X0306 4 2021-01-27 0 0001532346 Atreca, Inc. BCEL 0001230721 CROSS HERB C/O ATRECA, INC., 450 EAST JAMIE COURT SOUTH SAN FRANCISCO CA 94080 0 1 0 0 Chief Financial Officer Employee stock option (right to buy) 13.97 2021-01-27 4 A 0 95000 0.00 A 2031-01-26 Class A Common Stock 95000 95000 D 1/48 of the Option vests in equal monthly installments as measured from 1/1/2021. 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/ Herbert Cross 2021-01-29