X0306 4/A 2019-12-12 2019-12-16 0 0001000694 NOVAVAX INC NVAX 0001219864 YOUNG JAMES F C/O NOVAVAX, INC. 21 FIRSTFIELD ROAD GAITHERSBURG MD 20878 1 0 0 0 Stock Option (Right to buy) 3.99 2019-12-12 4 A 0 37500 0.00 A 2020-12-12 2029-12-12 Common Stock 37500 37500 D The Reporting Person is amending the Form 4 originally filed solely to correct the number of stock options to purchase common stock of Novavax, Inc. (the "Company") acquired by the Reporting Person on December 12, 2019 under the Company's Amended and Restated 2015 Stock Incentive Plan, as amended (the "2015 Stock Plan"), and the related number of stock options beneficially owned following the reported transaction, due to an inadvertent error. One hundred percent (100%) of the shares subject to this option grant under the Company's 2015 Stock Plan will vest one (1) year from the December 12, 2019 grant date subject to continued service on the Company's Board of Directors through the vesting date. /s/ John A. Herrmann III, Attorney-in-Fact 2020-03-24