The marketing services and online media sectors dominated all the deals, representing 414 transactions valued at $36 billion in total, or 65 percent of all the deals and 38 percent of total deal value. Major buyouts include Microsoft's $5.7 billion acquisition of aQuantive.

"The robust growth in Internet advertising spend has made online ad networks and technology providers attractive growth acquisitions, and a number of them changed hands in 2007," the report stated, according to Media Post.