An outsider who arrived in 1997 after modernizing production at Emerson Electric Co. and reviving its Skil Power Tool division, the 59-year-old Davis came to Donnelley expecting to shed distracting businesses.

FORBES: Pressing For Change

Among the current executives to whom Mr. Buffett has referred in emotional terms at least eight times, the one who scored the highest is Danny Goldman, chief financial officer of Iscar, Berkshire's Israeli-based cutting-tool division ("incredible, " wrote Mr. Buffett in his 2009 letter, for example).

WSJ: And Warren Buffett's Successor Is...

The Social Media Brandsphere is a handy tool that breaks down the division of media opportunities for marketing professionals.

FORBES: The Social Media Brandsphere [Infographic]