UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934

(Amendment No.    )

Filed by the Registrant  ☑                             Filed by a Party other than the Registrant  ☐

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☐	Preliminary Proxy Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☑	Definitive Additional Materials
☐	Soliciting Material Pursuant to § 240.14a-12

VAXART, INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement if Other Than the Registrant)

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Important Notice of Availability of Proxy Materials for the Stockholder Meeting of VAXART, INC. To Be Held On: April 11, 2018 at 11:00 AM, local time 395 Oyster Point Boulevard Suite 405, South San Francisco, California 94080 COMPANY NUMBER ACCOUNT NUMBER CONTROL NUMBER This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. If you want to receive a paper or e-mail copy of the proxy materials you must request one. There is no charge to you for requesting a copy. To facilitate timely delivery please make the request as instructed below before March 30, 2018. Please visit http://www.astproxyportal.com/ast/22033, where the following materials are available for view: • Notice of Annual Meeting of Stockholders • Proxy Statement • Form of Electronic Proxy Card • Annual Report TO REQUEST MATERIAL: TELEPHONE: 888-Proxy-NA (888-776-9962) or 718-921-8562 (for international callers) E-MAIL: info@astfinancial.com WEBSITE: https://us.astfinancial.com/OnlineProxyVoting/ProxyVoting/RequestMaterials TO VOTE: ONLINE: To access your online proxy card, please visit www.voteproxy.com and follow the on-screen instructions or scan the QR code with your smartphone. You may enter your voting instructions at www.voteproxy.com up until 11:59 PM Eastern Time on April 10, 2018. IN PERSON: You may vote your shares in person by attending the Annual Meeting. TELEPHONE: To vote by telephone, please visit www.voteproxy.com to view the materials and to obtain the toll free number to call. MAIL: You may request a card by following the instructions above. 1. To elect the Board’s seven nominees for director to serve until the 2019 Annual Meeting of stockholders or until their successors are duly elected and qualified. NOMINEES: Geoffrey F. Cox, Ph.D John P. Richard Anne M. VanLent Wouter W. Latour, M.D. Michael J. Finney, Ph.D Jan Leschly Richard J. Markham 2. To ratify the selection by our Audit Committee of KPMG LLP as our independent registered public accounting firm for the year ending December 31, 2018. 3. To approve, on an advisory basis, the compensation of the former Aviragen named executive officers. 4. To conduct any other business properly brought before the meeting. Please note that you cannot use this notice to vote by mail.