Michael Alan Spencer, Baron Spencer of Alresford (born 30 May 1955), sometimes known as "Spens", is a British businessman and philanthropist. He is the founder of NEX Group, a UK-based business focused on electronic markets and post trade business which was acquired by CME Group in November 2018. NEX Group was formerly known as ICAP, until the sale of its voice-broking business to Tullett Prebon in December 2016. Spencer has been described as the richest self-made person in the City of London and as a "City grandee". According to the Sunday Times Rich List in 2020, he is worth an estimated £1.1 billion, a decrease of £50 million from the previous year.. He was award a peerage in August 2020 in the Political Honours List.