X0306 4 2022-12-14 0 0001000694 NOVAVAX INC NVAX 0001610928 Herrmann John A III C/O NOVAVAX, INC. 21 FIRSTFIELD ROAD GAITHERSBURG MD 20878 0 1 0 0 EVP, Chief Legal Officer Common Stock 2022-12-14 4 M 0 2100 A 9149 D Common Stock 2022-12-14 4 F 0 700 17.23 D 8449 D Common Stock 3384 I By spouse Restricted Stock Units 2022-12-14 4 M 0 2100 0.00 D Common Stock 2100 2100 D The shares were received by the Reporting Person in connection with vesting of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Novavax, Inc. (the "Company") common stock. The shares were withheld by the Company to satisfy tax withholding obligations in connection with the vesting of RSUs. The shares reported on this Form 4 are subject to a lock-up agreement between the Reporting Person, J.P. Morgan Securities LLC and Jefferies LLC, dated December 14, 2022. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. The RSUs subject to this grant under the Company's Amended and Restated 2015 Stock Incentive Plan, as amended, vested or will vest with respect to one-third (1/3) of the RSUs on each of the first three (3) anniversaries of the December 14, 2020 grant date, in each case subject to continued employment through such vesting date. /s/ John A. Herrmann III 2022-12-16