Sec Form 4 Filing - Novartis Bioventures Ltd @ Altimmune, Inc. - 2018-06-15

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 Novartis Bioventures Ltd 2. Issuer Name and Ticker or Trading Symbol Altimmune, Inc. [ ALT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O NOVARTIS INTERNATIONAL AG, LICHTSTRASSE 35 3. Date of Earliest Transaction (MM/DD/YY) 06/15/2018 (Street) BASEL, V8CH-4056 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ 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, par value $0.0001 06/15/2018 J( 1 ) 14,449 A 5,611,806 I See Footnote ( 2 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Novarti s Bioventures Ltd C/O NOVARTIS INTERNATIONAL AG LICHTSTRASSE 35 BASEL, V8CH-4056 X NOVARTIS AG C/O NOVARTIS INTERNATIONAL AG LICHTSTRASSE 35 BASEL, V8CH-4056 X Signatures /s/ Bart Dzikowski, Secretary of the Board of Novartis Bioventures Ltd 06/19/2018 Signature of Reporting Person Date /s/ Anja Koenig, Authorized Signatory of Novartis Bioventures Ltd 06/19/2018 Signature of Reporting Person Date /s/ Bart Dzikowski, Authorized Signatory of Novartis AG 06/19/2018 Signature of Reporting Person Date /s/ Anja Koenig, Authorized Signatory of Novartis AG 06/19/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the terms of the Series B Convertible Preferred Stock (the "Preferred Stock"), the Issuer converted the Preferred Stock into shares of the Issuer's common stock, par value $0.0001 per share (the "Common Stock") at the installment conversion price of $0.4410 per share of Common Stock. ( 2 )The board of directors of Novartis Bioventures Ltd has sole voting and investment control and power over such securities. None of the members of its board of directors has individual voting or investment power with respect to such securities and each disclaims beneficial ownership of such securities. Novartis Bioventures Ltd is an indirectly owned subsidiary of Novartis AG.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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