Top Mergers and Acquisitions in 2014

#9: Top Mergers and Acquisitions: Facebook Inc (FB) and WhatsApp

Price: $22 billion

Facebook Inc (FB) has a reputation for headline-grabbing acquisitions, but no deal it did in 2014 generated as much heat and light as its purchase of WhatsApp.

The largest-ever purchase of a venture capital-backed firm cost FB $22 billion — up from the $16 billion-price given at the announcement of the deal.

So why did FB take this expensive plunge? As it touted at the time, WhatsApp — a free text message service — is about twice as large by user base as Twitter Inc (TWTR).