# EDGAR Filing Document

**Accession Number:** 0002096997
**File Stem:** 0001829126-26-003567
**Filing Date:** 2026-4
**Character Count:** 5574
**Document Hash:** 1289ae6bdd5be22bbe63807d481d7f07
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001829126-26-003567.hdr.sgml**: 20260416

**ACCESSION NUMBER**: 0001829126-26-003567

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260416

**FILED AS OF DATE**: 20260416

**DATE AS OF CHANGE**: 20260416

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Stuart Partners, LLC
- **CENTRAL INDEX KEY:** 0002128737

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

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43233
- **FILM NUMBER:** 26868714

**BUSINESS ADDRESS:**
- **STREET 1:** ONE JOY STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02108
- **BUSINESS PHONE:** (617) 720 5800

**MAIL ADDRESS:**
- **STREET 1:** ONE JOY STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02108
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Kailera Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0002096997
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 180 THIRD AVENUE
- **STREET 2:** 4TH FLOOR
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02451
- **BUSINESS PHONE:** 508-440-9475

**MAIL ADDRESS:**
- **STREET 1:** 180 THIRD AVENUE
- **STREET 2:** 4TH FLOOR
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02451

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Stuart Partners, LLC<br><sub>(Last) (First) (Middle)</sub><br>ONE JOY STREET<br><sub>(Street)</sub><br>BOSTON, MA 02108<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Kailera Therapeutics, Inc. [ KLRA ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-04-16 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [X] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Series B Preferred Stock | <sup>(1)</sup> | <sup>(1)</sup> | Common Stock | 1428571 | <sup>(1)</sup> | D<sup>(2)</sup> |  |

---

### Footnotes:

(1) The Series B Preferred Stock, par value $0.00001 per share, of the Issuer is convertible into shares of the Issuer's common stock, par value $0.00001 per share, on a one-for-one basis and will mandatorily convert into Common Stock upon the closing of the Issuer's initial public offering.

(2) The securities reported herein are held directly by The Stuart Partners, LLC. SP Investment Associates, LLC, a Delaware limited liability company, is the sole member and manager of The Stuart Partners, LLC and has voting and dispositive power over such securities. The Manager of SP Investment Associates, LLC is Roundview Partners, LLC, which may be deemed to share voting and dispositive power over the securities held by The Stuart Partners, LLC. Roundview Partners, LLC's Manager, Anastasios Parafestas, may be deemed to share voting and dispositive power over the securities held by The Stuart Partners, LLC. All such parties disclaim beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein.

**Signature:** /s/ Anastasios Parafestas, Manager of Roundview Partners, LLC, Manager of SP Investment Associates, LLC, Manager of The Stuart Partners, LLC  
**Date:** 2026-04-16

### 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.**