Rose Eric A MD Form 4 SIGA / ERIC A MD ROSE ownership change

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

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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^*

ROSE ERIC A MD

(Last) (First) (Middle)

C/O SIGA TECHNOLOGIES,INC.,

660 MADISON AVENUE, SUITE 1700

(Street)

NEW YORK NY 10065

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SIGA TECHNOLOGIES INC [ SIGAQ ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/22/2015

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
Common Stock, par value $.0001 per share	09/22/2015		M		16,667	A	$0	569,564	D
Common Stock, par value $.0001 per share	09/22/2015		M		16,666	A	$0	586,230	D
Common Stock, par value $.0001 per share	09/22/2015		M		16,667	A	$0	602,897	D
Common Stock, par value $.0001 per share	09/24/2015		S		20,000(1)	D	$1.21	582,897	D

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
Restricted Stock Units	(2)	09/22/2015		M			16,667	(2)	(2)	Common Stock, par value $.0001 per share	16,667	$0	0	D
Restricted Stock Units	(3)	09/22/2015		M			16,666	(3)	(3)	Common Stock, par value $.0001 per share	16,666	$0	66,667	D
Restricted Stock Units	(4)	09/22/2015		M			16,667	(4)	(4)	Common Stock, par value $.0001 per share	16,667	$0	133,335	D

Explanation of Responses:

1. The Reporting Person is obligated to fund certain tax withholding obligations of SIGA Technologies, Inc. (the "Issuer") arising from the expected receipt of shares of Common Stock of the Issuer by the Reporting Person in connection with the vesting of restricted stock units and the subsequent delivery of shares of Common Stock in connection therewith. This Form 4 reports the sale by the Reporting Person of 20,000 shares of Common Stock, which shares of Common Stock were sold to raise the funds required to satisfy such withholding tax obligations.

2. Represents vesting and conversion of certain RSUs granted on February 28, 2012. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

3. Represents vesting and conversion of certain RSUs granted on January 3, 2013. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

4. Represents vesting and conversion of certain RSUs granted on January 3, 2014. Each RSU converts into one share of Common Stock of the Issuer on a one for one basis.

Remarks:

	/s/ ERIC A. ROSE, MD	09/24/2015
	** 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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