Exhibit 99.1

FOR IMMEDIATE RELEASE

ITG Releases April 2009 US Trading Volumes

NEW YORK, NY, May 8, 2009 — Investment Technology Group, Inc. (NYSE: ITG), a leading agency broker and financial technology firm, today announced that April 2009 US trading volume was 4.1 billion shares and average daily volume (ADV) was 197 million shares. This compares to 5.1 billion shares and ADV of 231 million shares in March 2009 and 3.9 billion shares and ADV of 179 million shares in April 2008.

There were 21 trading days in April 2009 and 22 trading days in both March 2009 and April 2008.

Monthly volume statistics reflect commission-generating US volume.  These statistics are preliminary and may be revised in subsequent updates and public filings.  Volume statistics are posted on ITG’s website, www.itg.com, and are available via a downloadable spreadsheet file.

ITG US Trading Activity

Total US  Shares	# of  Trade  Days	Total US  Volume	Average US  Daily  Volume
April:	21	4,132,891,073	196,804,337
Year-to-Date:	82	17,237,659,304	210,215,357

ABOUT ITG

Investment Technology Group, Inc., is a specialized agency brokerage and financial technology firm that partners with asset managers globally to provide innovative solutions spanning the investment continuum. A leader in electronic trading since launching POSIT in 1987, ITG’s integrated approach now includes a range of products from portfolio management and pre-trade analysis to trade execution and post-trade

evaluation. Asset managers rely on ITG’s independence, experience, and agility to help mitigate risk, improve performance and navigate increasingly complex markets.  The firm is headquartered in New York with offices in North America, Europe and the Asia Pacific region. For more information on ITG, please visit www.itg.com.

ITG Contact:

Ken Kraft

(212) 444-6245

###