#3 Overture

Cost: $1.63 billion

Acquisition date: 14 June, 2003

Overture was a company which provided pay for placement search services. Businesses, including some of Yahoo were using Overture’s technology to have their Web addresses displayed at the top of search listings. It was a market kept under close watch by Yahoo’s rival Google.

Finally, Yahoo has acquired the company and renamed it into Yahoo Search Marketing.

Fate: The service is currently a part of Yahoo Marketing Solutions. However, the Overture brand is still used by local businesses in Japan and Korea.

#2 Right Media

Cost: $850 million

Acquisition date: 29 April, 2007

What Happened: Right Media is an online advertising company that operates a marketplace that enables advertisers, publishers, and ad networks to trade digital media. In a move to boost the reach of company’s advertising to social network sites, Yahoo bought Right Media.

 Fate: Right Media has been integrated with Yahoo's offerings to small businesses. It is now a part of Yahoo Marketing Solutions.