most admired companies in the Internet Services & Retailing sector for many years, IAC's family of websites is one of the largest in the world, with over two billion monthly visits reaching users in more than 190 countries. The company is headquartered in the Chelsea neighborhood of New York City and has business operations and satellite offices around the world.

In December 2004, Expedia split from IAC as a separate publicly traded company. In December 2011, TripAdvisor spun out from Expedia.

In August 2008, IAC split into five separate publicly traded companies. The four spun-off companies were HSN, Ticketmaster, Interval Leisure Group, and Tree.com.

IAC's notable acquisitions include:

- 2012: The About Group - 2011: OkCupid - 2011: Meetic - 2006: Connected Ventures, the parent company of CollegeHumor - 2005: Ask Jeeves - 2004: TripAdvisor - 2003: LendingTree and remaining interest in Ticketmaster, Expedia and Hotels.com. - 2002: Expedia - 1999: Match.com - 1998: Citysearch