"The Hurun Research Institute released the Hurun Global Gazelle Index 2021 on 25 August 2022, a list of the world’s start-ups founded in the 2000s, worth over US$500mn, not yet listed on a public exchange and most likely to ‘go unicorn’, ie hit a valuation of US$1bn, within three years. There are 31 Gazelles in the UK. The cut-off date used was 1 November 2021."