This firm’s software detects and counters cyber-security threats. Founded in 2013, it has joint headquarters in Cambridge in Britain and San Francisco in America, with a further 22 offices globally. In May, its technology protected customers, including an NHS agency, from the WannaCry ransomware attack that hit hospitals. It has raised more than $180m, including $75m (£58m) in July, from investors that include Invoke Capital and Insight Venture Partners. Under chief executive Nicole Eagan, 53, sales hit £31m this year.
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