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 *
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)
_____ Director _____ 10% Owner
_____ 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 (Month/Day/Year)
11/13/2017
(Street)

NEW YORK, NY 10065
4. If Amendment, Date 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
(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 $.0001 per share 11/13/2017   M   97,785 (1) A $ 3.53 782,713 D  
Common Stock, par value $.0001 per share 11/13/2017   F   49,446 (2) D $ 4.47 733,267 D  

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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
Stock-Settled Stock Appreciation Rights $ 3.53 11/13/2017   M     465,000   (3) 02/03/2019 Common Stock, par value $.0001 per share 465,000 $ 0 0 D  

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
      Executive Chairman  

Signatures

 /s/ ROSE ERIC A MD   11/15/2017
**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) 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.

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