FORM 4
[ X ] 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 *

BOESS CARSTEN 		2. Issuer Name and Ticker or Trading Symbol

SYNAGEVA BIOPHARMA CORP [ GEVA ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
SVP, Chief Financial Officer
(Last)          (First)          (Middle)

33 HAYDEN AVE 		3. Date of Earliest Transaction (MM/DD/YYYY)

6/22/2015
(Street)

LEXINGTON, MA 02421
(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   6/22/2015     D    24000   (1) D   (2) 0   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 Options (Right to Buy)   $1.70   6/22/2015     D         9929      (3) 5/25/2021   Common Stock   9929   $0.00   0   D    
Stock Options (Right to Buy)   $23.00   6/22/2015     D         7292      (4) 12/20/2021   Common Stock   7292   $0.00   0   D    
Stock Options (Right to Buy)   $40.32   6/22/2015     D         45000      (5) 6/6/2023   Common Stock   45000   $0.00   0   D    
Stock Options (Right to Buy)   $40.74   6/22/2015     D         15938      (6) 6/27/2022   Common Stock   15938   $0.00   0   D    
Stock Options (Right to Buy)   $80.35   6/22/2015     D         40000      (7) 6/4/2024   Common Stock   40000   $0.00   0   D    

Explanation of Responses:
( 1)  Represents shares issuable pursuant to a Restricted Stock Unit Award ("RSU"), which vest (x) 25% on June 5, 2015 and (y) 12.5% per six months thereafter.
( 2)  Pursuant to the Merger Agreement, (i) 12,000 RSUs were accelerated and cancelled in exchange for the Transaction Consideration and (ii) 12,000 RSUs were cancelled and converted into a number of restricted stock units of Parent common stock, based on a conversion ratio which vest on the same schedule as the RSUs.
( 3)  Pursuant to the Merger Agreement, these options, which vest 25% on 05/16/2012 and 1/36 of the remainder of the shares vest and become exercisable monthly thereafter, accelerated, became fully vested and were cancelled pursuant to the Merger Agreement in exchange for an amount in cash and shares of Alexion common stock equal to (i) the Transaction Consideration multiplied by (ii) a number of shares of Synageva common stock equal to (1) $230.00 minus the per share exercise price , divided by (2) $230.00, with the cash portion of such amount rounded down to the nearest cent and with the portion of such amount payable in shares of Parent common stock rounded down to the nearest one thousandth of a share.
( 4)  Pursuant to the Merger Agreement, these options, which vest 25% on 05/25/2012 and 1/36 of the remainder of the shares vest and become exercisable monthly thereafter, accelerated, became fully vested and were cancelled pursuant to the Merger Agreement in exchange for an amount in cash and shares of Alexion common stock equal to (i) the Transaction Consideration multiplied by (ii) a number of shares of Synageva common stock equal to (1) $230.00 minus the per share exercise price , divided by (2) $230.00, with the cash portion of such amount rounded down to the nearest cent and with the portion of such amount payable in shares of Parent common stock rounded down to the nearest one thousandth of a share.
( 5)  Pursuant to the Merger Agreement, these options, which vest 25% on 06/06/2014 and 1/36 of the remainder of the shares vest and become exercisable monthly thereafter, accelerated, became fully vested and were cancelled pursuant to the Merger Agreement in exchange for an amount in cash and shares of Alexion common stock equal to (i) the Transaction Consideration multiplied by (ii) a number of shares of Synageva common stock equal to (1) $230.00 minus the per share exercise price , divided by (2) $230.00, with the cash portion of such amount rounded down to the nearest cent and with the portion of such amount payable in shares of Parent common stock rounded down to the nearest one thousandth of a share.
( 6)  Pursuant to the Merger Agreement, these options, which vest 25% on 06/27/2013 and 1/36 of the remainder of the shares vest and become exercisable monthly thereafter, accelerated, became fully vested and were cancelled pursuant to the Merger Agreement in exchange for an amount in cash and shares of Alexion common stock equal to (i) the Transaction Consideration multiplied by (ii) a number of shares of Synageva common stock equal to (1) $230.00 minus the per share exercise price , divided by (2) $230.00, with the cash portion of such amount rounded down to the nearest cent and with the portion of such amount payable in shares of Parent common stock rounded down to the nearest one thousandth of a share.
( 7)  Pursuant to the Merger Agreement, these options, which vest 25% on 06/04/2015 and 1/36 of the remainder of the shares vest and become exercisable monthly thereafter, accelerated, became fully vested and were cancelled pursuant to the Merger Agreement in exchange for an amount in cash and shares of Alexion common stock equal to (i) the Transaction Consideration multiplied by (ii) a number of shares of Synageva common stock equal to (1) $230.00 minus the per share exercise price , divided by (2) $230.00, with the cash portion of such amount rounded down to the nearest cent and with the portion of such amount payable in shares of Parent common stock rounded down to the nearest one thousandth of a share.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
BOESS CARSTEN
33 HAYDEN AVE
LEXINGTON, MA 02421

SVP, Chief Financial Officer

Signatures
/s/ Chris Heberlig, Attorney-in-fact 6/23/2015
** 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).
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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