Vaxart, Inc.

Important Additional Information and Where to Find It

Vaxart intends to file a preliminary proxy statement and a white proxy card with the U.S. Securities and Exchange Commission (the “SEC”) in connection with its solicitation of proxies for the 2026 Annual Meeting of Stockholders (the “Annual Meeting”).**STOCKHOLDERS OF THE COMPANY ARE STRONGLY ENCOURAGED TO READ SUCH PROXY STATEMENT (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO), THE ACCOMPANYING WHITE PROXY CARD AND ALL OTHER DOCUMENTS FILED WITH, OR FURNISHED TO, THE SEC IN CONNECTION WITH THE ANNUAL MEETING CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE AS THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE ANNUAL MEETING.**Stockholders will be able to obtain the Company’s proxy statement, any amendments or supplements to the proxy statement and other documents filed by the Company with the SEC at no charge at the SEC’s website at www.sec.gov. Copies will also be available at no charge at the Company’s website at https://investors.vaxart.com/financials-filings/sec-filings.