X0306 4 2021-10-15 0 0001000694 NOVAVAX INC NVAX 0001342823 Glenn Gregory M C/O NOVAVAX, INC. 21 FIRSTFIELD ROAD GAITHERSBURG MD 20878 0 1 0 0 President, R&D Common Stock 2021-10-15 4 M 0 521 27.60 A 4582 D Common Stock 2021-10-15 4 M 0 662 46.00 A 5244 D Common Stock 2021-10-15 4 S 0 1183 170.00 D 4061 D Stock Option (Right to Buy) 27.60 2021-10-15 4 M 0 521 0.00 D 2027-12-15 Common Stock 521 1545 D Stock Option (Right to Buy) 46.00 2021-10-15 4 M 0 662 0.00 D 2028-12-13 Common Stock 662 9268 D The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Twenty-five percent (25%) of the shares subject to this option grant under the Novavax, Inc. Amended and Restated 2015 Stock Incentive Plan, as amended (the "Plan") vested on the first anniversary of the December 15, 2017 grant date, and the remaining seventy-five percent (75%) of the shares vested or will vest in equal monthly installments over the following three (3) years subject to continued employment through such vesting date. Twenty-five percent (25%) of the shares subject to this option grant under the Plan vested on the first anniversary of the December 13, 2018 grant date, and the remaining seventy-five percent (75%) of the shares vested or will vest in equal monthly installments over the following three (3) years subject to continued employment through such vesting date. /s/ John A. Herrmann III, Attorney-in-Fact 2021-10-19