TechCrunch, which closed in January.

VC firms including Sequoia Capital, Andreessen Horowitz, Thrive and K2 Global are picking up new shares, according to documents seen by TechCrunch.

A source tells us Founders Fund is also investing. Altogether the VCs have put in just over $300 million at a valuation of $27 billion to $29 billion.

This is separate to a big investment from Microsoft announced earlier this year, a person familiar with the development told TechCrunch, which closed in January.

The size of Microsoft’s investment is believed to be around $10 billion, a figure we confirmed with our source.