Don't forget IAC (InterActiveCorp), they have been behind many acquisitions in the past several years. Notably: Insider Pages, Expedia, CollegeHumor, Ask.com,

Don't forget IAC (InterActiveCorp), they have been behind many acquisitions in the past several years. Notably: Insider Pages, Expedia, CollegeHumor, Ask.com, Hotwire, LendingTree and many others