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 *
Valentine Karen
   2. Issuer Name and Ticker or Trading Symbol
ANTIGENICS INC /DE/ [AGEN] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP and General Counsel
(Last)
(First)
(Middle)
C/O ANTIGENICS INC., 3 FORBES RD		 3. Date of Earliest Transaction (Month/Day/Year)
07/15/2009
(Street)

LEXINGTON, MA 02421		 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 07/14/2009   A(1) V 67,300 A (1) 101,974 D  
Common Stock 07/15/2009   S(2)   7,753 D $ 1.763 94,221 D  
Common Stock 07/16/2009   S(2)   15,930 D $ 1.618 78,291 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 Option, right to buy $ 10.17 07/16/2009   J(3)     15,000   (3) 07/16/2009 Common Stock 15,000 $ 10.17 173,900 D  
Stock Option, right to buy $ 6.3 07/16/2009   J(3)     7,500   (3) 07/16/2009 Common Stock 7,500 $ 6.3 166,400 D  
Stock Option, right to buy $ 4.76 07/16/2009   J(3)     7,500   (3) 07/16/2009 Common Stock 7,500 $ 4.76 158,900 D  
Stock Option, right to buy $ 5.13 07/16/2009   J(3)     7,500   (3) 07/16/2009 Common Stock 7,500 $ 5.13 151,400 D  
Stock Option, right to buy $ 1.58 07/16/2009   A   28,125   10/16/2009(4) 07/16/2019 Common Stock 28,125 $ 1.58 179,525 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Valentine Karen
C/O ANTIGENICS INC.
3 FORBES RD
LEXINGTON, MA 02421		       VP and General Counsel  

Signatures

 Christine M. Klaskin, by Power of Attorney   07/17/2009
**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) Represents settlement of restricted stock which was granted on January 14, 2009 in lieu of an annual cash bonus for 2008 performance.
(2) Represents exclusively, shares sold to cover minimum federal, state and local tax wihthholding requirements upon the vesting of the restricted shares granted in lieu of a cash bonus for 2008 performance.
(3) Options cancelled pursuant to the terms of the offer by Antigenics Inc. to exchange certain outstanding options granted under the Antigenics 1999 Equity Incentive Plan, as amended for options to be granted under the 2009 Equity Incentive Plan.
(4) Options vest in 6 equal quarterly installments over an 18 month period beginning October 16, 2009.

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