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

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * HUCK ANTHONY J   2. Issuer Name and Ticker or Trading Symbol INVESTMENT TECHNOLOGY GROUP INC [ITG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Managing Director (Last) (First) (Middle) C/O ITG INC., 380 MADISON AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 11/23/2005 (Street) NEW YORK, NY 10017 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 11/23/2005   M   25,000 A $ 31.24 67,450 (1) D   Common Stock 11/23/2005   M   1,228 A $ 11.32 68,678 (1) D   Common Stock 11/23/2005   S   25,000 D $ 39.16 43,678 (1) D   Common Stock 11/23/2005   S   1,228 D $ 39.16 42,450 (1) D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	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.		SEC 1474 (9-02)

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

Option (right to buy)

$ 31.24

11/23/2005

M

25,000

(2)

07/01/2007

Common Stock

25,000

(3)

75,000

D

Option (right to buy)

$ 11.32

11/23/2005

M

1,228

(4)

11/02/2007

Common Stock

1,228

(3)

1,228

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HUCK ANTHONY J C/O ITG INC. 380 MADISON AVENUE NEW YORK, NY 10017			Managing Director

Signatures

P. Mats Goebels, by Power of Attorney filed with Form 4 dated October 15, 2002		11/23/2005
**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)	The Amount of Securities Beneficially Owned does not include 248 shares of Common Stock allocated to the Reporting Person under the ESOP trust.
(2)	With respect to the entire class of options: 33,333 became exercisable on 7/1/2004; 33,333 became exercisable on 7/1/2005; 33,334 become exercisable on 7/1/2006.
(3)	Grant of Stock Option.
(4)	With respect to the entire class of options: 2,456 became exercisable on 11/3/1998; 2,456 became exercisable on 11/3/1999; 2,456 became exercisable on 11/3/2000; 2,456 became exercisable on 11/3/2001; 2,456 became exercisable on 11/3/2002.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.