X0306 4 2021-08-31 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 2021-08-31 4 S 0 53 234.6394 D 5394 D Common Stock 2021-08-31 4 S 0 108 237.1351 D 5286 D Common Stock 2021-08-31 4 S 0 320 238.7224 D 4966 D Common Stock 2021-08-31 4 S 0 359 239.6624 D 4607 D Common Stock 2021-08-31 4 S 0 175 240.5834 D 4432 D Common Stock 2021-08-31 4 S 0 209 241.5874 D 4223 D Common Stock 2021-08-31 4 S 0 100 242.6265 D 4123 D Common Stock 2021-08-31 4 S 0 62 244.025 D 4061 D The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $234.51 to $235.00, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $236.65 to $237.44, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $238.08 to $239.00, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $239.12 to $239.90, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $240.18 to $241.10, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $241.22 to $242.04, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $242.29 to $243.02, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $243.83 to $244.22, inclusive. The reporting person undertakes to provide to Novavax, Inc., any security holder of Novavax, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. /s/ John A. Herrmann III, Attorney-in-Fact 2021-09-01