X0306 4 2023-01-31 0 0001593899 Atea Pharmaceuticals, Inc. AVIR 0001829630 Vavricka John 225 FRANKLIN STREET SUITE 2100 BOSTON MA 02110 0 1 0 0 Chief Commercial Officer Restricted Stock Units 2023-01-31 4 A 0 100000 0.00 A Common Stock 100000 100000 D Stock Option (Right to Buy) 4.63 2023-01-31 4 A 0 140000 0.00 A 2033-01-30 Common Stock 140000 140000 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs vest in three (3) equal annual installments on the first three anniversaries of the grant date such that the RSUs are fully vested on January 31, 2026. The option vests and becomes exercisable in forty-eight (48) equal monthly installments following January 31, 2023 such that the option is fully vested on January 31, 2027. /s/ Andrea Corcoran, as Attorney-in-Fact for John Vavricka 2023-02-02