It appears the mystery buyer of Salesforce was Microsoft, but the talks have fizzled

We finally know which company was trying to buy Salesforce - it was Microsoft, unnamed sources told CNBC's David Faber.

And although the two companies got pretty far in these talks, the talks are over because the two couldn't agree on a price, Faber reports. Microsoft wanted to pay $55 billion and CEO Marc Benioff kept raising the price, at one point asking $70 billion.

Salesforce's stock has been trading at all time highs. It's now above $75, giving it a market cap of about $50 billion.

Breaking, more to come.