ITG is headquartered in New York City and has offices in locations including Boston, Los Angeles, Toronto, Chicago, London, Dublin, Tel Aviv, Madrid, Sydney, Hong Kong and Singapore.

[citation needed] The ITG Australia office opened in 1997, giving regional investors POSIT equity crossing.

ITG completed its purchase of Radical Corporation, a provider of direct access trading to the institutional brokerage and hedge fund community, in 2004.

The company moved to increase its transaction cost analysis offering when it acquired Plexus Group from JPMorgan Chase in 2006.

[13] By February 2008, Shaw had reduced its stake, citing satisfaction with ITG's RedSky purchase and an announced $50 million stock repurchase program.