X0206 3 2019-06-19 0 0001532346 Atreca, Inc. BCEL 0001230721 CROSS HERB C/O ATRECA, INC., 500 SAGINAW DRIVE REDWOOD CITY CA 94063 0 1 0 0 Chief Financial Officer Stock Option (right to buy) 12.06 2029-04-04 Class A Common Stock 224999 D 1/4 of the Option vests on 2/25/2020 and 1/48 of the Option vests in equal monthly installments as measured from 2/25/2020. If applicable, vesting accelerates as provided in, and subject to the terms and conditions of, that certain Executive Employment Agreement between the Issuer and the Reporting Person, as may be amended from time to time. /s/ Michael Tenta, attorney-in-fact 2019-06-19