SEC Form 4

FORM 4		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 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Roberts M Scot (Last) (First) (Middle) 19 FIRSTFIELD ROAD, SUITE 200 (Street) GAITHERSBURG MD 20878 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Altimmune, Inc. [ NASDAQ:ALT ]	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
	3. Date of Earliest Transaction (Month/Day/Year) 05/04/2017
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

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

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 Securities Underlying Derivative Security (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: 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 (option to buy)	$0.08	05/04/2017		A		55,120		05/04/2017	12/05/2022	Common Stock, par value $0.0001	55,120	(1)	55,120	D
Stock Option (option to buy)	$0.59	05/04/2017		A		8,956		(2)	12/04/2023	Common Stock, par value $0.0001	8,956	(1)	8,956	D
Stock Option (option to buy)	$2.59	05/04/2017		A		8,956		(3)	12/02/2024	Common Stock, par value $0.0001	8,956	(1)	8,956	D
Stock Option (option to buy)	$13.38	05/04/2017		A		11,235		(4)	04/07/2026	Common Stock, par value $0.0001	11,235	(1)	11,235	D

Explanation of Responses:

1. Acquired pursuant to the Agreement and Plan of Merger, dated as of January 18, 2017 (as amended on March 29, 2017, the "Merger Agreement"), pursuant to which a wholly-owned subsidiary of the Issuer merged with and into Altimmune, Inc. ("Altimmune"). Pursuant to the Merger Agreement the Issuer assumed all outstanding options to purchase shares of Altimmune capital stock on a 0.749106:1 basis upon closing of the merger.

2. The option is currently exercisable to purchase 6,716 shares of the Issuer's common stock, par value $0.0001 ("Common Stock"). The remaining portion of the option will vest on 12/4/2017.

3. The option is currently exercisable to purchase 4,477 shares of Common Stock. An additional 25% of the option will vest on each of 12/3/2017 and 12/3/2018.

4. The option is currently exercisable to purchase 2,809 shares of Common Stock. An additional 25% of the option will vest on each of 3/2/2018, 3/2/2019, and 3/2/2020.

Remarks:

	/s/ Ori Solomon, Attorney in fact for M. Scot Roberts	05/08/2017
	** Signature of Reporting Person	Date
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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