Personalis, Inc. — Director's Dealing 2021

May 18, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Personalis, Inc. (PSNL)
CIK: 0001527753
Period of Report: 2021-05-15

Reporting Person: West John Stephen (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-15	Common Stock	A	53750	$0.00	Acquired	560520	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-15	Stock Option (right to buy)	$19.74	A	110000	Acquired	2031-05-15	Common Stock (110000)	Direct
2021-05-15	Stock Option (right to buy)	$19.74	A	107500	Acquired	2031-05-15	Common Stock (107500)	Direct

Footnotes

F1: Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs vest in 8 equal semi-annual installments with the first installment vesting on November 15, 2021.

F2: Includes 2,300 shares acquired under the Issuer's Employee Stock Purchase Plan ("ESPP") on April 30, 2020 and corrects for 942 shares that were incorrectly previously reported as acquired under the ESPP.

F3: The shares subject to the option vest in 12 equal monthly installments with the first installment vesting on April 17, 2023.

F4: The shares subject to the option vest in 48 equal monthly installments with the first installment vesting on June 15, 2021.