<SEC-DOCUMENT>0001493215-25-000016.txt : 20251107
<SEC-HEADER>0001493215-25-000016.hdr.sgml : 20251107
<ACCEPTANCE-DATETIME>20251107172159
ACCESSION NUMBER:		0001493215-25-000016
CONFORMED SUBMISSION TYPE:	SCHEDULE 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251107
DATE AS OF CHANGE:		20251107

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALLURION TECHNOLOGIES, INC.
		CENTRAL INDEX KEY:			0001964979
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-94138
		FILM NUMBER:		251463661

	BUSINESS ADDRESS:	
		STREET 1:		11 HURON DR STE 200
		CITY:			NATICK
		STATE:			MA
		ZIP:			01760
		BUSINESS PHONE:		508-647-4000

	MAIL ADDRESS:	
		STREET 1:		11 HURON DR STE 200
		CITY:			NATICK
		STATE:			MA
		ZIP:			01760

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLURION TECHNOLOGIES HOLDINGS, INC.
		DATE OF NAME CHANGE:	20230207

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RTW INVESTMENTS, LP
		CENTRAL INDEX KEY:			0001493215
		ORGANIZATION NAME:           	
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		40 10TH AVENUE
		STREET 2:		7TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014
		BUSINESS PHONE:		646-597-6980

	MAIL ADDRESS:	
		STREET 1:		40 10TH AVENUE
		STREET 2:		7TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RTW INVESTMENTS, LLC
		DATE OF NAME CHANGE:	20100602
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13D" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>SCHEDULE 13D/A</submissionType>
		<previousAccessionNumber>0000902664-23-004381</previousAccessionNumber>
	    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001493215</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>





    </filerInfo>
  </headerData>

  <formData>
    <coverPageHeader>
		<amendmentNo>9</amendmentNo>
	      <securitiesClassTitle>Common Stock, par value $0.0001 per share</securitiesClassTitle>
      <dateOfEvent>11/05/2025</dateOfEvent>
	  <previouslyFiledFlag>false</previouslyFiledFlag>
      <issuerInfo>
        <issuerCIK>0001964979</issuerCIK>
        <issuerCUSIP>02008G201</issuerCUSIP>
		<issuerName>ALLURION TECHNOLOGIES, INC.</issuerName>

        <address>
          <com:street1>11 Huron Drive</com:street1>
                    <com:city>Natick</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01760</com:zipCode>
        </address>
      </issuerInfo>

	  	  <authorizedPersons>

		<notificationInfo>
			<personName>Roderick Wong, M.D.</personName>
			<personPhoneNum>(646) 597-6980</personPhoneNum>
				<personAddress>
					<com:street1>RTW Investments, LP</com:street1>
					<com:street2>40 10th Avenue, Floor 7</com:street2>					<com:city>New York</com:city>
					<com:stateOrCountry>NY</com:stateOrCountry>
					<com:zipCode>10014</com:zipCode>
				</personAddress>
		</notificationInfo>
			</authorizedPersons>
	    </coverPageHeader>

	<reportingPersons>


			<reportingPersonInfo>
									<reportingPersonCIK>0001493215</reportingPersonCIK>

				<reportingPersonNoCIK>N</reportingPersonNoCIK>
				<reportingPersonName>RTW Investments, LP</reportingPersonName>





				  				  <fundType>AF</fundType>




				<legalProceedings>N</legalProceedings>

								<citizenshipOrOrganization>DE</citizenshipOrOrganization>
												<soleVotingPower>0.00</soleVotingPower>
												<sharedVotingPower>4035142.00</sharedVotingPower>
												<soleDispositivePower>0.00</soleDispositivePower>

				<sharedDispositivePower>4035142.00</sharedDispositivePower>
												<aggregateAmountOwned>4035142.00</aggregateAmountOwned>

				<isAggregateExcludeShares>N</isAggregateExcludeShares>

								<percentOfClass>43.6</percentOfClass>





			  			  <typeOfReportingPerson>IA</typeOfReportingPerson>

			  			  <typeOfReportingPerson>PN</typeOfReportingPerson>









			</reportingPersonInfo>

			<reportingPersonInfo>
									<reportingPersonCIK>0001493219</reportingPersonCIK>

				<reportingPersonNoCIK>N</reportingPersonNoCIK>
				<reportingPersonName>RTW Master Fund, Ltd.</reportingPersonName>






				  				  <fundType>WC</fundType>



				<legalProceedings>N</legalProceedings>

								<citizenshipOrOrganization>E9</citizenshipOrOrganization>
												<soleVotingPower>0.00</soleVotingPower>
												<sharedVotingPower>2147254.00</sharedVotingPower>
												<soleDispositivePower>0.00</soleDispositivePower>

				<sharedDispositivePower>2147254.00</sharedDispositivePower>
												<aggregateAmountOwned>2147254.00</aggregateAmountOwned>

				<isAggregateExcludeShares>N</isAggregateExcludeShares>

								<percentOfClass>23.2</percentOfClass>










			  			  <typeOfReportingPerson>CO</typeOfReportingPerson>





			</reportingPersonInfo>

			<reportingPersonInfo>
									<reportingPersonCIK>0001776733</reportingPersonCIK>

				<reportingPersonNoCIK>N</reportingPersonNoCIK>
				<reportingPersonName>RTW Innovation Master Fund, Ltd.</reportingPersonName>






				  				  <fundType>WC</fundType>



				<legalProceedings>N</legalProceedings>

								<citizenshipOrOrganization>E9</citizenshipOrOrganization>
												<soleVotingPower>0.00</soleVotingPower>
												<sharedVotingPower>1659241.00</sharedVotingPower>
												<soleDispositivePower>0.00</soleDispositivePower>

				<sharedDispositivePower>1659241.00</sharedDispositivePower>
												<aggregateAmountOwned>1659241.00</aggregateAmountOwned>

				<isAggregateExcludeShares>N</isAggregateExcludeShares>

								<percentOfClass>17.9</percentOfClass>










			  			  <typeOfReportingPerson>CO</typeOfReportingPerson>





			</reportingPersonInfo>

			<reportingPersonInfo>
									<reportingPersonCIK>0001493280</reportingPersonCIK>

				<reportingPersonNoCIK>N</reportingPersonNoCIK>
				<reportingPersonName>Roderick Wong</reportingPersonName>





				  				  <fundType>AF</fundType>




				<legalProceedings>N</legalProceedings>

								<citizenshipOrOrganization>X1</citizenshipOrOrganization>
												<soleVotingPower>0.00</soleVotingPower>
												<sharedVotingPower>4035142.00</sharedVotingPower>
												<soleDispositivePower>0.00</soleDispositivePower>

				<sharedDispositivePower>4035142.00</sharedDispositivePower>
												<aggregateAmountOwned>4035142.00</aggregateAmountOwned>

				<isAggregateExcludeShares>N</isAggregateExcludeShares>

								<percentOfClass>43.6</percentOfClass>








			  			  <typeOfReportingPerson>HC</typeOfReportingPerson>



			  			  <typeOfReportingPerson>IN</typeOfReportingPerson>




			</reportingPersonInfo>
			</reportingPersons>


	<items1To7>
		<item1>
			<securityTitle>Common Stock, par value $0.0001 per share</securityTitle>
			<issuerName>ALLURION TECHNOLOGIES, INC.</issuerName>

			<issuerPrincipalAddress>
			 <com:street1>11 Huron Drive</com:street1>
			  			  <com:city>Natick</com:city>
			  <com:stateOrCountry>MA</com:stateOrCountry>
			  <com:zipCode>01760</com:zipCode>
			</issuerPrincipalAddress>

					</item1>


				<item3>
			<fundsSource>Item 3 of the Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 5(c) of this Amendment No. 9 is incorporated by reference herein to this Item 3.
</fundsSource>
		</item3>

				<item4>
			<transactionPurpose>Item 4 of the Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 5(c) of this Amendment No. 9 is incorporated by reference herein to this Item 4.
</transactionPurpose>
		</item4>

				<item5>
			 <percentageOfClassSecurities>Items 5(a)-(c) of the Schedule 13D are hereby amended and supplemented as follows:

The aggregate percentage of Shares reported to be beneficially owned by the Reporting Persons is based upon (i) 7,762,681 Shares outstanding as of August 8, 2025, as disclosed in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 19, 2025, and (ii) an additional 1,492,539 Shares issued pursuant to the November 2025 Conversion Notice (as defined in Item 6). The remaining principal amount of the Notes are subject to a beneficial ownership conversion limitation such that the RTW Funds cannot convert Notes to the extent it would result in the RTW Funds and their affiliates beneficially owning more than 9.99% of the Issuer's Shares, except as described in Item 6 hereof. The Warrants held by the RTW Funds are subject to a Blocker (as defined in Item 4 of Amendment No. 2 to the Schedule 13D), which is currently set at 4.99% and can be increased to 9.99% upon 61 days' prior notice by RTW.

</percentageOfClassSecurities>			<numberOfShares>See rows (7) through (10) of the cover pages to this Schedule 13D for the number of shares of Common Stock as to which each Reporting Person has the sole or shared power to vote or direct the vote and sole or shared power to dispose or to direct the disposition.</numberOfShares>			<transactionDesc>On November 5, 2025, the RTW Funds delivered the November 2025 Conversion Notice to acquire 1,492,539 Shares. Other than as reported herein, the Reporting Persons did not effect any transactions with respect to the Shares during the past sixty (60) days.</transactionDesc>								</item5>

				<item6>
			<contractDescription>Item 6 of the Statement is hereby amended and supplemented as follows:

On November 5, 2025, pursuant to the terms of the Amended Note Purchase Agreement, the RTW Funds provided the Company with, and the Company accepted, a conversion notice (the "November 2025 Conversion Notice"), pursuant to which $5.0 million aggregate principal amount of the Notes was converted into an aggregate of 1,492,539 Shares.

</contractDescription>
		</item6>


	</items1To7>

<signatureInfo>

	<signaturePerson>
		<signatureReportingPerson>RTW Investments, LP</signatureReportingPerson>

					<signatureDetails>
				<signature>/s/ Roderick Wong, M.D.</signature>
				<title>Roderick Wong, M.D., Managing Partner</title>
				<date>11/07/2025</date>
			</signatureDetails>

	</signaturePerson>

	<signaturePerson>
		<signatureReportingPerson>RTW Master Fund, Ltd.</signatureReportingPerson>

					<signatureDetails>
				<signature>/s/ Roderick Wong, M.D.</signature>
				<title>Roderick Wong, M.D., Director</title>
				<date>11/07/2025</date>
			</signatureDetails>

	</signaturePerson>

	<signaturePerson>
		<signatureReportingPerson>RTW Innovation Master Fund, Ltd.</signatureReportingPerson>

					<signatureDetails>
				<signature>/s/ Roderick Wong, M.D.</signature>
				<title>Roderick Wong, M.D., Director</title>
				<date>11/07/2025</date>
			</signatureDetails>

	</signaturePerson>

	<signaturePerson>
		<signatureReportingPerson>Roderick Wong</signatureReportingPerson>

					<signatureDetails>
				<signature>/s/ Roderick Wong, M.D.</signature>
				<title>Roderick Wong, M.D.</title>
				<date>11/07/2025</date>
			</signatureDetails>

	</signaturePerson>



</signatureInfo>
</formData>


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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
