No 8 Palantir, US

The data-analysis startup hasn’t made proper financial disclosures since it started to run in 2004, according to Bloomberg.

Bloomberg said Palantir's early backers include a venture capital arm of the US Central Intelligence Agency, and its customers comprise government spy agencies around the world as well as banks and other businesses.

According to remarks by the startup's CEO Alex Karp to Bloomberg, Palantir will turn profitable in 2017 for the first time as it increased non-governmental customers in recent years.

Currently, the startup's value is $20 billion.