Mark J. Casey - 03 Mar 2026 Form 4 Insider Report for NOVAVAX INC (NVAX)

Role: EVP, Chief Legal Officer
Signature: /s/ Mark J. Casey, Attorney-in-Fact
Issuer symbol: NVAX
Transactions as of: 03 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 06:01:36 UTC
Previous filing: 09 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Casey Mark J	EVP, Chief Legal Officer	21 FIRSTFIELD ROAD, GAITHERSBURG	/s/ Mark J. Casey, Attorney-in-Fact	05 Mar 2026	0001415297

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	NVAX	Common Stock	Options Exercise		+37,500	+59%	$0.000000^*	101,445	03 Mar 2026	Direct
transaction	NVAX	Common Stock	Tax liability		-11,378	-11%	$9.49^*	90,067	03 Mar 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	NVAX	Restricted Stock Units	Options Exercise		-4,000	-50%	$0.000000^*	4,000	03 Mar 2026	Common Stock	4,000	$0.000000	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the number of shares of common stock withheld by the Company to satisfy tax withholding requirements in connection with the RSU vesting.
F2	One-third (1/3) of the RSUs subject to this grant under the Novavax, Inc. Amended and Restated 2015 Stock Incentive Plan, as amended, (the "Plan") vest on each of the first three (3) anniversaries of March 3, 2025, in each case subject to continued employment through such vesting date.