X0306 4/A 2021-01-05 2021-01-07 0 0001000694 NOVAVAX INC NVAX 0001468534 Trizzino John C/O NOVAVAX, INC. 21 FIRSTFIELD ROAD GAITHERSBURG MD 20878 0 1 0 0 EVP, Chief Commercial Officer Common Stock 2021-01-05 4 F 0 511 116.24 D 866 D The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. The reporting person received 579 shares of common stock upon the net exercise of 1,149 stock appreciation rights. The reporting person forfeited 59 shares of common stock underlying the stock appreciation rights representing the base value and 511 shares of common stock underlying the stock appreciation rights to satisfy the withholding tax obligations resulting from the exercise, using the closing stock price on January 5, 2021 of $116.24. This amendment to the original Form 4 filed on January 7, 2021 is being filed to correct the number of shares reported as forfeited by the reporting person to satisfy withholding tax obligations resulting from the exercise of 1,149 stock appreciation rights on January 5, 2021. /s/ John A. Herrmann III, Attorney-in-Fact 2021-01-27