SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

KLASKIN CHRISTINE M

(Last)

(First)

(Middle)

162 FIFTH AVE.

SUITE 900

(Street)

NEW YORK

10010

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
10/01/2006

3. Issuer Name and Ticker or Trading Symbol
ANTIGENICS INC /DE/ [ AGEN ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	VP, Finance

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	2,291	D
Common Stock	195	I	by husband

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Stock Option, right to buy	01/01/1999⁽¹⁰⁾	01/01/2008	Common Stock	9,633	$6.5	D
Stock Option, right to buy	02/04/2001	02/04/2010	Common Stock	1,000	$13.5	D
Stock Option, right to buy	01/15/2003⁽¹⁾	01/15/2012	Common Stock	1,000	$14.52	D
Stock Option, right to buy	06/07/2003⁽²⁾	06/07/2012	Common Stock	5,000	$9	D
Stock Option, right to buy	02/11/2004⁽³⁾	02/11/2013	Common Stock	5,000	$8.99	D
Stock Option, right to buy	02/18/2005⁽⁴⁾	02/18/2014	Common Stock	6,800	$10.36	D
Stock Option, right to buy	03/07/2006⁽⁵⁾	03/07/2015	Common Stock	7,500	$6.3	D
Stock Option, right to buy	03/22/2007⁽⁶⁾	03/22/2016	Common Stock	10,000	$5.13	D
Stock Option, right to buy	09/13/2007⁽⁷⁾	09/13/2016	Common Stock	30,000	$1.74	D
Stock Option, right to buy	09/15/2007⁽⁸⁾	09/15/2016	Common Stock	15,311	$1.63	D
Restricted stock	03/22/2007⁽⁹⁾	03/22/2008	Common Stock	1,500	$0	D

Explanation of Responses:

1. Options vest in five equal annual installments beginning January 15, 2003.

2. Options vest in five equal annual installments beginning June 7, 2003.

3. Options vest in five equal annual installments beginning February 11, 2004.

4. Options vest in four equal annual installments beginning February 18, 2005.

5. Options vest in four equal annual installments beginning March 7, 2006.

6. Options vest in three equal annual installments beginning March 22, 2007.

7. Options vest in four equal annual installments beginning September 13, 2007.

8. Options vest 33% on September 15, 2007 and 67% on September 15, 2008.

9. Restricted Stock granted in accordance with the terms of the Antigenics Inc. 1999 Equity Incentive Plan, as amended, and vests one-third on March 22, 2007 and two-thirds on March 22, 2008.

10. Options vest in five equal annual installments beginning January 1, 1999.

	Christine M. Klaskin	02/12/2008
	** 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 5 (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.
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