UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.     )
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Investment Technology Group, Inc.
(Name of Registrant as Specified In Its Charter)
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*** Exercise Your Right to Vote *** Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting to Be Held on June 7, 2018. INVESTMENT TECHNOLOGY GROUP, INC. XXXX XXXX XXXX XXXX (located on the following page). You are receiving this communication because you hold shares in the company named above. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting. ONE LIBERTY PLAZA 165 BROADWAY NEW YORK, NEW YORK 10006 proxy materials and voting instructions. E45642-P07494 See the reverse side of this notice to obtain Meeting Information Meeting Type: Annual Meeting For holders as of: April 13, 2018 Date: June 7, 2018 Time: 11:30 AM Location: Meeting live via the Internet-please visit www.virtualshareholdermeeting.com/ITG2018 The company will be hosting the meeting live via the Internet this year. To attend the meeting via the Internet please visit www.virtualshareholdermeeting.com/ITG2018 and be sure to have the information that is printed in the box marked by the arrow

Before You Vote How to Access the Proxy Materials Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (located on the by the arrow XXXX XXXX XXXX XXXX (located on the following page) in the subject line. How To Vote Please Choose One of the Following Voting Methods XXXX XXXX XXXX XXXX (located on the following page) available and follow the instructions. the arrow XXXX XXXX XXXX XXXX (located on the following page) available and follow the instructions. E45643-P07494 Vote By Internet: Before The Meeting: Go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow During The Meeting: Go to www.virtualshareholdermeeting.com/ITG2018. Have the information that is printed in the box marked by Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card. Proxy Materials Available to VIEW or RECEIVE: NOTICE AND PROXY STATEMENTANNUAL REPORT ON FORM 10-K How to View Online: following page) and visit: www.proxyvote.com. How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request: 1) BY INTERNET:www.proxyvote.com 2) BY TELEPHONE:1-800-579-1639 3) BY E-MAIL*:sendmaterial@proxyvote.com * If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before May 24, 2018 to facilitate timely delivery.

The Board of Directors recommends that you vote FOR each of the following: The Board of Directors recommends you vote FOR the following proposals: 1. Election of Directors Nominees: 2. Advisory Vote to Approve Compensation of Named Executive Officers. Approval of the Investment Technology Group, Inc. Amended and Restated Employee Stock Purchase Plan. 1a. Brian G. Cartwright 3. 1b. Minder Cheng 4. Ratification of the appointment of KPMG LLP as the company's independent registered public accounting firm for the fiscal year ending December 31, 2018. 1c. Timothy L. Jones 1d. R. Jarrett Lilien 1e. Kevin J. Lynch 1f. Lee M. Shavel 1g. Francis J. Troise 1h. Steven S. Wood E45644-P07494 Voting Items

E45645-P07494