Richard Chen - 23 Feb 2026 Form 4 Insider Report for Personalis, Inc. (PSNL)

Role: CHIEF MEDICAL OFFICER AND EVP
Signature: /s/ Aaron Tachibana, Attorney-in-Fact
Issuer symbol: PSNL
Transactions as of: 23 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 25 Feb 2026, 18:50:15 UTC
Previous filing: 30 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Chen Richard	CHIEF MEDICAL OFFICER AND EVP	C/O PERSONALIS, INC., 6600 DUMBARTON CIRCLE, FREMONT	/s/ Aaron Tachibana, Attorney-in-Fact	25 Feb 2026	0001779787

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	PSNL	Stock Option (right to buy)	Award	$0	+15,000		$0.000000	15,000	23 Feb 2026	Common Stock	15,000	$1.61	Direct	F1

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

Explanation of Responses:

Id	Content
F1	This amount represents the vesting of a performance stock option granted on March 15, 2024, following the satisfaction of a specified reimbursement milestone.