Westlake BioPartners Opportunity Fund I, L.P. - 18 Dec 2025 Form 4 Insider Report for Kyverna Therapeutics, Inc. (KYTX)

Role: 10%+ Owner
Signature: By: /s/ Jennifer L. Kercher, as Attorney-in-Fact
Issuer symbol: KYTX
Transactions as of: 18 Dec 2025
Net transactions value: +$999,998
Form type: 4
Filing time: 22 Dec 2025, 11:42:37 UTC
SEC: View on sec.gov

Reporting Owners (4)

Name	Relationship	Address	Signature	Signature date	CIK
Westlake BioPartners Opportunity Fund I, L.P.	10%+ Owner	C/O WESTLAKE BIOPARTNERS, LLC, 3075 TOWNSGATE ROAD, SUITE 140, WESTLAKE VILLAGE	By: /s/ Jennifer L. Kercher, as Attorney-in-Fact	22 Dec 2025	0001811946
Westlake BioPartners Opportunity GP I, LLC	10%+ Owner	C/O WESTLAKE BIOPARTNERS, LLC, 3075 TOWNSGATE ROAD, SUITE 140, WESTLAKE VILLAGE	By: /s/ Jennifer L. Kercher, as Attorney-in-Fact	22 Dec 2025	0001811945
Westlake BioPartners Fund I, L.P.	10%+ Owner	C/O WESTLAKE BIOPARTNERS, LLC, 3075 TOWNSGATE ROAD, SUITE 140, WESTLAKE VILLAGE	By: /s/ Jennifer L. Kercher, as Attorney-in-Fact	22 Dec 2025	0001749591
Westlake BioPartners GP I, LLC	10%+ Owner	C/O WESTLAKE BIOPARTNERS, LLC, 3075 TOWNSGATE ROAD, SUITE 140, WESTLAKE VILLAGE	By: /s/ Jennifer L. Kercher, as Attorney-in-Fact	22 Dec 2025	0002007650

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	KYTX	Common Stock	Purchase	$999,998	+133,333	+18%	$7.50	869,317	18 Dec 2025	See Footnote	F1
holding	KYTX	Common Stock						3,787,940	18 Dec 2025	See Footnote	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Westlake BioPartners Opportunity Fund I, L.P. is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id	Content
F1	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.
F2	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.

Content

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.

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.