Ownership Submission
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 OF SECURITIES

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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(Print or Type Responses)
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 (Month/Day/Year)
05/15/2018
(Street)

BASEL, V8 CH-4056		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 05/15/2018   J(1)   274,703 A (1) 4,108,751 I See Footnote (2)
Common Stock, par value $0.0001 05/16/2018   J(3)   767,728 A (3) 4,876,479 I See Footnote (2)

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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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
Series B Convertible Preferred Stock $ 2.67 (4) 05/16/2018   J(3)     344.9398 08/21/2017 08/15/2018 Common Stock, par value $0.0001 129,188 (3) 689.8685 I See Footnote (2)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Novartis Bioventures Ltd
C/O NOVARTIS INTERNATIONAL AG
LICHTSTRASSE 35
BASEL, V8 CH-4056		     X    
NOVARTIS AG
C/O NOVARTIS INTERNATIONAL AG
LICHTSTRASSE 35
BASEL, V8 CH-4056		     X    

Signatures

 /s/ Bart Dzikowski, Secretary of the Board of Novartis Bioventures Ltd   05/17/2018
**Signature of Reporting Person Date
 /s/ Stephan Sandmeier, Authorized Signatory of Novartis Bioventures Ltd   05/17/2018
**Signature of Reporting Person Date
 /s/ Bart Dzikowski, Authorized Signatory of Novartis AG   05/17/2018
**Signature of Reporting Person Date
 /s/ Stephan Sandmeier, Authorized Signatory of Novartis AG   05/17/2018
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(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 $0.4553 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.
(3) 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 $0.4493 per share of Common Stock.
(4) The Issuer's Preferred Stock is convertible at any time at the option of the holder into shares of the Issuer's Common Stock, subject to certain restrictions, at an initial conversion price of $2.67 per share and a stated amount of $1,000 per share.

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