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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

ROSE ERIC A MD 		2. Issuer Name and Ticker or Trading Symbol

SIGA TECHNOLOGIES INC [ SIGA ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Executive Chairman
(Last)          (First)          (Middle)

C/O SIGA TECHNOLOGIES, INC., 27 EAST 62ND STREET 		3. Date of Earliest Transaction (MM/DD/YYYY)

11/13/2017
(Street)

NEW YORK, NY 10065
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   11/13/2017     M    97785   (1) A $3.53   782713   D    
Common Stock, par value $.0001 per share   11/13/2017     F    49446   (2) D $4.47   733267   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 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-Settled Stock Appreciation Rights   $3.53   11/13/2017     M         465000      (3) 2/3/2019   Common Stock, par value $.0001 per share   465000   $0   0   D    

Explanation of Responses:
(1)  This Form 4 reports the exercise of 465,000 stock-settled appreciation rights ("SSARs") for shares of common stock of SIGA Technologies, Inc. (the "Issuer"). Each SSAR consists of the right to receive an amount (the "Excess Amount"), in common stock, equal to the excess of the fair market value of one share of common stock of the Issuer (subject to a cap on the fair market value at $4.50 per share) on the date of exercise over the exercise price of such SSAR. The number of shares of common stock issued was determined by dividing the total of all exercised SSARs by the fair market value of one share of common stock of the Issuer on the date of exercise.
(2)  The Issuer has certain tax withholding obligations associated with the exercise of SSARs and the consequent issuance of common stock of the Issuer. This Form 4 reports the surrender to the Issuer by the Reporting Person of 49,446 shares of common stock otherwise issuable upon the exercise of the SSARs in order to satisfy those withholding tax obligations.
(3)  The SSARs vested in equal yearly installments over a period of three (3) years, with the first 1/3 of such SSARs vesting on February 2, 2013, the second 1/3 of such SSARs vesting on February 2, 2014, and the remaining 1/3 of such SSARs vesting on February 2, 2015.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
ROSE ERIC A MD
C/O SIGA TECHNOLOGIES, INC.
27 EAST 62ND STREET
NEW YORK, NY 10065 		X
Executive Chairman

Signatures
/s/ ROSE ERIC A MD 11/15/2017
** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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