Trustpilot Group Plc experienced its worst single-day trading session in history on 4 December, after a short-seller accused the global review platform of operating what it described as a 'mafia-style extortion' scheme.
Shares in the London-listed company tumbled more than 30%, wiping approximately £243 million ($324 million) from its market value and sending the stock to a near two-year low of 131.2 pence, according to Bloomberg.
