IAC/InterActiveCorp (IAC) was founded in 1986 as a subsidiary of the Home Shopping Network under the name Silver King Broadcasting Company.
In 1992 Silver King was spun off as a separate publicly-traded company.
The company has changed names several times throughout its history: to USA Networks Inc. in 1998, to USA Interactive in 2002, to InterActiveCorp in 2003, and finally to IAC/InterActiveCorp in 2004.
In 2003 IAC acquired Amway (www.amway.com) for $62.4 million USD.
In 2008 IAC spun off several businesses to separate publicly traded companies, including Tree.com (NASDAQ: TREE), the Home Shopping Network, Ticketmaster, and Interval Leisure Group (NASDAQ: IILG).
In 2011 IAC acquired OkCupid, a dating site.
Also in 2011, IAC extended a deal with Google to hand over all search advertising on Ask.com and other IAC search products until 2016; a deal worth $3.5 billion.
In 2012 IAC acquired About.com from The New York Times.
Today IAC owns the following brands: About.com, Ask.com, Chemistry.com, CityGrid, CollegeHumor media, DailyBurn, Dictionary.com, Felix, HomeAdvisor, Match.com, MeeticGroup, Mindspark, Notional, nRelate, OkCupid, PeopleMedia, Shoebuy.com, The Daily Beast, Tutor.com, Twoo, Urbanspoon, and Vimeo.
IAC has over 4,000 employees and had $2.8 billion in revenue in 2012.