In May 2010, Google completed its acquisition of mobile advertising company AdMob, pushing search on smartphones and providing a better ad platform for Android.
Price: $750 million in stock
A HIT: AdMob was one of the first companies to serve ads in mobile apps so Google was wise to gobble it up when it did. Many cried monopoly, but when Apple made a similar purchase of mobile ad firm, Quattro, regulators calmed down. In any case, AdMob has done well by Google, as Android’s smartphone market share is now an impressive 50 percent.