Sec Form 4 Filing - Tucker Sean @ Vaxart, Inc. - 2018-02-13

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Tucker Sean 2. Issuer Name and Ticker or Trading Symbol Vaxart, Inc. [ VXRT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Scientific Officer (Last) (First) (Middle) 395 OYSTER POINT BLVD, SUITE 405 3. Date of Earliest Transaction (MM/DD/YY) 02/13/2018 (Street) SOUTH SAN FRANCISCO, CA94080 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/13/2018 A 45,640 A 45,640 D Common Stock 02/13/2018 A 9,060 A 9,060 I By spouse Common Stock 02/13/2018 A 25,388 A 25,388 I By joint trust with Frances Chang and Sean Tucker

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option (right to buy) $ 6.49 02/13/2018 A( 1 ) 2,014 ( 2 ) 03/13/2018 Common Stock 2,014 ( 2 ) 2,014 D Stock Option (right to buy) $ 6.49 02/13/2018 A( 1 ) 4,027 ( 3 ) 08/27/2020 Common Stock 4,027 ( 3 ) 4,027 D Stock Option (right to buy) $ 6.49 02/13/2018 A( 1 ) 1,006 ( 4 ) 03/30/2021 Common Stock 1,006 ( 4 ) 1,006 D Stock Option (right to buy) $ 8.03 02/13/2018 A( 1 ) 3,020 ( 5 ) 04/13/2022 Common Stock 3,020 ( 5 ) 3,020 D Stock Option (right to buy) $ 6.49 02/13/2018 A( 1 ) 10,523 ( 6 ) 08/08/2023 Common Stock 10,523 ( 6 ) 10,523 D Stock Option (right to buy) $ 8.03 02/13/2018 A( 1 ) 11,604 ( 7 ) 05/08/2024 Common Stock 11,604 ( 7 ) 11,604 D Stock Option (right to buy) $ 17.49 02/13/2018 A( 1 ) 10,067 ( 8 ) 07/23/2025 Common Stock 10,067 ( 8 ) 10,067 D Stock Optin (right to buy) $ 12.98 02/13/2018 A( 1 ) 7,731 ( 9 ) 03/25/2026 Common Stock 7,731 ( 9 ) 7,731 D Stock Optin (right to buy) $ 4.07 02/13/2018 A( 1 ) 9,060 ( 10 ) 06/24/2027 Common Stock 9,060 ( 10 ) 9,060 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Tucker Sean 395 OYSTER POINT BLVD, SUITE 405 SOUTH SAN FRANCISCO, CA94080 Chief Scientific Officer Signatures /s/ Wouter W. Latour, M.D., Attorney-in-Fact 02/15/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares of common stock of the corporation then known as Vaxart Biosciences, Inc. ("Old Vaxart") were converted into shares of the Issuer pursuant to that certain Agreement and Plan of Merger and Reorganization, dated as of October 27, 2017, by and among the Issuer, Agora Merger Sub, Inc. and Old Vaxart (the "Merger Agreement"). Pursuant to the terms of the Merger Agreement, each share of common stock was converted into approximately 0.221 shares of the Issuer's common stock. Following the merger, the Issuer effected a reverse stock split at a ratio of one new share for every 11 shares of common stock outstanding (the "Stock Split"). ( 2 )On March 13, 2008, Reporting Person was granted an option to purchase 100,000 shares of the common stock of Old Vaxart under Old Vaxart's Amended and Restated 2007 Equity Incentive Plan (the "Plan") at an exercise price of $0.13 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 2,014 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $6.49 (as adjusted for the Stock Split). This option is fully vested. ( 3 )On August 27, 2010, Reporting Person was granted an option to purchase 200,000 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.13 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 4,027 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $6.49 (as adjusted for the Stock Split). This option is fully vested. ( 4 )On March 30, 2011, Reporting Person was granted an option to purchase 50,000 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.13 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 1,006 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $6.49 (as adjusted for the Stock Split). This option is fully vested. ( 5 )On April 13, 2012, Reporting Person was granted an option to purchase 150,000 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.16 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 3,020 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $8.03 (as adjusted for the Stock Split). This option is fully vested. ( 6 )On August 8, 2013, Reporting Person was granted an option to purchase 522,676 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.13 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 10,523 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $6.49 (as adjusted for the Stock Split). This option is fully vested. ( 7 )On May 8, 2014, Reporting Person was granted an option to purchase 576,338 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.16 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 11,604 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $8.03 (as adjusted for the Stock Split). This option is fully vested. ( 8 )On July 23, 2015, Reporting Person was granted an option to purchase 500,000 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.35 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 10,067 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $17.49 (as adjusted for the Stock Split). The option vests in 48 equal monthly installments beginning from July 1, 2015. ( 9 )On March 25, 2016, Reporting Person was granted an option to purchase 384,000 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.26 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 7,731 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $12.98 (as adjusted for the Stock Split). The option vests in 48 equal monthly installments beginning from March 25, 2016. ( 10 )On June 24, 2017, Reporting Person was granted an option to purchase 450,000 shares of the common stock of Old Vaxart under the Plan at an exercise price of $0.08 per share. Pursuant to the Merger Agreement, this option was converted into an option to purchase 9,060 shares of the Issuer's common stock (as adjusted for the Stock Split) at a per share exercise price of $4.07 (as adjusted for the Stock Split). The option vests with respect to 25% of the underlying shares on the first anniversary of the vesting commencement date of June 14, 2017 and with respect to the remaining shares underlying the option in 36 equal monthly installments thereafter.

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