X0206 3 2022-02-17 0 0001527753 Personalis, Inc. PSNL 0001915342 Moore Stephen Michael C/O PERSONALIS, INC. 1330 O'BRIEN DRIVE MENLO PARK CA 94025 0 1 0 0 General Counsel Common Stock 45639 D Common Stock 11475 D Common Stock 25000 D Stock Option (Right to Buy) 10.81 2021-04-29 2030-04-29 Common Stock 100000 D Stock Option (Right to Buy) 19.74 2021-06-15 2031-05-15 Common Stock 25000 D 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 shall vest in annual installments over four years with the first installment vesting on April 29, 2021. 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 shall vest in semi-annual installments over four years with the first installment vesting on November 15, 2021. 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 shall vest in semi-annual installments over three years with the first installment vesting on June 14, 2022. The shares subject to the option vest as to 25% shares underlying the option vest on April 29, 2021 and 1/48th of the total shares underlying the option vest in 36 equal monthly installments thereafter. The shares subject to the option vest in 48 equal monthly installments with the first installment vesting on June 15, 2021. /s/ Aaron Tachibana, Attorney-in-Fact 2022-03-08