ITG RELEASES JULY 2009 US TRADING VOLUMES

NEW YORK, August 10, 2009 — Investment Technology Group, Inc. (NYSE: ITG), a leading agency broker and financial technology firm, today announced that July 2009 US trading volume was 4.1 billion shares and average daily volume (ADV) was 186 million shares. This compares to 4.0 billion shares and ADV of 182 million shares in June 2009 and 5.0 billion shares and ADV of 226 million shares in July 2008.

There were 22 trading days each in July 2009, June 2009 and July 2008.

ITG US Trading Activity

Total US Shares	# of Trade Days	Total US Volume	Average US Daily Volume

July:	22	4,087,831,716	185,810,533

Year-to-Date:	146	29,484,753,900	201,950,369

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.

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:

J.T. Farley

(212) 444-6259

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