There were $3 trillion worth of corporate mergers in 2014. Comcast's proposed acquisition of fellow cable company Time Warner was the largest at $45 billion. Gene J. Puskar/AP hide caption

itoggle caption Gene J. Puskar/AP

Meg Whitman, the current president and CEO of Hewlett-Packard, will lead one of the two companies the tech giant is creating by dividing its corporate services and printing/PC units. Richard Drew/AP hide caption

itoggle caption Richard Drew/AP