X0306 4 2021-12-23 0 0001532346 Atreca, Inc. BCEL 0001230721 CROSS HERB C/O ATRECA, INC., 835 INDUSTRIAL RD. SUITE 400 SAN CARLOS CA 94070 0 1 0 0 Chief Financial Officer Class A Common Stock 42200 D Employee stock option (right to buy) 3.18 2021-12-23 4 A 0 95000 0.00 A 2031-12-22 Class A Common Stock 95000 95000 D 1/48 of the Option vests in equal monthly installments as measured from 12/1/2021. 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. Early Exercise is not permitted. /s/ Courtney Phillips, Attorney-In-Fact 2021-12-28