# EDGAR Filing Document

**Accession Number:** 0001776733
**File Stem:** 0001231919-25-000468
**Filing Date:** 2025-11
**Character Count:** 14147
**Document Hash:** ca6849cbc59c593fdbdd5dc9f4a43293
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001231919-25-000468.hdr.sgml**: 20251113

**ACCESSION NUMBER**: 0001231919-25-000468

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251112

**FILED AS OF DATE**: 20251113

**DATE AS OF CHANGE**: 20251113

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** RTW INVESTMENTS, LP
- **CENTRAL INDEX KEY:** 0001493215

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41767
- **FILM NUMBER:** 251479889

**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 NAME:**
- **FORMER CONFORMED NAME:** RTW INVESTMENTS, LLC
- **DATE OF NAME CHANGE:** 20100602
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** RTW MASTER FUND, LTD.
- **CENTRAL INDEX KEY:** 0001493219

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41767
- **FILM NUMBER:** 251479887

**BUSINESS ADDRESS:**
- **STREET 1:** C/O WALKERS CORPORATE LIMITED
- **STREET 2:** 190 ELGIN AVENUE
- **CITY:** GEORGE TOWN, GRAND CAYMAN
- **STATE:** E9
- **ZIP:** KY1-9008
- **BUSINESS PHONE:** 345-949-6765

**MAIL ADDRESS:**
- **STREET 1:** C/O WALKERS CORPORATE LIMITED
- **STREET 2:** 190 ELGIN AVENUE
- **CITY:** GEORGE TOWN, GRAND CAYMAN
- **STATE:** E9
- **ZIP:** KY1-9008

**FORMER NAME:**
- **FORMER CONFORMED NAME:** RTW OFFSHORE FUND ONE, LTD
- **DATE OF NAME CHANGE:** 20150521

**FORMER NAME:**
- **FORMER CONFORMED NAME:** RTW MASTER FUND, LTD.
- **DATE OF NAME CHANGE:** 20100602
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** WONG RODERICK
- **CENTRAL INDEX KEY:** 0001493280

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41767
- **FILM NUMBER:** 251479888

**MAIL ADDRESS:**
- **STREET 1:** C/O RTW INVESTMENTS, LP
- **STREET 2:** 40 10TH AVENUE, 7TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10014
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** RTW Innovation Master Fund Ltd.
- **CENTRAL INDEX KEY:** 0001776733

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41767
- **FILM NUMBER:** 251479886

**BUSINESS ADDRESS:**
- **STREET 1:** C/O WALKERS CORPORATE LIMITED
- **STREET 2:** 190 ELGIN AVENUE
- **CITY:** GEORGE TOWN, GRAND CAYMAN
- **STATE:** E9
- **ZIP:** KY1-9008
- **BUSINESS PHONE:** 6465976982

**MAIL ADDRESS:**
- **STREET 1:** C/O WALKERS CORPORATE LIMITED
- **STREET 2:** 190 ELGIN AVENUE
- **CITY:** GEORGE TOWN, GRAND CAYMAN
- **STATE:** E9
- **ZIP:** KY1-9008
**ISSUER**: 

**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

**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

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>RTW INVESTMENTS, LP<br><sub>(Last) (First) (Middle)</sub><br>40 10TH AVENUE, 7TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10014<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-12 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ALLURION TECHNOLOGIES, INC. [ ALUR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>WONG RODERICK<br><sub>(Last) (First) (Middle)</sub><br>40 10TH AVENUE, 7TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10014<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-12 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ALLURION TECHNOLOGIES, INC. [ ALUR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>RTW MASTER FUND, LTD.<br><sub>(Last) (First) (Middle)</sub><br>40 10TH AVENUE, 7TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10014<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-12 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ALLURION TECHNOLOGIES, INC. [ ALUR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>RTW Innovation Master Fund Ltd.<br><sub>(Last) (First) (Middle)</sub><br>40 10TH AVENUE, 7TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10014<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-12 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ALLURION TECHNOLOGIES, INC. [ ALUR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock, $0.0001 par value per share | 2025-11-12 |  | A |  | 991544 | A | 1.67<sup>(1)</sup> | 3138798 | I | See footnotes<sup>(2)(3)</sup> |
| Common Stock, $0.0001 par value per share | 2025-11-12 |  | A |  | 767848 | A | 1.67<sup>(1)</sup> | 2427089 | I | See footnotes<sup>(2)(4)</sup> |
| Common Stock, $0.0001 par value per share | 2025-11-12 |  | A |  | 96896 | A | 1.67<sup>(1)</sup> | 298992 | I | See footnotes<sup>(2)(5)</sup> |
| Common Stock, $0.0001 par value per share |  |  |  |  |  |  |  | 26551 | I | See footnotes<sup>(2)(5)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Warrant (Right to Buy) | $1.67 | 2025-11-12 |  | A |  | 991544 |  | <sup>(6)</sup> | <sup>(6)</sup> | Common Stock | 991544 | <sup>(1)</sup> | 991544 | I | See footnotes<sup>(2)(3)</sup> |
| Warrant (Right to Buy) | $1.67 | 2025-11-12 |  | A |  | 767848 |  | <sup>(6)</sup> | <sup>(6)</sup> | Common Stock | 767848 | <sup>(1)</sup> | 767848 | I | See footnotes<sup>(2)(4)</sup> |
| Warrant (Right to Buy) | $1.67 | 2025-11-12 |  | A |  | 96896 |  | <sup>(6)</sup> | <sup>(6)</sup> | Common Stock | 96896 | <sup>(1)</sup> | 96896 | I | See footnotes<sup>(2)(5)</sup> |

---

### Footnotes:

(1) The Reporting Persons acquired the shares of Common Stock and Warrants in a private placement by the Issuer.  The purchase price per share of Common Stock and accompanying Warrant was $1.67 per share and accompanying Warrant.

(2) RTW Investments, LP (the "Adviser") manages certain funds that directly hold the securities reported herein, including RTW Master Fund, Ltd. ("Master Fund"), RTW Innovation Master Fund, Ltd. ("RTW Innovation") and other funds or accounts managed by the Adviser (each, an "Other RTW Fund"). Roderick Wong, M.D. serves as the Managing Partner and Chief Investment Officer of the Adviser. Each Reporting Person disclaims beneficial ownership of the securities reported on this Form 4 except to the extent of its or his pecuniary interest, if any, therein, and this report shall not be deemed to be an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

(3) Held directly by Master Fund.

(4) Held directly by RTW Innovation.

(5) Held by an Other RTW Fund.

(6) The Warrant is exercisable following receipt of the Stockholder Approval (as defined herein) at an exercise price of $1.67 per share and terminates on the five year anniversary of the date of the Stockholder Approval. The holder of the Warrant may not exercise such Warrant if the holder, together with its affiliates, would beneficially own more than 4.99% (or, at the election of the holder, 9.99%) of the number of shares of Common Stock outstanding immediately after giving effect to such exercise. The Issuer is required to use its reasonable best efforts to hold a meeting of stockholders no later than January 31, 2026 for the purpose of, among other things, obtaining stockholder approval of the issuance of the shares of Common Stock issuable upon exercise of the Warrants (the "Stockholder Approval").

**Remarks:**
Pursuant to the terms of the Amended Note Purchase Agreement, RTW Investments, LP has the right to designate two members of the Issuer's board of directors (the "Board"), and has designated Keith Johns and R. Jason Richey to the Board. Mr. Richey is a consultant of RTW Investments.

**Signature:** /s/ Roderick Wong, M.D. - For RTW Investments, L.P., By: Roderick Wong, M.D., Managing Partner  
**Date:** 2025-11-13

**Signature:** /s/ Roderick Wong, M.D.  
**Date:** 2025-11-13

**Signature:** /s/ Darshan Patel - For RTW Master Fund, Ltd., By Darshan Patel, Director  
**Date:** 2025-11-13

**Signature:** /s/ Darshan Patel - For RTW Innovation Master Fund, Ltd., By Darshan Patel, Director  
**Date:** 2025-11-13

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**