stock, Series A non-voting convertible preferred stock, par value $0.0001 per share ("Series A Preferred Stock"), and 90,407 private placement warrants ("Private Placement Warrants") to purchase Common Stock, for an aggregate purchase price of approximately $2.7 million at a purchase price per share of Series A Preferred Stock and accompanying Private Placement Warrant equal to the per share Public Offering price for the shares of Common Stock and Public Offering Warrants in the Public Offering (the "Private Placement"). The Private Placement closed on July 1, 2024 with total gross proceeds received from RTW of $2.7 million.

French Regulatory Decision

On August 6, 2024, it was announced that the Agence Nationale de Sécurité du Médicament (“ANSM”), the French regulatory authority, has suspended sales of the Allurion Balloon in France, and the Company is withdrawing the device from the French market, pending implementation of a remediation plan to reduce certain risks associated with the advertising, follow-up program, and adverse events for the Allurion Balloon.

Although the Company disagrees with ANSM’s decision, it is fully cooperating and in active dialogue with the agency in developing a remediation program prioritizing changes related to its advertising strategy, follow-up program and training programs to address ANSM’s concerns. The Company is committed to continuing its engagement with ANSM to identify a path that will enable the Company to resume the commercialization of the Allurion Balloon in France.

NYSE Letter

On August 12, 2024, we received a letter from NYSE notifying us that, as of August 8, 2024, for the last 30 consecutive business days, the average closing price of the Company’s common stock was less than $1.00 per share, the minimum average closing bid price required by the continued listing requirements of Rule 802.01C of the NYSE Listed Company Manual. A company can regain compliance with the minimum share price requirement at any time during the six-month cure period if, on the last trading day of any calendar month during the cure period, the company has (i) a closing share price of at least $1.00 and (ii) an average closing share price of at least $1.00 over the 30 trading-day period ending on the last trading day of that month. In the event that at the expiration of the six-month cure period, both a $1.00 closing share price on the last trading day of the cure period and a $1.00 average

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closing share price over the 30 trading-day period ending on the last trading day of the cure period are not attained, the NYSE will commence suspension and delisting procedures. We intend to monitor the closing bid price of our Common Stock and may, if appropriate, consider available options to regain compliance with the NYSE minimum share price requirement.

Key Factors Affecting Our Operating Results

We believe that our performance and future success depend on many factors that present significant opportunities but also pose risks and challenges, including those discussed below and in the “Risk Factors” section of this Quarterly Report on Form 10-Q/A and our Annual Report on Form 10-K.

•Market Acceptance. The growth of our business depends on our ability to gain broader acceptance of our current products by continuing to make health care providers aware of the benefits of our products to generate increased demand and frequency of use, and thus increase our sales. Our ability to grow our business will also depend on our ability to expand our customer base in existing or new target markets. Although we have increased the number of patients treated with our products through our established relationships and focused sales efforts, we cannot provide assurance that our efforts will continue to increase the use of our products.

•Regulatory approval and timing and efficiency of new product introductions. We must successfully obtain timely approvals, maintain regulatory approval, successfully implement any remediation programs required by regulators to resume sales of the Allurion Balloon, and introduce new products that gain acceptance with health care providers. For our sales to grow, we will also need to obtain regulatory approval of our existing product and any new products or modifications/enhancements to our existing products in the markets that we operate in and new markets as applicable.

•Sales force size and effectiveness. The speed at which newly hired salespeople become effective can impact our revenue growth or our costs incurred in anticipation of such growth. We intend to continue to improve and increase performance in our sales and marketing organization, and expand our international programs to help facilitate further adoption of our products as well as broaden awareness of our products to new customers.

•Product and geographic mix; timing. Our financial results, including our gross margins, may fluctuate from period to period based on the timing of orders, fluctuations in foreign currency exchange rates and the number of available selling days in a particular period, which can be impacted by a number of factors, such as holidays or days of severe inclement weather in a particular geography, the mix of products sold and the geographic mix of where products are sold.

Operating Segments

We operate our business in a single segment and as one reporting unit, which is how our chief operating decision maker ("CODM"), our chief executive officer, reviews financial performance and allocates resources. The CODM reviews financial information presented on a regular basis at the consolidated level for purposes of allocating resources and evaluating financial performance. Since we operate as one operating segment, all required financial segment information can be found in the consolidated financial statements.

Components of Our Results of Operations

Revenue

We derive revenue from the sale of the Allurion Balloon to customers, which are either distributors or health care providers. The Allurion Balloon is the foundation of the Allurion Program, a holistic weight loss program that offers patients the opportunity to receive, and clinic and other health care providers the ability to deliver, behavior change assistance through their use of our remote patient support and monitoring tools.

Cost of Revenue

Cost of revenue consists primarily of costs that are closely correlated or directly related to the delivery of our products, including material costs, labor costs, and depreciation expense for fixed assets.

Operating Expenses

Sales and Marketing Expenses

Sales and marketing expenses consist primarily of salaries and related expenses (including commissions) for our sales and marketing personnel. Marketing programs consist of advertising, training events, brand building, product marketing activities and shipping costs.

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Research and Development Expenses

Our research and development expenses consist of costs associated with performing research and development activities such as registering our products in various jurisdictions and performing clinical trials. These costs include salaries and benefits, stock-based compensation, non-capitalizable software development costs, product development costs, materials and supplies, clinical trial activities, registration expenses, depreciation of equipment and other outside services.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and personnel-related costs, including stock-based compensation, for our personnel in executive, information technology, finance and accounting, human resources and other administrative functions. General and administrative expenses also include legal fees relating to corporate matters; professional fees paid for accounting, auditing, consulting and tax services; insurance costs; travel expenses; office and information technology costs; and facilities, depreciation and other expenses related to general and administrative activities, which include direct or allocated expenses for rent and maintenance of facilities and utilities.

Other Income (Expense), Net

Interest Expense

Interest expense consists of interest expense associated with outstanding borrowings under our debt obligations as well as the amortization of debt issuance costs and discounts associated with such borrowings.

Change in Fair Value of Warrants

The change in fair value of warrants consists of the expense recognized upon the mark to market of our warrant liabilities.

Change in Fair Value of Debt

The change in fair value of debt consists of the expense recognized upon the mark to market of our convertible debt.

Change in Fair Value of Revenue Interest Financing and PIPE Conversion Option

The change in fair value of Revenue Interest Financing and PIPE Conversion Option consists of the expense recognized upon the mark to market of the Revenue Interest Financing with RTW and the issuance and mark to market of the PIPE Conversion Option. See Note 11, Fair Value Measurements for further information.

Change in Fair Value of Earn-out Liabilities

The change in fair value of earn-out liabilities consists of the gain or loss recognized upon mark to market of the contingent earn-out consideration. See Note 11, Fair Value Measurements for further information.

Loss on extinguishment of debt

The loss on extinguishment of debt consists of the loss recognized upon the termination of our Fortress Term Loan.

Termination of convertible note side letters

The termination of convertible note side letters consists of the expense recognized related to the convertible note prepayment penalty and recognition of the PubCo Share liability and Base PubCo and Backstop Share liability.

Other Income (Expense), net

Other income (expense), net consists of interest earned on our invested cash balances, which primarily consist of deposit accounts and money market funds, foreign currency transaction gains and losses and expense associated with our Success Fee derivative liability and Fortress Term Loan derivative liability. See Note 11, Fair Value Measurements, for further information.

Results of Operations

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Comparison of the Three and Six Months Ended June 30, 2024 and 2023 (unaudited)

The following table summarizes our results of operations for the three and six months ended June 30, 2024 and 2023 (in thousands):

	Three Months Ended June 30,									Six Months Ended June 30,
	2024			2023			Change			2024			2023			Change
	(Restated)						(Restated)			(Restated)						(Restated)
Revenue	$	11,766		$	12,960		$	(1,194	)	$	21,152		$	27,031		$	(5,879	)
Cost of revenue		2,773			2,992			(219	)		5,293			5,932			(639	)
Gross profit		8,993			9,968			(975	)		15,859			21,099			(5,240	)
Operating expenses:
Sales and marketing		6,718			10,273			(3,555	)		12,863			22,137			(9,274	)
Research and development		4,310			6,581			(2,271	)		10,035			14,433			(4,398	)
General and administrative		7,311			6,408			903			13,697			11,714			1,983
Total operating expenses:		18,339			23,262			(4,923	)		36,595			48,284			(11,689	)
Loss from operations		(9,346	)		(13,294	)		3,948			(20,736	)		(27,185	)		6,449
Other income (expense):
Interest expense		(339	)		(2,508	)		2,169			(2,270	)		(4,745	)		2,475
Changes in fair value of warrants		1,376			(204	)		1,580			4,507			(1,679	)		6,186
Change in fair value of debt		8,070			2,257			5,813			8,070			2,257			5,813
Changes in fair value of Revenue Interest Financing and PIPE conversion option		(5,994	)		—			(5,994	)		(8,094	)		—			(8,094	)
Changes in fair value of earn-out liabilities		5,690			—			5,690			19,880			—			19,880
Loss on extinguishment of debt		(8,713	)		—			(8,713	)		(8,713	)		—			(8,713	)
Termination of convertible note side letters		—			(8,134	)		8,134			—			(8,134	)		8,134
Other income (expense), net		999			(91	)		1,090			1,171			(255	)		1,426
Total other income (expense):		1,089			(8,680	)		9,769			14,551			(12,556	)		27,107
Income (loss) before income taxes:		(8,257	)		(21,974	)		13,717			(6,185	)		(39,741	)		33,556
Provision for income taxes:		(65	)		(22	)		(43	)		(141	)		(56	)		(85	)
Net income (loss)	$	(8,322	)	$	(21,996	)	$	13,674		$	(6,326	)	$	(39,797	)	$	33,471

Revenue

Revenue decreased $1.2 million, or 9%, to $11.8 million and decreased $5.8 million, or 22%, to $21.2 million for the three and six months ended June 30, 2024, respectively, compared to the same period in 2023. The decrease in revenue was primarily the result of decreased gastric balloon units sold due to lower re-order rates as distributors and certain accounts adjusted their inventory levels. The decrease in revenue was also attributable to selling less or no product to certain distributors and accounts to manage our credit risk.

Cost of Revenue

Cost of revenue decreased $0.2 million, or 7%, to $2.8 million for the three months ended June 30, 2024, and decreased $0.6 million, or 11%, to $5.3 million for the six months ended June 30, 2024 compared to the same periods in 2023. The decrease in cost of revenue was a direct result of decreased gastric balloon units sold, partially offset by an increase in manufacturing expense, as less labor and overhead was absorbed due to lower production volumes.

Gross Profit

Gross profit decreased $1.0 million, or 10%, to $9.0 for the three months ended June 30, 2024, and decreased $5.2 million, or 25%, to $15.9 million for the six months ended June 30, 2024 compared to the same periods in 2023. The decrease in gross profit was primarily the result of an increase in our manufacturing expense, as less labor and overhead was absorbed due to lower production volumes, as well as a decrease in revenue and sales volume of our gastric balloon system.

Operating Expenses

Sales and Marketing Expenses

Sales and marketing expenses decreased $3.6 million, or 35%, to $6.7 million for the three months ended June 30, 2024, compared to the same period in 2023. The decrease in sales and marketing expenses was the result of a $2.2 million decrease in marketing spend driven by a reorganization of our selling and marketing spend focusing on more efficient channels and geographies, a

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$1.1 million decrease in salaries, related benefits, and consulting costs, a $0.1 million decrease in travel expenses, and a $0.1 million decrease in shipping and logistics expenses.

Sales and marketing expenses decreased $9.3 million, or 42%, to $12.8 million for the six months ended June 30, 2024, as compared to the same period in 2023. The decrease in sales and marketing expenses was the result of a $4.6 million decrease in marketing spend, a $1.6 million decrease in salaries, related benefits, and consulting costs, a $1.5 million decrease in shipping and logistics expenses, a $0.8 million decrease in meeting expenses, and a $0.5 million decrease in travel expenses.

Research and Development Expenses

Research and development expenses decreased $2.3 million, or 35%, to $4.3 million for the three months ended June 30, 2024, compared to the same period in 2023. The decrease in research and development expenses was primarily the result of a $1.1 million decrease in costs related to the AUDACITY clinical trial as it nears completion, a $0.7 million decrease attributable to salaries and related benefit costs due to lower headcount, and a $0.3 million decrease in outside consulting costs.

Research and development expenses decreased $4.4 million, or 30%, to $10.0 million for the six months ended June 30, 2024, compared to the same period in 2023. The decrease in research and development expenses was primarily the result of a $2.4 million decrease in costs related to the AUDACITY clinical trial as it nears completion, a $1.4 million decrease attributable to salaries and related benefit costs due to lower headcount, and a $0.5 million decrease in outside consulting costs. We expect research and development expenses to continue to decrease in 2024 as our AUDACITY trial progresses toward completion.

General and Administrative Expenses

General and administrative expenses increased $0.9 million, or 14%, to $7.3 million for the three months ended June 30, 2024, compared to the same period in 2023. The increase in general and administrative expenses was primarily the result of a $1.8 million increase in legal and professional fees, inclusive of $1.4 million in one-time legal fees in connection with the Amended Note Purchase Agreement with RTW, a $0.4 million increase in stock based compensation, a $0.3 million increase attributable to salaries, benefits and related costs, and a $0.2 million increase in insurance expense related to director and officer insurance. These increases were partially offset by a $1.9 million decrease in bad debt expense.

General and administrative expenses increased $2.0 million, or 17%, to $13.7 million for the six months ended June 30, 2024, compared to the same period in 2024. The increase in general and administrative expenses was primarily the result of a $2.6 million increase in legal and professional fees, inclusive of $1.4 million in one-time legal fees in connection with the Amended Note Purchase Agreement with RTW, a $1.2 million increase attributable to salaries, benefits, and related costs, a $0.6 million increase in stock based compensation expense, and a $0.5 million increase in insurance expense related to director and officer insurance. These increases were partially offset by a $2.9 million decrease in bad debt expense.

Other income (expense)

Interest Expense

Interest expense decreased $2.2 million, or 86%, to $0.3 million for the three months ended June 30, 2024 and $2.5 million, or 52%, to $2.3 million for the six months ended June 30, 2024, compared to the same periods in 2023. The decrease in interest expense was due the termination of our Fortress Term Loan in April 2024, as well as a reduction in principal of our Fortress Term Loan as compared to our 2021 Term Loan during the comparable six month period.

Change in Fair Value of Warrants

The $1.6 million gain and $6.2 million gain attributable to the change in fair value of warrants for the three and six months ended June 30, 2024, respectively, compared to the same periods in 2023, were due to mark to market fluctuations in our warrant liabilities due to the decline in value of our Common Stock during the periods.

Change in Fair Value of Debt

The $5.8 million gain (as restated) attributable to the change in fair value of debt for each of the three and six months ended June 30, 2024, compared to the same periods in 2023, was due to mark to market fluctuations in our convertible debt.

Change in Fair Value of Revenue Interest Financing and PIPE Conversion Option

The less than $6.0 million loss (as restated) attributable to the change in fair value of the Revenue Interest Financing and PIPE Conversion Option for the three months ended June 30, 2024, compared to the same period in 2023, was primarily due to a $2.1 million gain related to the change in fair value in the PIPE Conversion Option due to a decrease in the Company's stock price from March 31, 2024 to June 30, 2024, offset by a $8.1 million loss (as restated) in the change in fair value of the Revenue Interest Financing. The $8.1 million loss (as restated) attributable to the change in fair value of Revenue Interest Financing and PIPE Conversion Option for the six months ended June 30, 2024, compared to the same period in 2023 was primarily due to a $9.1 million loss (as restated) related to the change in fair value in the Revenue Interest Financing from December 31, 2023 to June 30, 2024 and a $1.0 million gain (as restated) in the change in fair value of the PIPE Conversion Option from December 31, 2023 to June 30, 2024.

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Change in Fair Value of Earn-Out Liabilities

The $5.7 million gain attributable to the change in the fair value of earn-out liabilities for the three months ended June 30, 2024 and the $19.9 million gain attributable to the change in the fair value of the earn-out liabilities for the six months ended June 30, 2024 were due to the decrease in the Company's stock price from December 31, 2023 to June 30, 2024.

Loss on extinguishment of debt

The $8.7 million loss attributable to the loss on extinguishment of debt for both the three and six months ended June 30, 2024 was due to the loss on extinguishment of our Fortress Term Loan in April 2024.

Termination of convertible note side letters

Termination of convertible note side letters decreased $8.1 million, or 100%, to zero for both the three and six months ended June 30, 2024, compared to the same periods in 2023. The decrease was primarily due to $3.3 million of expense related to the PubCo Share liability, $3.3 million of expense related to the Base PubCo Share and Backstop Share liability, and a $1.5 million prepayment penalty related to repayment of the Company’s Allurion Convertible Note with HVL during the comparable periods.

Other Income (Expense), Net

The change in Other income (expense), net for the three months ended June 30, 2024 compared to the same period in 2023 was a gain of $1.1 million primarily driven by a $2.0 million gain related to the write-off of the term loan derivative liability to zero in connection with the termination of the Fortress Term Loan, partially offset by a $1.1 million loss related to the Amended Note Purchase Agreement. The change in Other income (expense), net for the six months ended June 30, 2024 compared to the same period in 2023, was a gain of $1.4 million driven by a $2.0 million gain related to the write-off of the term loan derivative liability to zero and $0.8 million of interest income, partially offset by a $1.1 million loss related to the Amended Note Purchase Agreement and a $0.4 loss related to fluctuations in exchange rates of foreign currencies.

Provision for Income Taxes

We recorded a provision for income taxes of $0.1 million for the three and six months ended June 30, 2024. These provisions for income taxes are due to net income in certain foreign jurisdictions.

Liquidity and Capital Resources

Since our inception, we have primarily obtained cash to fund our operations through the sale of Allurion preferred stock and common stock, issuance of term loans, royalty arrangements, and issuance of convertible debt instruments. As of June 30, 2024, we had $19.3 million in cash and cash equivalents. We incurred losses of $6.3 million (as restated) and $39.8 million for the six months ended June 30, 2024 and 2023, respectively. We incurred cash outflows from operating activities of $17.6 million and $20.0 million during the six months ended June 30, 2024 and 2023, respectively. As of June 30, 2024, we had an accumulated deficit of $221.3 million (as restated). We expect to continue to generate significant operating losses for the foreseeable future.

Our future capital requirements will depend on many factors, including:

•the emergence of competing innovative weight loss experiences and other adverse marketing developments;

•the timing and extent of our sales and marketing and research and development expenditures; and

•any investments or acquisitions we may choose to pursue in the future.

Our revenue for the six months ended June 30, 2024 was $21.2 million, which represented a quarter-over-quarter decrease of 22%. The decrease in revenue was primarily the result of lower re-order rates as distributors and certain accounts adjusted their inventory levels. The decrease in revenue was also attributable to selling less or no product to certain distributors and accounts to manage our credit risk. If our current cash and anticipated revenue and resulting cash flows from operations are insufficient to satisfy our liquidity requirements, due to increased expenditures, lower demand for or sales of our gastric balloon system, the occurrence of other events or the realization of the risks described in this Quarterly Report on Form 10-Q/A or our Annual Report on Form 10-K under the heading "Risk Factors," we may be required to raise additional capital through the issuances of public or private equity or debt financing or other capital sources earlier than expected.

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. We may be unable to increase our revenue, successfully complete remediation programs to resume sales of the Allurion Balloon, raise additional funds or enter into such other agreements or arrangements when needed on favorable terms, or at all. If we fail to increase our revenue, successfully complete remediation programs to resume sales of the Allurion Balloon, raise capital or enter into such agreements as and when needed, we may have to significantly delay, scale back or discontinue our operations or the development and commercialization of one or more of our product candidates and other strategic initiatives. Based on our recurring losses from

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operations incurred since inception, the expectation of continuing operating losses for the foreseeable future, and the potential need to raise additional capital to finance our future operations and debt service payments, we have concluded that there is substantial doubt about our ability to continue as a going concern for a period of one year from the date that the consolidated financial statements included in this Quarterly Report on Form 10-Q/A are issued.

Financing Arrangements

Public Offering and Concurrent Private Placement

On July 1, 2024, we received $17.3 million in gross proceeds from issuance of 576,261 shares of Common Stock and 662,701 Public Offering Warrants and $2.7 million in gross proceeds from the sale and issuance of 2,260,159 shares of Series A Preferred Stock, and 90,407 Private Placement Warrants in the Private Placement, in each case at an offering price of $30.00 per share and accompanying warrant. On July 5, 2024, the Underwriters partially exercised their option to purchase an additional 77,091 shares of Common Stock for additional gross proceeds of $2.3 million.

Note Purchase Agreement

On April 16, 2024, we received $48 million in gross proceeds from the Amended Note Purchase Agreement with RTW, which proceeds were used to repay all outstanding principal, accrued and unpaid interest and other obligations with respect to the Fortress Term Loan.

As of June 30, 2024, $48.0 million of the RTW Convertible Notes remain outstanding and are included in convertible notes payable, net of discounts on our consolidated balance sheets. See Note 9, Debt, in the notes to our unaudited interim condensed consolidated financial statements for the three and six months ended June 30, 2024 and 2023 included within this Quarterly Report on Form 10-Q/A for additional details regarding the RTW Convertible Notes.

Chardan Purchase Agreement

On December 18, 2023, we entered into the Purchase Agreement with Chardan. Pursuant to the Purchase Agreement, we have the right from time to time at our option to sell to Chardan up to the lesser of (i) $100,000,000 in aggregate gross purchase price of newly issued shares of our Common Stock, and (ii) the Exchange Cap.

As of June 30, 2024, we have received $0.4 million in net proceeds from sales of shares of our Common Stock pursuant to the Purchase Agreement with Chardan.

Revenue Interest Financing Agreement

On August 1, 2023, we received $40.0 million in proceeds from the Revenue Interest Financing Agreement with RTW, which matures in December 2030. We entered into the Revenue Interest Financing Agreement on February 9, 2023 and received the proceeds at the closing of the Business Combination. The Revenue Interest Financing Agreement is included in Revenue Interest Financing liability on our consolidated balance sheet as of June 30, 2024. On April 14, 2024, the Revenue Interest Financing Agreement was amended to, among other things, increase the rate of revenue interest payments to be paid to RTW. See Note 10, Revenue Interest Financing, Side Letter, and PIPE Conversion Option in the notes to our unaudited interim condensed consolidated financial statements for the three and six months ended June 30, 2024 and 2023 included within this Quarterly Report on Form 10-Q/A for additional details regarding the Revenue Interest Financing Agreement.

Material Cash Requirements for Known Contractual and Other Obligations

Leases

We have entered into various non-cancellable operating leases for our corporate office, manufacturing facilities, research and development labs, management office space and certain equipment. The leases have varying terms expiring between 2024 and 2028. See Note 17, Commitments and Contingencies of the notes to our unaudited interim condensed consolidated financial statements for the three and six months ended June 30, 2024 and 2023 for additional details related to our noncancelable operating leases.

RTW Convertible Notes

On April 16, 2024, we received $48 million in gross proceeds from the Amended Note Purchase Agreement with RTW, which proceeds were used to repay all outstanding principal, accrued and unpaid interest and other obligations with respect to the Fortress Term Loan.

Revenue Interest Financing

We received $40.0 million in proceeds from the Revenue Interest Financing Agreement with RTW on August 1, 2023. In exchange, we are 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 certain specified rates. On April 14, 2024, the Revenue Interest Financing Agreement was amended to, among other things, increase the rate of revenue interest payments to be paid to RTW for net sales less than or equal to $100 million prior to

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December 31, 2026 from 6% to 12%, and increase the royalty rate on net sales less than or equal to $100 million on or after January 1, 2027 from 10% to 12%.

If RTW has not received aggregate revenue interest payments equal to at least 100% of the Investment Amount by December 31, 2027, we 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, we must make a cash payment in an amount sufficient to catch RTW up to 240% of the Investment Amount.

Research and Development Costs

We are continuing to invest in our U.S. FDA AUDACITY clinical trial and have entered into contractual obligations with each clinical trial site. Each contract shall continue until the completion of the trial at that site, which is approximately 48 weeks from the start of each contract. Our clinical trial costs are dependent on, among other things, the size, number, and length of our clinical trial. We also incur research and development costs related to the enhancement of our existing products.

Other Capital Requirements

We enter into agreements in the normal course of business with various vendors, which are generally cancelable upon notice. Payments due upon cancellation typically consist only of payments for services provided or expenses incurred, including non-cancelable obligations of service providers, up to the date of cancellation.

Cash Flows

The following table sets forth a summary of cash flows for the periods presented:

	Six Months Ended June 30,
(In thousands)	2024			2023
Net cash used in operating activities	$	(17,563	)	$	(20,017	)
Net cash used in investing activities		(539	)		(408	)
Net cash provided by (used in) financing activities		(673	)		17,507
Net increase (decrease) in cash and cash equivalents, and    restricted cash	$	(18,775	)	$	(2,918	)

Net Cash Used in Operating Activities

Six Months Ended June 30, 2024 (Restated) and 2023

During the six months ended June 30, 2024, net loss of $6.3 million ( as restated) and net cash provided by changes in our operating assets and liabilities of $1.5 million were more than offset by non-cash income of $12.8 million (as restated), resulting in cash used from operating activities of $17.6 million.

Non-cash income consisted of $19.9 million of income related to the change in fair value of our earn-out liabilities, $8.1 million of income (as restated) related to the change in fair value of our convertible debt, $4.5 million of mark to market adjustments related to our warrant liabilities, $1.9 million of income related to the change in fair value of our term loan derivative liability, $1.4 million of debt issuance costs associated with debt at fair value, and $1.1 million of interest paid on debt recorded at fair value. This non-cash income was partially offset by a $8.7 million loss on the extinguishment of our Fortress Term Loan, an $8.1 million loss (as restated) related to the change in fair value of the Revenue Interest Financing and PIPE Conversion Option, $1.5 million of non-cash interest expense, $1.4 million of stock-based compensation expenses, $0.6 million of depreciation and amortization expense, $0.4 million of non-cash lease expense, $0.4 million of unrealized loss on foreign exchange, and a $0.4 million provision for inventory.

Net cash provided by changes in our operating assets and liabilities consisted of a $4.4 million decrease in accounts receivable, a $1.0 million decrease in inventory, and a $0.7 million decrease in prepaid expenses, other current and long-term assets, partially offset by a net $4.2 million decrease in accounts payable, accrued expenses and other current liabilities and a $0.4 million decrease in our lease liabilities.

The decrease in accounts receivable was the result of an increase in cash collections and decrease in revenue. The decrease in inventory was primarily related to a decrease in finished goods and work in progress. The decrease in prepaid expenses, other current and long-term assets was primarily related to a decrease in prepaid inventory and payroll deposits. The net decrease in accounts payable, accrued expenses and other current liabilities was primarily related to decreased expenses and timing of payments.

During the six months ended June 30, 2023, operating activities used $20.0 million of cash, resulting from a net loss of $39.8 million, partially offset by net cash provided by changes in our operating assets and liabilities of $7.9 million and non-cash charges of $11.9 million.

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Non-cash charges consisted of a $6.6 million charge for other non-cash expenses related to the PubCo Additional Share liability and Base PubCo Shares and Backstop Share liability, a $2.8 million provision for uncollectible accounts, $1.7 million of mark to market adjustments related to our warrant and derivative liabilities, $0.8 million of depreciation and amortization expense, $0.8 million of stock-based compensation expense, $0.8 million of non-cash interest expense primarily related to the accretion of debt discount associated with our outstanding debt arrangements, a $0.5 million provision for inventory, and $0.1 million of unrealized loss on foreign exchange. The charges were partially offset by $2.3 million of non-cash income related to the change in fair value of convertible debt.

Net cash provided by changes in our operating assets and liabilities consisted of a net $8.2 million increase in accounts payable, accrued expenses and other current liabilities, and a $0.9 million decrease in accounts receivable, partially offset by a $1.5 million increase in inventory.

The net increase in accounts payable, accrued expenses and other current liabilities was primarily related to increased expenses as well as timing of payments. The decrease in accounts receivable was primarily related to cash collections. The increase in inventory was primarily related to an increase in work in progress and finished goods.

Net Cash Used in Investing Activities

Six Months Ended June 30, 2024 and 2023

During the six months ended June 30, 2024 and June 30, 2023, cash used in investing activities was $0.5 million and $0.4 million, respectively, consisting of purchases of property and equipment.

Net Cash Provided by (Used in) Financing Activities

Six Months Ended June 30, 2024 and 2023

During the six months ended June 30, 2024, cash used in financing activities was $0.7 million, consisting of a $47.7 million repayment of the Fortress Term Loan and a $1.4 million payment of debt issuance costs, partially offset by $48.0 million in proceeds from the issuance of convertible notes and $0.4 million of proceeds from our equity line financing.

During the six months ended June 30, 2023, cash provided by financing activities was $17.5 million, consisting of $19.6 million from the issuance of our 2023 Convertible Notes, net of issuance costs, partially offset by $1.6 million of payments of deferred financing costs and a $0.5 million repayment of our 2023 Convertible Notes.

Critical Accounting Policies and Estimates

Our consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States. The preparation of our consolidated financial statements and related disclosures requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, costs and expenses, and the disclosure of contingent assets and liabilities in our consolidated financial statements. We base our estimates on historical experience, known trends and events and various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions or conditions. While our significant accounting policies are described in more detail in Note 3, Summary of Significant Accounting Policies, to our audited consolidated financial statements included in our Annual Report on Form 10-K, we believe that the following accounting policies are those most critical to the judgments and estimates used in the preparation of our consolidated financial statements.

Revenue Recognition

We account for revenue in accordance with Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (“Topic 606” or “ASC 606”). In accordance with ASC 606, we recognize revenue when control of our products is transferred to our customers in an amount that reflects the consideration we expect to receive in exchange for those products. Our 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.

Revenue is generated primarily from the sale of our gastric balloon system, which includes the Allurion Balloon and related accessories. We have provided customers purchasing the Allurion Balloon with an implied license for access to our Allurion 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. As such, it has been deemed an immaterial promise in the context of the contract, and we do not consider the license as a separate performance obligation. In the future, if and when Allurion VCS services are determined to be a performance obligation, we expect the associated consideration will be deferred and recognized over the license period.

We sell our products directly to customers through our direct sales personnel and indirectly through independent distributors. For distributor sales, we sell our products to our distributors, who subsequently resell the products to health care providers, among

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others. For direct sales, our products are sold directly to our customers, which are typically health care providers. Generally, customer contracts contain Free on Board or Ex-Works shipping point incoterms. We recognize revenue when the customer obtains control of our product, which typically occurs upon shipment, in return for agreed-upon, fixed-price consideration.

Additionally, from time to time, we offer certain incentives to our customers, which are recorded as a reduction of revenue in the period the related product revenue is recognized. Any discounts we offer are outlined in our customer agreements. Payments to the customer for a distinct good or service that reasonably estimates the fair value of the distinct benefit received, such as marketing programs and shipping and logistics services, are recorded as a selling and marketing expense.

Our payment terms are consistent with prevailing practice in the respective markets in which we do business, which are not affected by contingent events that could impact the transaction price. Our contracts with customers do not provide general rights of return unless certain product quality standards are not met.

Valuation of Earn-Out Liabilities

In connection with the Business Combination, 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 additional shares of our Common Stock (the “Earn-Out Shares”) upon the achievement of certain earn-out targets. As the contingent earn-out consideration contains a settlement provision that precludes it from being indexed to our stock, it is classified as a liability under ASC 480, as defined in Note 3, Summary of Significant Accounting Policies. The fair value of contingent earn-out consideration is estimated as of the acquisition date at the present value of the expected contingent payments using a Monte Carlo Simulation Method. This method utilizes a combination of observable (Level 2) and unobservable (Level 3) inputs, which include the trading price and volatility of the underlying common stock, expected term, risk-free interest rates, and expected date of a qualifying event. The determination of the fair value of these financial instruments is complex and highly judgmental due to the significant estimation required. In particular, the fair value estimate is sensitive to certain assumptions, such as the volatility of underlying shares.

Changes in the estimated fair value of the contingent earn-out consideration are recorded in Other income (expense) in the condensed consolidated statements of operations and are reflected in the period in which they are identified. Changes in the estimated fair value of the continent earn-out consideration may materially impact or cause volatility in our operating results.

Valuation of Revenue Interest Financing and PIPE Conversion Option

In connection with the Business Combination, we entered into the Revenue Interest Financing Agreement with RTW, under which the Company received $40.0 million upfront. In exchange, we are 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 until December 31, 2030. We account 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 containing embedded features wherein 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 at each reporting period date. The fair value of the Revenue Interest Financing is calculated using a discounted cash flow method under the income approach utilizing future revenue projections and a discount rate. Changes in the estimated fair value of the Revenue Interest Financing Agreement are recorded as a component of Other income (expense) in the condensed 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 into the Revenue Interest Financing, we and RTW entered into the RTW Side Letter under which RTW may elect to convert up to $7.5 million of its initial PIPE subscription into an additional revenue interest financing by forfeiting a number of shares of our Common Stock acquired by the RTW in its PIPE Investment. We account for this PIPE Conversion Option as a freestanding financial instrument that qualifies for derivative liability accounting in accordance with ASC 815, Derivatives and Hedging. The fair value of the PIPE Conversion Option is measured using a MCSM using a combination of observable (Level 2) and unobservable (Level 3) inputs, which include the number of shares convertible, the stock price of the underlying common stock, volatility, risk-free rates, and expected term. The PIPE Conversion Option is initially measured at its fair value within Other liabilities on the condensed 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 condensed consolidated statements of operations.

Valuation of RTW Convertible Notes

We entered into the Amended Note Purchase Agreement with RTW on April 16, 2024, under which the Company issued and sold $48.0 million aggregate principal amount of convertible senior secured notes. We account for the RTW Convertible Notes under the FVO election of ASC 825, as the Amended Note Purchase Agreement is a financial instrument containing embedded features

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whereas the entire financial instrument is 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. The fair value of the RTW Convertible Notes is measured using a discounted cash flow method under the income approach with a MCSM used to determine the simulated stock price at each payment date and event that may trigger conversion of the RTW Convertible Notes. The fair value is measured using a combination of observable (Level 2) and unobservable (Level 3) inputs, which include probabilities of various conversion scenarios, volatility, estimated market yields, and expected term. The determination of the fair value of the RTW Convertible Notes is complex and highly judgmental due to the significant estimation required.

Changes in the estimated fair value of the RTW Convertible Notes are recorded in Other income (expense) in the condensed consolidated statement of operations and are reflected in the period in which they are identified.

Determination of Fair Value of Legacy Allurion Preferred Stock, Common Stock and Warrants

The estimated fair value of our Legacy Allurion shares has been determined by the Legacy Allurion board of directors, with input from management, considering the most recently available third-party valuations then available and the Legacy Allurion board of directors' assessment of additional objective and subjective factors that it believed were relevant. These factors included, but were not limited to:

•the prices at which we sold shares of Legacy Allurion preferred stock and the superior rights and preferences of the Legacy Allurion preferred stock relative to the Legacy Allurion common stock at the time of each grant;

•our stage of development and business strategy;

•external market conditions and trends affecting our industry;

•our financial position, including cash on hand, and our historical and forecasted performance and operating results;

•the lack of an active public market for our Common Stock and our preferred stock;

•the likelihood of achieving a liquidity event, such as an initial public offering, deSPAC transaction, or sale of our company in light of prevailing market conditions; and

•the analysis of initial public offerings or other financing transactions and market performance of comparable companies in the industry.

The fair value of the underlying Legacy Allurion preferred stock, common stock, and warrants was determined by the Legacy Allurion board of directors until we were listed on the NYSE on August 2, 2023. The fair value of the Legacy Allurion shares is utilized in the determination of stock-based compensation expense, common stock warrant liability expense, preferred stock recorded at fair value and the convertible notes conversion price. The assumptions underlying these valuations represented management’s best estimates, which involved inherent uncertainties and the application of management’s judgment. As a result, if we had used significantly different assumptions or estimates, the fair value of the Legacy Allurion preferred stock issued in 2021 and Legacy Allurion Convertible Notes converted in 2021 could be materially different. Significantly different assumptions or estimates could also impact the fair value of the Legacy Allurion Stock Options and stock-based compensation and fair value of the Legacy Allurion warrants, but these have not been material to date.

Recent Accounting Pronouncements

See Note 3, Summary of Significant of Accounting Policies in the accompanying notes to the consolidated financial statements included in Part 1, Item 1 of this Quarterly Report on Form 10-Q/A for a description of recently issued accounting pronouncements that may potentially impact our financial position, results of operations or cash flows.

Emerging Growth Company and Smaller Reporting Company

We are an emerging growth company, as defined in the Jumpstart Our Business Startups Act (“JOBS Act”). Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that (i) we are no longer an emerging growth company or (ii) we affirmatively and irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, these financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public company effective dates. We may choose to early adopt any new or revised accounting standards whenever such early adoption is permitted for private companies.

Additionally, we are a “smaller reporting company” as defined in Item 10(f)(1) of Regulation S-K, which allows us to take advantage of certain exemptions from disclosure requirements including exemption from compliance with the auditor attestation requirements of Section 404. We will remain a smaller reporting company until the last day of the fiscal year in which (i) the market

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value of the shares of our Common Stock held by non-affiliates exceeds $250 million as of the prior June 30, and (ii) our annual revenue exceeded $100 million during such completed fiscal year or the market value of the shares of our Common Stock held by non-affiliates exceeds $700 million as of the prior June 30. To the extent we take advantage of such reduced disclosure obligations, it may also make comparison of our financial statements with other public companies difficult or impossible.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Interest Rate Risk

We had cash and cash equivalents totaling $19.3 million at June 30, 2024. Cash equivalents were invested primarily in money market funds. Our investment policy is focused on the preservation of capital and supporting our liquidity needs. Under our investment policy, we invest in highly rated securities, issued by the U.S. government or liquid money market funds. We do not invest in financial instruments for trading or speculative purposes, nor do we use leveraged financial instruments. We utilize external investment managers who adhere to the guidelines of our investment policy. A hypothetical 10% change in interest rates would not have a material impact on the value of our cash, cash equivalents, net loss or cash flows.

As of June 30, 2024, we had no variable rate debt outstanding.

Foreign Currency Exchange Risk

We are exposed to foreign currency risks that arise from normal business operations. These risks include transaction gains and losses associated with transactions denominated in currencies other than a location’s functional currency and the remeasurement of foreign currencies to our U.S. dollar reporting currency. As such, we have exposure to adverse changes in exchange rates associated with operating expenses of our foreign operations. Transaction gains or losses are included in other income (expense), net in the consolidated statements of operations, as incurred.

We believe that a 10% increase or decrease in current exchange rates between the U.S. dollar and our foreign currencies could have a material impact on our business, financial condition or results of operations. Our primary exposures related to foreign currency denominated sales and expenses are in Europe and we also have exposure in the Middle East and the Asia-Pacific region, and are monitoring potential developing exposure in the Latin American, Canadian and African markets.

To date, we have not engaged in any foreign currency hedging activities. As our international operations grow, we will continue to reassess our approach to managing the risks relating to fluctuations in foreign currency exchange rates. During the six months ended June 30, 2024, the effect of an immediate 10% adverse change in foreign exchange rates on foreign-denominated accounts would have had an impact of approximately 7% on revenues and 3% on expenses and would have impacted our net income by approximately 6%. During the six months ended June 30, 2023, the effect of an immediate 10% adverse change in foreign exchange rates on foreign-denominated accounts would have had an impact of approximately 5% on revenues and 2% on expenses and would have impacted our net loss by approximately 1%.

Item 4. Controls and Procedures.

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Securities Exchange Act of 1934, as amended (the "Exchange Act") is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosure.

Evaluation of Disclosure Controls and Procedures

In connection with the filing of our Original Form 10-Q on August 14, 2024, our Chief Executive Officer and Chief Financial Officer have reviewed and evaluated the effectiveness of the Company's disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) promulgated under the Exchange Act) as of the end of the period covered by this Quarterly Report on Form 10-Q/A. Based on that review and evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that the Company's disclosure controls and procedures were not effective as of June 30, 2024 as a result of the material weaknesses in our internal control over financial reporting discussed below. Subsequent to the original evaluation, and as described in the Explanatory Note to the Form 10-Q/A, the Company identified an Error which led to the restatement of certain of the Company’s historical consolidated financial statements. The Company's management determined that the Error and the related restatements were the result of the existing material weaknesses in the Company’s internal control over financial reporting. The Company determined that the Error originated from the lack of sufficient levels of staff with public company and technical accounting experience to maintain proper control activities and perform risk assessment and monitoring activities.

In connection with the audits of our consolidated financial statements as of and for the years ended December 31, 2023 and 2022, we identified material weaknesses in our internal control over financial reporting that we are currently working to remediate, which relate to: (a) insufficient segregation of duties in the financial statement close process; (b) a lack of sufficient levels of staff with public company and technical accounting experience to maintain proper control activities and perform risk assessment and monitoring activities; and (c) insufficient information systems controls, including access and change management controls. We have concluded that these material weaknesses in our internal control over financial reporting occurred because we did not have the necessary business

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processes, personnel and related internal controls to operate in a manner to satisfy the accounting and financial reporting timeline requirements of a public company.

We are focused on designing and implementing effective internal controls measures to improve our evaluation of disclosure controls and procedures, including internal control over financial reporting, and remediating the material weaknesses. In order to remediate these material weaknesses, we have taken and plan to take the following actions:

•the hiring and planned continued hiring of additional accounting staff with public company experience,

•implemented a new enterprise resource planning system to replace the prior enterprise resource planning system,

•implementation of additional review controls and processes requiring timely account reconciliation and analyses of certain transactions and accounts, and

•hired a national accounting firm to assist in the design and implementation of controls and remediation of controls gaps.

While progress has been made to enhance our internal control over financial reporting, we are still in the process of building and enhancing our processes, procedures, and controls. Additional time is required to complete the remediation of these material weaknesses and the assessment to ensure the sustainability of these remediation actions. We believe the above actions, when complete, will be effective in the remediation of the material weaknesses described above.

Changes in Internal Control Over Financial Reporting

During the most recently completed fiscal quarter, there has been no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is required to apply judgment in evaluating the benefits of possible controls and procedures relative to their costs.

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PART II—OTHER INFORMATION

Item 1. Legal Proceedings.

From time to time, we may become involved in legal proceedings or be subject to claims arising in the ordinary course of our business. We are not currently a party to any material legal proceedings. Regardless of outcome, such proceedings or claims can have an adverse impact on the Company because of defense and settlement costs, diversion of resources and other factors, and there can be no assurances that favorable outcomes will be obtained.

Item 1A. Risk Factors.

Information regarding risk factors appears in Part I, Item 1A. "Risk Factors" of our Annual Report on Form 10-K for the year ended December 31, 2023, which was filed with the SEC on March 26, 2024 and subsequently amended on April 29, 2024 and August 28, 2025 (the “Annual Report on Form 10-K”). You should carefully consider the risks described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, under the heading “Part I — Item 1A. Risk Factors,” together with the additional risk factors included below and all of the other information in this Quarterly Report on Form 10-Q/A. Except as set forth below, there have been no material changes from the risk factors previously disclosed in such Annual Report on Form 10-K. In addition to the matters set forth herein, investors should review the risks factors and other information provided in the Annual Report on Form 10-K prior to making an investment in the Company. The business, financial condition and operating results of the Company can be affected by a number of factors, whether currently known or unknown, including but not limited to those described below and in the Annual Report on Form 10-K, any one or more of which could, directly or indirectly, cause the Company’s actual financial condition and operating results to vary materially from past, or from anticipated future, financial conditions and operating results. Any of these factors, in whole or in part, could materially and adversely affect the Company’s business, financial condition, operating results and stock price.

We expect to incur losses for the foreseeable future, our ability to achieve and maintain profitability depends on the commercial success of the Allurion Balloon, and we expect our revenues to continue to be driven primarily by sales of the Allurion Balloon.

We have incurred losses to date and expect to continue to incur losses for the foreseeable future. Sales of the Allurion Balloon and related accessories, which have occurred outside of the U.S. because we have not yet obtained the regulatory approval required to sell our products within the U.S., accounted for substantially all of our revenues for the years ended December 31, 2023 and 2022, and we expect our revenues to continue to be driven primarily by sales of the Allurion Balloon. In order to achieve and sustain profitability, our revenues from sales of the Allurion Balloon will need to grow beyond the levels we have achieved in the past. If health care providers and/or patients do not perceive our products to be competitive in features, efficacy and safety when compared to other products in the market, or if demand for the Allurion Balloon or for weight loss procedures and programs in general decreases, we may fail to achieve sales levels that provide for future profitability.

Our ability to successfully market and sell the Allurion Balloon and our other current and future product and service offerings depends on numerous factors, including but not limited to:

•outcomes of current and future clinical trials of, and trials involving, the Allurion Balloon;

•acceptance of the Allurion Balloon as safe and effective by patients, caregivers and the medical community;

•an acceptable safety profile of the Allurion Balloon in markets where we have obtained regulatory approvals;

•our ability to successfully complete remediation programs to resume sales of the Allurion Balloon in France and any other country that suspends sales of our products;

•whether key thought leaders in the medical community accept that such clinical trials are sufficiently meaningful to influence their or their patients’ choices of product;

•maintenance of our existing regulatory approvals and expansion of the geographies in which we have regulatory approvals;

•commercially viable processes at a scale sufficient to meet anticipated demand at an adequate cost of manufacturing, and that are compliant with ISO 13485 Quality Management System requirements and/or good manufacturing practice requirements, as set forth in the FDA’s QSR and other international regulations;

•our success in educating health care providers and patients about the benefits, administration and use of the Allurion Balloon;

•the availability, perceived advantages, relative cost, relative safety and relative efficacy of alternative and competing treatments;

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•the willingness of patients to pay out-of-pocket for the Allurion Balloon and/or VCS in the absence of coverage and reimbursement for such treatment;

•the success of our internal sales and marketing organization and the sales forces of our distributors; and

•continued demand for weight loss using balloon products, which may be adversely affected by events involving our products or those of our competitors, among other things.

Some of these factors are beyond our control. For example, on August 6, 2024, we announced that the ANSM suspended sales of the Allurion Balloon in France, and that we are withdrawing the Allurion Balloon from the French market, pending implementation of a remediation plan to reduce certain risks associated with the advertising, follow-up program, and adverse events for the Allurion Balloon. There is no guarantee that we will be able to successfully implement a remediation plan to the satisfaction of ANSM and we could be delayed or prevented from resuming sales of the Allurion Balloon in France. In addition, a withdrawal from the market in one country may have a negative effect on the regulatory approval process and ability to sell and commercialize the Allurion Balloon in other countries, and on the market acceptance of the Allurion Balloon. Any of these events may have an adverse effect on our business, financial condition, results of operations and growth prospects.

If we are unable to continue to commercialize the Allurion Balloon and our other current and future products and services, or are unable to obtain a distributor or partner to commercialize them, we may not be able to produce any incremental revenues related to the Allurion Balloon and our other current and future products and services. This would result in an adverse effect on our business, financial condition, results of operations and growth prospects.

The failure of the Allurion Balloon to achieve and maintain market acceptance could result in us achieving sales below our expectations, which would cause our business, financial condition and operating results to be materially and adversely affected.

Our current business and growth strategy is highly dependent on the Allurion Balloon achieving and maintaining market acceptance. In order for us to sell our products to healthcare providers and, ultimately, weight loss patients, we must convince them that our products are an attractive alternative to competitive treatments for patients who are obese and overweight, including traditional pharmaceutical therapies and more aggressive bariatric surgical treatments, such as gastric bypass and sleeve gastrectomy. Market acceptance and adoption of the Allurion Balloon depends on educating health care providers on its safe and appropriate use, as well as the cost, safety, comfort, tolerability, ease of use, and effectiveness of the Allurion Program compared to other treatments. If we are not successful in convincing existing and potential customers of the benefits of our product, or if we are not able to achieve the support of health care providers for our product, our sales may decline or we may achieve sales below our expectations.

Market acceptance of our products could be negatively impacted by many factors, including:

•the willingness of patients to pay out-of-pocket for the Allurion Program in the absence of coverage and reimbursement for such program;

•the failure of our products to achieve and maintain wide acceptance among patients who are obese and overweight, their health care providers, third-party payors and key opinion leaders in the weight loss treatment community;

•lack of evidence supporting the safety, ease-of-use or other perceived benefits of the Allurion Balloon over competitive products or other currently available weight loss treatment alternatives;

•perceived risks or uncertainties, or actual adverse events or other undesirable side effects, associated with the use of our gastric balloons, or components thereof, or of similar products or technologies of our competitors;

•any adverse legal action, including products liability litigation, against us or our competitors relating to the Allurion Balloon or similar products or technologies;

•the withdrawal or modification of any regulatory approvals for our products (including the withdrawal of the Allurion Balloon from the French market in August 2024); and

•results of clinical studies relating to the Allurion Balloon or similar competitive products.

In addition, the rapid evolution of technology and treatment options within our industry may cause consumers to delay the purchase of our products in anticipation of advancements or breakthroughs, or the perception that advancements or breakthroughs could occur, in our products or the products offered by our competitors. It is also possible that consumers interested in purchasing any of our future products currently under development may delay the purchase of one of our current products. In addition, customers may delay their purchasing decisions, or health care providers may refrain from providing our products, as a result of a global pandemic or unfavorable changes in general economic conditions.

If the Allurion Balloon, or any other therapy or product that we may develop, does not achieve and maintain widespread market acceptance, we may fail to achieve sales consistent with our projections, in which case our business, financial condition and operating results could be materially and adversely affected.

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There is no guarantee that the FDA or non-U.S. regulatory agencies will grant approval or clearance for our current or future products, including the Allurion Balloon. Failure to obtain regulatory approvals or clearances in the United States and other international jurisdictions, or revocation of approvals or clearances in those jurisdictions, will prevent us from marketing our products in such jurisdictions.

We intend to seek regulatory approval or clearance of our current and future products in the United States and certain non-U.S. jurisdictions. We have obtained a CE Mark for the Allurion Balloon and are therefore authorized to sell in the EU; however, in order to market in regions such as the United States, the Asia Pacific region and many other jurisdictions, we must obtain separate regulatory approvals or clearances.

The procedures for approval vary among countries and can involve additional clinical testing, and the time required to obtain approval or clearance may differ from that required to obtain the CE Mark or FDA approval. As a result of the United Kingdom leaving the EU, since January 1, 2021, the regulatory framework and regimes for medical devices in the United Kingdom and the EU have diverged. In particular, a new UKCA Mark was introduced for medical devices placed on the Great Britain market (which includes England, Scotland and Wales), and Northern Ireland adopted a hybrid approach as a result of the divergence in accordance with the Northern Ireland Protocol. Of note, on June 30, 2023, the UK Government introduced legislation, confirming that, subject to certain conditions, general medical devices compliant with the MDD with a valid declaration and CE mark can be placed on the Great Britain market up until the sooner of the expiry of the CE certificate or June 30, 2028, and general medical devices compliant with the MDR with a valid declaration and CE mark can be placed on the Great Britain market up until June 30, 2030.

Moreover, clinical studies or manufacturing processes conducted in one country may not be accepted by regulatory authorities in other countries. Approval by the FDA does not ensure approval by regulatory authorities in other countries, and approval by one or more international regulatory authorities does not ensure approval by regulatory authorities in other countries or by the FDA. However, a failure or delay in obtaining regulatory approval in one country may have a negative effect on the regulatory process in others. An international regulatory approval process may include all of the risks associated with obtaining FDA approval. We may not obtain regulatory approvals on a timely basis, if at all. We may not be able to submit for regulatory approvals or clearances and even if we submit we may not receive necessary approvals or clearances to commercialize our products in any market.

Before obtaining regulatory approval or clearance for the sale of a product, we may be required to conduct extensive preclinical studies and clinical trials to demonstrate the safety and efficacy of our planned products in human patients. Preclinical studies and clinical trials can be expensive, difficult to design and implement, can take many years to complete, and are uncertain as to outcome. A failure of one or more of our trials could occur at any stage of testing. In connection with the initiation of a clinical trial in the U.S., we filed an investigational device exemption application, which was approved by the FDA in 2016. After we conducted that trial and submitted a premarket approval application to the FDA, in 2020, the FDA requested additional data. Therefore, we withdrew the PMA and in 2021 submitted an IDE application for our AUDACITY trial, which the FDA approved in 2021. We are currently conducting that clinical trial.

Numerous unforeseen events during, or as a result of, preclinical and clinical trials could occur, which would delay or prevent our ability to receive regulatory approval or commercialize the Allurion Balloon or any of our future products, including the following:

•preclinical studies and clinical trials may produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additional studies or abandon product development programs;

•the number of patients required for clinical trials may be larger than we anticipate, enrollment in these clinical trials may be insufficient or slower than we anticipate, or patients may drop out of these clinical studies at a higher rate than we anticipate;

•the cost of preclinical studies and clinical trials may be greater than we anticipate;

•third-party contractors may fail to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at all;

•we might suspend or terminate clinical trials of our products for various reasons, including a finding that our products have unanticipated serious side effects or other unexpected characteristics, or that the trial subjects are being exposed to unacceptable health risks;

•regulators may not approve our proposed clinical development plans;

•regulators or independent institutional review boards ("IRBs") may not authorize us or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site;

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•regulators or IRBs may require that we, or our investigators, suspend or terminate clinical studies for various reasons, including non-compliance with regulatory requirements;

•regulators in countries where our products are currently marketed may require that we suspend commercial distribution if there is non-compliance with regulatory requirements or safety concerns;

•the supply or quality of our products or other materials necessary to conduct clinical studies of our products may be insufficient or inadequate; and

•the enactment of new regulatory requirements in the EU under the Medical Device Regulation ("MDR") effective since May 26, 2021 may make approval times longer and standards more difficult to pass. In particular, manufacturers are required to: (i) assign a unique device identification (“UDI”) to a medical device before it is placed on the EU market in order to improve traceability of the medical device; and (ii) register themselves, the medical device and the UDI, among other things, with a new European medical device database.

If we or any future collaboration or distribution partner are required to conduct additional clinical trials or other testing of the Allurion Balloon or any future products, those clinical studies or other testing may not be successfully completed. If the results of these studies or tests are not positive, or are only modestly positive or if they raise safety concerns, we may:

•be delayed in obtaining marketing approvals for the Allurion Balloon or our future products;

•not obtain marketing approval at all;

•obtain approval for indications that are not as broad as desired;

•have a product removed from the market after obtaining marketing approval; or

•be subject to restrictions on how the product is distributed or used.

Even if we obtain regulatory approvals or clearances in a jurisdiction, our products may be removed from the market due to a variety of factors, including adverse events, recalls, suspension of regulatory clearance to sell, or other factors. For example, on August 6, 2024, we announced that ANSM has suspended sales of the Allurion Balloon in France, and we are withdrawing the Allurion Balloon from the French market, pending implementation of a remediation plan to reduce certain risks associated with the advertising, follow-up program, and adverse events for the Allurion Balloon. There is no guarantee that we will be able to successfully implement a remediation plan to the satisfaction of ANSM and we could be delayed or prevented from resuming sales of the Allurion Balloon in France. A withdrawal from the market in one country may have a negative effect on the regulatory approval process and ability to sell and commercialize the Allurion Balloon in other countries, and on the market acceptance of the Allurion Balloon in other countries.

Although we launched the Allurion Balloon commercially in January 2016 and have placed over 150,000 units to date in various countries outside the U.S., we do not have as much post-market surveillance data as our competitors and may not have clearly identified all possible or actual risks of our products. Furthermore, if our clinical trials do not produce patient data that compares favorably with products that are already on the market, health care providers and patients may opt not to use our products, and our business would suffer.

Our product development costs will also increase if we experience delays to our clinical trials or approvals.

Significant clinical trial delays also could allow our competitors to bring products to market before we do, which would impair our ability to commercialize our products and harm our business and results of operations.

Negative publicity, product defects and any resulting litigation concerning our products or our competitors’ products could harm our reputation and reduce demand for the Allurion Balloon, either of which could negatively impact our financial results.

The responses of potential patients, health care providers, the media, legislative and regulatory bodies and others to information about complications or alleged complications of our products, or products liability litigation against us or our competitors, could result in negative publicity and could materially reduce market acceptance of our products. These responses or any investigations and potential resulting negative publicity may have a material adverse effect on our business and reputation and negatively impact our financial condition, results of operations or the market price of our Common Stock. In addition, significant negative publicity could result in an increased number of product liability claims against us. On August 6, 2024, the ANSM has suspended sales of the Allurion Balloon in France due to adverse events, and we withdrew the Allurion Balloon from the French market, pending implementation of a remediation plan. There is no guarantee that we will be able to successfully implement a remediation plan to the satisfaction of ANSM

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and we could be delayed or prevented from resuming sales of the Allurion Balloon in France. A withdrawal from the market in in France and the risks identified by ANSM could negatively affect the market acceptance of the Allurion Balloon.

If patients using our products experience adverse events or other undesirable side effects, regulatory authorities could withdraw or modify our regulatory approvals, which would adversely affect our reputation and commercial prospects and/or result in other significant negative consequences.

Undesirable side effects caused by the Allurion Balloon could cause us, the FDA or other applicable regulatory authorities to interrupt, delay or halt clinical trials, and could result in more restrictive labeling than originally required, cause the FDA or other regulatory authorities to subsequently withdraw or modify our PMA, if we obtain approval, or other regulatory approvals, or result in the delay or denial of regulatory approval by regulatory authorities. For example, we suspended sales of the Allurion Balloon in France following a request by the ANSM, due to adverse events linked to gastrointestinal complications. In addition, in the 1980s and early 1990s, the FDA required post-market safety and efficacy data be collected on an earlier version of an intragastric balloon after patients suffered severe side effects and complications with the device, which ultimately resulted in the withdrawal of the PMA approval.

As of December 31, 2023, we had sold over 130,000 units of the Allurion Balloon in international markets. In our commercial experience, the serious adverse event rate has been less than 0.2% and has been similar to the SAE profile reported in the literature.

If we are unable to demonstrate that any adverse events are not related to our product, the FDA or other regulatory authorities could order us to cease further development of, require more restrictive indications for use and/or additional warnings, precautions and/or contraindications in the labeling than originally required, or delay or deny approval of any of our products. Even if we are able to do so, such event(s) could affect patient recruitment or the ability of enrolled patients to complete the trial. Moreover, if we elect, or are required, to not initiate, delay, suspend or terminate any future clinical trial of any of our products, the commercial prospects of such product may be harmed and our ability to generate product revenues from our product may be delayed or eliminated. Any of these occurrences may harm our ability to develop other products, and may harm our business, financial condition and prospects significantly.

In addition, we or others may later identify undesirable side effects caused by the product (or any other similar product), resulting in potentially significant consequences, including:

•regulatory authorities may withdraw or limit their approval of the product;

•regulatory authorities may require the addition of labeling statements, such as a contraindication;

•we may be required to change the way the product is distributed or administered, conduct additional clinical trials or change the labeling of the product;

•we may be required to correct or remove the product from the marketplace or decide to conduct a voluntary recall;

•we may decide to alert physicians through customer notifications;

•regulatory authorities may use publicity such as a press release to alert our customers and the public of the issue;

•health care providers and patients may be dissatisfied, seek refunds and refuse to use our products;

•we could be sued and held liable for injury caused to individuals using our product; and

•our reputation may suffer.

Any of these events could prevent us from achieving or maintaining market acceptance of the Allurion Balloon and could substantially increase the costs of commercializing our product and significantly impact our ability to successfully commercialize our product and generate product sales.

We are not in compliance with the NYSE’s minimum share price requirement and thus are at risk of the NYSE delisting shares of our Common Stock, which would have an adverse impact on the trading volume, liquidity and market price of shares of our Common Stock.

On August 12, 2024, we received a letter from NYSE notifying us that, as of August 8, 2024, for the last 30 consecutive business days, the average closing price of our common stock had closed below $1.00 per share, the minimum average closing bid price required by the continued listing requirements of Rule 802.01C of the NYSE Listed Company Manual. Pursuant to Rule 802.01C of the NYSE Listed Company Manual, a company will be considered to be below compliance standards if the average closing price of a security fell below $1.00 over a period of 30 consecutive trading days. A company can regain compliance with the minimum share

62

price requirement at any time during the six-month cure period if, on the last trading day of any calendar month during the cure period, the company has (i) a closing share price of at least $1.00 and (ii) an average closing share price of at least $1.00 over the 30 trading-day period ending on the last trading day of that month. In the event that at the expiration of the six-month cure period, both a $1.00 closing share price on the last trading day of the cure period and a $1.00 average closing share price over the 30 trading-day period ending on the last trading day of the cure period are not attained, the NYSE will commence suspension and delisting procedures. We intend to monitor the closing bid price of our Common Stock and may, if appropriate, consider available options to regain compliance with the NYSE minimum share price requirement. However, we cannot assure you that we will be able to cure this deficiency or comply with other NYSE continued listing standards. A delisting of shares of our Common Stock from the NYSE could negatively impact us as it would likely reduce the liquidity and market price of shares of our Common Stock, reduce the number of investors willing to hold or acquire shares of our Common Stock, and negatively impact our ability to access equity markets and obtain financing.

An active trading market may not develop or be sustained.

The market for our securities may be highly volatile or may decline regardless of our operating performance. An active public market for our securities may not develop or be sustained. We cannot predict the extent to which investor interest in Allurion will lead to the development of an active trading market in our Common Stock or how liquid that market might become. If an active market does not develop or is not sustained, or if we fail to satisfy the continued listing standards of the NYSE for any reason and our securities are delisted, it may be difficult for you to sell your securities at the time you wish to sell them, at a price that is attractive to you, or at all. An inactive trading market may also impair our ability to both raise capital by selling shares of capital stock, attract and motivate employees through equity incentive awards and acquire other companies, products or technologies by using shares of capital stock as consideration.

On August 12, 2024, we received a letter from NYSE notifying us that, as of August 8, 2024, for the last 30 consecutive business days, the average closing price of our common stock had closed below $1.00 per share, the minimum average closing bid price required by the continued listing requirements of Rule 802.01C of the NYSE Listed Company Manual. We cannot assure you that we will be able to cure this deficiency or comply with other NYSE continued listing standards. A delisting of shares of our Common Stock from the NYSE could negatively impact us as it would likely reduce the liquidity and market price of shares of our Common Stock.

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Item 2. Unregistered Sales of Equity Securities, Use of Proceeds, and Issuer Purchases of Equity Securities

Unregistered Sales of Equity Securities, Use of Proceeds

On April 16, 2024 , pursuant to the Amended Note Purchase Agreement, we issued and sold $48.0 million aggregate principal amount of convertible senior secured notes to the Purchasers, which proceeds were used to repay all outstanding principal, accrued and unpaid interest and other obligations with respect to the Fortress Term Loan (as defined above). The Notes are convertible into shares of our Common Stock based on a conversion rate of 617.2840 shares of common stock per $1,000 principal amount of Notes (equivalent to a conversion price of approximately $1.62 per share, which represents at 35% premium to the lowest price per share in the Next Equity Financing. The maturity date for the Notes will be April 16, 2031. The Notes are guaranteed by Allurion Opco and certain other current and future subsidiaries of the Company, and are secured by substantially all the assets of Allurion and the guarantors. We used the proceeds from the issuance of the Notes to refinance its outstanding obligations under the Fortress Credit Agreement in full and to pay fees and expenses in connection therewith and in connection with the transactions contemplated by the Amended Note Purchase Agreement.

On June 28, 2024, the Company entered into the Subscription Agreement with RTW, pursuant to which the Company sold and issued to RTW 2,260,159 shares of Series A Preferred Stock, and 2,260,159 Private Placement Warrants to purchase Common Stock, for an aggregate purchase price of approximately $2.7 million at a purchase price per share of $1.20. The Private Placement closed on July 1, 2024.

None of the foregoing transactions involved any underwriters, underwriting discounts or commissions, or any public offering. The issuances of the shares described above were issued in reliance on the exemption from registration provided by Section 4(a)(2) of the Securities Act and/or Rule 506 of Regulation D promulgated under the Securities Act. The recipients of the securities in each of these transactions represented their intentions to acquire the securities for investment only and not with a view to or for sale in connection with any distribution thereof, and appropriate legends were placed on the share certificates issued in these transactions. All recipients had adequate access, through their relationships with us, to information about us. The sales of these securities were made without any general solicitation or advertising.

Issuer Purchases of Equity Securities

Not applicable.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

(c) None of our directors or “officers,” as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934, adopted or terminated a Rule 10b5-1 trading plan or arrangement or a non-Rule 10b5-1 trading plan or arrangement, as defined in Item 408(c) of Regulation S-K, during the fiscal quarter covered by this report.

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Item 6. Exhibits.

The following list of exhibits includes exhibits submitted with this Quarterly Report on Form 10-Q as filed with the SEC and those incorporated by reference to other filings.

Exhibit Number	Description	Incorporated by Reference herein from - Form or Schedule	File Number	Exhibit	Filed Date
1.1	Underwriting Agreement, dated as of June 28, 2024, among Allurion Technologies, Inc., Jefferies LLC and TD Securities (USA) LLC, as representatives of the underwriters named therein.	8-K	001-41767	1.1	July 1, 2024
3.1	Amended and Restated Certificate of Incorporation of Allurion Technologies, Inc. (f/k/a Allurion Technologies Holdings, Inc.)	8-K	001-41767	3.1	August 7, 2023
3.2	Bylaws of Allurion Technologies, Inc. (f/k/a Allurion Technologies Holdings, Inc.)	8-K	001-41767	3.2	August 7, 2023
3.3	Certificate of Designations of Preference Rights and Limitations of Series A Non-Voting Convertible Preferred Stock.	8-K	001-41767	3.1	July 1, 2024
4.1	Warrant Agreement, dated February 4, 2021, between Compute Health Acquisition Corp. and Continental Stock Transfer & Trust Company, as warrant agent.	8-K	001-40001	4.1	February 9, 2021
4.2	Amendment to Warrant Agreement, dated August 1, 2023, by and between Compute Health and Continental Stock Transfer & Trust Company.	8-K	001-41767	4.2	August 7, 2023
4.3	Warrant Assignment, Assumption and Amendment Agreement, dated August 1, 2023, by and among Compute Health Acquisition Corp., New Allurion Holdings, Inc., and Continental Stock Transfer & Trust Company.	8-K	001-41767	4.3	August 7, 2023
4.4	Form of Public Warrant.	8-K	001-41767	4.1	July 1, 2024
4.5	Form of Private Placement Warrant.	8-K	001-41767	4.2	July 1, 2024
10.1#+	Note Purchase Agreement dated as of April 14, 2024, by and among Allurion Technologies, Inc., RTW Investments, LP, as agent for the purchasers part thereto from time to time, and Acquiom Agency Services LLC, as collateral agent for the purchasers.	8-K	001-41767	10.1	April 17, 2024
10.2#	Omnibus Amendment, dated as of April 14, 2024, by and among Allurion Technologies, Inc., Allurion Technologies, LLC and certain entities that have engaged RTW Investments, LP as investment manager.	8-K	001-41767	10.2	April 17, 2024
10.3#	First Amendment to Amended and Restated Letter Agreement, dated as of April 14, 2024, by and among Allurion Technologies, Inc., Allurion Technologies, LLC, RTW Master Fund, Ltd., RTW Innovation Master Fund, Ltd. and RTW Biotech Opportunities Operating Ltd.	8-K	001-41767	10.3	April 17, 2024
10.4#	First Amendment to Note Purchase Agreement, dated as of April 16, 2024, by and among Allurion Technologies, Inc., RTW Investments, LP, as agent for the purchasers party thereto from time to time, and Acquiom Agency Services LLC, as collateral agent for the purchasers.	8-K	001-41767	10.4	April 17, 2024
10.5	Subscription Agreement, dated as of June 28, 2024, between Allurion Technologies, Inc. and the investors named therein.	8-K	001-41767	10.1	July 1, 2024

65

10.6	Eighth Amendment to 14 Huron Lease, dated as of April 3, 2024, by and between Allurion Technologies, Inc. and Fourteen Huron Drive, LLC.	10-Q	001-41767	10.6	August 14, 2024
10.7†++	Offer Letter dated May 17, 2024 with Ojas Buch.	10-Q	001-41767	10.7	August 14, 2024
31.1*	Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2**	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

* Filed herewith.

** Furnished herewith

# Certain of the exhibits and schedules to this exhibit have been omitted in accordance with Regulation S-K Item 601(a)(5). The Registrant agrees to furnish supplementally a copy of all omitted exhibits and schedules to the SEC upon its request.

+ Certain provisions or terms of this exhibit (including any exhibits or schedules thereto) have been omitted in accordance with Regulation S-K Item 601(b)(2). The Registrant agrees to furnish supplementally an unredacted copy of any such exhibit or schedule to the SEC upon its request.

++ Portions of this exhibit have been redacted in accordance with Regulation S-K Item 601(a)(6).

† Indicates a management contract or compensatory plan, contract or arrangement.

66

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Allurion Technologies, Inc.
Date: August 28, 2025	By:	/s/ Shantanu Gaur
		Shantanu Gaur
		Chief Executive Officer and President

67

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Shantanu Gaur, certify that:

1.I have reviewed this Amendment No. 1 to the Quarterly Report on Form 10-Q of Allurion Technologies, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 28, 2025	By:	/s/ Shantanu Gaur
		Shantanu Gaur
		Chief Executive Officer and President

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Shantanu Gaur, certify that:

1.I have reviewed this Amendment No. 1 to the Quarterly Report on Form 10-Q of Allurion Technologies, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles ;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 28, 2025	By:	/s/ Shantanu Gaur
		Shantanu Gaur
		Chief Executive Officer and President

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Amendment No. 1 to the Quarterly Report of Allurion Technologies, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: August 28, 2025	By:	/s/ Shantanu Gaur
		Shantanu Gaur
		Chief Executive Officer and President

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Amendment No. 1 to the Quarterly Report of Allurion Technologies, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: August 28, 2025	By:	/s/ Shantanu Gaur
		Shantanu Gaur
		Chief Executive Officer and President

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Aug. 09, 2024
Document Information [Line Items]
Document Type	10-Q/A
Amendment Flag	true
Document Period End Date	Jun. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Entity Registrant Name	Allurion Technologies, Inc.
Entity Central Index Key	0001964979
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Incorporation, State or Country Code	DE
Entity File Number	001-41767
Entity Tax Identification Number	92-2182207
Entity Address, Address Line One	11 Huron Drive
Entity Address, City or Town	Natick
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01760
City Area Code	508
Local Phone Number	647-4000
Entity Common Stock, Shares Outstanding		64,348,508
Document Quarterly Report	true
Document Transition Report	false
Amendment Description	EXPLANATORY NOTEThis Amendment No. 1 on Form 10-Q/A (“Form 10-Q/A”) amends and restates certain items in Allurion Technologies, Inc.'s (the “Company”) Quarterly Report on Form 10-Q as of and for the fiscal quarter ended June 30, 2024, initially filed with the Securities and Exchange Commission (the "SEC") on August 14, 2024 (the "Original Form 10-Q").In this Form 10-Q/A, the Company is restating its previously issued unaudited condensed consolidated financial statements for the fiscal quarter ended June 30, 2024, as further described below. In addition, the Company previously filed (i) Amendment No. 1 to its Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (together with the 2023 Form 10-K/A, the “Annual Reports”) with the SEC on August 19, 2025 to restate its previously issued audited consolidated financial statements as of and for the fiscal year ended December 31, 2024, (ii) Amendment No. 2 to its Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as amended, (the “2023 Form 10-K/A”), with the SEC on August 28, 2025 to restate its previously issued audited consolidated financial statements as of and for the fiscal year ended December 31, 2023, (iii) Amendment No. 1 to its Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2024 (the “Q1 2024 Form 10-Q/A”), with the SEC on August 28, 2025 to restate its previously issued unaudited condensed consolidated financial statements for the quarter ended March 31, 2024 and (iv) Amendment No. 1 to its Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2025 (the “Q1 2025 Form 10-Q/A”) with the SEC on August 19, 2025, to restate its previously issued unaudited condensed consolidated financial statements for the quarter ended March 31, 2025. Further the Company is filing an amendment to its Quarterly Report on Form 10-Q for the quarter ended September 30, 2024 (together with this Form 10-Q/A, the Q1 2024 Form 10-Q/A and the Q1 2025 Form 10-Q/A, the “Quarterly Reports”) to restate its previously issued unaudited consolidated financial statements for the fiscal quarter ended September 30, 2024.The Company does not intend to amend any other reports previously filed with the SEC. Accordingly, investors and other readers should rely only on the financial information and related disclosures regarding the periods described above (the “Affected Periods”) in this Form 10-Q/A, such amendments to the Annual and Quarterly Reports described in the preceding paragraph, and in any other future filings with the SEC (as applicable) and should not rely on the prior reports of its independent registered public accounting firm on the consolidated financial statements as of and for the years ended December 31, 2023 and 2024, as applicable, or any previously furnished or filed reports, press releases, investor presentations or similar communications relating to the Affected Periods.In addition to the restatement discussed above, the Company effected a 1-to-25 reverse stock split on January 3, 2025 (the “Reverse Stock Split”). As such, the Company has retrospectively adjusted Part I - Item 1, Financial Statements and Part I - Item 2, Management's Discussion and Analysis of Financial Condition and Results of Operations to reflect the effects of the Reverse Stock Split. No other items in this Form 10-Q/A were adjusted as a result of the Reverse Stock Split.
Common Stock, par value $0.0001 per share
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	ALUR
Security Exchange Name	NYSE
Warrants to purchase 1.420455 shares of Common Stock for $8.10 per share
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase0.056818 shares of Common Stock for $202.50 per share
Trading Symbol	ALUR WS
Security Exchange Name	NYSE

XML

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Aug. 01, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 19,258		$ 38,037
Accounts receivable, net of allowance of doubtful accounts of $11,363 and $12,671, respectively	13,357		18,194
Inventory, net	4,788		6,171
Prepaid expenses and other current assets	2,902		2,414
Total current assets	40,305		64,816
Property and equipment, net	3,254		3,381
Right-of-use asset	2,481		3,010
Other long-term assets	510		505
Total assets	46,550		71,712
Current liabilities:
Accounts payable	7,984		10,379
Current portion of term loan			38,643
Current portion of lease liabilities	850		908
Accrued expenses and other current liabilities	14,724		15,495
Total current liabilities	23,558		65,425
Public warrant liabilities	2,113		5,943
Revenue Interest Financing liability	39,000		36,200
Earn-out liabilities	4,110		23,990	$ 53,000
Convertible notes payable	40,950
Lease liabilities, net of current portion	1,788		2,306
Other liabilities	5,613		9,145
Total liabilities	117,132		143,009
Commitments and Contingencies (Note 17)
Stockholders' deficit:
Preferred stock, $0.0001 par value - 100,000,000 shares authorized as of June 30, 2024; and no shares issued and outstanding as of June 30, 2024 and December 31, 2023
Common stock, $0.0001 par value - 1,000,000,000 shares authorized as of June 30, 2024; and 1,918,927 and 1,907,529 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively	2		2
Additional paid-in capital	144,771		143,010	$ 15,200
Accumulated other comprehensive loss	5,980		700
Accumulated deficit	(221,335)		(215,009)
Total stockholders' deficit	(70,582)	$ (66,162)	(71,297)		$ (71,218)	$ (49,657)	$ (32,314)
Total liabilities and stockholders' deficit	$ 46,550		$ 71,712

XML

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Allowance of doubtful accounts	$ 11,363	$ 12,671
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	1,918,927	1,907,529
Common stock, shares outstanding	1,918,927	1,907,529

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Income Statement [Abstract]
Revenue	$ 12,960	$ 27,031
Cost of revenue	2,992	5,932
Gross profit	9,968	21,099
Operating expenses:
Sales and marketing	10,273	22,137
Research and development	6,581	14,433
General and administrative	6,408	11,714
Total operating expenses:	23,262	48,284
Loss from operations	(13,294)	(27,185)
Other income (expense):
Interest expense	(2,508)	(4,745)
Changes in fair value of warrants	(204)	(1,679)
Changes in fair value of debt	2,257	2,257
Loss on extinguishment of debt		(0)
Termination of convertible note side letters	(8,134)	(8,134)
Other income (expense), net	(91)	(255)
Total other income (expense):	(8,680)	(12,556)
Loss before income taxes	(21,974)	(39,741)
Provision for income taxes	(22)	(56)
Net loss	(21,996)	(39,797)
Cumulative undeclared preferred dividends	(725)	(1,442)
Net loss attributable to common shareholders	$ (22,721)	$ (41,239)
Net loss per share - Basic	$ (20.95)	$ (38.05)
Net loss per share - diluted	$ (20.95)	$ (38.05)
Weighted-average shares outstanding - Basic	1,084,300	1,083,897
Weighted-average shares outstanding - diluted	1,084,300	1,083,897

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Income (loss)	$ (8,322)	$ 1,996	$ (21,996)	$ (17,801)	$ (6,326)	$ (39,797)
Other comprehensive loss:
Change in fair value due to change in credit risk	8,100				9,100
Comprehensive Income (loss)	(5,242)		$ (21,996)		(1,046)	$ (39,797)
Revenue Interest Financing
Other comprehensive loss:
Change in fair value due to change in credit risk	3,000				5,200
RTW Convertible Notes
Other comprehensive loss:
Change in fair value due to change in credit risk	$ 80				$ 80

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning Balance at Dec. 31, 2022	$ (32,314)	$ 1	$ 99,877		$ (132,192)
Beginning Balance (in shares) at Dec. 31, 2022		1,083,196
Exercise of stock options	20		20
Exercise of stock options, (in shares)		616
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants	29		29
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants (in shares)		143
Stock-based compensation expense	409		409
Net Income (Loss)	(17,801)				(17,801)
Ending Balance at Mar. 31, 2023	(49,657)	$ 1	100,335		(149,993)
Ending Balance (in shares) at Mar. 31, 2023		1,083,955
Beginning Balance at Dec. 31, 2022	(32,314)	$ 1	99,877		(132,192)
Beginning Balance (in shares) at Dec. 31, 2022		1,083,196
Net Income (Loss)	(39,797)
Ending Balance at Jun. 30, 2023	(71,218)	$ 1	100,770		(171,989)
Ending Balance (in shares) at Jun. 30, 2023		1,085,081
Beginning Balance at Mar. 31, 2023	(49,657)	$ 1	100,335		(149,993)
Beginning Balance (in shares) at Mar. 31, 2023		1,083,955
Exercise of stock options	28		28
Exercise of stock options, (in shares)		1,106
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants	6		6
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants (in shares)		20
Stock-based compensation expense	401		401
Net Income (Loss)	(21,996)				(21,996)
Ending Balance at Jun. 30, 2023	(71,218)	$ 1	100,770		(171,989)
Ending Balance (in shares) at Jun. 30, 2023		1,085,081
Beginning Balance at Dec. 31, 2023	(71,297)	$ 2	143,010	$ 700	(215,009)
Beginning Balance (in shares) at Dec. 31, 2023		1,907,529
Exercise of stock options	9		9
Exercise of stock options, (in shares)		186
Issuance of common stock for the exercise of Public Warrants (in shares)		6
Issuance of common stock from equity line financing	378		378
Issuance of common stock from equity line financing (in shares)		5,730
Issuance of common stock in connection with vesting of RSU awards (in shares)		2,505
Stock-based compensation expense	552		552
Other comprehensive loss	2,200			2,200
Net Income (Loss)	1,996				1,996
Ending Balance at Mar. 31, 2024	(66,162)	$ 2	143,949	2,900	(213,013)
Ending Balance (in shares) at Mar. 31, 2024		1,915,956
Beginning Balance at Dec. 31, 2023	(71,297)	$ 2	143,010	700	(215,009)
Beginning Balance (in shares) at Dec. 31, 2023		1,907,529
Net Income (Loss)	(6,326)
Ending Balance at Jun. 30, 2024	(70,582)	$ 2	144,771	5,980	(221,335)
Ending Balance (in shares) at Jun. 30, 2024		1,918,927
Beginning Balance at Mar. 31, 2024	(66,162)	$ 2	143,949	2,900	(213,013)
Beginning Balance (in shares) at Mar. 31, 2024		1,915,956
Exercise of stock options	16		16
Exercise of stock options, (in shares)		460
Issuance of common stock for the exercise of Public Warrants	1		1
Issuance of common stock for the exercise of Public Warrants (in shares)		6
Issuance of common stock in connection with vesting of RSU awards (in shares)		2,505
Stock-based compensation expense	805		805
Other comprehensive loss	3,080			3,080
Net Income (Loss)	(8,322)				(8,322)
Ending Balance at Jun. 30, 2024	$ (70,582)	$ 2	$ 144,771	$ 5,980	$ (221,335)
Ending Balance (in shares) at Jun. 30, 2024		1,918,927

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Operating Activities:
Net income (loss)	$ (39,797)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash lease expense	416
Depreciation and amortization	399
Stock-based compensation	810
Provision for uncollectible accounts	2,885
Unrealized exchange (gain) or loss	49
Provision for inventory	469
Change in fair value of warrant liabilities	1,679
Change in fair value of derivative liabilities	35
Change in fair value of debt	(2,257)
Non-cash interest expense	775
Non-cash termination of convertible note side letters	6,632
Loss on term loan extinguishment	0
Changes in operating assets and liabilities:
Accounts receivable	930
Inventory	(1,468)
Prepaid expenses, other current and long-term assets	634
Lease liabilities	(391)
Accounts payable	5,021
Accrued expenses and other current liabilities	3,162
Net cash used in operating activities	(20,017)
Investing Activities:
Purchases of property and equipment	(408)
Net cash used in investing activities	(408)
Financing Activities:
Proceeds from issuance of convertible notes	19,550
Proceeds from option and warrant exercises	61
Repayment of convertible notes	(500)
Payment of deferred financing costs	(1,604)
Net cash provided by (used in) financing activities	17,507
Net increase (decrease) in cash and cash equivalents and restricted cash	(2,918)
Cash and cash equivalents and restricted cash at beginning of period	8,023
Cash and cash equivalents and restricted cash at end of period	5,105
Supplemental disclosure of cash flow information
Cash paid for interest	3,967
Supplemental cash flow information on non-cash investing and financing activities
Purchase of property and equipment included in accounts payable	165
Deferred financing costs in accounts payable and accrued expenses	$ 6,918

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - Reconciliation of Cash and Cash Equivalents and Restricted Cash - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 19,258	$ 38,037
Restricted cash included in other long-term assets	$ 388	$ 384
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Cash and cash equivalents and restricted cash shown in the statement of cash flows	$ 19,646	$ 38,421

XML

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ (8,322)	$ 1,996	$ (21,996)	$ (17,801)	$ (6,326)	$ (39,797)

XML

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

XML

Organization and Basis of Presentation

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

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™ Balloon. The Allurion Balloon 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 Balloon 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 Balloon, referred to as the “Allurion Program”. The base tier of the VCS is free of charge to those purchasing the Allurion Balloon, 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, Hong Kong, 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”). Allurion shares 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. As a result of this retrospective application, certain prior period balances within the condensed consolidated financial statements have changed. Refer to Note 4, Business Combination for further discussion regarding the closing of the Business Combination with Compute Health.

Unless otherwise indicated, references in this Quarterly Report on Form 10-Q/A to the "Company", "our", and "Allurion" refer to the condensed 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 unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. 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"). They should be read in conjunction with our audited financial statements as of and for the year ended December 31, 2023 included in the Company's Annual Report on Form 10-K, as amended by Amendment No. 1 to the Annual Report on Form 10-K filed with the SEC on April 28, 2024 and Amendment No. 2 to the Annual Report on Form 10-K filed with the SEC on August 28, 2025 (collectively, the"Annual Report on Form 10-K"). The financial statements as of June 30, 2024 and for the three and six months ended June 30, 2024 and 2023 presented in this report are unaudited; however, in the opinion of management such financial statements reflect all adjustments, consisting solely of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods presented. The results of operations for the periods presented are not necessarily indicative of the results that might be expected for future interim periods or for the full year.

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. A loss from remeasurement of $0.4 million and gain from remeasurement of less than $0.1 million for the six months ended June 30, 2024 and 2023, respectively, and losses from remeasurement of $0.1 million each of the three months ended June 30, 2024 and 2023, are recorded in the statements of operations within Other income (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 three and six months ended June 30, 2024 and 2023.

Reverse Stock Split

The Company held its annual meeting of stockholders on December 16, 2024 (the “Annual Meeting”), and upon the recommendation of the Board of Directors (the “Board”) of the Company, the Company’s stockholders approved a certificate of amendment to the Company’s Amended and Restated Certificate of Incorporation (as amended and restated from time to time, the "Charter") to effect a reverse stock split of the Company’s Common Stock at a ratio between 1-for-10 and 1-for-25, with the final ratio to be determined by the Board in its sole discretion.

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 to its Charter 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 resulted, among other changes to the convertible note terms, 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 resulted, among other changes to the warrant terms, 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 25 shares of Common Stock that may be purchased pursuant to the exercise of public warrants will represent one 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 following the Reverse Stock Split is exercisable for 0.056818 shares of Common Stock at an exercise price of $202.50 per share, which is based on each public warrant being exercisable for 1.420455 shares of Common Stock before the Reverse 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 condensed consolidated financial statements have been adjusted to reflect the 1-for-25 Reverse Stock Split for all periods presented. As a result, net income per share was also retrospectively adjusted for periods ended prior to the Reverse Stock Split.

Going Concern

The Company has evaluated whether there are certain 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 interim condensed consolidated financial statements are issued.

The Company has incurred recurring losses since inception, anticipates net losses and negative operating cash flows for the near future, and may be unable to remain in compliance with certain financial covenants required under its credit facilities. Through June 30, 2024, the Company has funded its operations primarily with proceeds from the sale of its convertible preferred stock, issuance of convertible notes, issuance of term loans, and funds received upon consummation of the Business Combination. The Company has incurred recurring losses and cash outflows from operating activities since its inception, including losses from operations of $20.7 million and $27.2 million and cash outflows from operating activities of $17.6 million and $20.0 million for the six months ended June 30, 2024 and 2023, respectively. As of June 30, 2024, the Company had an accumulated deficit of $221.3 million (as restated). The Company expects to continue to generate significant operating losses for the foreseeable future.

Based on the Company's recurring losses from operations incurred since inception, its expectation of continuing operating losses for the foreseeable future, the potential need to raise additional capital to finance its future operations, and the potential of being unable to remain in compliance with certain financial covenants under its credit facilities, the Company has concluded that there is substantial doubt about its ability to continue as a going concern for a period of one year from the date that these condensed consolidated financial statements are issued. The accompanying unaudited condensed consolidated financial statements have been prepared assuming that the Company will continue as a going concern, which contemplates the realization of assets and the settlement of liabilities and commitments in the normal course of business.

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Restatement of Previously Issued Condensed Consolidated Financial Statements

6 Months Ended

Jun. 30, 2024

Accounting Changes and Error Corrections [Abstract]

Restatement of Previously Issued Condensed Consolidated Financial Statements

2. Restatement of Previously Issued Condensed Consolidated Financial Statements

While preparing its unaudited condensed consolidated financial statements for the quarter ended June 30, 2025, the Company identified an error (the "Error") in the Company’s historical consolidated financial statements as of and for the years ended December 31, 2023 and 2024, and the quarter and year-to-date periods ended March 31, 2024, June 30, 2024, September 30, 2024 and March 31, 2025, that caused both overstatements and understatements of Other comprehensive income (loss) as reflected in the consolidated statements of comprehensive income (loss), Other income (expense) as reflected in the consolidated statements of operations, Net income (loss) as reflected in the consolidated statements of comprehensive loss and consolidated statements of operations, and Accumulated other comprehensive income (loss) and Accumulated deficit as reflected in the consolidated balance sheets and consolidated statements of stockholders' deficit. The Company determined that the Error originated from the existing material weakness related to the lack of sufficient levels of staff with public company and technical accounting experience to maintain proper control activities and perform risk assessment and monitoring activities. These adjustments were inadvertently booked in the wrong direction consistently since the fourth quarter of 2023. The Error had no impact to revenue, gross profit, operating expenses, operating loss, or cash and cash equivalents.

Additionally, the Company corrected an item that was previously identified and concluded as an immaterial error to its condensed consolidated financial statements for the six months ended June 30, 2024. This item primarily relates to Other liabilities and Other income (expense) misclassifications.

As a result, the Company is restating the unaudited condensed consolidated financial statements as of and for the fiscal quarter ended June 30, 2024.

The effects of the restatements on the condensed consolidated financial statements as of and for the three and six months ended June 30, 2024 are as follows:

Restated Condensed Consolidated Balance Sheet

(dollars in thousands)

	As of June 30, 2024
	As Reported			Adjustment			As Restated
Assets
Current assets:
Cash and cash equivalents	$	19,258		$	—		$	19,258
Accounts receivable, net of allowance of doubtful accounts		13,357			—			13,357
Inventory, net		4,788			—			4,788
Prepaid expenses and other current assets		2,902			—			2,902
Total current assets		40,305			—			40,305
Property and equipment, net		3,254			—			3,254
Right-of-use asset		2,481			—			2,481
Other long-term assets		510			—			510
Total assets	$	46,550		$	—		$	46,550
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	7,984		$	—		$	7,984
Current portion of lease liabilities		850			—			850
Accrued expenses and other current liabilities		14,724			—			14,724
Total current liabilities		23,558			—			23,558
Public warrant liabilities		2,113			—			2,113
Revenue Interest Financing liability		39,000			—			39,000
Earn-out liabilities		4,110			—			4,110
Convertible notes payable		40,950			—			40,950
Lease liabilities, net of current portion		1,788			—			1,788
Other liabilities		5,613			—			5,613
Total liabilities		117,132			—			117,132
Commitments and Contingencies
Stockholders’ deficit:
Preferred stock, $0.0001 par value — 100,000,000 shares authorized as of June 30, 2024; and no shares issued and outstanding as of June 30, 2024		—			—			—
Common stock, $0.0001 par value — 1,000,000,000 shares authorized as of June 30, 2024; and 1,918,927 shares issued and outstanding as of June 30, 2024		2			—			2
Additional paid-in capital		144,771			—			144,771
Accumulated other comprehensive income (loss)		(5,980	)		11,960			5,980
Accumulated deficit		(209,375	)		(11,960	)		(221,335	)
Total stockholders’ deficit		(70,582	)		—			(70,582	)
Total liabilities and stockholders’ deficit	$	46,550		$	—		$	46,550

Restated Condensed Consolidated Statement of Operations

(dollars in thousands)

	Three months ended June 30, 2024									Six months ended June 30, 2024
	As Reported			Adjustment			As Restated			As Reported			Adjustment			As Restated
Revenue	$	11,766		$	—		$	11,766		$	21,152		$	—		$	21,152
Cost of revenue		2,773			—			2,773			5,293			—			5,293
Gross profit		8,993			—			8,993			15,859			—			15,859
Operating expenses:
Sales and marketing		6,718			—			6,718			12,863			—			12,863
Research and development		4,310			—			4,310			10,035			—			10,035
General and administrative		7,311			—			7,311			13,697			—			13,697
Total operating expenses:		18,339			—			18,339			36,595			—			36,595
Loss from operations		(9,346	)		—			(9,346	)		(20,736	)		—			(20,736	)
Other income (expense):
Interest expense		(339	)		—			(339	)		(2,270	)		—			(2,270	)
Changes in fair value of warrants		1,376			—			1,376			4,507			—			4,507
Changes in fair value of debt		8,230			(160	)		8,070			8,230			(160	)		8,070
Changes in fair value of Revenue Interest Financing and PIPE Conversion Option		6			(6,000	)		(5,994	)		1,496			(9,590	)		(8,094	)
Changes in fair value of earn-out liabilities		5,690			—			5,690			19,880			—			19,880
Loss on extinguishment of debt		(8,713	)		—			(8,713	)		(8,713	)		—			(8,713	)
Other income (expense), net		999			—			999			1,171			—			1,171
Total other income (expense):		7,249			(6,160	)		1,089			24,301			(9,750	)		14,551
Income (loss) before income taxes		(2,097	)		(6,160	)		(8,257	)		3,565			(9,750	)		(6,185	)
Provision for income taxes		(65	)		—			(65	)		(141	)		—			(141	)
Net income (loss)	$	(2,162	)	$	(6,160	)	$	(8,322	)	$	3,424		$	(9,750	)	$	(6,326	)
Net income (loss) per share
Basic	$	(1.13	)	$	(3.21	)	$	(4.34	)	$	1.79		$	(5.09	)	$	(3.30	)
Diluted	$	(1.13	)	$	(3.21	)	$	(4.34	)	$	1.67		$	(4.97	)	$	(3.30	)
Weighted-average shares outstanding
Basic		1,917,872			—			1,917,872			1,914,527			—			1,914,527
Diluted		1,917,872			—			1,917,872			1,959,881			(45,354	)		1,914,527

Restated Condensed Consolidated Statement of Comprehensive Income

(dollars in thousands)

	Three months ended June 30, 2024									Six months ended June 30, 2024
	As Reported			Adjustment			As Restated			As Reported			Adjustment			As Restated
Net income (loss)	$	(2,162	)	$	(6,160	)	$	(8,322	)	$	3,424		$	(9,750	)	$	(6,326	)
Other comprehensive loss:
Change in fair value of Revenue Interest Financing due to change in credit risk		(3,000	)		6,000		$	3,000			(5,200	)		10,400			5,200
Change in fair value of RTW Convertible Notes due to change in credit risk		(80	)		160		$	80			(80	)		160			80
Comprehensive Income (loss)	$	(5,242	)	$	—		$	(5,242	)	$	(1,856	)	$	810		$	(1,046	)

Restated Condensed Consolidated Statement of Cash Flows

(dollars in thousands)

	Six Months Ended June 30, 2024
	Originally Reported			Adjustment			As Restated
Operating Activities:
Net income (loss)	$	3,424		$	(9,750	)	$	(6,326	)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash lease expense		362			—		362
Depreciation and amortization		564			—		564
Stock-based compensation		1,357			—			1,357
Unrealized exchange (gain) or loss		373			—			373
Provision for inventory		369			—			369
Change in fair value of warrant liabilities		(4,507	)		—			(4,507	)
Change in fair value of derivative liabilities		(1,895	)		—			(1,895	)
Change in fair value of Revenue Interest Financing and PIPE Conversion Option		(1,496	)		9,590			8,094
Change in fair value of earn-out liabilities		(19,880	)		—			(19,880	)
Interest paid on debt recorded at fair value		(1,054	)		—			(1,054	)
Change in fair value of debt		(8,230	)		160			(8,070	)
Debt issuance costs associated with debt recorded at fair value		1,357			—			1,357
Non-cash interest expense		1,464			—			1,464
Loss on term loan extinguishment		8,713			—			8,713
Changes in operating assets and liabilities:					—
Accounts receivable		4,412			—			4,412
Inventory		1,014			—			1,014
Prepaid expenses, other current and long-term assets		718			—			718
Lease liabilities		(411	)		—			(411	)
Accounts payable		(2,504	)		—			(2,504	)
Accrued expenses and other current liabilities		(1,713	)		—			(1,713	)
Net cash used in operating activities	$	(17,563	)	$	—		$	(17,563	)
Investing Activities:
Purchases of property and equipment		(539	)		—			(539	)
Net cash used in investing activities	$	(539	)	$	—		$	(539	)
Financing Activities:
Proceeds from issuance of convertible notes		48,000			—			48,000
Proceeds from option and warrant exercises		26			—			26
Proceeds from equity line financing		378			—			378
Repayment of convertible notes		—			—			—
Payment of deferred financing costs		—			—			—
Payment of debt issuance costs		(1,357	)		—			(1,357	)
Repayment of Fortress term loan		(47,720	)		—			(47,720	)
Net cash provided by (used in) financing activities	$	(673	)	$	—		$	(673	)
Net decrease in cash and cash equivalents and restricted cash		(18,775	)		—			(18,775	)
Cash and cash equivalents and restricted cash at beginning of period		38,421			—			38,421
Cash and cash equivalents and restricted cash at end of period	$	19,646		$	—		$	19,646
Supplemental disclosure of cash flow information
Cash paid for interest	$	2,672		$	—		$	2,672
Supplemental cash flow information on non-cash investing and financing activities							0
Purchase of property and equipment included in accounts payable	$	31		$	—		$	31
Deferred financing costs in accounts payable and accrued expenses		1,207			—			1,207
Change in fair value of RTW Convertible Notes through OCI		—			80			80
Change in fair value of Revenue Interest Financing through OCI		(5,280	)		10,480			5,200

The impacts of the restatements have been reflected throughout these condensed consolidated financial statements, including Notes 9, 10, 11, 12, 14, and 18.

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Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

3. Summary of Significant Accounting Policies

There have been no significant changes, except as described below, to the significant accounting policies disclosed in Note 3 of the “Notes to Consolidated Financial Statements” to the consolidated audited financial statements as of and for the year ended December 31, 2023 included in our Annual Report on Form 10-K.

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 condensed 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.

RTW Convertible Notes

The Company accounted for the RTW Convertible Notes (defined below) under the fair value options ("FVO") election of ASC Topic 825, Financial Instruments ("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 condensed 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.

Reclassification of Prior Year Presentation

Certain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no effect on the reported results of operations. Adjustment has been made to the condensed consolidated statement of operations for the three and six months ended June 30, 2023, to present the change in fair value of derivative liabilities as part of Other income (expense), net. This amount was a separate line item in prior years.

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 three and six months ended June 30, 2024 and 2023 or accounts receivable, net balance as of June 30, 2024 and December 31, 2023. The following table presents customers that represent 10% or more of the Company’s total revenue and accounts receivable, net:

	Revenue		Revenue		Accounts Receivable
	Three Months Ended June 30,		Six Months Ended June 30,		June 30,			December 31,
	2024	2023	2024	2023	2024			2023
Customer A	N/A	N/A	N/A	N/A		12	%		16	%

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.

Recently Adopted Accounting Pronouncements

In August 2020, the FASB issued ASU 2020-06, Debt with Conversion and Other Options and Derivatives and Hedging—Contracts in Entity’s Own Equity, which simplifies the accounting for convertible instruments. The guidance removes certain accounting models which separate the embedded conversion features from the host contract for convertible instruments. The Company adopted ASU 2020-06 effective January 1, 2024 under the modified retrospective method of transition approach. The adoption of ASU 2020-06 did not have an impact on the Company’s condensed consolidated financial statements.

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires disclosure of incremental segment information on an interim and annual basis. The Company adopted ASU 2023-07 effective January 1, 2024 under the retrospective method. We have disclosed significant segment expenses, other segment items, and our measure of segment profit or loss in Note 18, Segment Information.

Recently Issued Accounting Pronouncements Not Yet Adopted

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires 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. This ASU is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial statements and related disclosures.

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Business Combination

6 Months Ended

Jun. 30, 2024

Business Combinations [Abstract]

Business Combination

4. Business Combination

As discussed in Note 1, Organization and Basis of Presentation, on August 1, 2023 the Company consummated the Business Combination with Compute Health pursuant to the Business Combination Agreement. The Business Combination was accounted for as a reverse capitalization in accordance with U.S. GAAP. Under this method of accounting, Compute Health, which was the legal acquirer, was treated as the “acquired” company for financial reporting purposes. Accordingly, the Business Combination was treated as the equivalent of Allurion issuing stock for the net assets of Compute Health, accompanied by a recapitalization.

Upon the closing of the Business Combination, (a) holders of Legacy Allurion common stock received shares of Allurion Common Stock in an amount determined by application of the Exchange Ratio of approximately 0.9780, (the Exchange Ratio established in the Business Combination is prior to the Reverse Stock Split and did not change as a result of the Reverse Stock Split) (b) each then-outstanding share of Legacy Allurion preferred stock was converted into the right to receive shares of Allurion Common Stock equal to the number of shares of Legacy Allurion common stock that would be issued upon conversion of such outstanding share of Legacy Allurion preferred stock based on the applicable conversion ratio multiplied by the Exchange Ratio, (c) each then-outstanding and unexercised Legacy Allurion option was converted into a new Allurion option on the same terms and conditions as were applicable to such Legacy Allurion option based on the Exchange Ratio ("Rollover Option"), (d) each then-outstanding Legacy Allurion warrant was converted into a new Allurion warrant based on the Exchange Ratio ("Rollover Warrant"), (e) each then-outstanding Legacy Allurion restricted stock unit was converted into a rollover restricted stock unit based on the Exchange Ratio, and (f) certain amounts of loans made by Compute Health Sponsor LLC (the "Sponsor") to CPUH, which balance was $3.7 million at the time of the Business Combination (the "Sponsor Loan Excess"), were converted into 21,023 shares of Allurion Common Stock (as adjusted for the Reverse Stock Split) (the "Sponsor Loan Equity Issuance"). For periods prior to the Business Combination, the reported share and per share amounts have been retroactively converted by applying the Exchange Ratio. The consolidated assets, liabilities, and results of operations prior to the Business Combination are those of Legacy Allurion.

Further, upon the closing of the Business Combination and after giving effect to the Reverse Stock Split, each then-outstanding share of Compute Health Class A common stock was canceled and extinguished and was converted into the right to receive 0.056818 shares of Allurion Common Stock. Additionally, the Company assumed 13,206,922 outstanding public warrants to purchase an aggregate 750,394 shares of Allurion Common Stock at $202.50 per share.

In connection with the Business Combination, the Company incurred approximately $22.7 million of transaction costs, consisting of legal and other professional fees, of which $15.2 million was recorded to additional paid-in capital as a reduction of proceeds, $2.5 million was recorded as debt issuance costs in connection with the Fortress Term Loan (as defined below), and $5.0 million was recorded as an expense in general and administrative expenses on the condensed consolidated statement of operations and comprehensive loss. Of the $5.0 million recorded as general and administrative expenses, $3.6 million relates to a one-time insurance payment related to any potential matters that might arise from the period prior to the Business Combination, and as such is not

capitalized as an asset. An additional $1.2 million relates to direct costs and fees incurred as part of the Revenue Interest Financing with RTW.

The following table reconciles the elements of the Business Combination to the condensed consolidated statement of cash flows and the condensed consolidated statement of changes in equity:

	December 31, 2023
Cash – CPUH trust (net of redemptions)	$	38,395
Cash – PIPE Investors		37,922
Gross Proceeds		76,317
Less: transaction costs paid		(14,665	)
Net proceeds from the Business Combination		61,652
Less: warrant liabilities assumed		(13,762	)
Less: repayment of note assumed in the Business Combination		(2,500	)
Less: accrued transaction costs at December 31, 2023		(580	)
Business Combination, net of transaction costs	$	44,810

The number of shares of Allurion Common Stock outstanding immediately following the consummation of the Business Combination and after giving effect to the Reverse Stock Split was as follows:

	Common Stock
Legacy Allurion Equityholders (1)		1,115,896
CPUH Stockholders (2)		206,628
Shares Issued to PIPE Investors (2)		215,468
Shares issued to RTW and Fortress (3)		76,000
Shares issued to convertible note holders		132,049
CPUH Sponsor Shares (2)		130,509
Side Letter Termination Shares (3)		15,508
Total shares of Common Stock immediately after    Business Combination		1,892,058

(1) Consists of Legacy Allurion common stock and Legacy Allurion preferred stock, plus the issuance of common stock in connection with the vesting of RSUs at closing, less the Gaur Trust Contributed Shares (as defined below).

(2) The CPUH Stockholders shares, PIPE shares, and CPUH Sponsor shares are presented combined within the condensed consolidated statements of stockholders deficit on the "Reverse recapitalization, net of transaction costs" line, which is less the Gaur Trust Contributed Shares (as defined below).

(3) The shares issued to RTW and Fortress and the Side Letter Termination shares are presented combined within the condensed consolidated statements of stockholders deficit on the "Derecognition of liabilities associated with the Backstop Shares, Hunter shares, and additional RTW and Fortress shares and issuance of related shares" line.

PIPE Investment

In connection with the execution of the Business Combination Agreement, Allurion and Compute Health entered into subscription agreements, each dated February 9, 2023 (the “PIPE Subscription Agreements”), with certain accredited investors and qualified institutional buyers (the “PIPE Investors”), pursuant to which, upon the terms and subject to the conditions set forth therein, the PIPE Investors, among other things, purchased an aggregate of 215,468 shares of Allurion Common Stock at a purchase price of $176.00 per share (other than as set forth in the Amended and Restated RTW Side Letter, as defined below), for an aggregate purchase price of $37.9 million, following the CPUH Merger Effective Time (the "PIPE Investment").

Revenue Interest Financing Agreement, Side Letter and PIPE Conversion Option

On February 9, 2023, concurrently with the execution of the Business Combination Agreement, the Company entered into the Revenue Interest Financing Agreement (the "Revenue Interest Financing Agreement") with certain entities that engaged RTW Investment, LP (together with its affiliates, "RTW") as investment manager. Pursuant to the Revenue Interest Financing Agreement, 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. The Revenue Interest Financing Agreement was amended pursuant to the RIFA Amendment (as

defined below) 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. Refer to Note 10, Revenue Interest Financing, Side Letter, and PIPE Conversion Option below for further discussion on the Revenue Interest Financing.

Additionally, in connection with the Company entering in the Revenue Interest Financing, the Company, Compute Health, Legacy Allurion, Merger Sub II and RTW entered into a side letter (the "RTW Side Letter") on February 9, 2023 under which RTW may elect to convert up to $7.5 million of its initial PIPE Investment into an additional revenue interest financing by forfeiting a number of shares of Allurion Common Stock acquired by its PIPE Investment. Refer to Note 10, Revenue Interest Financing, Side Letter, and PIPE Conversion Option below for further discussion on the Revenue Interest Financing.

On May 2, 2023, the parties amended and restated the RTW Side Letter (as amended, the "Amended and Restated RTW Side Letter"), in connection with the Backstop Agreement (defined below), pursuant to which, among other things, Allurion issued 10,000 shares of Allurion Common Stock to RTW immediately prior to the Intermediate Merger Effective Time.

Fortress Credit Agreement

In connection with the closing of the Business Combination, the Company entered into a term loan facility (the “Fortress Term Loan”) pursuant to a Credit Agreement and Guaranty, dated as of August 1, 2023 (the “Fortress Credit Agreement”), with Fortress Credit Corp. (“Fortress”), as administrative agent for the lenders party thereto from time to time (the “Lenders”). Under the terms of the Fortress Term Loan, we borrowed $60.0 million which was used to repay the outstanding principal, accrued and unpaid interest, and other obligations with respect to the 2021 Term Loan (as defined below). Additionally, per the terms of the Fortress Term Loan and Backstop Agreement, Allurion issued an aggregate of 38,000 shares of Allurion Common Stock to an affiliate of Fortress pursuant to a subscription agreement between Allurion and such affiliate. Refer to Note 9, Debt for further discussion on the Fortress Term Loan.

Backstop Agreement

On May 2, 2023, CFIP2 ALLE LLC, an affiliate of Fortress Credit Corp., and RTW (collectively, the “Backstop Purchasers”), Legacy Allurion, Allurion and Hunter Ventures Limited (“HVL”) entered into the backstop agreement (the “Backstop Agreement”). Pursuant to the Backstop Agreement, immediately prior to the Intermediate Merger Closing, (a) each Backstop Purchaser purchased $2 million of the aggregate principal amount outstanding of HVL's Legacy Allurion Convertible Note issued in February 2023, (b) Allurion canceled the existing HVL Legacy Allurion Convertible Note and issued a new Allurion Convertible Note to HVL for the remaining balance together with all unpaid interest accrued since the date of issuance thereof, (c) Allurion issued new Allurion Convertible Notes to each Backstop Purchaser with an issuance date of August 1, 2023 and an original principal amount of $2 million each and (d) Allurion issued 28,000 shares of Allurion Common Stock to each Backstop Purchaser. Refer to Note 9, Debt for further discussion around the Backstop Agreement.

HVL Termination Agreement

On May 2, 2023, HVL and Legacy Allurion entered into a letter agreement (the “HVL Termination Agreement”), terminating the side letter agreement entered into between Legacy Allurion and HVL in connection with the issuance of HVL’s Legacy Allurion convertible note on February 15, 2023. Pursuant to the HVL Termination Agreement, among other things, at the closing of the Business Combination, upon the terms and subject to the conditions set forth therein, Allurion issued to HVL 15,508 shares of Allurion Common Stock. Refer to Note 9, Debt for further discussion regarding the HVL Termination Agreement.

Gaur Contribution Agreement

On May 2, 2023, Shantanu K. Gaur and Neha Gaur, trustees of The Shantanu K. Gaur Revocable Trust of 2021 (the “Gaur Trust”) and Allurion entered into a contribution agreement (the “Gaur Contribution Agreement”), pursuant to which, among other things, upon the terms and subject to the conditions set forth therein, the Gaur Trust contributed to Allurion, as a contribution of capital, 3,170 shares of Allurion Common Stock (the “Gaur Trust Contributed Shares”). The Gaur Trust’s contribution of the Gaur Trust Contributed Shares was effective immediately following the consummation of the Business Combination and the issuance of shares of Allurion Common Stock to the Gaur Trust pursuant to the terms of the Business Combination Agreement.

RSU Forfeiture Agreement

On May 2, 2023, Krishna Gupta, a member of our Board of Directors, entered into a letter agreement with Legacy Allurion (the “RSU Forfeiture Agreement”), pursuant to which, among other things, upon the terms and subject to the conditions set forth therein, Mr. Gupta agreed to forfeit 3,170 restricted stock units of Allurion (the “Forfeited RSUs”). The Forfeited RSUs were terminated and cancelled without consideration therefor immediately following the closing of the Business Combination Agreement.

Sponsor Contribution Agreement

On May 2, 2023, the Sponsor and Compute Health entered into a letter agreement (the "Sponsor Contribution Agreement") pursuant to which, among other things, upon the terms and subject to the conditions set forth therein, the Sponsor agreed to contribute to Compute Health, as a contribution of capital, 161,379 shares of Compute Health Class A Common Stock (“Sponsor Contributed Shares”), prior to giving effect to the Reverse Stock Split. The Sponsor’s contribution of the Sponsor Contributed Shares was made immediately following the CPUH Recapitalization (defined below) and immediately prior to the CPUH Merger Effective Time.

Sponsor Support Agreement

On February 9, 2023, Allurion entered into a support agreement (the "Sponsor Support Agreement"), pursuant to which immediately prior to the CPUH Merger Effective time, (a) the Sponsor recapitalized each of the Sponsor’s 21,442,500 shares of Compute Health Class B Common Stock, and all 12,833,333 of the Sponsor’s warrants to purchase shares of Class A Common Stock, into 2,088,327 shares of Compute Health Class A Common Stock and (b) the additional Class B Holders set forth on Schedule I of the Sponsor Support Agreement (the "Additional Class B Holders") recapitalized his or her 30,000 shares of Compute Health Class B Common Stock into 21,120 shares of Compute Health Class A Common Stock (the "CPUH Recapitalization"). Subsequently, at the CPUH Merger Effective Time, each such share of Compute Health Class A Common Stock was converted into shares of Allurion Common Stock at an exchange ratio of 1.420455 (the "CPUH Exchange Ratio").

Conversion of Convertible Notes

In connection with the closing of the Business Combination, outstanding Legacy Allurion Convertible Notes with an aggregate principal amount together with accrued but unpaid interest of approximately $21.8 million were converted into 132,049 shares of Allurion Common Stock with a corresponding recognition of additional paid-in capital ("APIC") of $25.6 million provided for under the terms of such Legacy Allurion Convertible Notes, and are no longer outstanding. Refer to Note 9, Debt for further information on the Company's convertible notes.

Public Warrants and Warrant Amendment

In connection with the closing of the Business Combination, 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 below). The total value of the liability associated with the Public Warrants was $13.8 million measured at fair value based on the public warrant quoted price. The Company concluded the 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. As such, they have been classified as a liability on the balance sheet. See Note 13, Capital Stock and Stockholders Deficit and Note 11, Fair Value Measurements for further information on the Public Warrants and Warrant Amendment.

Earn-Out Liabilities

In connection with 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 Company accounts for the potential issuance of the Earn-Out Shares as a contingent consideration arrangement, which was initially valued and recorded at $53.0 million. See Note 11, Fair Value Measurements for further information on the earn-out liabilities.

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Revenue

6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

Revenue

5. Revenue

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

	Three Months Ended June 30,
	2024		2023
France	$	1,866	$	1,258
Spain		1,450		896
All Other Countries		8,450		10,806
Total Revenues	$	11,766	$	12,960

For the three months ended June 30, 2024, $3.6 million of revenue was generated in five countries included within All Other Countries in the table above, representing approximately 31% of Total Revenues, with each country responsible for approximately 4% to 8% of the total. Remaining revenue was generated by sales in 40 other countries included within All Other Countries. For the three months ended June 30, 2023, $4.4 million of revenue was generated in five countries included within All Other Countries, representing approximately 35% of Total Revenues, with each country responsible for approximately 4% to 9% of the total. Remaining revenue was generated by sales in 40 other countries included within All Other Countries.

	Six Months Ended June 30,
	2024		2023
France	$	3,536	$	3,113
Spain		2,562		2,520
United Kingdom		2,173		2,257
All Other Countries		12,881		19,141
Total Revenues	$	21,152	$	27,031

For the six months ended June 30, 2024, $5.4 million of revenue was generated in five countries included within All Other Countries in the table above, representing approximately 26% of Total Revenues, with each country responsible for approximately 3% to 8% of the total. Remaining revenue was generated by sales in 45 other countries included within All Other Countries. For the six months ended June 30, 2023, $7.7 million of revenue was generated in five countries included within All Other Countries, representing approximately 29% of Total Revenues, with each country responsible for approximately 4% to 8% of the total. Remaining revenue was generated by sales in 48 other countries included within All Other Countries. No revenue was generated in the United States for the three and six months ended June 30, 2024.

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Inventory

6 Months Ended

Jun. 30, 2024

Disclosure Text Block [Abstract]

Inventory

6. Inventory

Inventory consists of the following (in thousands):

	June 30, 2024		December 31, 2023
Finished goods	$	2,760	$	3,427
Work in progress		767		967
Raw materials		1,261		1,777
Total Inventory	$	4,788	$	6,171

Inventory is stated net of $0.3 million and less than $0.1 million for the provision for excess and obsolete inventory as of June 30, 2024 and December 31, 2023, respectively.

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Property and Equipment, net

6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Property and Equipment, net

7. Property and Equipment, net

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

	Estimated Useful Life (in Years)	June 30, 2024			December 31, 2023
Computers and purchased software	3	$	618		$	618
Leasehold improvements	Shorter of useful life or lease term		1,943			1,943
Furniture and fixtures	5		291			291
Machinery and equipment	3-5		3,072			2,893
Property and equipment—at cost			5,924			5,745
Less accumulated depreciation and amortization			(3,984	)		(3,559	)
Construction in progress			1,314			1,195
Property and equipment—net		$	3,254		$	3,381

Depreciation expense was $0.2 million for each of the three months ended June 30, 2024 and 2023, and $0.6 million and $0.4 million for the six months ended June 30, 2024 and 2023, respectively, recorded as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Cost of revenue	$	112	$	59	$	314	$	218
Research and development		50		46	$	99		83
General and administrative		21		35	$	84		70
Sales and marketing		14		14	$	67		28
Total depreciation and amortization expense	$	197	$	154	$	564	$	399

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Accrued Expenses and Other Current Liabilities

6 Months Ended

Jun. 30, 2024

Accrued Liabilities and Other Liabilities [Abstract]

Accrued Expenses and Other Current Liabilities

8. Accrued Expenses and Other Current Liabilities

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

	June 30, 2024		December 31, 2023
Marketing reimbursement	$	1,620	$	2,834
Accrued compensation		2,921		1,687
Accrued clinical trials and R&D		3,831		3,694
Accrued selling and marketing		678		1,110
Accrued professional fees		1,292		1,505
Accrued warranty		25		44
Accrued restructuring		—		655
Other accrued expenses		4,357		3,966
Total accrued expenses and other current liabilities	$	14,724	$	15,495

In connection with strategic initiatives implemented during the year ended December 31, 2023, the Company's management approved and initiated plans to reduce its cost structure. During the three months ended June 30, 2024, the Company recorded less than $0.1 million in restructuring charges and paid less than $0.1 million in restructuring charges. During the six months ended June 30, 2024, the Company recorded less than $0.1 million in restructuring charges and paid $0.7 million in restructuring charges.

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Debt

6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

Debt

9. Debt

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

	June 30, 2024			December 31, 2023
Fortress Term Loan	$	—		$	43,100
RTW Convertible Notes	$	48,000		$	—
Total principal amount of debt		48,000			43,100
Change in fair value		(7,050	)		—
Plus: Accretion		—			148
Less: current portion of long-term debt, net of discounts		—			(38,643	)
Less: unamortized deferred financing costs and debt discounts		—			(4,605	)
Long-term debt, net of current portion and discounts	$	40,950		$	—

As of December 31, 2023, the fair value for the Company’s Fortress Term Loan approximated the carrying amount.

Term Loans

2021 Term Loan

In March 2021, the Company entered into a loan and security agreement (as amended, the “2021 Term Loan” and the “2021 Term Loan Agreement”) with Runway Growth Credit Fund, Inc. (“Runway”) that provided for borrowings up to $25.0 million.

In December 2021, the 2021 Term Loan Agreement was amended (the “Amendment”) to extend the maturity date of the 2021 Term Loan to December 30, 2025 and provide for an additional $20.0 million of borrowings. In December 2021, the Company issued warrants exercisable for 132,979 shares of Legacy Allurion Series C preferred stock as consideration for the Amendment and the draw down related to the 2021 Term Loan Agreement. The fair value of these warrants was determined to be $0.3 million upon issuance and are classified as a warrant liability on the condensed consolidated balance sheet as of June 30, 2024 and December 31, 2023 (see Note 11, Fair Value Measurements). Upon the closing of the Business Combination and after giving effect to the Reverse Stock Split, these warrants were converted into warrants exercisable for 5,203 shares of Allurion Common Stock.

In June 2022, the 2021 Term Loan Agreement was amended to revise definitional terms for certain milestone events, the final payment amount and certain financial covenants. In September 2022, the 2021 Term Loan Agreement was further amended to, among other things, increase additional borrowing up to $15.0 million.

During June through December of 2022, the Company drew an additional $30.0 million of the 2021 Term Loan and warrants exercisable for 88,440 shares of Series D-1 preferred stock were issued. The fair value of these warrants was determined to be $0.8 million upon issuance and are classified as a warrant liability on the consolidated balance sheets as of June 30, 2024 and December 31, 2023 (see Note 11, Fair Value Measurements). Upon the closing of the Business Combination and after giving effect to the Reverse Stock Split, the warrants exercisable for 88,440 shares of Series D-1 preferred stock were converted into warrants exercisable for 3,620 shares of Allurion Common Stock.

On August 1, 2023, the 2021 Term Loan was paid off using the proceeds from the Fortress Term Loan (see below). The total payoff amount was $58.0 million, consisting of $55.0 million repayment of principal, a $1.1 million prepayment fee, and a $1.6 million final payment fee. The prepayment fee was calculated as 2% of the outstanding principal balance as of August 1, 2023. The final payment fee was calculated as the 3% of the outstanding principal balance as of August 1, 2023 less the original final payment of $0.1 million. The Company recorded a $3.9 million loss on extinguishment of debt in connection with the 2021 Term Loan repayment.

Interest expense for the three months ended June 30, 2023 related to the 2021 Term Loan was $2.2 million, consisting of $2.0 million of contractual interest, less than $0.1 million of amortization of the debt discount, and $0.1 million amortization of warrant and term loan accretion. Interest expense for the six months ended June 30, 2023 related to the 2021 Term Loan was $4.3 million, consisting of $4.0 million of contractual interest, $0.1 million amortization of the debt discount, $0.1 million of amortization of the warrant, and $0.1 million of term loan accretion.

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 had a maturity date of June 30, 2027 and accrued 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 was payable in arrears on a monthly basis. The Fortress Term Loan provided for an exit payment equal to 3.0% of the Fortress Term Loan (the "Exit Fee") 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 will be 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 had 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 Allurion Common Stock at a conversion price based on the 30-day volume weighted average price ("VWAP") of Allurion 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. In connection with the modification and related prepayment, the Company wrote off $0.8 million of the unamortized debt issuance costs which was recorded within interest expense on the condensed consolidated statement of operations for the year ended December 31, 2023.

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% that will apply to all outstanding obligations during the occurrence and continuance of an event of default. In accordance with ASC 815, 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-measured 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 condensed consolidated statement of operations for the three and six months ended June 30, 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 condensed consolidated statement of operations for the three and six months ended June 30, 2024.

Interest expense for the three months ended June 30, 2024 related to the Fortress Term Loan was $0.3 million, consisting of $0.3 million of contractual interest and less than $0.1 million amortization of debt discount and term loan accretion. Interest expense for the six months ended June 30, 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%.

Convertible Notes

2021 Convertible Notes

In December 2021, the Company entered into a convertible note agreement with investors for gross proceeds of $2.0 million with a stated interest rate of 5.0% per annum (the “2021 Convertible Notes”) and a maturity date 36 months from the date of issuance unless previously converted pursuant to their terms of the agreement. No issuance costs were incurred.

The 2021 Convertible Notes provided that, effective upon either a Special Purpose Acquisition Company (i.e. “deSPAC”) transaction, closing of a qualified financing, or closing of a non-qualified financing, all of the outstanding principal and interest would automatically convert into shares of Legacy Allurion common stock or shares of the same class or series of capital stock issued in the qualified financing in an amount equal to the balance of the 2021 Convertible Notes on the date of conversion divided by the capped conversion price, which is calculated by dividing $600.0 million by the fully diluted capitalization of the Company immediately prior to the conversion of the 2021 Convertible Notes.

Interest expense for each of the three and six months ended June 30, 2023 related to the 2021 Convertible Notes was less than $0.1 million and $0.1 million, respectively, consisting entirely of contractual interest. Interest expense related to the 2021 Convertible Notes is recorded within Interest expense on the condensed consolidated statement of operations. On August 1, 2023, in connection with the closing of the Business Combination and after giving effect to the Reverse Stock Split, the outstanding 2021 Convertible Notes were converted into an aggregate 5,345 shares of Allurion Common Stock with a corresponding recognition of APIC of $2.2 million, and are no longer outstanding.

2022 Convertible Notes

In January 2022, the Company entered into a convertible note purchase agreement with investors for gross proceeds of $1.1 million with a stated interest rate of 5.0% per annum (the “2022 Convertible Notes”). The 2022 Convertible Notes were to mature 36 months from the issuance date unless previously converted pursuant to the terms of the agreement. Issuance costs were de minimis. The 2022 Convertible Notes had the same terms as the 2021 Convertible Notes.

Interest expense for each of the three and six months ended June 30, 2023 related to the 2022 Convertible Notes was less than $0.1 million, consisting entirely of contractual interest. Interest expense related to the 2022 Convertible Notes is recorded within Interest expense on the condensed consolidated statement of operations. On August 1, 2023, in connection with the closing of the Business Combination and after giving effect to the Reverse Stock Split, the outstanding 2022 Convertible Notes were converted into an aggregate 3,329 shares of Allurion Common Stock with a corresponding recognition of APIC of $1.2 million, and are no longer outstanding.

2023 Convertible Notes

Between February and August 2023, the Company entered into a convertible note purchase agreement, and related side letters, for the sale of convertible notes (the "2023 Convertible Notes") to certain investors for gross proceeds of $28.7 million, with a stated interest rate of 7.0% per annum. The 2023 Convertible Notes provided that they would mature on December 31, 2026 unless previously converted pursuant to the terms of the note purchase agreement. The 2023 Convertible Notes also provided that, effective upon a deSPAC transaction, all of the outstanding principal and interest would automatically convert into a number of shares of Legacy Allurion common stock equal to the balance of the 2023 Convertible Notes on the date of conversion divided by the discounted capped conversion price, which is calculated by dividing $217.3 million by the fully diluted capitalization of the Company immediately prior to the conversion of the 2023 Convertible Notes.

Additionally, the 2023 Convertible Notes provided that, effective upon the closing of a qualified financing, holders of the 2023 Convertible Notes could optionally accelerate repayment of the principal and interest of the 2023 Convertible Notes or convert all of the outstanding principal and interest into shares of Legacy Allurion common stock or shares of the same class or series of capital stock issued in the qualified financing equal to the balance of the 2023 Convertible Notes on the date of conversion divided by the greater of the capped price or the discounted price. The capped price is calculated by dividing $260.0 million by the fully diluted capitalization of the Company immediately prior to the conversion of the 2023 Convertible Notes, and the discounted price is calculated as 85% of the cash price of the same class or series of capital stock issued in the qualified financing. The 2023 Convertible Notes are accounted for under the fair FVO election of ASC 825 as the notes contain embedded derivatives, including the automatic conversion upon a deSPAC transaction prior to the deSPAC deadline, voluntary conversion upon a qualified financing, automatic

repayment upon a sale event, and conversion rate adjustment, which would require bifurcation and separate accounting. These convertible notes are 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.

Interest expense for each of the three and six months ended June 30, 2023 related to the 2023 Convertible Notes was $0.3 million and $0.4 million, respectively, consisting entirely of contractual interest. Interest expense related to the 2023 Convertible Notes is recorded within Interest expense on the condensed consolidated statement of operations.

On May 2, 2023 the Company entered into termination agreements (the “Termination Agreements”) with respect to side letters entered into with certain holders of the 2023 Convertible Notes. With respect to the Termination Agreement with one of the side letter holders (the “Side Letter Holder”), the Company had the right to prepay, in one or more transactions, all or a portion of the outstanding principal amount, plus accrued interest, under such holder's 2023 Convertible Note (the “Side Letter Holder Bridge Note”), including by way of (a) a $2 million payment in cash by the Company to the Side Letter Holder on May 2, 2023, $1.5 million of which was deemed a prepayment penalty and recorded as other expense on the income statement, with the remaining $0.5 million recorded as a reduction of the principal amount, (b) immediately prior to the consummation of the transactions contemplated by the Business Combination Agreement, an additional payment of at least $6 million, up to the then-outstanding principal amount, plus accrued interest, under the Side Letter Holder Bridge Note by way of (i) payment in cash by the Company and/or (ii) the sale and transfer of all or any portion of the Side Letter Holder Bridge Note, equivalent in value to the portion of the additional payment to be repaid pursuant to this clause (b)(ii), to any person or persons designated in writing by the Company. The Termination Agreements were accounted for as a modification of debt and the modified convertible notes continued to be accounted for under the FVO with any change in fair value recognized in other expense on the income statement.

In addition, under the Termination Agreement executed with the Side Letter Holder, the Company agreed to issue to the Side Letter Holder a number of shares of Allurion Common Stock (“PubCo Additional Shares”) equal to (a) the outstanding principal and accrued interest under the Side Letter Holder Bridge Note immediately prior to the consummation of the transactions contemplated by the Business Combination Agreement (after giving effect to the payment of the repayments) divided by $125.00, plus (b) 12,000 shares of Allurion Common Stock. The PubCo Additional Shares were accounted for as a freestanding financing liability. The liability for the PubCo Additional Shares was initially measured at its issue-date estimated fair value and subsequently remeasured at fair value at each reporting period, with changes in fair value reflected in earnings until the PubCo Additional Shares were issued. A $3.4 million liability was recorded at issuance for the PubCo Additional Shares as Other liabilities on the balance sheet. On August 1, 2023, upon closing of the Business Combination and after giving effect to the Reverse Stock Split, the Side Letter Holder was issued 15,508 PubCo Additional Shares with a corresponding recognition of APIC of $2.7 million, and the liability is no longer outstanding.

Further on May 2, 2023, RTW and Fortress (the “Backstop Purchasers”) entered into the Backstop Agreement with the Company, Legacy Allurion and the Side Letter Holder. Pursuant to the Backstop Agreement, each Backstop Purchaser agreed that to the extent any Side Letter Holder Bridge Notes remained outstanding prior to the consummation of the Business Combination, such Backstop Purchaser would, at the closing of the Business Combination, purchase up to $2.0 million of the Side Letter Holder Bridge Notes from the Side Letter Holder in exchange for shares of Allurion Common Stock (the “Base PubCo Shares”, “Backstop Shares” and “Conditional Additional PubCo Shares”). The Base PubCo Shares and Backstop Shares were accounted for as a freestanding financing liability. The Base PubCo Shares and Backstop Shares liability was initially measured at its issue-date estimated fair value and subsequently remeasured at fair value at each reporting period with changes in fair value reflected in earnings until the Base PubCo Shares and Backstop Shares were issued. A $3.3 million liability was recorded at issuance for the Base PubCo Shares and Backstop Shares liability as Other liabilities on the balance sheet. On August 1, 2023, upon closing of the Business Combination and after giving effect to the Reverse Stock Split, per the terms of the Fortress Term Loan, the Amended and Restated RTW Side Letter and Backstop Agreement, the Backstop Purchasers were each issued 38,000 shares of Allurion Common Stock with a corresponding recognition of APIC of $13.4 million, and the liability is no longer outstanding.

On August 1, 2023, immediately prior to the closing of the Business Combination and after giving effect to the Reverse Stock Split, the Company repaid $6.3 million of the Side Letter Holder Bridge Note, leaving a principal balance of $6.3 million. Each Backstop Purchaser then purchased $2.0 million principal amount of the outstanding portion of the Side Letter Holder Bridge Note, Allurion canceled the existing Side Letter Holder Bridge Note and issued a new convertible note to the Side Letter Holder for the remaining balance together with all unpaid interest accrued since the date of issuance of $2.7 million, Allurion issued convertible notes to each Backstop Purchaser with an issuance date of the Closing Date (August 1, 2023) and an original principal amount of $2.0 million each, and Allurion issued 28,000 shares of Allurion Common Stock to each Backstop Purchaser. Additionally, the outstanding 2023 Convertible Notes were converted into an aggregate 123,376 shares of Allurion Common Stock with a corresponding recognition of APIC of $22.2 million, and are no longer outstanding.

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 "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 $15,000,000 (the “Next Equity Financing”). On July 1, 2024, we consummated the Public Offering, as described elsewhere in this Quarterly Report on Form 10-Q/A, 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.

The RTW Convertible Notes are accounted for under the FVO election of ASC 825 as the notes contain embedded derivatives, including the conversion upon Stockholder Approval, the conversion upon a Fundamental Change Company Notice, the conversion upon a Make-Whole Fundamental Change, redemption upon the event of default, and redemption upon a Fundamental Change, which would require bifurcation and separate accounting. The RTW Convertible Notes are 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 was $49.1 million, with a corresponding $1.1 million loss recognized in Other income (expense), net in the condensed consolidated statement of operations. In connection with the issuance of the RTW Convertible Notes and RIFA Amendment (as defined below), we 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. For the three and six months ended June 30, 2024, the Company recorded an $8.0 million gain (as restated) and $0.1 million gain (as restated) through the condensed consolidated statements of operations and other comprehensive income (loss), respectively.

The Amended Note Purchase Agreement contains financial maintenance covenants, which require (i) the Company maintain not less than $12,500,000 in unrestricted cash in controlled accounts in the U.S. at all times, (ii) the Company to receive minimum trailing twelve-month consolidated revenue at amounts designated in the Amended Note Purchase Agreement, tested quarterly beginning with the twelve-month period ending March 31, 2025, and (iii) the Company's and its subsidiaries’ consolidated business operations outside the United States to be profitable for the trailing three-month period, tested quarterly beginning with the three-month period ending December 31, 2025. The Company is in compliance with the covenants in the Amended Note Purchase Agreement as of June 30, 2024.

The Company elected paid in kind interest for the three and six months ended June 30, 2024 related to the RTW Convertible Notes.

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Revenue Interest Financing, Side Letter, and PIPE Conversion Option

6 Months Ended

Jun. 30, 2024

Contract with Customer, Liability [Abstract]

Revenue Interest Financing, Side Letter, and PIPE Conversion Option

10. 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 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.

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 of ASC 825 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 our 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 condensed 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 expense due to the FVO election. As of June 30, 2024, the Company has made $2.1 million in royalty payments to RTW. Refer to Note 11, 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.

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 Investment 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 Investment. Such additions to the Investment Amount would result in proportional increases to the minimum aggregate revenue interest payments described above. 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 condensed 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. The PIPE Conversion Option liability is 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).

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. As of June 30, 2024, the Revenue Interest Financing and PIPE Conversion Option were re-measured to $39.0 million and $5.5 million, respectively.

For the three months ended June 30, 2024, the Company recorded a $8.1 million loss (as restated) and a $3.0 million gain (as restated) through the condensed consolidated statements of operations and other comprehensive income (loss), respectively. For the six months ended June 30, 2024, the Company recorded a $9.1 million loss (as restated) and a $5.2 million gain (as restated) through the condensed consolidated statements of operations and other comprehensive income (loss), respectively. The changes in fair value were recorded in the Changes in fair value of Revenue Interest Financing and PIPE Conversion Option in the condensed consolidated statement of operations.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

11. Fair Value Measurements

The following tables present the fair value hierarchy for the Company's 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):

Fair Value Measurement as of June 30, 2024
	Total Carrying Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Money market funds	$	13,304	$	13,304	$	—	$	—
Total assets	$	13,304	$	13,304	$	—	$	—
Liabilities:
Legacy Allurion Common Stock Warrant Liabilities	$	145	$	—	$	—	$	145
Public Warrants		2,113		2,113		—		—
Revenue Interest Financing		39,000		—		—		39,000
PIPE Conversion Option		5,450		—		—		5,450
Earn-out Liability		4,110		—		—		4,110
RTW Convertible Notes		40,950		—		—		40,950
Success Fee Derivative Liability		14		—		—		14
Total Liabilities	$	91,782	$	2,113	$	—	$	89,669

Fair Value Measurement as of December 31, 2023
	Total Carrying Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Money market funds	$	30,582	$	30,582	$	—	$	—
Total assets	$	30,582	$	30,582	$	—	$	—
Liabilities:
Legacy Allurion Common Stock Warrant Liabilities	$	821	$	—	$	—	$	821
Public Warrants		5,943		5,943		—		—
Revenue Interest Financing		36,200		—		—		36,200
PIPE Conversion Option (Restated)		6,410		—		—		6,410
Earn-out Liability		23,990		—		—		23,990
Term Loan Derivative Liability		1,895		—		—		1,895
Success Fee Derivative Liability		14		—		—		14
Total Liabilities	$	75,273	$	5,943	$	—	$	69,330

Public Warrants

As a result of the Business Combination on August 1, 2023, the Company recorded a liability for Public Warrants to purchase the Company's Common Stock. The Public Warrants are traded on the NYSE and are recorded at fair value using the closing price as June 30, 2024 of $0.16, which is a Level 1 input.

Legacy Allurion Warrants

The Company has classified the Legacy Allurion Common Stock Warrants 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:

	Measurement Date	Interest Rate			Exercise Price		Estimated Fair Value of Underlying Share Price		Expected Volatility			Expected Life (Years)
Legacy Allurion Series C Preferred Stock warrants (as converted to Common)	June 30, 2024		4.33	%	$	168.25	$	25.00		90	%		6.75
Other Common Stock	June 30, 2024		4.50	%		26.25		25.00		90	%		3.19
Legacy Allurion Series D-1 Preferred Stock warrants (as converted to Common)	June 30, 2024	4.33%-4.34%				303.50		25.00		90	%	6.75-8.21

	Measurement Date	Interest Rate	Exercise Price		Estimated Fair Value of Underlying Share Price		Expected Volatility			Expected Life (Years)
Legacy Allurion Series C Preferred Stock warrants (as converted to Common)	December 31, 2023	3.88%	$	168.25	$	93.50		100	%		7.25
Other Common Stock	December 31, 2023	3.95%		26.25		93.50		100	%		3.69
Legacy Allurion Series D-1 Preferred Stock warrants (as converted to Common)	December 31, 2023	3.88%		303.50		93.50		100	%	7.25-8.71

Expected dividend yield for all calculations is 0.00%.

The following table reconciles the changes in fair value for the three and six months ended June 30, 2024 and 2023 of the warrant liabilities valued using Level 3 inputs:

	Preferred Stock Warrants (as converted to Common)			Common Stock Warrants			Total
Balance – March 31, 2023	$	2,585		$	1,245		$	3,830
Change in fair value		98			106			204
Exercise of warrants		(4	)		—			(4	)
Balance – June 30, 2023	$	2,679		$	1,351		$	4,030
Balance – March 31, 2024	$	233		$	71		$	304
Change in fair value	$	(123	)	$	(36	)		(159	)
Balance – June 30, 2024	$	110		$	35		$	145

	Preferred Stock Warrants (as converted to Common)			Common Stock Warrants			Total
Balance – January 1, 2023	$	1,777		$	596		$	2,373
Change in fair value		924			755			1,679
Exercise of warrants		(22	)		—			(22	)
Balance – June 30, 2023	$	2,679		$	1,351		$	4,030
Balance – January 1, 2024	$	642		$	179		$	821
Change in fair value	$	(532	)	$	(144	)		(676	)
Balance – June 30, 2024	$	110		$	35		$	145

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 June 30, 2024 and December 31, 2023 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.

2023 Convertible Notes

The 2023 Convertible Notes were 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 re-measured at estimated fair value on a recurring basis at each reporting period date. The fair value was measured as of August 1, 2023, just prior to the conversion of the 2023 Convertible Notes, using the share price at conversion after giving effect to the Reverse Stock Split ($176.00 per share). Upon the conversion of the 2023 Convertible Notes, the convertible note liability was derecognized.

Revenue Interest Financing and PIPE Conversion Option

The Revenue Interest Financing is 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 June 30, 2024 and December 31, 2023 using a discounted cash flow ("DCF") method under the income approach utilizing future revenue projections and a discount rate of 30.1% and 24.4%, respectively.

The fair value of the PIPE Conversion Option was accounted for as a derivative under ASC 815. The instrument is measured using a Monte Carlo Simulation Method ("MCSM") using the number of shares convertible of 42,614 and the following assumptions:

	June 30, 2024			December 31, 2023
Stock Price	$	25.00		$	93.50
Risk-free interest rate		5.06	%		4.46	%
Expected term (in years)		1.1			1.6
Expected volatility		110.0	%		82.5	%

Earn-Out Liability

Upon the closing of the Business Combination, 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 MCSM with the following assumptions at each valuation date:

	June 30, 2024			December 31, 2023
Stock Price	$	25.00		$	93.50
Risk-free interest rate		4.4	%		3.9	%
Expected term (in years)		4.1			4.6
Expected volatility		103.0	%		87.0	%

Term Loan Derivative Liability

The Term Loan derivative liability associated with the Fortress Term Loan was derecognized as of June 30, 2024 as the Fortress Term Loan was repaid on April 16, 2024.

RTW Convertible Notes

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 June 30, 2024 using a DCF method under the income approach with a 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 $48.0 million principal amount of the RTW Convertible Notes and the following assumptions:

	June 30, 2024
Stock Price	$	25.00
Risk-free interest rate		4.3	%
Expected term (in years)		6.8
Expected volatility		80.0	%

The changes in the fair values of the Success Fee derivative liability, 2023 Convertible Notes, Revenue Interest Financing, PIPE Conversion Option, Earn-out liability, Term Loan Derivative liability, RTW Convertible Notes, PubCo Share liability, and Base PubCo and Backstop Share liability categorized with Level 3 inputs for the three months ended June 30, 2024 and 2023 were as follows:

	Success Fee Derivative Liability		2023 Convertible Notes			Revenue Interest  Financing			PIPE Conversion Derivative			Earn-Out Liability			Term Loan Derivative Liability			RTW Convertible Notes			PubCo Share Liability				Base PubCo & Backstop Share Liability		Total
Balance – March 31, 2023	$	207	$	13,600		$	—		$	—		$	—		$	—		$	—		$	—			$	—	$	13,807
Fair value upon issuance		—		5,950		$	—			—			—			—			—			3,370				3,264		12,584
Change in fair value		6		(2,257	)		—			—			—			—			—			(43	)			41		(2,253	)
Repayments of debt		—		(500	)		—			—			—			—			—			—				—		(500	)
Balance – June 30, 2023	$	213	$	16,793		$	—		$	—		$	—		$	—		$	—		$	3,327			$	3,305	$	23,638
Balance – March 31, 2024	$	14	$	—		$	35,000		$	7,510		$	9,800		$	1,957		$	—		$	—			$	—	$	54,281
Fair value upon issuance		—		—			—			—			—			—			49,100			—				—		49,100
Change in fair value (Restated)(1)		—		—			8,054			(2,060	)		(5,690	)		(1,957	)		(8,070	)		—		—		—		(9,723	)
Change in fair value - OCI (Restated)(1)		—		—			(3,000	)		—			—			—			(80	)		—		—		—		(3,080	)
Repayments of debt		—		—			(1,054	)		—			—			—			—			—		—		—		(1,054	)
Balance – June 30, 2024	$	14	$	—		$	39,000		$	5,450		$	4,110		$	—		$	40,950		$	—			$	—	$	89,524

(1) As discussed in FN 2, Restatement of Previously Issued Financial Statements, the Company identified an error in its historical financial statements related to the change in fair value due to instrument specific credit risk for the Revenue Interest Financing and RTW Convertible Notes. The only restated numbers in the table above relate to the 'Change in fair value' and 'Change in fair value - OCI' for both the Revenue Interest Financing and RTW Convertible Notes.

	Success Fee Derivative Liability		2023 Convertible Notes			Revenue Interest  Financing			PIPE Conversion Derivative			Earn-Out Liability			Term Loan Derivative Liability			RTW Convertible Notes			PubCo Share Liability			Base PubCo & Backstop Share Liability		Total
Balance – January 1, 2023	$	178	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	178
Fair value upon issuance		—		19,550		$	—			—			—			—			—			3,370			3,264		26,184
Change in fair value		35		(2,257	)		—			—			—			—			—			(43	)		41		(2,224	)
Repayments of debt		—		(500	)		—			—			—			—			—			—			—		(500	)
Balance – June 30, 2023	$	213	$	16,793		$	—		$	—		$	—		$	—		$	—		$	3,327		$	3,305	$	23,638
Balance – January 1, 2024 (Restated)(1)	$	14	$	—		$	36,200		$	6,410		$	23,990		$	1,895		$	—		$	—		$	—	$	68,509
Fair value upon issuance		—		—			—			—			—			—			49,100			—			—		49,100
Change in fair value (Restated)(1)		—		—			9,054			(960	)		(19,880	)		(1,895	)		(8,070	)		—			—		(21,751	)
Change in fair value - OCI (Restated)(1)		—		—			(5,200	)		—			—			—			(80	)		—			—		(5,280	)
Repayments of debt		—		—			(1,054	)		—			—			—			—			—			—		(1,054	)
Balance – June 30, 2024	$	14	$	—		$	39,000		$	5,450		$	4,110		$	—		$	40,950		$	—		$	—	$	89,524

(1) As discussed in FN 2, Restatement of Previously Issued Financial Statements, the Company identified an error in its historical financial statements related to the change in fair value due to instrument specific credit risk for the Revenue Interest Financing and RTW Convertible Notes, as well as a change in fair value of the PIPE Conversion Option. The only restated numbers in the table above relate to the 'Change in fair value' and 'Change in fair value - OCI' for both the Revenue Interest Financing and RTW Convertible Notes, as well as the 'Change in fair value' and 'Balance - January 1, 2024' related to the PIPE Conversion Option.

The change in fair value of the Success Fee derivative liability, 2023 Convertible Notes, Revenue Interest Financing, PIPE Conversion Option, Earn-Out liability, Term Loan Derivative liability, RTW Convertible Notes, Pubco Share liability, and Base PubCo and Backstop Share liability at each period is recorded as a component of Other income (expense) in the condensed 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, which is recorded as a component of other comprehensive loss.

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Income Taxes

6 Months Ended

Jun. 30, 2024

Income Tax Disclosure [Abstract]

Income Taxes

12. Income Taxes

The Company recorded income tax expense for each of the three and six months ended June 30, 2024 of $0.1 million, representing effective tax rates of (0.8%) (as restated) and (2.3%) (as restated), respectively. The Company recorded income tax expense for the three and six months ended June 30, 2023 of less than $0.1 million and $0.1 million, respectively, representing effective tax rates of (0.1%) in both periods. The tax expense recorded relates to the earnings of the Company’s profitable foreign subsidiaries.

As of June 30, 2024 and 2023, the Company maintained a full valuation allowance against its net deferred tax assets as the Company has incurred significant operating losses since inception and has concluded that its net deferred tax asset is not more-likely-than-not realizable.

As of June 30, 2024 and 2023, the Company has not recorded tax reserves for any uncertain tax provisions.

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Capital Stock and Stockholders' Deficit

6 Months Ended

Jun. 30, 2024

Equity [Abstract]

Capital Stock and Stockholders' Deficit

13. Capital Stock and Stockholders' Deficit

The Allurion Certificate of Incorporation authorizes the issuance of up to 100,000,000 shares of Allurion preferred stock. As of June 30, 2024, no shares of Allurion preferred stock were outstanding.

Common Equity

The Allurion Certificate of Incorporation authorizes the issuance of up to 1,000,000,000 shares of Allurion Common Stock. As of June 30, 2024 and December 31, 2023, 1,918,927 and 1,907,529 shares of Common Stock were outstanding, respectively, after retrospectively adjusting for the effect of the reverse recapitalization and Reverse Stock Split.

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 June 30, 2024, is as follows:

Outstanding options to purchase Common Stock	288,172
Restricted Stock Units	23,738
Warrants to purchase Common Stock	16,151
Shares of Common Stock issued upon the exercise of Public Warrants	750,383
Earn-Out Shares	360,000
Convertible Notes	19,168
Total	1,457,612

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 June 30, 2024, there were 16,151 such 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.

June 30, 2024
Issuance Date	Remaining Contractual Term (in years)		Underlying Equity Instrument	Balance Sheet Classification	Shares Issuable Upon Exercise of Warrant		Weighted Average Exercise Price
12/1/2014		0.4	Common Stock	Equity		1,771	$	61.00
3/30/2021		6.7	Common Stock	Liability		5,203		168.25
9/15/2022		8.2	Common Stock	Liability		1,810		303.50
6/4/2022		7.9	Common Stock	Liability		1,810		303.50
1/17/2017		2.5	Common Stock	Equity		2,934		0.50
8/3/2017		3.1	Common Stock	Equity		392		28.25
9/8/2017		3.2	Common Stock	Liability		1,151		26.25
6/19/2018		4.0	Common Stock	Liability		720		26.25
6/25/2019		5.0	Common Stock	Liability		360		26.25
						16,151

December 31, 2023
Issuance Date	Remaining Contractual Term (in years)		Underlying Equity Instrument	Balance Sheet Classification	Shares Issuable Upon Exercise of Warrant		Weighted Average Exercise Price
12/1/2014		0.9	Common Stock	Equity		1,771	$	61.00
3/30/2021		7.2	Common Stock	Liability		5,203		168.25
9/15/2022		8.7	Common Stock	Liability		1,810		303.50
6/4/2022		8.4	Common Stock	Liability		1,810		303.50
1/17/2017		3.0	Common Stock	Equity		2,934		0.50
8/3/2017		3.6	Common Stock	Equity		392		28.25
9/8/2017		3.7	Common Stock	Liability		1,151		26.25
6/19/2018		4.5	Common Stock	Liability		720		26.25
6/25/2019		5.5	Common Stock	Liability		360		26.25
						16,151

In Compute Health's initial public offering, it sold units at a price of $10.00 per unit, which consisted of one share of Class A Common Stock, $0.0001 par value, of Compute Health ("Class A Common Stock") and one-half of a redeemable warrant (each a "Public Warrant") that entitled the holder the right to purchase one share of Class A Common Stock of CPUH at a price of $11.50 per share. 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 after giving effect to the Reverse Stock Split, each of the outstanding Compute Health Public Warrants

became exercisable for 0.056818 shares of the Company’s Common Stock at an exercise price of $202.50 per share and each whole 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.

The Company may redeem the outstanding Public Warrants for cash at a price of $0.25 per Public Warrant at any time commencing 90 days after the completion of the Business Combination, and provided that the last sales price the Company’s Common Stock equals or exceeds $316.75 per share of any 20 trading days within a 30-day trading period ending on the third trading day prior to the date on which notice of redemption is given.

The Company may redeem the outstanding Public Warrants for shares of our Common Stock at a price of $2.50 per Public Warrant at any time commencing 90 days after the completion of the Business Combination, and provided that the last sales price of the Company’s Common Stock equals or exceeds $176.00 per share of any 20 trading days within a 30-day trading period ending on the third trading day prior to the date on which notice of redemption is given. Holders of the Public Warrants will be able to exercise their warrants on a cashless basis prior to redemption and receive that number of shares based on the redemption date and the fair market value (the “Redemption Fair Market Value”) of the shares of the Company's Common Stock. The Redemption Fair Market Value is determined based on the volume weighted average price of the Company’s Common Stock for the ten trading days immediately following the date on which notice of redemption is sent to the holders. As of June 30, 2024, the Company has not redeemed any of the outstanding Public Warrants. As of June 30, 2024, 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 (the "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 issued 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 immediately following commencement. As of June 30, 2024, the Company had sold 5,730 shares of Common Stock to Chardan at a purchase price of $0.4 million in connection with the Purchase Agreement.

Public Offering and Concurrent Private Placement

On July 1, 2024, the Company closed the Public Offering (as defined below) and Private Placement (as defined below) for gross proceeds of $17.3 million and $2.7 million, respectively. On July 5, 2024 the Underwriters (as defined below) exercised a portion of the option for additional gross proceeds of $2.3 million. Refer to Note 20, Subsequent Events, for further information regarding the Public Offering and Private Placement.

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Net Loss per Share

6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Net Loss per Share

14. Net Loss per Share

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Numerator:
Net loss	$	(8,322	)	$	(21,996	)	$	(6,326	)	$	(39,797	)
Cumulative undeclared preferred dividends to participating securities (Legacy Series D convertible preferred stock)		—			(725	)		—			(1,442	)
Net loss attributable to common shareholders	$	(8,322	)	$	(22,721	)	$	(6,326	)	$	(41,239	)
Denominator:
Weighted-average common shares outstanding - basic and diluted		1,917,872			1,084,300			1,914,527			1,083,897
Net loss per share attributable to common shareholders, basic and diluted	$	(4.34	)	$	(20.95	)	$	(3.30	)	$	(38.05	)

For the three and six months ended June 30, 2024 and 2023, 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 share number of shares of Common Stock outstanding used to calculate both basic and diluted net loss per share attributable to common shareholders is the same. The Company excluded the following potential shares of Common Stock, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common shareholders for the periods indicated because including them would have had an anti-dilutive effect.

	As of June 30,
	2024		2023
Outstanding options to purchase Common Stock		288,172		165,442
Restricted Stock Units		23,738		56,605
Warrants to purchase Common Stock		16,151		17,307
Shares of Common Stock issued upon the exercise of Public Warrants		750,383		—
Earn-Out Shares		360,000		—
Convertible Notes		19,168		139,599
Total		1,457,612		378,953

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Stock Based Compensation

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Stock Based Compensation

15. 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 cancelled 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.

In connection 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. As of June 30, 2024, a total of 339,982 shares of Allurion Common Stock are reserved for issuance under the 2023 Plan. The 2023 Plan provides that the number of

shares reserved for issuance under the 2023 Plan will automatically increase each January 1, beginning January 1, 2024 and ending January 1, 2033, 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 June 30, 2024, 311,685 options and RSUs were issued and outstanding under the 2010 Plan, 2020 Plan, and 2023 Plan. As of December 31, 2023, 181,186 options and RSUs were issued and outstanding under the 2010 Plan, 2020 Plan, and 2023 Plan. The stock options generally vest over a four-year period and expire 10 years from the date of grant.

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Cost of revenue	$	6	$	3	$	11	$	15
Selling, general and administrative		768		372		1,318		758
Research and development		31		26		28		37
Total stock-based compensation expense	$	805	$	401	$	1,357	$	810

Stock Options

The following table summarizes the option activity under the 2010 Plan, 2020 Plan, and the 2023 Plan during the six months ended June 30, 2024:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
				(per option)		(in years)		(in thousands)
Outstanding—January 1, 2024		155,441		$	66.75		6.9	$	5,565
Granted		147,443			46.50
Cancellations and forfeitures		(14,290	)		60.25
Exercised		(646	)		34.25
Outstanding—June 30, 2024		287,948			56.75		8.2		14
Exercisable at June 30, 2024		114,409		$	59.75		6.1	$	12

Total stock compensation expense related to stock option awards during the three and six months ended June 30, 2024 was $0.5 million and $0.8 million, respectively. As of June 30, 2024, there was approximately $6.3 million of unrecognized compensation costs related to unvested stock options granted under the 2010 Plan, 2020 Plan, and 2023 Plan, which is expected to be recognized over a weighted-average vesting term of 3.2 years. The weighted average grant-date fair value of the stock option awards granted during the six months ended June 30, 2024 was $32.50 per option.

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 that 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.

There were no grants during the six months ended June 30, 2023. The assumptions used in the Black Scholes option-pricing model for the six months ended June 30, 2024 are as follows:

	Six Months Ended June 30,
	2024
Expected volatility		71	%
Risk-free interest rate		4.36	%
Expected dividend yield		0	%
Expected term (in years)		6.1

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. See Note 4, Business Combination for information about the closing of the Business Combination with Compute Health. Upon the satisfaction of the closing condition, 62.5% of the RSUs awarded vested. Thereafter, the remaining 37.5% of the RSUs will vest monthly over a period of two years. All RSUs are subject to forfeiture if the grantee’s continuous service relationship as a member of the Board of Directors terminates prior to vesting. In October 2023 and March 2024, the Company issued RSUs to its Board of Director members that will vest in equal installments over three years, subject to continued service as a director through each vesting date. The following table summarizes the restricted stock unit activity under the 2020 Plan and 2023 Plan during the three months ended June 30, 2024:

	Number of RSUs			Weighted Average Grant Date Fair Value
				(per share)
Outstanding—January 1, 2024		25,745		$	111.25
Granted		3,000		65.25
Cancellations and forfeitures		—
Vested		(5,010	)		112.74
Outstanding—June 30, 2024		23,735		$	105.00

Total stock compensation expense related to RSUs for the three and six months ended June 30, 2024 was $0.3 million and $0.6 million, respectively. As of June 30, 2024, there were $1.3 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 1.8 years.

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 56,893 shares of the Company's Common Stock are reserved and authorized for issuance under the 2023 ESPP. 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 less number of shares determined by the administrator of the 2023 ESPP. As of June 30, 2024, no shares have been issued under the 2023 ESPP.

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Employee Benefit Plan

6 Months Ended

Jun. 30, 2024

Retirement Benefits [Abstract]

Employee Benefit Plan

16. 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 three and six months ended June 30, 2024 and 2023, the Company's matching contributions to the plan were less than $0.1 million.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

17. 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.

In February 2023 and August 2023, the Company executed amendments to three of its leases in Natick, Massachusetts and its Hudson, Massachusetts lease, respectively. The amendments were accounted for as a modification of the existing lease agreements, with impacts to the lease term, lease payments, and related lease liability for each of the four leases. As a result of these amendments, the leases in Natick and Hudson will now expire between March 2025 and March 2028, and additional operating lease assets obtained in exchange for lease obligations were $0.9 million. 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 will now expire in March 2025 and additional operating lease assets obtained in exchange for lease obligations were less than $0.1 million. In February 2024, the Company terminated one of its leases in Paris, France.

As of June 30, 2024, the Company was a party to six different leases for office, manufacturing, and laboratory space under non-cancelable office leases in three cities. These leases total approximately 51,000 square feet and will expire between June 2024 and March 2028. The Company has a right to extend certain of these leases for periods between three and five years. The Company also holds immaterial leases related to vehicles and office equipment. Under its 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 components of right-of-use ("ROU") assets and lease liabilities are included in the condensed 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 condensed consolidated balance sheets.

Aggregate Lease Information

Other pertinent lease information for the three and six months ended June 30, 2024 and 2023 is as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Operating lease costs	$	257	$	275	$	535	$	549
Short-term lease costs		10		7		20		13
Variable lease costs		58		72		135		160
Operating cash flows paid for amounts in the    measurement of lease liabilities		263		284		555		546
Operating lease assets obtained in exchange    for lease obligations		15		—		15		874

Future commitments under non-cancelable operating lease agreements as of June 30, 2024 are as follows (in thousands):

2024	$	535
2025		1,035
2026		730
2027		641
2028		108
Total lease payments	$	3,049
Less: present value adjustment		(411	)
Total lease liabilities		2,638
Less: current lease liability		(850	)
Long-term operating lease liabilities	$	1,788

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

	June 30, 2024			June 30, 2023
Weighted -average remaining lease term (in years)		3.1			3.9
Weighted-average discount rate		9.9	%		9.5	%

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 actions, 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. As of June 30, 2024 and December 31, 2023, the Company has not recorded accruals for probable losses related to any existing or pending litigation or claims as the Company’s management has determined that there are no matters where a potential loss is probable and reasonably estimable. The Company does not believe that any existing or pending claims would have a material impact on the Company’s consolidated financial statements.

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Segment Information

6 Months Ended

Jun. 30, 2024

Segment Reporting [Abstract]

Segment Information

18. Segment Information

Segment reporting is prepared on the same basis that the Company's chief executive officer, who is our chief operating decision maker (“CODM”), manages the business, makes operating decisions, and assesses performance. The Company operates in one 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 5, Revenue for information on revenue by geography. Significant segment expenses are set forth in the following table (in thousands):

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Revenue	$	11,766		$	12,960		$	21,152		$	27,031
Less:
Cost of revenue		2,773			2,992			5,293			5,932
Sales and marketing		6,718			10,273			12,863			22,137
Clinical trials and medical affairs		2,371			3,672			5,642			8,333
Product development		739			1,066			1,783			2,493
Digital		621			1,117			1,369			2,100
Quality and regulatory		579			726			1,241			1,507
General and administrative		7,311			6,408			13,697			11,714
Other segment items (1)		(1,024	)		8,702			(14,410	)		12,612
Net loss	$	(8,322	)	$	(21,996	)	$	(6,326	)	$	(39,797	)

(1) Other segment items included in Net income 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):

	June 30, 2024		December 31, 2023
United States	$	5,008	$	5,381
France	$	727		1,010
All other countries		—		—
Long-lived assets	$	5,735	$	6,391

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Related-party Transactions

6 Months Ended

Jun. 30, 2024

Related Party Transactions [Abstract]

Related-party Transactions

19. 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 term of the lease was 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.

Consulting Agreements with KKG Enterprises, LLC and Remus Group Management, LLC

In the first quarter of 2023, Allurion entered into consulting agreements with KKG Enterprises, LLC (“KKG Enterprises”) and Remus Group Management, LLC (“Remus Group Management”) to assist Allurion in building out its AI platform, augment its AI advisory board, and provide advisory services related to the Business Combination. These agreements were tied to Allurion Board-related work by Krishna Gupta, who is a director of Allurion, CEO of Remus Group Management, principal at KKG Enterprises, and affiliated with Romulus Capital, a stockholder of Allurion. The agreements included payments of $0.2 million to KKG Enterprises and $0.3 million to Remus Group Management as board compensation to Krishna Gupta. These agreements were terminated on June 20, 2023.

Convertible Note with Hunter Ventures Limited

On February 15, 2023, Allurion sold $13 million of 2023 Convertible Notes to HVL and entered into a Side Letter with HVL, who is a limited partner of Romulus Growth Allurion L.P., which is a fund affiliated with Krishna Gupta (a director of Allurion; in addition, entities affiliated with him hold more than 5% of our outstanding common stock). Refer to Note 9, Debt for additional information regarding the 2023 Convertible Notes.

Consulting Agreement with Related Party

In September 2023, Allurion France, a French société par actions simplifiée and wholly-owned subsidiary of Allurion ("Allurion France"), entered into a new corporate officer agreement with the Company's then-Chief Commercial Officer and Benoit Chardon Consulting, a French société à responsabilité limitée which is solely owned by Mr. Chardon ("BCC"), pursuant to which BCC agreed to serve as Managing Director of Allurion France. The new corporate officer agreement provided that BCC would receive base consulting fees of €28,333.33 per month and additional variable compensation subject to the incentive plan terms issued annually by Allurion and conditional on meeting Allurion France and personal performance attainment defined each year by Allurion. This agreement was terminated on December 12, 2023 by virtue of the termination agreement described below, effective December 31, 2023.

Termination Agreement with Related Party

On December 12, 2023, Allurion France entered into a termination agreement with the Company's Chief Commercial Officer, Benoit Chardon, and BCC. Pursuant to the termination agreement, the parties agreed to terminate the corporate officer agreement as of December 31, 2023 and BCC resigned from its duties as managing director of Allurion France effective December 31, 2023; Allurion paid BCC all amounts due to it under the corporate officer agreement through December 31, 2023. In addition, Allurion paid BCC a lump-sum termination fee of $0.2 million.

Convertible Note Agreement with RTW

Pursuant to the Amended Note Purchase Agreement, on April 16, 2024, we issued and sold $48 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, and has the right to approve an additional director nominee for election at our 2024 annual meeting of stockholders (with such approval not to be unreasonably withheld), which such nominee shall go through our director nomination process led by the Nominating and Corporate Governance Committee of Allurion's board of directors. Refer to Note 9, Debt, for additional information regarding the RTW Convertible Notes.

RTW Participation in Public Offering

In connection with the Public Offering (as defined below), 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 (as defined below), the Company agreed to sell to RTW 2,260,159 shares of Series A Preferred Stock (as defined below), and 90,407 Private Placement Warrants (as defined below), for an aggregate purchase price of approximately $2.7 million. The Private Placement closed on July 1, 2024.

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Subsequent Events

6 Months Ended

Jun. 30, 2024

Subsequent Events [Abstract]

Subsequent Events

20. Subsequent Events

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"). Pursuant to the Underwriting Agreement, the Company also granted the Underwriters an option exercisable for 30 days to purchase up to an additional 86,440 shares of Common Stock and/or 86,440 Public Offering Warrants at the public offering price. On July 1, 2024, the Underwriters exercised the option with respect to the Public Offering Warrants in full, which resulted in the issuance of an additional 86,440 Public Offering Warrants at the closing. The Public Offering closed on July 1, 2024 with total gross proceeds of $17.3 million, before deducting the Underwriters' discounts and commissions and estimated offering expenses payable by the Company. Further, the Underwriters exercised a portion of the option with respect to the Common Stock on July 5, 2024 for total gross proceeds of $2.3 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.

Private Placement

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, Series A non-voting convertible preferred stock, par value $0.0001 per share ("Series A Preferred Stock"), and 90,407 private placement warrants ("Private Placement Warrants") to purchase common stock, for an aggregate purchase price of approximately $2.7 million at a purchase price per share of Series A Preferred Stock and accompanying Private Placement Warrant equal to the per share Public Offering price for the shares of common stock and Public Offering Warrants in the Public Offering (the "Private Placement"). The Private Placement closed on July 1, 2024 with total gross proceeds received from RTW of $2.7 million.

French Regulatory Decision

On August 6, 2024, it was announced that the Agence Nationale de Sécurité du Médicament (“ANSM”), the French regulatory authority, has suspended sales of the Allurion Balloon in France, and the Company is withdrawing the device from the French market, pending implementation of a remediation plan to reduce certain risks associated with the advertising, follow-up program, and adverse events for the Allurion Balloon.

NYSE Letter

On August 12, 2024, we received a letter from NYSE notifying us that, as of August 8, 2024, for the last 30 consecutive business days, the average closing price of the Company’s common stock was less than $1.00 per share, the minimum average closing bid price required by the continued listing requirements of Rule 802.01C of the NYSE Listed Company Manual. A company can regain compliance with the minimum share price requirement at any time during the six-month cure period if, on the last trading day of any calendar month during the cure period, the company has (i) a closing share price of at least $1.00 and (ii) an average closing share price of at least $1.00 over the 30 trading-day period ending on the last trading day of that month. In the event that at the expiration of the six-month cure period, both a $1.00 closing share price on the last trading day of the cure period and a $1.00 average closing share price over the 30 trading-day period ending on the last trading day of the cure period are not attained, the NYSE will commence suspension and delisting procedures. We intend to monitor the closing bid price of our Common Stock and may, if appropriate, consider available options to regain compliance with the NYSE minimum share price requirement.

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Use of Estimates

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 condensed 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.

RTW Convertible Notes

RTW Convertible Notes

The Company accounted for the RTW Convertible Notes (defined below) under the fair value options ("FVO") election of ASC Topic 825, Financial Instruments ("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 condensed 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.

Reclassification of Prior Year Presentation

Reclassification of Prior Year Presentation

Certain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no effect on the reported results of operations. Adjustment has been made to the condensed consolidated statement of operations for the three and six months ended June 30, 2023, to present the change in fair value of derivative liabilities as part of Other income (expense), net. This amount was a separate line item in prior years.

Risk of Concentration of Credit, Significant Customers and Significant Suppliers

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 three and six months ended June 30, 2024 and 2023 or accounts receivable, net balance as of June 30, 2024 and December 31, 2023. The following table presents customers that represent 10% or more of the Company’s total revenue and accounts receivable, net:

	Revenue		Revenue		Accounts Receivable
	Three Months Ended June 30,		Six Months Ended June 30,		June 30,			December 31,
	2024	2023	2024	2023	2024			2023
Customer A	N/A	N/A	N/A	N/A		12	%		16	%

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.

Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Adopted

Recently Adopted Accounting Pronouncements

In August 2020, the FASB issued ASU 2020-06, Debt with Conversion and Other Options and Derivatives and Hedging—Contracts in Entity’s Own Equity, which simplifies the accounting for convertible instruments. The guidance removes certain accounting models which separate the embedded conversion features from the host contract for convertible instruments. The Company adopted ASU 2020-06 effective January 1, 2024 under the modified retrospective method of transition approach. The adoption of ASU 2020-06 did not have an impact on the Company’s condensed consolidated financial statements.

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires disclosure of incremental segment information on an interim and annual basis. The Company adopted ASU 2023-07 effective January 1, 2024 under the retrospective method. We have disclosed significant segment expenses, other segment items, and our measure of segment profit or loss in Note 18, Segment Information.

Recently Issued Accounting Pronouncements Not Yet Adopted

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires 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. This ASU is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial statements and related disclosures.

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Restatement of Previously Issued Condensed Consolidated Financial Statements (Tables)

6 Months Ended

Jun. 30, 2024

Accounting Changes and Error Corrections [Abstract]

Schedule of Restatement of Previously Issued Condensed Consolidated Financial Statements

The effects of the restatements on the condensed consolidated financial statements as of and for the three and six months ended June 30, 2024 are as follows:

Restated Condensed Consolidated Balance Sheet

(dollars in thousands)

	As of June 30, 2024
	As Reported			Adjustment			As Restated
Assets
Current assets:
Cash and cash equivalents	$	19,258		$	—		$	19,258
Accounts receivable, net of allowance of doubtful accounts		13,357			—			13,357
Inventory, net		4,788			—			4,788
Prepaid expenses and other current assets		2,902			—			2,902
Total current assets		40,305			—			40,305
Property and equipment, net		3,254			—			3,254
Right-of-use asset		2,481			—			2,481
Other long-term assets		510			—			510
Total assets	$	46,550		$	—		$	46,550
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	7,984		$	—		$	7,984
Current portion of lease liabilities		850			—			850
Accrued expenses and other current liabilities		14,724			—			14,724
Total current liabilities		23,558			—			23,558
Public warrant liabilities		2,113			—			2,113
Revenue Interest Financing liability		39,000			—			39,000
Earn-out liabilities		4,110			—			4,110
Convertible notes payable		40,950			—			40,950
Lease liabilities, net of current portion		1,788			—			1,788
Other liabilities		5,613			—			5,613
Total liabilities		117,132			—			117,132
Commitments and Contingencies
Stockholders’ deficit:
Preferred stock, $0.0001 par value — 100,000,000 shares authorized as of June 30, 2024; and no shares issued and outstanding as of June 30, 2024		—			—			—
Common stock, $0.0001 par value — 1,000,000,000 shares authorized as of June 30, 2024; and 1,918,927 shares issued and outstanding as of June 30, 2024		2			—			2
Additional paid-in capital		144,771			—			144,771
Accumulated other comprehensive income (loss)		(5,980	)		11,960			5,980
Accumulated deficit		(209,375	)		(11,960	)		(221,335	)
Total stockholders’ deficit		(70,582	)		—			(70,582	)
Total liabilities and stockholders’ deficit	$	46,550		$	—		$	46,550

Restated Condensed Consolidated Statement of Operations

(dollars in thousands)

	Three months ended June 30, 2024									Six months ended June 30, 2024
	As Reported			Adjustment			As Restated			As Reported			Adjustment			As Restated
Revenue	$	11,766		$	—		$	11,766		$	21,152		$	—		$	21,152
Cost of revenue		2,773			—			2,773			5,293			—			5,293
Gross profit		8,993			—			8,993			15,859			—			15,859
Operating expenses:
Sales and marketing		6,718			—			6,718			12,863			—			12,863
Research and development		4,310			—			4,310			10,035			—			10,035
General and administrative		7,311			—			7,311			13,697			—			13,697
Total operating expenses:		18,339			—			18,339			36,595			—			36,595
Loss from operations		(9,346	)		—			(9,346	)		(20,736	)		—			(20,736	)
Other income (expense):
Interest expense		(339	)		—			(339	)		(2,270	)		—			(2,270	)
Changes in fair value of warrants		1,376			—			1,376			4,507			—			4,507
Changes in fair value of debt		8,230			(160	)		8,070			8,230			(160	)		8,070
Changes in fair value of Revenue Interest Financing and PIPE Conversion Option		6			(6,000	)		(5,994	)		1,496			(9,590	)		(8,094	)
Changes in fair value of earn-out liabilities		5,690			—			5,690			19,880			—			19,880
Loss on extinguishment of debt		(8,713	)		—			(8,713	)		(8,713	)		—			(8,713	)
Other income (expense), net		999			—			999			1,171			—			1,171
Total other income (expense):		7,249			(6,160	)		1,089			24,301			(9,750	)		14,551
Income (loss) before income taxes		(2,097	)		(6,160	)		(8,257	)		3,565			(9,750	)		(6,185	)
Provision for income taxes		(65	)		—			(65	)		(141	)		—			(141	)
Net income (loss)	$	(2,162	)	$	(6,160	)	$	(8,322	)	$	3,424		$	(9,750	)	$	(6,326	)
Net income (loss) per share
Basic	$	(1.13	)	$	(3.21	)	$	(4.34	)	$	1.79		$	(5.09	)	$	(3.30	)
Diluted	$	(1.13	)	$	(3.21	)	$	(4.34	)	$	1.67		$	(4.97	)	$	(3.30	)
Weighted-average shares outstanding
Basic		1,917,872			—			1,917,872			1,914,527			—			1,914,527
Diluted		1,917,872			—			1,917,872			1,959,881			(45,354	)		1,914,527

Restated Condensed Consolidated Statement of Comprehensive Income

(dollars in thousands)

	Three months ended June 30, 2024									Six months ended June 30, 2024
	As Reported			Adjustment			As Restated			As Reported			Adjustment			As Restated
Net income (loss)	$	(2,162	)	$	(6,160	)	$	(8,322	)	$	3,424		$	(9,750	)	$	(6,326	)
Other comprehensive loss:
Change in fair value of Revenue Interest Financing due to change in credit risk		(3,000	)		6,000		$	3,000			(5,200	)		10,400			5,200
Change in fair value of RTW Convertible Notes due to change in credit risk		(80	)		160		$	80			(80	)		160			80
Comprehensive Income (loss)	$	(5,242	)	$	—		$	(5,242	)	$	(1,856	)	$	810		$	(1,046	)

Restated Condensed Consolidated Statement of Cash Flows

(dollars in thousands)

	Six Months Ended June 30, 2024
	Originally Reported			Adjustment			As Restated
Operating Activities:
Net income (loss)	$	3,424		$	(9,750	)	$	(6,326	)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash lease expense		362			—		362
Depreciation and amortization		564			—		564
Stock-based compensation		1,357			—			1,357
Unrealized exchange (gain) or loss		373			—			373
Provision for inventory		369			—			369
Change in fair value of warrant liabilities		(4,507	)		—			(4,507	)
Change in fair value of derivative liabilities		(1,895	)		—			(1,895	)
Change in fair value of Revenue Interest Financing and PIPE Conversion Option		(1,496	)		9,590			8,094
Change in fair value of earn-out liabilities		(19,880	)		—			(19,880	)
Interest paid on debt recorded at fair value		(1,054	)		—			(1,054	)
Change in fair value of debt		(8,230	)		160			(8,070	)
Debt issuance costs associated with debt recorded at fair value		1,357			—			1,357
Non-cash interest expense		1,464			—			1,464
Loss on term loan extinguishment		8,713			—			8,713
Changes in operating assets and liabilities:					—
Accounts receivable		4,412			—			4,412
Inventory		1,014			—			1,014
Prepaid expenses, other current and long-term assets		718			—			718
Lease liabilities		(411	)		—			(411	)
Accounts payable		(2,504	)		—			(2,504	)
Accrued expenses and other current liabilities		(1,713	)		—			(1,713	)
Net cash used in operating activities	$	(17,563	)	$	—		$	(17,563	)
Investing Activities:
Purchases of property and equipment		(539	)		—			(539	)
Net cash used in investing activities	$	(539	)	$	—		$	(539	)
Financing Activities:
Proceeds from issuance of convertible notes		48,000			—			48,000
Proceeds from option and warrant exercises		26			—			26
Proceeds from equity line financing		378			—			378
Repayment of convertible notes		—			—			—
Payment of deferred financing costs		—			—			—
Payment of debt issuance costs		(1,357	)		—			(1,357	)
Repayment of Fortress term loan		(47,720	)		—			(47,720	)
Net cash provided by (used in) financing activities	$	(673	)	$	—		$	(673	)
Net decrease in cash and cash equivalents and restricted cash		(18,775	)		—			(18,775	)
Cash and cash equivalents and restricted cash at beginning of period		38,421			—			38,421
Cash and cash equivalents and restricted cash at end of period	$	19,646		$	—		$	19,646
Supplemental disclosure of cash flow information
Cash paid for interest	$	2,672		$	—		$	2,672
Supplemental cash flow information on non-cash investing and financing activities							0
Purchase of property and equipment included in accounts payable	$	31		$	—		$	31
Deferred financing costs in accounts payable and accrued expenses		1,207			—			1,207
Change in fair value of RTW Convertible Notes through OCI		—			80			80
Change in fair value of Revenue Interest Financing through OCI		(5,280	)		10,480			5,200

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Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Summary of Risk of Concentration of Credit, Significant Customers

The following table presents customers that represent 10% or more of the Company’s total revenue and accounts receivable, net:

	Revenue		Revenue		Accounts Receivable
	Three Months Ended June 30,		Six Months Ended June 30,		June 30,			December 31,
	2024	2023	2024	2023	2024			2023
Customer A	N/A	N/A	N/A	N/A		12	%		16	%

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Business Combination (Tables)

6 Months Ended

Jun. 30, 2024

Business Combinations [Abstract]

Reconciles of Business Combination to Condensed Consolidated Statement

The following table reconciles the elements of the Business Combination to the condensed consolidated statement of cash flows and the condensed consolidated statement of changes in equity:

	December 31, 2023
Cash – CPUH trust (net of redemptions)	$	38,395
Cash – PIPE Investors		37,922
Gross Proceeds		76,317
Less: transaction costs paid		(14,665	)
Net proceeds from the Business Combination		61,652
Less: warrant liabilities assumed		(13,762	)
Less: repayment of note assumed in the Business Combination		(2,500	)
Less: accrued transaction costs at December 31, 2023		(580	)
Business Combination, net of transaction costs	$	44,810

Number of Shares of Allurion Common Stock Outstanding

The number of shares of Allurion Common Stock outstanding immediately following the consummation of the Business Combination and after giving effect to the Reverse Stock Split was as follows:

	Common Stock
Legacy Allurion Equityholders (1)		1,115,896
CPUH Stockholders (2)		206,628
Shares Issued to PIPE Investors (2)		215,468
Shares issued to RTW and Fortress (3)		76,000
Shares issued to convertible note holders		132,049
CPUH Sponsor Shares (2)		130,509
Side Letter Termination Shares (3)		15,508
Total shares of Common Stock immediately after    Business Combination		1,892,058

(1) Consists of Legacy Allurion common stock and Legacy Allurion preferred stock, plus the issuance of common stock in connection with the vesting of RSUs at closing, less the Gaur Trust Contributed Shares (as defined below).

(2) The CPUH Stockholders shares, PIPE shares, and CPUH Sponsor shares are presented combined within the condensed consolidated statements of stockholders deficit on the "Reverse recapitalization, net of transaction costs" line, which is less the Gaur Trust Contributed Shares (as defined below).

(3) The shares issued to RTW and Fortress and the Side Letter Termination shares are presented combined within the condensed consolidated statements of stockholders deficit on the "Derecognition of liabilities associated with the Backstop Shares, Hunter shares, and additional RTW and Fortress shares and issuance of related shares" line.

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Revenue (Tables)

6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Revenues by Geographic Region

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

	Three Months Ended June 30,
	2024		2023
France	$	1,866	$	1,258
Spain		1,450		896
All Other Countries		8,450		10,806
Total Revenues	$	11,766	$	12,960

	Six Months Ended June 30,
	2024		2023
France	$	3,536	$	3,113
Spain		2,562		2,520
United Kingdom		2,173		2,257
All Other Countries		12,881		19,141
Total Revenues	$	21,152	$	27,031

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Inventory (Tables)

6 Months Ended

Jun. 30, 2024

Table Text Block [Abstract]

Schedule of Inventory

Inventory consists of the following (in thousands):

	June 30, 2024		December 31, 2023
Finished goods	$	2,760	$	3,427
Work in progress		767		967
Raw materials		1,261		1,777
Total Inventory	$	4,788	$	6,171

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Property and Equipment, net (Tables)

6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

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

	Estimated Useful Life (in Years)	June 30, 2024			December 31, 2023
Computers and purchased software	3	$	618		$	618
Leasehold improvements	Shorter of useful life or lease term		1,943			1,943
Furniture and fixtures	5		291			291
Machinery and equipment	3-5		3,072			2,893
Property and equipment—at cost			5,924			5,745
Less accumulated depreciation and amortization			(3,984	)		(3,559	)
Construction in progress			1,314			1,195
Property and equipment—net		$	3,254		$	3,381

Schedule of Depreciation Expense

Depreciation expense was $0.2 million for each of the three months ended June 30, 2024 and 2023, and $0.6 million and $0.4 million for the six months ended June 30, 2024 and 2023, respectively, recorded as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Cost of revenue	$	112	$	59	$	314	$	218
Research and development		50		46	$	99		83
General and administrative		21		35	$	84		70
Sales and marketing		14		14	$	67		28
Total depreciation and amortization expense	$	197	$	154	$	564	$	399

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Accrued Expenses and Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2024

Accrued Liabilities and Other Liabilities [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

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

	June 30, 2024		December 31, 2023
Marketing reimbursement	$	1,620	$	2,834
Accrued compensation		2,921		1,687
Accrued clinical trials and R&D		3,831		3,694
Accrued selling and marketing		678		1,110
Accrued professional fees		1,292		1,505
Accrued warranty		25		44
Accrued restructuring		—		655
Other accrued expenses		4,357		3,966
Total accrued expenses and other current liabilities	$	14,724	$	15,495

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Debt (Tables)

6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

Summary of Components of Third-Party Debt

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

	June 30, 2024			December 31, 2023
Fortress Term Loan	$	—		$	43,100
RTW Convertible Notes	$	48,000		$	—
Total principal amount of debt		48,000			43,100
Change in fair value		(7,050	)		—
Plus: Accretion		—			148
Less: current portion of long-term debt, net of discounts		—			(38,643	)
Less: unamortized deferred financing costs and debt discounts		—			(4,605	)
Long-term debt, net of current portion and discounts	$	40,950		$	—

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2024

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Schedule of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value at Issuance Date and on Recurring Basis

The following tables present the fair value hierarchy for the Company's 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):

Fair Value Measurement as of June 30, 2024
	Total Carrying Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Money market funds	$	13,304	$	13,304	$	—	$	—
Total assets	$	13,304	$	13,304	$	—	$	—
Liabilities:
Legacy Allurion Common Stock Warrant Liabilities	$	145	$	—	$	—	$	145
Public Warrants		2,113		2,113		—		—
Revenue Interest Financing		39,000		—		—		39,000
PIPE Conversion Option		5,450		—		—		5,450
Earn-out Liability		4,110		—		—		4,110
RTW Convertible Notes		40,950		—		—		40,950
Success Fee Derivative Liability		14		—		—		14
Total Liabilities	$	91,782	$	2,113	$	—	$	89,669

Fair Value Measurement as of December 31, 2023
	Total Carrying Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Money market funds	$	30,582	$	30,582	$	—	$	—
Total assets	$	30,582	$	30,582	$	—	$	—
Liabilities:
Legacy Allurion Common Stock Warrant Liabilities	$	821	$	—	$	—	$	821
Public Warrants		5,943		5,943		—		—
Revenue Interest Financing		36,200		—		—		36,200
PIPE Conversion Option (Restated)		6,410		—		—		6,410
Earn-out Liability		23,990		—		—		23,990
Term Loan Derivative Liability		1,895		—		—		1,895
Success Fee Derivative Liability		14		—		—		14
Total Liabilities	$	75,273	$	5,943	$	—	$	69,330

Schedule of Assumptions used in Pricing Model

The Company has classified the Legacy Allurion Common Stock Warrants 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:

	Measurement Date	Interest Rate			Exercise Price		Estimated Fair Value of Underlying Share Price		Expected Volatility			Expected Life (Years)
Legacy Allurion Series C Preferred Stock warrants (as converted to Common)	June 30, 2024		4.33	%	$	168.25	$	25.00		90	%		6.75
Other Common Stock	June 30, 2024		4.50	%		26.25		25.00		90	%		3.19
Legacy Allurion Series D-1 Preferred Stock warrants (as converted to Common)	June 30, 2024	4.33%-4.34%				303.50		25.00		90	%	6.75-8.21

	Measurement Date	Interest Rate	Exercise Price		Estimated Fair Value of Underlying Share Price		Expected Volatility			Expected Life (Years)
Legacy Allurion Series C Preferred Stock warrants (as converted to Common)	December 31, 2023	3.88%	$	168.25	$	93.50		100	%		7.25
Other Common Stock	December 31, 2023	3.95%		26.25		93.50		100	%		3.69
Legacy Allurion Series D-1 Preferred Stock warrants (as converted to Common)	December 31, 2023	3.88%		303.50		93.50		100	%	7.25-8.71

Schedule of Changes in Fair Values

The following table reconciles the changes in fair value for the three and six months ended June 30, 2024 and 2023 of the warrant liabilities valued using Level 3 inputs:

	Preferred Stock Warrants (as converted to Common)			Common Stock Warrants			Total
Balance – March 31, 2023	$	2,585		$	1,245		$	3,830
Change in fair value		98			106			204
Exercise of warrants		(4	)		—			(4	)
Balance – June 30, 2023	$	2,679		$	1,351		$	4,030
Balance – March 31, 2024	$	233		$	71		$	304
Change in fair value	$	(123	)	$	(36	)		(159	)
Balance – June 30, 2024	$	110		$	35		$	145

	Preferred Stock Warrants (as converted to Common)			Common Stock Warrants			Total
Balance – January 1, 2023	$	1,777		$	596		$	2,373
Change in fair value		924			755			1,679
Exercise of warrants		(22	)		—			(22	)
Balance – June 30, 2023	$	2,679		$	1,351		$	4,030
Balance – January 1, 2024	$	642		$	179		$	821
Change in fair value	$	(532	)	$	(144	)		(676	)
Balance – June 30, 2024	$	110		$	35		$	145

Schedule of Estimated Fair Value was Measured Using a Monte Carlo Simulation Method

The assumptions used in the Black Scholes option-pricing model for the six months ended June 30, 2024 are as follows:

	Six Months Ended June 30,
	2024
Expected volatility		71	%
Risk-free interest rate		4.36	%
Expected dividend yield		0	%
Expected term (in years)		6.1

Public Warrants

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Schedule of Changes in Fair Values

The changes in the fair values of the Success Fee derivative liability, 2023 Convertible Notes, Revenue Interest Financing, PIPE Conversion Option, Earn-out liability, Term Loan Derivative liability, RTW Convertible Notes, PubCo Share liability, and Base PubCo and Backstop Share liability categorized with Level 3 inputs for the three months ended June 30, 2024 and 2023 were as follows:

	Success Fee Derivative Liability		2023 Convertible Notes			Revenue Interest  Financing			PIPE Conversion Derivative			Earn-Out Liability			Term Loan Derivative Liability			RTW Convertible Notes			PubCo Share Liability				Base PubCo & Backstop Share Liability		Total
Balance – March 31, 2023	$	207	$	13,600		$	—		$	—		$	—		$	—		$	—		$	—			$	—	$	13,807
Fair value upon issuance		—		5,950		$	—			—			—			—			—			3,370				3,264		12,584
Change in fair value		6		(2,257	)		—			—			—			—			—			(43	)			41		(2,253	)
Repayments of debt		—		(500	)		—			—			—			—			—			—				—		(500	)
Balance – June 30, 2023	$	213	$	16,793		$	—		$	—		$	—		$	—		$	—		$	3,327			$	3,305	$	23,638
Balance – March 31, 2024	$	14	$	—		$	35,000		$	7,510		$	9,800		$	1,957		$	—		$	—			$	—	$	54,281
Fair value upon issuance		—		—			—			—			—			—			49,100			—				—		49,100
Change in fair value (Restated)(1)		—		—			8,054			(2,060	)		(5,690	)		(1,957	)		(8,070	)		—		—		—		(9,723	)
Change in fair value - OCI (Restated)(1)		—		—			(3,000	)		—			—			—			(80	)		—		—		—		(3,080	)
Repayments of debt		—		—			(1,054	)		—			—			—			—			—		—		—		(1,054	)
Balance – June 30, 2024	$	14	$	—		$	39,000		$	5,450		$	4,110		$	—		$	40,950		$	—			$	—	$	89,524

(1) As discussed in FN 2, Restatement of Previously Issued Financial Statements, the Company identified an error in its historical financial statements related to the change in fair value due to instrument specific credit risk for the Revenue Interest Financing and RTW Convertible Notes. The only restated numbers in the table above relate to the 'Change in fair value' and 'Change in fair value - OCI' for both the Revenue Interest Financing and RTW Convertible Notes.

	Success Fee Derivative Liability		2023 Convertible Notes			Revenue Interest  Financing			PIPE Conversion Derivative			Earn-Out Liability			Term Loan Derivative Liability			RTW Convertible Notes			PubCo Share Liability			Base PubCo & Backstop Share Liability		Total
Balance – January 1, 2023	$	178	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	178
Fair value upon issuance		—		19,550		$	—			—			—			—			—			3,370			3,264		26,184
Change in fair value		35		(2,257	)		—			—			—			—			—			(43	)		41		(2,224	)
Repayments of debt		—		(500	)		—			—			—			—			—			—			—		(500	)
Balance – June 30, 2023	$	213	$	16,793		$	—		$	—		$	—		$	—		$	—		$	3,327		$	3,305	$	23,638
Balance – January 1, 2024 (Restated)(1)	$	14	$	—		$	36,200		$	6,410		$	23,990		$	1,895		$	—		$	—		$	—	$	68,509
Fair value upon issuance		—		—			—			—			—			—			49,100			—			—		49,100
Change in fair value (Restated)(1)		—		—			9,054			(960	)		(19,880	)		(1,895	)		(8,070	)		—			—		(21,751	)
Change in fair value - OCI (Restated)(1)		—		—			(5,200	)		—			—			—			(80	)		—			—		(5,280	)
Repayments of debt		—		—			(1,054	)		—			—			—			—			—			—		(1,054	)
Balance – June 30, 2024	$	14	$	—		$	39,000		$	5,450		$	4,110		$	—		$	40,950		$	—		$	—	$	89,524

(1) As discussed in FN 2, Restatement of Previously Issued Financial Statements, the Company identified an error in its historical financial statements related to the change in fair value due to instrument specific credit risk for the Revenue Interest Financing and RTW Convertible Notes, as well as a change in fair value of the PIPE Conversion Option. The only restated numbers in the table above relate to the 'Change in fair value' and 'Change in fair value - OCI' for both the Revenue Interest Financing and RTW Convertible Notes, as well as the 'Change in fair value' and 'Balance - January 1, 2024' related to the PIPE Conversion Option.

Earn-Out Liability

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Schedule of Estimated Fair Value was Measured Using a Monte Carlo Simulation Method

The estimated fair value of the Earn-Out Shares was determined using a MCSM with the following assumptions at each valuation date:

	June 30, 2024			December 31, 2023
Stock Price	$	25.00		$	93.50
Risk-free interest rate		4.4	%		3.9	%
Expected term (in years)		4.1			4.6
Expected volatility		103.0	%		87.0	%

Term Loan Derivative Liability

The Term Loan derivative liability associated with the Fortress Term Loan was derecognized as of June 30, 2024 as the Fortress Term Loan was repaid on April 16, 2024.

Revenue Interest Financing and PIPE Conversion Option

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Schedule of Estimated Fair Value was Measured Using a Monte Carlo Simulation Method

The fair value of the PIPE Conversion Option was accounted for as a derivative under ASC 815. The instrument is measured using a Monte Carlo Simulation Method ("MCSM") using the number of shares convertible of 42,614 and the following assumptions:

	June 30, 2024			December 31, 2023
Stock Price	$	25.00		$	93.50
Risk-free interest rate		5.06	%		4.46	%
Expected term (in years)		1.1			1.6
Expected volatility		110.0	%		82.5	%

RTW Convertible Notes

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Schedule of Estimated Fair Value was Measured Using a Monte Carlo Simulation Method

The fair value was measured using the $48.0 million principal amount of the RTW Convertible Notes and the following assumptions:

	June 30, 2024
Stock Price	$	25.00
Risk-free interest rate		4.3	%
Expected term (in years)		6.8
Expected volatility		80.0	%

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Capital Stock and Stockholders' Deficit (Tables)

6 Months Ended

Jun. 30, 2024

Equity [Abstract]

Summary of Reserved for Issuance Upon the Potential Conversion or Exercise

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 June 30, 2024, is as follows:

Outstanding options to purchase Common Stock	288,172
Restricted Stock Units	23,738
Warrants to purchase Common Stock	16,151
Shares of Common Stock issued upon the exercise of Public Warrants	750,383
Earn-Out Shares	360,000
Convertible Notes	19,168
Total	1,457,612

Summary of Warrants to Purchase the Classes of Preferred Stock and Common Stock Outstanding

As of June 30, 2024, there were 16,151 such 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.

June 30, 2024
Issuance Date	Remaining Contractual Term (in years)		Underlying Equity Instrument	Balance Sheet Classification	Shares Issuable Upon Exercise of Warrant		Weighted Average Exercise Price
12/1/2014		0.4	Common Stock	Equity		1,771	$	61.00
3/30/2021		6.7	Common Stock	Liability		5,203		168.25
9/15/2022		8.2	Common Stock	Liability		1,810		303.50
6/4/2022		7.9	Common Stock	Liability		1,810		303.50
1/17/2017		2.5	Common Stock	Equity		2,934		0.50
8/3/2017		3.1	Common Stock	Equity		392		28.25
9/8/2017		3.2	Common Stock	Liability		1,151		26.25
6/19/2018		4.0	Common Stock	Liability		720		26.25
6/25/2019		5.0	Common Stock	Liability		360		26.25
						16,151

December 31, 2023
Issuance Date	Remaining Contractual Term (in years)		Underlying Equity Instrument	Balance Sheet Classification	Shares Issuable Upon Exercise of Warrant		Weighted Average Exercise Price
12/1/2014		0.9	Common Stock	Equity		1,771	$	61.00
3/30/2021		7.2	Common Stock	Liability		5,203		168.25
9/15/2022		8.7	Common Stock	Liability		1,810		303.50
6/4/2022		8.4	Common Stock	Liability		1,810		303.50
1/17/2017		3.0	Common Stock	Equity		2,934		0.50
8/3/2017		3.6	Common Stock	Equity		392		28.25
9/8/2017		3.7	Common Stock	Liability		1,151		26.25
6/19/2018		4.5	Common Stock	Liability		720		26.25
6/25/2019		5.5	Common Stock	Liability		360		26.25
						16,151

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Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Cost of revenue	$	6	$	3	$	11	$	15
Selling, general and administrative		768		372		1,318		758
Research and development		31		26		28		37
Total stock-based compensation expense	$	805	$	401	$	1,357	$	810

Summary of Option Activity Under the Plan

The following table summarizes the option activity under the 2010 Plan, 2020 Plan, and the 2023 Plan during the six months ended June 30, 2024:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
				(per option)		(in years)		(in thousands)
Outstanding—January 1, 2024		155,441		$	66.75		6.9	$	5,565
Granted		147,443			46.50
Cancellations and forfeitures		(14,290	)		60.25
Exercised		(646	)		34.25
Outstanding—June 30, 2024		287,948			56.75		8.2		14
Exercisable at June 30, 2024		114,409		$	59.75		6.1	$	12

Schedule of Assumptions Used in Black-Scholes Option Pricing Model

The assumptions used in the Black Scholes option-pricing model for the six months ended June 30, 2024 are as follows:

	Six Months Ended June 30,
	2024
Expected volatility		71	%
Risk-free interest rate		4.36	%
Expected dividend yield		0	%
Expected term (in years)		6.1

Summary of Restricted Stock Unit Activity Under the Plan

The following table summarizes the restricted stock unit activity under the 2020 Plan and 2023 Plan during the three months ended June 30, 2024:

	Number of RSUs			Weighted Average Grant Date Fair Value
				(per share)
Outstanding—January 1, 2024		25,745		$	111.25
Granted		3,000		65.25
Cancellations and forfeitures		—
Vested		(5,010	)		112.74
Outstanding—June 30, 2024		23,735		$	105.00

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Other Pertinent Lease Information

Other pertinent lease information for the three and six months ended June 30, 2024 and 2023 is as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Operating lease costs	$	257	$	275	$	535	$	549
Short-term lease costs		10		7		20		13
Variable lease costs		58		72		135		160
Operating cash flows paid for amounts in the    measurement of lease liabilities		263		284		555		546
Operating lease assets obtained in exchange    for lease obligations		15		—		15		874

Schedule of Future Commitments Under Non-cancelable Operating Lease Agreements

Future commitments under non-cancelable operating lease agreements as of June 30, 2024 are as follows (in thousands):

2024	$	535
2025		1,035
2026		730
2027		641
2028		108
Total lease payments	$	3,049
Less: present value adjustment		(411	)
Total lease liabilities		2,638
Less: current lease liability		(850	)
Long-term operating lease liabilities	$	1,788

Schedule of Weighted-Average Remaining Lease Terms and Discount Rates Related Leases

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

	June 30, 2024			June 30, 2023
Weighted -average remaining lease term (in years)		3.1			3.9
Weighted-average discount rate		9.9	%		9.5	%

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2024

Segment Reporting [Abstract]

Schedule of Significant Segment Expenses

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Revenue	$	11,766		$	12,960		$	21,152		$	27,031
Less:
Cost of revenue		2,773			2,992			5,293			5,932
Sales and marketing		6,718			10,273			12,863			22,137
Clinical trials and medical affairs		2,371			3,672			5,642			8,333
Product development		739			1,066			1,783			2,493
Digital		621			1,117			1,369			2,100
Quality and regulatory		579			726			1,241			1,507
General and administrative		7,311			6,408			13,697			11,714
Other segment items (1)		(1,024	)		8,702			(14,410	)		12,612
Net loss	$	(8,322	)	$	(21,996	)	$	(6,326	)	$	(39,797	)

(1) Other segment items included in Net income 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.

Schedule of Long-lived Assets by Geography

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

	June 30, 2024		December 31, 2023
United States	$	5,008	$	5,381
France	$	727		1,010
All other countries		—		—
Long-lived assets	$	5,735	$	6,391

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Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Summary of Basic and Diluted Net Loss per Share

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Restated)						(Restated)
Numerator:
Net loss	$	(8,322	)	$	(21,996	)	$	(6,326	)	$	(39,797	)
Cumulative undeclared preferred dividends to participating securities (Legacy Series D convertible preferred stock)		—			(725	)		—			(1,442	)
Net loss attributable to common shareholders	$	(8,322	)	$	(22,721	)	$	(6,326	)	$	(41,239	)
Denominator:
Weighted-average common shares outstanding - basic and diluted		1,917,872			1,084,300			1,914,527			1,083,897
Net loss per share attributable to common shareholders, basic and diluted	$	(4.34	)	$	(20.95	)	$	(3.30	)	$	(38.05	)

Summary of Dilutive Securities Excluded from Computation of Basic and Diluted Net Loss Per Common Share

The Company excluded the following potential shares of Common Stock, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common shareholders for the periods indicated because including them would have had an anti-dilutive effect.

	As of June 30,
	2024		2023
Outstanding options to purchase Common Stock		288,172		165,442
Restricted Stock Units		23,738		56,605
Warrants to purchase Common Stock		16,151		17,307
Shares of Common Stock issued upon the exercise of Public Warrants		750,383		—
Earn-Out Shares		360,000		—
Convertible Notes		19,168		139,599
Total		1,457,612		378,953

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Organization and Basis of Presentation - Additional Information (Details)				3 Months Ended		6 Months Ended
	Dec. 23, 2024 shares	Dec. 16, 2024	Aug. 01, 2023 shares	Jun. 30, 2024 USD ($) Country $ / shares shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) Country $ / shares shares	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) $ / shares shares
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Number of countries, currently markets the program | Country				50		50
Common stock, par value | $ / shares				$ 0.0001		$ 0.0001		$ 0.0001
Gains (losses) from foreign currency translation adjustment | $				$ (100,000)	$ (100,000)	$ (400,000)
Losses from operations | $				9,346,000	$ 13,294,000	20,736,000	$ 27,185,000
Cash outflows from operating activities | $						17,563,000	20,017,000
Accumulated deficit | $				$ 221,335,000		$ 221,335,000		$ 215,009,000
Common stock, shares outstanding | shares			1,892,058	1,918,927		1,918,927		1,907,529
Warrants exercisable price | $ / shares				$ 202.5		$ 202.5
Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Gains (losses) from foreign currency translation adjustment | $							$ 100,000
Common Stock
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Stockholders' equity note, stock split	Reverse Stock Split, adjusted for the 25:1 reverse stock split ratio.
Common Stock | Business Combination Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Exchange ratio			0.978
Common Stock | Public Warrants
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Warrants exercisable price | $ / shares				$ 202.5		$ 202.5
Public share warrants issued | shares	25
Public share warrants exercisable | shares				0.056818		0.056818
Public share warrants exercisable before reverse stock split | shares	1.420455
Common Stock | Reverse Stock Split
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Stockholders' equity note, stock split		a ratio between 1-for-10 and 1-for-25, with the final ratio to be determined by the Board in its sole discretion.
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 to its Charter to effectuate the Reverse Stock Split.
Reverse stock split ratio	0.4
Common stock, shares outstanding | shares	25

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Restatement of Previously Issued Condensed Consolidated Financial Statements - Restated Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Aug. 01, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 19,258		$ 38,037
Accounts receivable, net of allowance of doubtful accounts	13,357		18,194
Inventory, net	4,788		6,171
Prepaid expenses and other current assets	2,902		2,414
Total current assets	40,305		64,816
Property and equipment, net	3,254		3,381
Right-of-use asset	2,481		3,010
Other long-term assets	510		505
Total assets	46,550		71,712
Current liabilities:
Accounts payable	7,984		10,379
Current portion of lease liabilities	850		908
Accrued expenses and other current liabilities	14,724		15,495
Total current liabilities	23,558		65,425
Warrant liabilities	2,113		5,943
Revenue Interest Financing liability	39,000		36,200
Earn-out liabilities	4,110		23,990	$ 53,000
Convertible notes payable	40,950
Lease liabilities, net of current portion	1,788		2,306
Other liabilities	5,613		9,145
Total liabilities	117,132		143,009
Commitments and Contingencies
Stockholders' deficit:
Preferred stock, $0.0001 par value - 100,000,000 shares authorized as of June 30, 2024; no shares issued and outstanding as of June 30, 2024
Common stock, $0.0001 par value - 1,000,000,000 shares authorized as of June 30, 2024; and 1,918,927 shares issued and outstanding as of June 30, 2024	2		2
Additional paid-in capital	144,771		143,010	$ 15,200
Accumulated other comprehensive income (loss)	5,980		700
Accumulated deficit	(221,335)		(215,009)
Total stockholders' deficit	(70,582)	$ (66,162)	(71,297)		$ (71,218)	$ (49,657)	$ (32,314)
Total liabilities and stockholders' deficit	46,550		$ 71,712
As Reported
Current assets:
Cash and cash equivalents	19,258
Accounts receivable, net of allowance of doubtful accounts	13,357
Inventory, net	4,788
Prepaid expenses and other current assets	2,902
Total current assets	40,305
Property and equipment, net	3,254
Right-of-use asset	2,481
Other long-term assets	510
Total assets	46,550
Current liabilities:
Accounts payable	7,984
Current portion of lease liabilities	850
Accrued expenses and other current liabilities	14,724
Total current liabilities	23,558
Warrant liabilities	2,113
Revenue Interest Financing liability	39,000
Earn-out liabilities	4,110
Convertible notes payable	40,950
Lease liabilities, net of current portion	1,788
Other liabilities	5,613
Total liabilities	117,132
Commitments and Contingencies
Stockholders' deficit:
Preferred stock, $0.0001 par value - 100,000,000 shares authorized as of June 30, 2024; no shares issued and outstanding as of June 30, 2024
Common stock, $0.0001 par value - 1,000,000,000 shares authorized as of June 30, 2024; and 1,918,927 shares issued and outstanding as of June 30, 2024	2
Additional paid-in capital	144,771
Accumulated other comprehensive income (loss)	(5,980)
Accumulated deficit	(209,375)
Total stockholders' deficit	(70,582)
Total liabilities and stockholders' deficit	46,550
Adjustment
Stockholders' deficit:
Accumulated other comprehensive income (loss)	11,960
Accumulated deficit	$ (11,960)

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Restatement of Previously Issued Condensed Consolidated Financial Statements - Restated Condensed Consolidated Balance Sheet (Parenthetical) (Details) - $ / shares	Jun. 30, 2024	Dec. 31, 2023	Aug. 01, 2023
Accounting Changes and Error Corrections [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	1,918,927	1,907,529
Common stock, shares outstanding	1,918,927	1,907,529	1,892,058

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Restatement of Previously Issued Condensed Consolidated Financial Statements - Restated Condensed Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenue	$ 11,766		$ 12,960		$ 21,152	$ 27,031
Cost of Revenue	2,773		2,992		5,293	5,932
Gross profit	8,993		9,968		15,859	21,099
Operating expenses:
Sales and marketing	6,718		10,273		12,863	22,137
Research and development	4,310		6,581		10,035	14,433
General and administrative	7,311		6,408		13,697	11,714
Total operating expenses:	18,339		23,262		36,595	48,284
Loss from operations	(9,346)		(13,294)		(20,736)	(27,185)
Other income (expense):
Interest expense	(339)		(2,508)		(2,270)	(4,745)
Changes in fair value of warrants	1,376		(204)		4,507	(1,679)
Changes in fair value of debt	8,070		2,257		8,070	2,257
Changes in fair value of Revenue Interest Financing and PIPE Conversion Option	(5,994)				(8,094)
Changes in fair value of earn-out liabilities	5,690				19,880
Loss on extinguishment of debt	(8,713)				(8,713)	(0)
Other income (expense), net	999		(91)		1,171	(255)
Total other income (expense):	1,089		(8,680)		14,551	(12,556)
Loss before income taxes	(8,257)		(21,974)		(6,185)	(39,741)
Provision for income taxes	(65)		(22)		(141)	(56)
Net loss	$ (8,322)	$ 1,996	$ (21,996)	$ (17,801)	$ (6,326)	$ (39,797)
Net income (loss) per share - Basic	$ (4.34)		$ (20.95)		$ (3.3)	$ (38.05)
Net income (loss) per share - Diluted	$ (4.34)		$ (20.95)		$ (3.3)	$ (38.05)
Weighted-average shares outstanding - Basic	1,917,872		1,084,300		1,914,527	1,083,897
Weighted-average shares outstanding - diluted	1,917,872		1,084,300		1,914,527	1,083,897
As Reported
Income Statement [Abstract]
Revenue	$ 11,766				$ 21,152
Cost of Revenue	2,773				5,293
Gross profit	8,993				15,859
Operating expenses:
Sales and marketing	6,718				12,863
Research and development	4,310				10,035
General and administrative	7,311				13,697
Total operating expenses:	18,339				36,595
Loss from operations	(9,346)				(20,736)
Other income (expense):
Interest expense	(339)				(2,270)
Changes in fair value of warrants	1,376				4,507
Changes in fair value of debt	8,230				8,230
Changes in fair value of Revenue Interest Financing and PIPE Conversion Option	6				1,496
Changes in fair value of earn-out liabilities	5,690				19,880
Loss on extinguishment of debt	(8,713)				(8,713)
Other income (expense), net	999				1,171
Total other income (expense):	7,249				24,301
Loss before income taxes	(2,097)				3,565
Provision for income taxes	(65)				(141)
Net loss	$ (2,162)				$ 3,424
Net income (loss) per share - Basic	$ (1.13)				$ 1.79
Net income (loss) per share - Diluted	$ (1.13)				$ 1.67
Weighted-average shares outstanding - Basic	1,917,872				1,914,527
Weighted-average shares outstanding - diluted	1,917,872				1,959,881
Adjustment
Other income (expense):
Changes in fair value of debt	$ (160)				$ (160)
Changes in fair value of Revenue Interest Financing and PIPE Conversion Option	(6,000)				(9,590)
Total other income (expense):	(6,160)				(9,750)
Loss before income taxes	(6,160)				(9,750)
Net loss	$ (6,160)				$ (9,750)
Net income (loss) per share - Basic	$ (3.21)				$ (5.09)
Net income (loss) per share - Diluted	$ (3.21)				$ (4.97)
Weighted-average shares outstanding - diluted					(45,354)

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Restatement of Previously Issued Condensed Consolidated Financial Statements - Restated Condensed Consolidated Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Income (loss)	$ (8,322)	$ 1,996	$ (21,996)	$ (17,801)	$ (6,326)	$ (39,797)
Other comprehensive loss:
Change in fair value due to change in credit risk	8,100				9,100
Comprehensive Income (loss)	(5,242)		$ (21,996)		(1,046)	$ (39,797)
Revenue Interest Financing
Other comprehensive loss:
Change in fair value due to change in credit risk	3,000				5,200
RTW Convertible Notes
Other comprehensive loss:
Change in fair value due to change in credit risk	80				80
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Income (loss)	(2,162)				3,424
Other comprehensive loss:
Comprehensive Income (loss)	(5,242)				(1,856)
As Reported | Revenue Interest Financing
Other comprehensive loss:
Change in fair value due to change in credit risk	(3,000)				(5,200)
As Reported | RTW Convertible Notes
Other comprehensive loss:
Change in fair value due to change in credit risk	(80)				(80)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Income (loss)	(6,160)				(9,750)
Other comprehensive loss:
Comprehensive Income (loss)					810
Adjustment | Revenue Interest Financing
Other comprehensive loss:
Change in fair value due to change in credit risk	6,000				10,400
Adjustment | RTW Convertible Notes
Other comprehensive loss:
Change in fair value due to change in credit risk	$ 160				$ 160

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Restatement of Previously Issued Condensed Consolidated Financial Statements - Restated Condensed Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating Activities:
Net income (loss)			$ (6,326)	$ (39,797)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash lease expense			362	416
Depreciation and amortization	$ 197	$ 154	564	399
Stock-based compensation			1,357	810
Unrealized exchange (gain) or loss			373	49
Provision for inventory			369	469
Change in fair value of warrant liabilities			(4,507)	1,679
Change in fair value of derivative liabilities			(1,895)	35
Change in fair value of Revenue Interest Financing and PIPE Conversion Option	5,994		8,094
Change in fair value of earn-out liabilities	(5,690)		(19,880)
Interest paid on debt recorded at fair value			(1,054)
Change in fair value of debt			(8,070)	(2,257)
Debt issuance costs associated with debt recorded at fair value			1,357
Non-cash interest expense			1,464	775
Loss on term loan extinguishment	8,713		8,713	0
Changes in operating assets and liabilities:
Accounts receivable			4,412	930
Inventory			1,014	(1,468)
Prepaid expenses, other current and long-term assets			718	634
Lease liabilities			(411)	(391)
Accounts payable			(2,504)	5,021
Accrued expenses and other current liabilities			(1,713)	3,162
Net cash used in operating activities			(17,563)	(20,017)
Investing Activities:
Purchases of property and equipment			(539)	(408)
Net cash used in investing activities			(539)	(408)
Financing Activities:
Proceeds from issuance of convertible notes			48,000	19,550
Proceeds from option and warrant exercises			26	61
Proceeds from equity line financing			378
Payment of debt issuance costs			(1,357)
Repayment of Fortress term loan			(47,720)
Net cash provided by (used in) financing activities			(673)	17,507
Net increase (decrease) in cash and cash equivalents and restricted cash			(18,775)	(2,918)
Cash and cash equivalents and restricted cash at beginning of period			38,421	8,023
Cash and cash equivalents and restricted cash at end of period	19,646	$ 5,105	19,646	5,105
Supplemental disclosure of cash flow information
Cash paid for interest			2,672	3,967
Supplemental cash flow information on non-cash investing and financing activities
Purchase of property and equipment included in accounts payable			31	165
Deferred financing costs in accounts payable and accrued expenses			1,207	$ 6,918
Change in fair value of RTW Convertible Notes through OCI			80
Change in fair value of Revenue Interest Financing through OCI			5,200
As Reported
Operating Activities:
Net income (loss)			3,424
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Non-cash lease expense			362
Depreciation and amortization			564
Stock-based compensation			1,357
Unrealized exchange (gain) or loss			373
Provision for inventory			369
Change in fair value of warrant liabilities			(4,507)
Change in fair value of derivative liabilities			(1,895)
Change in fair value of Revenue Interest Financing and PIPE Conversion Option	(6)		(1,496)
Change in fair value of earn-out liabilities	(5,690)		(19,880)
Interest paid on debt recorded at fair value			(1,054)
Change in fair value of debt			(8,230)
Debt issuance costs associated with debt recorded at fair value			1,357
Non-cash interest expense			1,464
Loss on term loan extinguishment	8,713		8,713
Changes in operating assets and liabilities:
Accounts receivable			4,412
Inventory			1,014
Prepaid expenses, other current and long-term assets			718
Lease liabilities			(411)
Accounts payable			(2,504)
Accrued expenses and other current liabilities			(1,713)
Net cash used in operating activities			(17,563)
Investing Activities:
Purchases of property and equipment			(539)
Net cash used in investing activities			(539)
Financing Activities:
Proceeds from issuance of convertible notes			48,000
Proceeds from option and warrant exercises			26
Proceeds from equity line financing			378
Payment of debt issuance costs			(1,357)
Repayment of Fortress term loan			(47,720)
Net cash provided by (used in) financing activities			(673)
Net increase (decrease) in cash and cash equivalents and restricted cash			(18,775)
Cash and cash equivalents and restricted cash at beginning of period			38,421
Cash and cash equivalents and restricted cash at end of period	19,646		19,646
Supplemental disclosure of cash flow information
Cash paid for interest			2,672
Supplemental cash flow information on non-cash investing and financing activities
Purchase of property and equipment included in accounts payable			31
Deferred financing costs in accounts payable and accrued expenses			1,207
Change in fair value of Revenue Interest Financing through OCI			(5,280)
Adjustment
Operating Activities:
Net income (loss)			(9,750)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Change in fair value of Revenue Interest Financing and PIPE Conversion Option	$ 6,000		9,590
Change in fair value of debt			160
Supplemental cash flow information on non-cash investing and financing activities
Change in fair value of RTW Convertible Notes through OCI			80
Change in fair value of Revenue Interest Financing through OCI			$ 10,480

XML

Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
ASU 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accounting principle accounting standards update adopted	true		true
Change in accounting principle accounting standards update adoption date	Jan. 01, 2024		Jan. 01, 2024
Change in accounting principle accounting standards update immaterial effect	true		true
ASU 2023-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accounting principle accounting standards update adopted	true		true
Change in accounting principle accounting standards update adoption date	Jan. 01, 2024		Jan. 01, 2024
Total Revenue | Customer Concentration Risk | Customers
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%
Accounts Receivable | Customer Concentration Risk | Customers
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage			10.00%		10.00%

XML

Summary of Significant Accounting Policies - Summary of Risk of Concentration of Credit, Significant Customers (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Accounts Receivable | Customer Concentration Risk | Customer A
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%	16.00%

XML

Business Combination - Additional Information (Details)		3 Months Ended
	Aug. 01, 2023 USD ($) $ / shares shares	Mar. 31, 2024 shares	Jun. 30, 2023 shares	Mar. 31, 2023 shares	Jun. 30, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Feb. 09, 2023 USD ($)
Business Acquisition [Line Items]
Warrants outstanding					16,151
Warrants converted into warrants exercisable					16,151	16,151
Outstanding public warrants to purchase	750,394
Transaction costs | $	$ 22,700,000
Additional paid-in capital | $	15,200,000				$ 144,771,000	$ 143,010,000
Business combination one-time insurance payment | $	3,600,000
Public warrant liabilities | $					2,113,000	5,943,000
Earn-out liabilities | $	53,000,000				4,110,000	$ 23,990,000
General and Administrative
Business Acquisition [Line Items]
Business combination expense | $	5,000,000
Fortress Term Loan
Business Acquisition [Line Items]
Issuance costs | $	$ 2,500,000
Public Warrants
Business Acquisition [Line Items]
Warrants outstanding	13,206,922
Public warrant liabilities | $	$ 13,800,000
Convertible Notes
Business Acquisition [Line Items]
Aggregate recognition APIC amount | $	25,600,000
Business Combination Agreement
Business Acquisition [Line Items]
Sponsor loan excess amount | $	3,700,000
Revenue Interest Financing Agreement
Business Acquisition [Line Items]
Proceeds from revenue interest financing | $	40,000,000
Direct costs and fees | $	1,200,000
Issuance costs | $	$ 1,200,000
Revenue Interest Financing Agreement | Maximum
Business Acquisition [Line Items]
Percentage of annual net sales							6.00%
Remittance of revenue interest payments percentage							10.00%
Conversion of PIPE investment to revenue interest finance | $					$ 7,500,000		$ 7,500,000
Revenue Interest Financing Agreement | New Allurion | Maximum
Business Acquisition [Line Items]
Percentage of annual net sales							6.00%
Remittance of revenue interest payments percentage							10.00%
Fortress Credit Agreement
Business Acquisition [Line Items]
Shares issued	38,000
Fortress Credit Agreement | Term Loan Facility
Business Acquisition [Line Items]
Term loan borrowed | $	$ 60,000,000
Backstop Agreement
Business Acquisition [Line Items]
Aggregate principal amount | $	$ 2,000,000
Shares issued upon conversion of convertible notes	28,000
RSU Forfeiture Agreement
Business Acquisition [Line Items]
Number of shares forfeited	3,170
PIPE Subscription Agreements
Business Acquisition [Line Items]
Aggregate purchase of shares	215,468
Purchase price per share | $ / shares	$ 176
Aggregate purchase price | $	$ 37,900,000
Common Stock
Business Acquisition [Line Items]
Shares issued		5,730
Outstanding public warrants to purchase			20	143
Common Stock | Convertible Notes
Business Acquisition [Line Items]
Accured interest | $	$ 21,800,000
Shares issued upon conversion of convertible notes	132,049
Common Stock | Business Combination Agreement
Business Acquisition [Line Items]
Exchange ratio	0.978
Conversion of shares	21,023
Sale of stock | $ / shares	$ 202.5
Common Stock | Business Combination Agreement | Warrant Amendment
Business Acquisition [Line Items]
Sale of stock | $ / shares	$ 202.5
Common Stock | RTW Side Letter
Business Acquisition [Line Items]
Shares issued	10,000
Common Stock | Backstop Agreement
Business Acquisition [Line Items]
Shares issued	28,000
Common Stock | HVL Termination Agreement
Business Acquisition [Line Items]
Shares issued	15,508
Common Stock | Gaur Contribution Agreement
Business Acquisition [Line Items]
Contribution of capital	3,170
Class A Common Stock | Business Combination Agreement
Business Acquisition [Line Items]
Conversion of shares	0.056818
Class A Common Stock | Sponsor Contribution Agreement
Business Acquisition [Line Items]
Contribution of capital	161,379
Class A Common Stock | Sponsor Support Agreement
Business Acquisition [Line Items]
Conversion of shares	1.420455
Class A Common Stock | Sponsor Support Agreement | CPUH Stockholders
Business Acquisition [Line Items]
Warrants outstanding	12,833,333
Warrants converted into warrants exercisable	2,088,327
Shares issued upon conversion	21,120
Class B Common Stock | Sponsor Support Agreement | CPUH Stockholders
Business Acquisition [Line Items]
Recapitalization of common stock	21,442,500
Recapitalization of additional shares	30,000

XML

Business Combination - Reconciles of Business Combination to Condensed Consolidated Statement (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Business Acquisition [Line Items]
Gross Proceeds	$ 76,317
Less: transaction costs paid	(14,665)
Net proceeds from the Business Combination	61,652
Less: warrant liabilities assumed	(13,762)
Less: repayment of note assumed in the Business Combination	(2,500)
Less: accrued transaction costs at December 31, 2023	(580)
Reverse merger, net of transaction costs	44,810
Cash - CPUH trust
Business Acquisition [Line Items]
Gross Proceeds	38,395
Cash - PIPE Investors
Business Acquisition [Line Items]
Gross Proceeds	$ 37,922

XML

Business Combination - Number of Shares of Allurion Common Stock Outstanding (Details) - shares	Jun. 30, 2024	Dec. 31, 2023	Aug. 01, 2023
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination	1,918,927	1,907,529	1,892,058
Legacy Allurion Equityholders
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination			1,115,896
CPUH Stockholders
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination			206,628
Shares Issued to PIPE Investors
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination			215,468
Shares issued to RTW and Fortress
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination			76,000
Shares Issued to Convertible Note Holders
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination			132,049
CPUH Sponsor Shares
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination			130,509
Side Letter Termination Shares
Business Acquisition [Line Items]
Total shares of Common Stock immediately after Business Combination			15,508

XML

Revenue - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) Country	Jun. 30, 2023 USD ($) Country	Jun. 30, 2024 USD ($) Country	Jun. 30, 2023 USD ($) Country
Disaggregation of Revenue [Line Items]
Revenue | $	$ 3,600	$ 4,400	$ 5,400	$ 7,700
Number of countries generate revenue | Country	5	5	5	5
United States
Disaggregation of Revenue [Line Items]
Revenue | $	$ 0		$ 0
Each Country | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | Minimum
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	4.00%	4.00%	3.00%	4.00%
Each Country | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | Maximum
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	8.00%	9.00%	8.00%	8.00%
All Other Countries
Disaggregation of Revenue [Line Items]
Number of countries generate revenue by sales | Country	40	40	45	48
Four Countries Included Within All Other Countries | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	31.00%	35.00%	26.00%	29.00%

XML

Revenue - Schedule of Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 11,766	$ 12,960	$ 21,152	$ 27,031
France
Disaggregation of Revenue [Line Items]
Revenue	1,866	1,258	3,536	3,113
Spain
Disaggregation of Revenue [Line Items]
Revenue	1,450	896	2,562	2,520
United Kingdom
Disaggregation of Revenue [Line Items]
Revenue			2,173	2,257
All Other Countries
Disaggregation of Revenue [Line Items]
Revenue	$ 8,450	$ 10,806	$ 12,881	$ 19,141

XML

Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Inventory, Gross [Abstract]
Finished goods	$ 2,760	$ 3,427
Work in progress	767	967
Raw materials	1,261	1,777
Total Inventory	$ 4,788	$ 6,171

XML

Inventory - Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Inventory [Line Items]
Provision for excess and obsolete inventory	$ 0.3
Maximum
Inventory [Line Items]
Provision for excess and obsolete inventory		$ 0.1

XML

Property and Equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment at cost	$ 5,924	$ 5,745
Less: accumulated depreciation and amortization	(3,984)	(3,559)
Construction in progress	1,314	1,195
Property and equipment net	$ 3,254	3,381
Computers and purchased software
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Property and equipment at cost	$ 618	618
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment at cost	$ 1,943	1,943
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Property and equipment at cost	$ 291	291
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment at cost	$ 3,072	$ 2,893
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years

XML

Property and Equipment, net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 0.2	$ 0.2	$ 0.6	$ 0.4

XML

Property and Equipment, net - Schedule of Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 197	$ 154	$ 564	$ 399
Cost of Revenue
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	112	59	314	218
Research and Development
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	50	46	99	83
General and Administrative
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	21	35	84	70
Sales and Marketing
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 14	$ 14	$ 67	$ 28

XML

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Marketing reimbursement	$ 1,620	$ 2,834
Accrued compensation	2,921	1,687
Accrued clinical trials and R&D	3,831	3,694
Accrued selling and marketing	678	1,110
Accrued professional fees	1,292	1,505
Accrued warranty	25	44
Accrued restructuring		655
Other accrued expenses	4,357	3,966
Total accrued expenses and other current liabilities	$ 14,724	$ 15,495

XML

Accrued Expenses and Other Current Liabilities - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Payments for restructuring		$ 700,000
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 100,000	$ 100,000
Payments for restructuring	$ 100,000

XML

Debt - Summary of Components of Third-Party Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total principal amount of debt	$ 48,000	$ 43,100
Plus: Accretion		148
Change in fair value	(7,050)
Less: current portion of long-term debt, net of discounts		(38,643)
Less: unamortized deferred financing costs and debt discounts		(4,605)
Long-term debt, net of current portion and discounts	40,950
RTW Convertible Notes
Debt Instrument [Line Items]
Total principal amount of debt	$ 48,000
Fortress Term Loan
Debt Instrument [Line Items]
Total principal amount of debt		$ 43,100

XML

Debt - Additional Information (Details)					1 Months Ended			3 Months Ended		4 Months Ended	6 Months Ended		7 Months Ended
	Apr. 16, 2024 USD ($)	Apr. 14, 2024 USD ($) $ / shares	Aug. 01, 2023 USD ($) $ / shares shares	May 02, 2023 USD ($)	Aug. 31, 2023	Jan. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Apr. 16, 2024 USD ($)	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Aug. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 29, 2023 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2021 USD ($)
Debt Instrument [Line Items]
Warrants converted into warrants exercisable | shares								16,151			16,151				16,151
Loss on term loan extinguishment								$ 8,713,000			$ 8,713,000	$ 0
Proceeds from issuance of convertible notes											$ 48,000,000	19,550,000
Common stock, par value | $ / shares								$ 0.0001			$ 0.0001				$ 0.0001
Repayment of convertible debt												500,000
Principal balance								$ 48,000,000			$ 48,000,000				$ 43,100,000
Other income (expense), net								999,000	$ (91,000)		1,171,000	(255,000)
Gain in fair value of revenue interest financing								3,000,000			5,200,000
Change in fair value of revenue interest financing								8,100,000			9,100,000
General and administrative expense								7,311,000	6,408,000		13,697,000	11,714,000
Backstop Agreement
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes			$ 2,000,000
Shares issued upon conversion of outstanding notes | shares			28,000
RTW Convertible Notes
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes											49,100,000
Principal balance								48,000,000			48,000,000
Issuance costs								1,400,000			1,400,000
Other income (expense), net											1,100,000
Gain in fair value of revenue interest financing								8,000,000
Change in fair value of revenue interest financing											$ 100,000
Note Purchase Agreement | Maximum
Debt Instrument [Line Items]
Unrestricted cash		$ 12,500,000
Note Purchase Agreement | RTW Convertible Notes
Debt Instrument [Line Items]
Interest rate		6.00%
Debt instrument maturity date		Apr. 16, 2031
Principal amount		$ 48,000,000
Note Purchase Agreement | RTW Convertible Notes | Common Stock
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes		$ 15,000,000
Initial conversion rate		24.692
Debt instrument, principal amount for conversion into common stock		$ 1,000
Initial conversion price per share | $ / shares		$ 40.5
Premium percentage of stock price trigger		35.00%
Maximum percentage of number of shares of common stock outstanding		1.00%
Fortress Credit Agreement
Debt Instrument [Line Items]
Interest, frequency of payment											The Fortress Term Loan had a maturity date of June 30, 2027 and accrued 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 was payable in arrears on a monthly basis. The Fortress Term Loan provided for an exit payment equal to 3.0% of the Fortress Term Loan (the "Exit Fee") due upon prepayment or the maturity date of the Fortress Term Loan, in addition to any early prepayment fee.
2021 Convertible Notes
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes							$ 2,000,000
Interest rate							5.00%
Debt instrument, term							36 months
Unamortized debt issuance costs							$ 0
Conversion divided by capped conversion price							600,000,000
2021 Convertible Notes | Common Stock
Debt Instrument [Line Items]
Shares issued upon conversion of outstanding notes | shares			5,345
Aggregate recognition APIC amount			$ 2,200,000
2021 Convertible Notes | Maximum
Debt Instrument [Line Items]
Interest expense									100,000			100,000
2022 Convertible Notes
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes						$ 1,100,000
Interest rate						5.00%
Debt instrument, term						36 months
2022 Convertible Notes | Common Stock
Debt Instrument [Line Items]
Shares issued upon conversion of outstanding notes | shares			3,329
Aggregate recognition APIC amount			$ 1,200,000
2022 Convertible Notes | Maximum
Debt Instrument [Line Items]
Interest expense									100,000			100,000
2023 Convertible Notes
Debt Instrument [Line Items]
Repayment of principal			500,000
Interest expense									300,000			400,000
Proceeds from issuance of convertible notes													$ 28,700,000
Interest rate					7.00%								7.00%
Debt instrument maturity date													Dec. 31, 2026
Conversion divided by discounted capped conversion price													$ 217,300,000
Capped price													$ 260,000,000
Percentage of conversion discounted price is calculated of cash price													85.00%
Repayment of convertible debt			2,000,000
Debt prepayment penalty			$ 1,500,000
Initial conversion price per share | $ / shares			$ 176
2023 Convertible Notes | Common Stock
Debt Instrument [Line Items]
Shares issued upon conversion of outstanding notes | shares			123,376
Aggregate recognition APIC amount			$ 22,200,000
Side Letter Holder Bridge Note
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes			$ 2,700,000
Shares issued upon conversion of outstanding notes | shares			15,508
Repayment of convertible debt			$ 6,300,000
Debt instrument, convertible price for calculating equity securities			125
Deferred liability for issuance of additional shares				$ 3,400,000
Principal balance			6,300,000
Aggregate recognition APIC amount			$ 2,700,000
Side Letter Holder Bridge Note | Common Stock
Debt Instrument [Line Items]
Shares issued upon conversion of outstanding notes | shares			12,000
Side Letter Holder Bridge Note | Minimum
Debt Instrument [Line Items]
Repayment of convertible debt			$ 6,000,000
Side Letter Holder Bridge Note | Backstop Agreement
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes			2,000,000
Deferred liability for issuance of additional shares				3,300,000
Side Letter Holder Bridge Note | Backstop Agreement | Maximum
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes				$ 2,000,000
2021 Term Loan
Debt Instrument [Line Items]
Interest expense									2,200,000			4,300,000
Contractual interest									2,000,000			4,000,000
Amortization of the debt discount												100,000
Amortization of the warrant									100,000			100,000
Accretion									100,000			$ 100,000
2021 Term Loan | Maximum
Debt Instrument [Line Items]
Amortization of the debt discount									$ 100,000
2021 Term Loan | 2021 Term Loan Agreement | Runway
Debt Instrument [Line Items]
Term loan borrowed																		$ 25,000,000
Total payoff amount			58,000,000
Repayment of principal			55,000,000
Prepayment fee			1,100,000
Final payment fee			$ 1,600,000
Prepayment fee percentage			2.00%
Final payment fee percentage			3.00%
Original final payment			$ 100,000
Loss on term loan extinguishment			$ 3,900,000
2021 Term Loan | Amended 2021 Term Loan Agreement | Runway
Debt Instrument [Line Items]
Additional borrowings														$ 30,000,000
Term C Loan | Amended 2021 Term Loan Agreement | Runway
Debt Instrument [Line Items]
Additional borrowings							$ 20,000,000
Maturity Date							Dec. 30, 2025
Fair value of the warrants								300,000			$ 300,000				300,000
Term C Loan | Amended 2021 Term Loan Agreement | Runway | Legacy Allurion Series C Preferred Stock
Debt Instrument [Line Items]
Warrants exercisable | shares							132,979
Term C Loan | Amended 2021 Term Loan Agreement | Runway | Common Stock
Debt Instrument [Line Items]
Warrants converted into warrants exercisable | shares			5,203
Term C Loan | Amended 2021 Term Loan Agreement | Runway | Series D-1 Preferred Stock
Debt Instrument [Line Items]
Warrants exercisable | shares														88,440
Term D Loan | Amended 2021 Term Loan Agreement | Runway
Debt Instrument [Line Items]
Fair value of the warrants								800,000			800,000				800,000
Term D Loan | Amended 2021 Term Loan Agreement | Runway | Common Stock
Debt Instrument [Line Items]
Warrants converted into warrants exercisable | shares			3,620
Term D Loan | Amended 2021 Term Loan Agreement | Runway | Series D-1 Preferred Stock
Debt Instrument [Line Items]
Warrants converted into warrants exercisable | shares			88,440
Term D Loan | Amended 2021 Term Loan Agreement | Runway | Maximum
Debt Instrument [Line Items]
Additional borrowings																	$ 15,000,000
Fortress Term Loan
Debt Instrument [Line Items]
Loss on term loan extinguishment								8,700,000			8,700,000
Principal balance															$ 43,100,000
Issuance costs			$ 2,500,000
Fortress Term Loan | Note Purchase Agreement
Debt Instrument [Line Items]
Total payoff amount	$ 48,000,000
Repayment of principal	43,100,000
Prepayment fee	2,700,000
Exit fee	1,300,000
Other fees	600,000
Accrued interest	$ 300,000									$ 300,000
Fortress Term Loan | Fortress Credit Agreement
Debt Instrument [Line Items]
Initial cash proceeds			$ 60,000,000
Interest rate					6.44%					14.94%
Basis spread on variable rate			3.00%
Debt instrument exit payment percentage			3.00%
Interest expense								300,000			2,300,000
Contractual interest								300,000			1,900,000
Amortization of the debt discount											300,000
Accretion											$ 100,000
Debt instrument maturity date											Jun. 30, 2027
Minimum Liquidity Amount																$ 12,500,000
Issuance costs			$ 2,500,000
Default interest rate			3.00%
Fair value of term loan derivative liability								0			$ 0
Gain recorded on derivative											$ 2,000,000
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]											Other income (expense), net
Fortress Term Loan | Fortress Credit Agreement | Maximum
Debt Instrument [Line Items]
Amortization of the debt discount								$ 100,000
Fortress Term Loan | Side Letter Holder Bridge Note | Backstop Agreement | Common Stock
Debt Instrument [Line Items]
Shares issued upon conversion of outstanding notes | shares			38,000
Aggregate recognition APIC amount			$ 13,400,000
Fortress Term Loan | Fortress Amendment
Debt Instrument [Line Items]
Unamortized debt issuance costs																800,000
Principal amount																20,000,000
Debt fee amount incurred																3,100,000
Fortress Term Loan | Fortress Amendment | Until March 31, 2024
Debt Instrument [Line Items]
Minimum Liquidity Amount																33,500,000
Fortress Term Loan | Fortress Amendment | From April 1, 2024 to June 30, 2024
Debt Instrument [Line Items]
Minimum Liquidity Amount																23,500,000
Fortress Term Loan | Fortress Amendment | From July 1, 2024 to September 30, 2024
Debt Instrument [Line Items]
Minimum Liquidity Amount																16,900,000
Fortress Term Loan | Fortress Amendment | On October 1, 2024 and thereafter
Debt Instrument [Line Items]
Minimum Liquidity Amount																12,500,000
Fortress Term Loan | Fortress Amendment | Maximum | Common Stock
Debt Instrument [Line Items]
Principal balance																$ 20,000,000

XML

Debt - Schedule of Future Maturities of the Term Loan Facility (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total principal amount of debt	$ 48,000	$ 43,100
Fortress Term Loan
Debt Instrument [Line Items]
Total principal amount of debt		$ 43,100

XML

Revenue Interest Financing, Side Letter, and PIPE Conversion Option - Additional Information (Details) $ / shares in Units, $ in Thousands						3 Months Ended				6 Months Ended
	Jan. 02, 2027	Jan. 01, 2027 USD ($)	Dec. 31, 2026	Dec. 30, 2026 USD ($)	Feb. 09, 2023 USD ($) Days $ / shares	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2026	Apr. 17, 2024 USD ($)	Apr. 16, 2024 USD ($)	Aug. 01, 2023 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Net Income (Loss)						$ (8,322)	$ 1,996	$ (21,996)	$ (17,801)	$ (6,326)	$ (39,797)
Gain in fair value of revenue interest financing						3,000				5,200
Change in fair value of revenue interest financing						8,100				9,100
Revenue Interest Financing Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenues interest financing liability															$ 40,000
Pre payments percentage					165.00%
Issuance costs															1,200
Royalty payments						2,100				2,100
Stock price | $ / shares					$ 250
Revenue Interest Financing Agreement | December 31, 2027
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Cash payments percentage					100.00%
Revenue Interest Financing Agreement | Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Percentage of annual net sales					6.00%
Remittance of revenue interest payments percentage					10.00%
Revenue interest payments percentage					260.00%
Volume weighted average price per share | $ / shares					$ 176
Conversion of PIPE investment to revenue interest finance					$ 7,500	7,500				7,500
Trading days | Days					30
Revenue Interest Financing Agreement | Maximum | December 31, 2030
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Cash payments percentage					240.00%
Revenue Interest Financing Agreement | Minimum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue interest payments percentage					100.00%
Trading days | Days					20
Revenue Interest Financing Agreement | Minimum | December 31, 2030
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue interest payments percentage					240.00%
Revenue Interest Financing Agreement | PIPE Conversion Option
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Issue-date estimated fair value															$ 3,300
RIFA Amendment
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue Interest Financing Agreement Remeasured Value						39,000				39,000			$ 39,000	$ 33,000
PIPE Conversion Option Remeasured Value						$ 5,500				$ 5,500			$ 4,600	$ 6,600
RIFA Amendment | Forecast
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Percentage of net sales			12.00%	6.00%
Percentage of Increase in Net Sales	12.00%	10.00%
Percentage of Internal Rate of Return												20.00%
RIFA Amendment | Maximum | Forecast
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales Revenue Net				$ 100,000
Increase in Sales Revenue Net		$ 100,000

XML

Fair Value Measurements - Schedule of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value at Issuance Date and on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 13,304	$ 30,582
Total Liabilities	2,113	5,943
Level 1 | Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	2,113	5,943
Level 1 | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	13,304	30,582
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	89,669	69,330
Level 3 | Legacy Allurion Common Stock Warrant Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	145	821
Level 3 | Revenue Interest Financing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	39,000	36,200
Level 3 | PIPE Conversion Option
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	5,450
Level 3 | PIPE Conversion Option (Restated)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities		6,410
Level 3 | Earn-out Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	4,110	23,990
Level 3 | RTW Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	40,950
Level 3 | Term Loan Derivative Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities		1,895
Level 3 | Success Fee Derivative Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	14	14
Total Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	13,304	30,582
Total Liabilities	91,782	75,273
Total Carrying Value | Legacy Allurion Common Stock Warrant Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	145	821
Total Carrying Value | Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	2,113	5,943
Total Carrying Value | Revenue Interest Financing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	39,000	36,200
Total Carrying Value | PIPE Conversion Option
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	5,450
Total Carrying Value | PIPE Conversion Option (Restated)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities		6,410
Total Carrying Value | Earn-out Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	4,110	23,990
Total Carrying Value | RTW Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	40,950
Total Carrying Value | Term Loan Derivative Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities		1,895
Total Carrying Value | Success Fee Derivative Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	14	14
Total Carrying Value | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 13,304	$ 30,582

XML

Fair Value Measurements - Schedule of Assumptions used in Pricing Model (Details) - Black-Scholes Option Pricing Model - Level 3	Jun. 30, 2024	Dec. 31, 2023
Interest Rate | Other Common Stock
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	0.045	0.0395
Interest Rate | Legacy Allurion Series C Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	0.0433	0.0388
Interest Rate | Legacy Allurion Series D-1 Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input		0.0388
Interest Rate | Legacy Allurion Series D-1 Preferred Stock Warrants | Minimum
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	0.0433
Interest Rate | Legacy Allurion Series D-1 Preferred Stock Warrants | Maximum
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	0.0434
Exercise Price | Other Common Stock
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	26.25	26.25
Exercise Price | Legacy Allurion Series C Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	168.25	168.25
Exercise Price | Legacy Allurion Series D-1 Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	303.5	303.5
Estimated Fair Value of Underlying Share Price | Other Common Stock
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	25	93.5
Estimated Fair Value of Underlying Share Price | Legacy Allurion Series C Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	25	93.5
Estimated Fair Value of Underlying Share Price | Legacy Allurion Series D-1 Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	25	93.5
Expected Volatility | Other Common Stock
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	0.90	1
Expected Volatility | Legacy Allurion Series C Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	0.90	1
Expected Volatility | Legacy Allurion Series D-1 Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants measurement input	0.90	1
Expected Life (Years) | Other Common Stock
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants term	3 years 2 months 8 days	3 years 8 months 8 days
Expected Life (Years) | Legacy Allurion Series C Preferred Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants term	6 years 9 months	7 years 3 months
Expected Life (Years) | Legacy Allurion Series D-1 Preferred Stock Warrants | Minimum
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants term	6 years 9 months	7 years 3 months
Expected Life (Years) | Legacy Allurion Series D-1 Preferred Stock Warrants | Maximum
Fair Value, Assets Measured on Recurring Basis, Observable and Unobservable Input Reconciliation [Line Items]
Warrants term	8 years 2 months 15 days	8 years 8 months 15 days

XML

Fair Value Measurements - Additional Information (Details)	6 Months Ended
	Jun. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 $ / shares	Aug. 01, 2023 $ / shares	Jun. 30, 2023
Public Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock price	$ 0.16
Expected Dividend Yield | Level 3 | Black-Scholes Option Pricing Model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants measurement input	0			0
2019 Term Loan and Success Fee
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions of liquidity event term	4 years
2023 Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated share price at conversion			$ 176
Revenue Interest Financing and PIPE Conversion Option
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of estimated number of shares | shares	42,614
Stock price	$ 25	$ 93.5
Revenue Interest Financing and PIPE Conversion Option | Estimated Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, measurement input	30.1	24.4
RTW Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock price	$ 25
Principal amount | $	$ 48,000,000

XML

Fair Value Measurements - Schedule of Changes in Fair Values (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 304	$ 3,830	$ 821	$ 2,373
Change in fair value	$ (159)	$ 204	$ (676)	$ 1,679
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Fair Value Adjustment of Warrants	Fair Value Adjustment of Warrants	Fair Value Adjustment of Warrants	Fair Value Adjustment of Warrants
Exercise of warrants		$ (4)		$ (22)
Ending Balance	$ 145	4,030	$ 145	4,030
Preferred Stock Warrants (as Converted to Common)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	233	2,585	642	1,777
Change in fair value	(123)	98	(532)	924
Exercise of warrants		(4)		(22)
Ending Balance	110	2,679	110	2,679
Common Stock Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	71	1,245	179	596
Change in fair value	(36)	106	(144)	755
Ending Balance	35	1,351	35	1,351
Public Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	54,281	13,807	68,509	178
Fair value upon issuance	49,100	12,584	49,100	26,184
Change in fair value	(9,723)	(2,253)	(21,751)	(2,224)
Change in fair value - OCI	(3,080)		(5,280)
Repayments of debt	(1,054)	(500)	(1,054)	(500)
Ending Balance	89,524	23,638	89,524	23,638
Public Warrants | Success Fee Derivative Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	14	207	14	178
Change in fair value		6		35
Ending Balance	14	213	14	213
Public Warrants | 2023 Convertible Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		13,600
Fair value upon issuance		5,950		19,550
Change in fair value		(2,257)		(2,257)
Repayments of debt		(500)		(500)
Ending Balance		16,793		16,793
Public Warrants | Term Loan Derivative Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,957		1,895
Change in fair value	(1,957)		(1,895)
Public Warrants | PubCo Share Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value upon issuance		3,370		3,370
Change in fair value		(43)		(43)
Ending Balance		3,327		3,327
Public Warrants | Base PubCo & Backstop Share Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value upon issuance		3,264		3,264
Change in fair value		41		41
Ending Balance		$ 3,305		$ 3,305
Public Warrants | Revenue Interest Financing
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	35,000		36,200
Change in fair value	8,054		9,054
Change in fair value - OCI	(3,000)		(5,200)
Repayments of debt	(1,054)		(1,054)
Ending Balance	39,000		39,000
Public Warrants | PIPE Conversion Derivative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	7,510		6,410
Change in fair value	(2,060)		(960)
Ending Balance	5,450		5,450
Public Warrants | Earn-Out Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	9,800		23,990
Change in fair value	(5,690)		(19,880)
Ending Balance	4,110		4,110
Public Warrants | RTW Convertible Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value upon issuance	49,100		49,100
Change in fair value	(8,070)		(8,070)
Change in fair value - OCI	(80)		(80)
Ending Balance	$ 40,950		$ 40,950

XML

Fair Value Measurements - Schedule of Estimated Fair Value was Measured Using a Monte Carlo Simulation Method (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Risk-free interest rate	4.36%
Expected term (in years)	6 years 1 month 6 days
Expected volatility	71.00%
Revenue Interest Financing and PIPE Conversion Option
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock price	$ 25	$ 93.5
Risk-free interest rate	5.06%	4.46%
Expected term (in years)	1 year 1 month 6 days	1 year 7 months 6 days
Expected volatility	110.00%	82.50%
Earn-Out Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock price	$ 25	$ 93.5
Risk-free interest rate	4.40%	3.90%
Expected term (in years)	4 years 1 month 6 days	4 years 7 months 6 days
Expected volatility	103.00%	87.00%
RTW Convertible Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock price	$ 25
Risk-free interest rate	4.30%
Expected term (in years)	6 years 9 months 18 days
Expected volatility	80.00%

XML

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 65,000	$ 22,000	$ 141,000	$ 56,000
Effective tax rates	(0.80%)	(0.10%)	(2.30%)	(0.10%)
Uncertain tax positions	$ 0	$ 0	$ 0	$ 0
Maximum
Operating Loss Carryforwards [Line Items]
Income tax expense		$ 100,000		$ 100,000

XML

Capital Stock and Stockholders' Deficit - Additional Information (Details) - USD ($)						3 Months Ended			6 Months Ended
	Jul. 05, 2024	Jul. 01, 2024	Jun. 28, 2024	Dec. 18, 2023	Aug. 01, 2023	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Preferred stock, shares authorized									100,000,000	100,000,000
Preferred stock, shares outstanding									0	0
Number of shares authorized									1,000,000,000	1,000,000,000
Par value common stock									$ 0.0001	$ 0.0001
Number of shares outstanding					1,892,058				1,918,927	1,907,529
Warrant liabilities									$ 2,113,000	$ 5,943,000
Warrants outstanding									16,151
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants (in shares)					750,394
Warrants exercisable price									$ 202.5
Gross proceeds from offering									$ 378,000
Stock issued during period value						$ 378,000
Additional paid-in capital					$ 15,200,000				$ 144,771,000	$ 143,010,000
ChEF Purchase Agreement | Chardan Equity Facility
Class of Stock [Line Items]
Number of shares sold per unit									5,730
Amount received on shares sold per unit									$ 400,000
Stock issued during period value				$ 100,000,000
Additional paid-in capital				100,000
Expense of issuance of commitment shares				100,000
Structuring fee payable				$ 100,000
Common Stock
Class of Stock [Line Items]
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants (in shares)							20	143
Common Stock | Subsequent Events
Class of Stock [Line Items]
Warrants exercisable price	$ 30
Common Stock | ChEF Purchase Agreement | Chardan Equity Facility
Class of Stock [Line Items]
Number of shares outstanding				379,299
Percentage of common stock, shares, outstanding				19.99%
Commitment Shares | ChEF Purchase Agreement | Chardan Equity Facility
Class of Stock [Line Items]
Stock issued during period value				$ 1,421
Public Warrant
Class of Stock [Line Items]
Warrant liabilities									$ 13,206,720
Issuance of Legacy Allurion convertible preferred stock for the exercise of warrants (in shares)									750,383
Public Warrant | Scenario Plan Three
Class of Stock [Line Items]
Stock price									$ 316.75
Warrants redumption price per share									0.25
Public Warrant | Scenario Plan Four
Class of Stock [Line Items]
Stock price									176
Warrants redumption price per share									2.5
Public Offering
Class of Stock [Line Items]
Sale of stock			$ 30
Number of shares sold per unit			576,261
Public Offering | Subsequent Events
Class of Stock [Line Items]
Number of shares sold per unit	77,091
Gross proceeds from offering		$ 17,300,000
Concurrent Private Placement | Subsequent Events
Class of Stock [Line Items]
Gross proceeds from offering		$ 2,700,000
Underwriters
Class of Stock [Line Items]
Number of shares sold per unit			86,440
Underwriters | Subsequent Events
Class of Stock [Line Items]
Gross proceeds from offering	$ 2,300,000
Compute Health
Class of Stock [Line Items]
Sale of stock									$ 10
Compute Health | Public Warrant
Class of Stock [Line Items]
Number of shares sold per unit									0.5
Compute Health | IPO
Class of Stock [Line Items]
Class of Warrant Exchanged									0.6125
Number of shares sold per unit									1
Class A Common Stock
Class of Stock [Line Items]
Par value common stock									$ 0.0001
Number of shares sold per unit									1
Class A Common Stock | Compute Health | IPO
Class of Stock [Line Items]
Shares issuable for each outstanding warrants exercised									0.056818
Sale of stock									$ 11.5

XML

Capital Stock and Stockholders' Deficit - Summary of Reserved for Issuance Upon the Potential Conversion or Exercise (Details)	Jun. 30, 2024 shares
Class of Stock [Line Items]
Common stock shares reserved for future issuance	1,457,612
Restricted Stock Units
Class of Stock [Line Items]
Common stock shares reserved for future issuance	23,738
Outstanding Options to Purchase Common Stock
Class of Stock [Line Items]
Common stock shares reserved for future issuance	288,172
Warrants to Purchase Common Stock
Class of Stock [Line Items]
Common stock shares reserved for future issuance	16,151
Shares of Common Stock Issued Upon the Exercise of Public Warrants
Class of Stock [Line Items]
Common stock shares reserved for future issuance	750,383
Earn-Out Shares
Class of Stock [Line Items]
Common stock shares reserved for future issuance	360,000
Convertible Notes
Class of Stock [Line Items]
Common stock shares reserved for future issuance	19,168

XML

Capital Stock and Stockholders' Deficit - Summary of Warrants to Purchase Classes of Preferred Stock and Common Stock Outstanding (Details) - $ / shares	Jun. 30, 2024	Dec. 31, 2023
Class of Warrant or Right [Line Items]
Shares Issuable Upon Exercise of Warrant	16,151	16,151
Weighted Average Exercise Price	$ 202.5
December 1, 2014 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	4 months 24 days	10 months 24 days
Shares Issuable Upon Exercise of Warrant	1,771	1,771
Weighted Average Exercise Price	$ 61	$ 61
March 30, 2021 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	6 years 8 months 12 days	7 years 2 months 12 days
Shares Issuable Upon Exercise of Warrant	5,203	5,203
Weighted Average Exercise Price	$ 168.25	$ 168.25
September 15, 2022 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	8 years 2 months 12 days	8 years 8 months 12 days
Shares Issuable Upon Exercise of Warrant	1,810	1,810
Weighted Average Exercise Price	$ 303.5	$ 303.5
June 4, 2022 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	7 years 10 months 24 days	8 years 4 months 24 days
Shares Issuable Upon Exercise of Warrant	1,810	1,810
Weighted Average Exercise Price	$ 303.5	$ 303.5
January 17, 2017 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	2 years 6 months	3 years
Shares Issuable Upon Exercise of Warrant	2,934	2,934
Weighted Average Exercise Price	$ 0.5	$ 0.5
August 3, 2017 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	3 years 1 month 6 days	3 years 7 months 6 days
Shares Issuable Upon Exercise of Warrant	392	392
Weighted Average Exercise Price	$ 28.25	$ 28.25
September 8, 2017 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	3 years 2 months 12 days	3 years 8 months 12 days
Shares Issuable Upon Exercise of Warrant	1,151	1,151
Weighted Average Exercise Price	$ 26.25	$ 26.25
June 19, 2018 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	4 years	4 years 6 months
Shares Issuable Upon Exercise of Warrant	720	720
Weighted Average Exercise Price	$ 26.25	$ 26.25
June 25, 2019 | Common Stock
Class of Warrant or Right [Line Items]
Remaining Contractual Term (in years)	5 years	5 years 6 months
Shares Issuable Upon Exercise of Warrant	360	360
Weighted Average Exercise Price	$ 26.25	$ 26.25

XML

Net Loss per Share - Summary of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net Income (Loss)	$ (8,322)	$ 1,996	$ (21,996)	$ (17,801)	$ (6,326)	$ (39,797)
Cumulative undeclared preferred dividends to participating securities (Legacy Series D convertible preferred stock)	0		(725)		0	(1,442)
Net loss attributable to common shareholders	$ (8,322)		$ (22,721)		$ (6,326)	$ (41,239)
Denominator:
Weighted-average common shares outstanding - Basic	1,917,872		1,084,300		1,914,527	1,083,897
Weighted-average common shares outstanding - Diluted	1,917,872		1,084,300		1,914,527	1,083,897
Net loss per share attributable to common shareholders - Basic	$ (4.34)		$ (20.95)		$ (3.3)	$ (38.05)
Net loss per share attributable to common shareholders - Diluted	$ (4.34)		$ (20.95)		$ (3.3)	$ (38.05)

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Net Loss per Share - Summary of Dilutive Securities Excluded from Computation of Basic and Diluted Net Loss Per Common Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,457,612	378,953	1,457,612	378,953
Outstanding Options to Purchase Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	288,172	165,442	288,172	165,442
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	23,738	56,605	23,738	56,605
Warrants to Purchase Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	16,151	17,307	16,151	17,307
Shares of Common Stock Issued Upon the Exercise of Public Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	750,383	0	750,383	0
Earn-Out Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	360,000	0	360,000	0
Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	19,168	139,599	19,168	139,599

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Stock Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation costs	$ 1,300	$ 1,300
Remaining weighted-average period		1 year 9 months 18 days
Stock compensation expense		$ 1,357	$ 810
Common stock shares reserved for future issuance	1,457,612	1,457,612
Common stock, shares issued	1,918,927	1,918,927		1,907,529
Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage		62.50%
Restricted Stock Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period		2 years
Stock compensation expense	$ 300	$ 600
Restricted Stock Units | Board of Director Members
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period		3 years
Restricted Stock Units | Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Remaining vesting percentage		37.50%
Stock Options
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted average grant-date fair value of the stock option awards granted		$ 32.5
Options granted during the period		0
Stock compensation expense	$ 500	$ 800
2023 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock shares reserved for future issuance	339,982	339,982
Increase (decrease) in percentage of number of shares reserved for future issuance		5.00%
2023 ESPP
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock shares reserved for future issuance	56,893	56,893
Percentage of price lower of fair value market value		85.00%
Percentage of employees compensation to payroll deductions		15.00%
Percentage of diluted shares outstanding		1.00%
Common stock, shares issued	0	0
2023 ESPP | Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock, shares issued	64,000	64,000
2010 Plan, 2020 Plan, and 2023 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options and RSUs issued and exercisable under the plan	311,685	311,685
Vesting period		4 years
Expiration period		10 years
Unrecognized compensation costs	$ 6,300	$ 6,300
Remaining weighted-average period		3 years 2 months 12 days
2010 Plan and 2020 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options and RSUs issued and exercisable under the plan				181,186

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Stock Based Compensation - Schedule of Stock Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 805	$ 401	$ 1,357	$ 810
Cost of Revenue
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	6	3	11	15
Selling, General and Administrative
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	768	372	1,318	758
Research and Development
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 31	$ 26	$ 28	$ 37

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Stock Based Compensation - Summary of Stock Option Activity Under the Plan (Details) - 2010 Plan, 2020 Plan, 2023 Plan $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Options, Beginning balance | shares	155,441
Number of Options, Granted | shares	147,443
Number of Options, Cancellations and forfeitures | shares	(14,290)
Number of Options, Exercised | shares	(646)
Number of Options, Ending balance | shares	287,948	155,441
Number of Options, Exercisable | shares	114,409
Weighted-Average Exercise Price, Beginning balance | $ / shares	$ 66.75
Weighted-Average Exercise Price, Granted | $ / shares	46.5
Weighted-Average Exercise Price, Cancellations and forfeitures | $ / shares	60.25
Weighted-Average Exercise Price, Exercised | $ / shares	34.25
Weighted-Average Exercise Price, Ending balance | $ / shares	56.75	$ 66.75
Weighted-Average Exercise Price, Exercisable | $ / shares	$ 59.75
Weighted-Average Remaining Contractual Term	8 years 2 months 12 days	6 years 10 months 24 days
Weighted-Average Remaining Contractual Term, Exercisable	6 years 1 month 6 days
Aggregate Intrinsic Value, Outstanding | $	$ 14	$ 5,565
Aggregate Intrinsic Value, Exercisable | $	$ 12

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Stock Based Compensation - Schedule of Assumptions used in Black-Scholes Option-Pricing Model (Details)	6 Months Ended
	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Expected volatility	71.00%
Risk-free interest rate	4.36%
Expected dividend yield	0.00%
Expected term (in years)	6 years 1 month 6 days

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Stock Based Compensation - Summary of Restricted Stock Unit Activity Under the Plan (Details) - Restricted Stock Units - 2020 Plan and 2023 Plan	6 Months Ended
	Jun. 30, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of RSUs, Beginning balance | shares	25,745
Number of RSUs, Granted | shares	3,000
Number of RSUs, Vested | shares	(5,010)
Number of RSUs, Ending balance | shares	23,735
Weighted Average Grant Date Fair Value, Beginning balance | $ / shares	$ 111.25
Weighted Average Grant Date Fair Value, Granted | $ / shares	65.25
Weighted Average Grant Date Fair Value, Vested | $ / shares	112.74
Weighted Average Grant Date Fair Value, Ending balance | $ / shares	$ 105

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Employee Benefit Plan - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan matching contributions	$ 100,000	$ 100,000	$ 100,000	$ 100,000

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Commitments and Contingencies - Additional Information (Details)	1 Months Ended			3 Months Ended	6 Months Ended		12 Months Ended
	Apr. 30, 2024 USD ($)	Aug. 31, 2023	Feb. 28, 2023	Jun. 30, 2024 USD ($) ft²	Jun. 30, 2024 USD ($) ft²	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Lease description					In February 2023 and August 2023, the Company executed amendments to three of its leases in Natick, Massachusetts and its Hudson, Massachusetts lease, respectively. The amendments were accounted for as a modification of the existing lease agreements, with impacts to the lease term, lease payments, and related lease liability for each of the four leases.
Operating lease assets obtained in exchange for lease obligations				$ 15,000	$ 15,000	$ 874,000
Lease total area of land | ft²				51,000	51,000
Lessee, operating lease, right to extend					The Company has a right to extend certain of these leases for periods between three and five years.
Lessee, operating lease, right to extend [true false]					true
Loss contingency for probable losses				$ 0	$ 0		$ 0
Natick and Hudson
Loss Contingencies [Line Items]
Operating lease assets obtained in exchange for lease obligations	$ 100,000						$ 900,000
Maximum
Loss Contingencies [Line Items]
Lessee operating lease expiration period					2028-03
Lessee, operating lease, remaining lease term				5 years	5 years
Maximum | Natick and Hudson
Loss Contingencies [Line Items]
Lessee operating lease expiration period		2028-03	2028-03
Minimum
Loss Contingencies [Line Items]
Lessee operating lease expiration period					2024-06
Lessee, operating lease, remaining lease term				3 years	3 years

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Commitments and Contingencies - Schedule of Other Pertinent Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Operating lease costs	$ 257	$ 275	$ 535	$ 549
Short-term lease costs	10	7	20	13
Variable lease costs	58	72	135	160
Operating cash flows paid for amounts in the measurement of lease liabilities	263	$ 284	555	546
Operating lease assets obtained in exchange for lease obligations	$ 15		$ 15	$ 874

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Commitments and Contingencies - Schedule of Future Commitments Under Non-cancelable Operating Lease Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
2024	$ 535
2025	1,035
2026	730
2027	641
2028	108
Total lease payments	3,049
Less: present value adjustment	(411)
Total lease liabilities	2,638
Less: current lease liability	(850)	$ (908)
Long-term operating lease liabilities	$ 1,788	$ 2,306

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Commitments and Contingencies - Schedule of Weighted-Average Remaining Lease Terms and Discount Rates Related Leases (Details)	Jun. 30, 2024	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Operating leases, weighted -average remaining lease term (in years)	3 years 1 month 6 days	3 years 10 months 24 days
Operating leases, weighted-average discount rate	9.90%	9.50%

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Segment Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2024 Segment
Segment Reporting [Abstract]
Number of operating segments	1
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	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.
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember

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Segment Information - Schedule of Significant Segment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 11,766		$ 12,960		$ 21,152	$ 27,031
Cost of revenue	2,773		2,992		5,293	5,932
Sales and marketing	6,718		10,273		12,863	22,137
Research and development	4,310		6,581		10,035	14,433
General and administrative	7,311		6,408		13,697	11,714
Other segment items	(1,024)		8,702		(14,410)	12,612
Net loss	(8,322)	$ 1,996	(21,996)	$ (17,801)	(6,326)	(39,797)
Clinical Trials and Medical Affairs
Segment Reporting Information [Line Items]
Research and development	2,371		3,672		5,642	8,333
Product Development
Segment Reporting Information [Line Items]
Research and development	739		1,066		1,783	2,493
Digital
Segment Reporting Information [Line Items]
Research and development	621		1,117		1,369	2,100
Quality and Regulatory
Segment Reporting Information [Line Items]
Research and development	$ 579		$ 726		$ 1,241	$ 1,507

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Segment Information - Schedule of Long-lived Assets by Geography (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 5,735	$ 6,391
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	5,008	5,381
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	727	1,010
All Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 0	$ 0

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Related-party Transactions - Additional Information (Details) $ in Thousands					1 Months Ended		3 Months Ended			6 Months Ended
	Jun. 28, 2024 USD ($) shares	Apr. 16, 2024 USD ($)	Dec. 12, 2023 USD ($)	Feb. 15, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Aug. 31, 2022 USD ($)	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($)	Dec. 31, 2023 shares
Related Party Transaction [Line Items]
Operating lease, payments							$ 263	$ 284		$ 555	$ 546
Percentage of outstanding capital stock				5.00%
Conversion of warrants into shares of common stock | shares							16,151			16,151		16,151
2023 Convertible Notes | Hunter Ventures Limited [Member]
Related Party Transaction [Line Items]
Debt instrument issued				$ 13,000
Consulting Agreements
Related Party Transaction [Line Items]
Agreements termination date									Jun. 20, 2023
Convertible Note Agreement with RTW
Related Party Transaction [Line Items]
Percentage of Outstanding Common Stock		5.00%
Principal amount		$ 48,000
RTW Participation in Public Offering
Related Party Transaction [Line Items]
Sale of stock | shares										9,594
Aggregate purchase price										$ 300
Private Placement with RTW
Related Party Transaction [Line Items]
Conversion of warrants into shares of common stock | shares	90,407
Aggregate purchase price	$ 2,700
Private Placement with RTW | Series A Preferred Stock
Related Party Transaction [Line Items]
Sale of stock | shares	2,260,159
LNMP JPBC Invest
Related Party Transaction [Line Items]
Operating lease, payments						$ 100
Operating lease start date						Aug. 01, 2022
Operating lease end date						Jul. 31, 2025
Lease terminated date						2024-02
KKG Enterprises | Consulting Agreements
Related Party Transaction [Line Items]
Payments of advisory services related to business combination									$ 200
Remus Group Management | Consulting Agreements
Related Party Transaction [Line Items]
Payments of advisory services related to business combination									$ 300
Benoit Chardon Consulting | Consulting Agreements
Related Party Transaction [Line Items]
Agreements termination date					Dec. 12, 2023
Consulting fees | €					€ 28,333.33
Benoit Chardon Consulting | Termination Agreement
Related Party Transaction [Line Items]
Termination fees			$ 200

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Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended	6 Months Ended
	Aug. 12, 2024	Jul. 05, 2024	Jul. 01, 2024	Jun. 28, 2024	Mar. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Subsequent Event [Line Items]
Common stock, par value						$ 0.0001	$ 0.0001
Conversion of warrants into shares of common stock						16,151	16,151
Exercise price of warrants						$ 202.5
Gross proceeds from offering						$ 378
Preferred stock, par value						$ 0.0001	$ 0.0001
Public Offering
Subsequent Event [Line Items]
Sale of stock				576,261
Conversion of warrants into shares of common stock				576,261
Sale of stock, price per share				$ 30
Underwriters
Subsequent Event [Line Items]
Sale of stock				86,440
Conversion of warrants into shares of common stock				86,440
Private Placement
Subsequent Event [Line Items]
Conversion of warrants into shares of common stock				90,407
Aggregate purchase price				$ 2,700
Subsequent Events
Subsequent Event [Line Items]
Stock exchange listing requirements description	On August 12, 2024, we received a letter from NYSE notifying us that, as of August 8, 2024, for the last 30 consecutive business days, the average closing price of the Company’s common stock was less than $1.00 per share, the minimum average closing bid price required by the continued listing requirements of Rule 802.01C of the NYSE Listed Company Manual. A company can regain compliance with the minimum share price requirement at any time during the six-month cure period if, on the last trading day of any calendar month during the cure period, the company has (i) a closing share price of at least $1.00 and (ii) an average closing share price of at least $1.00 over the 30 trading-day period ending on the last trading day of that month. In the event that at the expiration of the six-month cure period, both a $1.00 closing share price on the last trading day of the cure period and a $1.00 average closing share price over the 30 trading-day period ending on the last trading day of the cure period are not attained, the NYSE will commence suspension and delisting procedures. We intend to monitor the closing bid price of our Common Stock and may, if appropriate, consider available options to regain compliance with the NYSE minimum share price requirement.
Subsequent Events | Public Offering
Subsequent Event [Line Items]
Sale of stock		77,091
Conversion of warrants into shares of common stock			86,440
Gross proceeds from offering			$ 17,300
Subsequent Events | Underwriters
Subsequent Event [Line Items]
Gross proceeds from offering		$ 2,300
Subsequent Events | Private Placement
Subsequent Event [Line Items]
Gross proceeds from offering			$ 2,700
Series A Preferred Stock | Private Placement
Subsequent Event [Line Items]
Sale of stock				2,260,159
Preferred stock, par value				$ 0.0001
Common Stock
Subsequent Event [Line Items]
Shares issued					5,730
Common Stock | Subsequent Events
Subsequent Event [Line Items]
Exercise price of warrants		$ 30