Cybersecurity artificial intelligence leader Darktrace is to be admitted to the FTSE 250 index with a market capitalisation of more than £4.2 billion.

Since its IPO on 30th April this year, the company has seen its share price rise from 250p to 644p, more than doubling the value of the business in less than four months.

Darktrace, which protects over 5,600 customers worldwide from ransomware, insider threats and cloud attacks, expects revenue to reach $278m this year – a rise of 40% – due to a massive influx of new customers.

Its approach assumes that threats will get inside an organisation, and uses self-learning technology to automatically detect these from within and defend against them.

Another admission to the FTSE 250 is Draper Esprit, a venture capital firm which focuses on high-growth technology businesses.

Its market cap is more than £1.6bn after it transitioned to the premium listing segment of the London Stock Exchange from the AIM. It is also on the secondary listing segment of Euronext Dublin.

Since its IPO in 2016, Draper Esprit has deployed around £550m capital and has a current annual rate of deployment of about £200m, making it one of the most active venture capital firms in Europe.

It is a shareholder in a diverse portfolio of 71 companies, including Graphcore, UiPath, Trustpilot, Aiven, Ledger, Lyst and Cazoo. 

As part of the reshuffle, Trustpilot has moved into the FTSE 250.