6. Kelkoo: $579 million
The 6th most expensive Yahoo acquisition is Kelkoo.
A European price comparison service founded in France in 1999, allowing customers to find information on products they want to purchase, including price and seller information it was bought by Yahoo! in 2004.
It has its base in 10 countries, including UK, France, Spain, Italy, Norway, Sweden, Germany, Denmark, Netherlands, and Belgium.
However, on 21 November 2008, Yahoo gave up the company and sold Kelkoo to Jamplant, a private equity company.
