# EDGAR Filing Document

**Accession Number:** 0001994702
**File Stem:** 0001104659-25-123596
**Filing Date:** 2025-12
**Character Count:** 12050
**Document Hash:** 46ec1cf58979d985c2deace31c74d7f8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-123596.hdr.sgml**: 20251222

**ACCESSION NUMBER**: 0001104659-25-123596

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251218

**FILED AS OF DATE**: 20251222

**DATE AS OF CHANGE**: 20251222

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Westlake BioPartners Fund I, L.P.
- **CENTRAL INDEX KEY:** 0001749591

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

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41947
- **FILM NUMBER:** 251590782

**BUSINESS ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
- **BUSINESS PHONE:** (650) 740-4070

**MAIL ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Westlake BioPartners Opportunity GP I, LLC
- **CENTRAL INDEX KEY:** 0001811945

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

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41947
- **FILM NUMBER:** 251590783

**BUSINESS ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
- **BUSINESS PHONE:** 805-465-9588

**MAIL ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Westlake BioPartners GP I, LLC
- **CENTRAL INDEX KEY:** 0002007650

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

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41947
- **FILM NUMBER:** 251590781

**BUSINESS ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
- **BUSINESS PHONE:** 805-465-9588

**MAIL ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Westlake BioPartners Opportunity Fund I, L.P.
- **CENTRAL INDEX KEY:** 0001811946

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

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41947
- **FILM NUMBER:** 251590784

**BUSINESS ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
- **BUSINESS PHONE:** 805-465-9588

**MAIL ADDRESS:**
- **STREET 1:** 3075 TOWNSGATE ROAD, SUITE 140
- **CITY:** WESTLAKE VILLAGE
- **STATE:** CA
- **ZIP:** 91361
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Kyverna Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001994702
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 831365441
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 5980 HORTON STREET
- **STREET 2:** SUITE 550
- **CITY:** EMERYVILLE
- **STATE:** CA
- **ZIP:** 94608
- **BUSINESS PHONE:** 5106268331

**MAIL ADDRESS:**
- **STREET 1:** 5980 HORTON STREET
- **STREET 2:** SUITE 550
- **CITY:** EMERYVILLE
- **STATE:** CA
- **ZIP:** 94608

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[x] 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>Westlake BioPartners Opportunity Fund I, L.P.<br><sub>(Last) (First) (Middle)</sub><br>C/O WESTLAKE BIOPARTNERS, LLC<br>3075 TOWNSGATE ROAD, SUITE 140<br><sub>(Street)</sub><br>WESTLAKE VILLAGE, CA 91361<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-12-18 | **5. 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>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Kyverna Therapeutics, Inc. [ KYTX ] | **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>Westlake BioPartners Opportunity GP I, LLC<br><sub>(Last) (First) (Middle)</sub><br>C/O WESTLAKE BIOPARTNERS, LLC<br>3075 TOWNSGATE ROAD, SUITE 140<br><sub>(Street)</sub><br>WESTLAKE VILLAGE, CA 91361<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-12-18 | **5. 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>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Kyverna Therapeutics, Inc. [ KYTX ] | **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>Westlake BioPartners Fund I, L.P.<br><sub>(Last) (First) (Middle)</sub><br>C/O WESTLAKE BIOPARTNERS, LLC<br>3075 TOWNSGATE ROAD, SUITE 140<br><sub>(Street)</sub><br>WESTLAKE VILLAGE, CA 91361<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-12-18 | **5. 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>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Kyverna Therapeutics, Inc. [ KYTX ] | **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>Westlake BioPartners GP I, LLC<br><sub>(Last) (First) (Middle)</sub><br>C/O WESTLAKE BIOPARTNERS, LLC<br>3075 TOWNSGATE ROAD, SUITE 140<br><sub>(Street)</sub><br>WESTLAKE VILLAGE, CA 91361<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-12-18 | **5. 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>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Kyverna Therapeutics, Inc. [ KYTX ] | **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 | 2025-12-18 |  | P |  | 133333 | A | $7.50 | 869317 | I | See Footnote<sup>(1)</sup> |
| Common Stock |  |  |  |  |  |  |  | 3787940 | I | See Footnote<sup>(2)</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 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) Shares held directly by Westlake BioPartners Opportunity Fund I, L.P. ("Westlake Opportunity"). The general partner of Westlake Opportunity is Westlake BioPartners Opportunity GP I, LLC ("Westlake Opportunity GP I"). The voting and dispositive control over Westlake Opportunity GP I is held by the managing director of Westlake Opportunity GP I, Beth Seidenberg, and whom disclaims beneficial ownership of the shares held by Westlake Opportunity except to the extent of such person's pecuniary interest therein, if any. Sean Harper, a Reporting Person on Westlake Opportunity's prior Section 16 filings with respect to the Issuer, is no longer a managing director of Westlake Opportunity GP I, and accordingly, is not a Reporting Person on this Form 4.

(2) Shares held directly by Westlake BioPartners Fund I, L.P. ("Westlake I"). The general partner of Westlake I is Westlake BioPartners GP I, LLC ("Westlake GP I"). The voting and dispositive control over Westlake GP I is held by the managing director of Westlake GP I, Beth Seidenberg, and whom disclaims beneficial ownership of the shares held by Westlake I except to the extent of such person's pecuniary interest therein, if any. Sean Harper, a Reporting Person on Westlake I's prior Section 16 filings with respect to the Issuer, is no longer a managing director of Westlake GP I, and accordingly, is not a Reporting Person on this Form 4.

**Signature:** By: /s/ Jennifer L. Kercher, as Attorney-in-Fact  
**Date:** 2025-12-22

### 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.**