• by Mark Walsh  @markfwal, February 29, 2012

Yammer, which powers social networking services for companies, has raised $85 million in its fifth round of funding, bringing its total financing to $142 million. Draper Fisher Jurvetson led the round with participation from  new investors including Meritech Capital Partners, Capricorn Investment Group and Khosla Ventures.

In less than four years, Yammer says it has attracted over 4 million corporate, including employees at more than 85 percent of the Fortune 500. Last year it tripled sales and headcount. The company will use the latest funding for potential strategic acquisitions as well as for building brand awareness. In that vein, it will launch its first ad campaign on Thursday, with online and print ads highlighting the value of enterprise social networks. Handling the campaign is digital agency MRM.