X0306 4 2021-01-27 0 0001532346 Atreca, Inc. BCEL 0001782758 Courtney Phillips C/O ATRECA, INC., 450 EAST JAMIE COURT SOUTH SAN FRANCISCO CA 94080 0 1 0 0 General Counsel & Secretary Employee stock option (right to buy) 13.97 2021-01-27 4 A 0 80000 0.00 A 2031-01-26 Class A Common Stock 80000 80000 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, Attorney-In-Fact 2021-01-29