NOVAVAX INC

Adoption of 10b5-1 Trading Plans by our Officers and Directors

During our fiscal quarter ended December 31, 2023, one of our officers (as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) entered into a contract, instruction or written plan for the purchase or sale of our securities that is intended to satisfy the conditions specified in Rule 10b5-1(c) under the Exchange Act for an affirmative defense against liability for trading in securities on the basis of material nonpublic information. We refer to this contract, instruction, and written plan as a “Rule 10b5-1 trading plan.” We describe the material terms of this Rule 10b5-1 trading plan below.

Filip Dubovsky, MD, President, Research & Development

On December 12, 2023, Filip Dubovsky, MD, our President, Research & Development, entered into a Rule 10b5-1 trading plan that is intended to satisfy the affirmative defense of Rule 10b5-1(c) and provides that Dr. Dubovsky, acting through a broker, may sell up to an aggregate of 13,365 shares of our common stock, subject to adjustments for stock splits, stock combinations, stock dividends and other similar changes to our common stock. Sales of shares under the plan may only occur from March 15, 2024 to June 14, 2024. The plan is scheduled to terminate on June 14, 2024, subject to earlier termination upon the sale of all shares subject to the plan or the expiration of all sale orders under the plan, upon termination by Dr. Dubovsky or the broker, or as otherwise provided in the plan.