Nicholas William Leeson (born 25 February 1967) is an English former derivatives trader whose fraudulent, unauthorized and speculative trades resulted in the 1995 collapse of Barings Bank, the United Kingdom's oldest merchant bank, for which he served time in prison for financial crime.

Between 2005 and 2011, Leeson had senior management roles at League of Ireland club Galway United. After it suffered financial difficulties, he resigned from his position as chief executive officer. He is also active on the keynote and after-dinner speaking circuit, where he advises companies about risk and corporate responsibility.



Barings Bank was a British merchant bank based in London, and one of England's oldest merchant banks after Berenberg Bank, Barings' close collaborator and German representative. It was founded in 1762 by Francis Baring, a British-born member of the German-British Baring family of merchants and bankers.The bank collapsed in 1995 after suffering losses of £827 million (£1.6 billion in 2020) resulting from fraudulent investments, primarily in futures contracts, conducted by its employee Nick Leeson, working at its office in Singapore.