Mark J. Casey - 01 Mar 2026 Form 4 Insider Report for NOVAVAX INC (NVAX)

Reporting relationship: EVP, Chief Legal Officer
Issuer ticker: NVAX
Reported as of: 01 Mar 2026
Net transaction value: +$1,369,370
SEC form: 4
Accepted by SEC: 03 Mar 2026, 21:33:22 UTC
Prior SEC filing: 15 Dec 2025
Next SEC filing: 09 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Mark J. Casey, Attorney-in-Fact

Key filing fact

Mark J. Casey filed Form 4 for NOVAVAX INC (NVAX) on 03 Mar 2026.

Key facts

This page summarizes Mark J. Casey's Form 4 filing for NOVAVAX INC (NVAX).
5 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 03 Mar 2026, 21:33.

Change

Previous filing in this sequence was filed on 15 Dec 2025.
Current net transaction value: +$1,369,370.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001415297 Primary reporting owner

Casey Mark J

Relationship: EVP, Chief Legal Officer
Address: 21 FIRSTFIELD ROAD, GAITHERSBURG
Signature: /s/ Mark J. Casey, Attorney-in-Fact
Signature date: 03 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NVAX transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +4,000
Change %: +6.5%
Price: $0.000000
Shares after: 65,159
Date: 01 Mar 2026
Ownership: Direct

NVAX transaction

Common Stock

Tax liability

Transaction value: $12,310
Shares: -1,214
Change %: -1.9%
Price: $10.14
Shares after: 63,945
Date: 01 Mar 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

NVAX transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -4,000
Change %: -50%
Price: $0.000000
Shares after: 4,000
Date: 01 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,000
Exercise price: $0.000000
Footnotes: F2

NVAX transaction Derivative

Restricted Stock Units

Award

Transaction value: $0
Shares: +101,000
Change %
Price: $0.000000
Shares after: 101,000
Date: 02 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 101,000
Exercise price: $0.000000
Footnotes: F3

NVAX transaction Derivative

Non-Statutory Stock Opotion NQ

Award

Transaction value: $1,381,680
Shares: +152,000
Change %
Price: $9.09
Shares after: 152,000
Date: 02 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 152,000
Exercise price: $9.09
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents the number of shares of common stock withheld by the Company to satisfy tax withholding requirements in connection with the RSU vesting.

Footnote 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 1, 2024, in each case subject to continued employment through such vesting date.

Footnote F3

One-third (1/3) of the RSUs subject to this grant under the Plan vest on each of the first three (3) anniversaries of March 2, 2026, in each case subject to continued employment through such vesting date.

Footnote F4

One quarter (1/4) of the shares subject to this option granted under the Plan vest on the first anniversary of March 2, 2026, and the remaining three-quarters (3/4) of the shares vest in equal monthly installments over the following three (3) years, in each case subject to continued employment with the Company through such vesting date.