Facebook buying WhatsApp

|About: Facebook (FB)|By:, SA News Editor

Facebook (FB) is acquiring mobile messaging leader WhatsApp for a whopping $16B in cash and stock.

WhatsApp, long seen as an indirect threat to Facebook's mobile engagement rates, had 430M monthly active users as of last month. Facebook, by comparison, ended Q4 with 1.23B MAUs and 945M mobile MAUs.

FB -3.7% AH.

Update: Facebook states in the PR the deal will also include $3B worth of restricted stock units that vest over four years, leading to a total potential payout of $19B.