[4] Busson's aunt, Joanna Harcourt-Smith, was a companion of Timothy Leary, who coincidentally was married in the early 1960s to Nena von Schlebrügge, the mother of Arpad's partner Uma Thurman.
In 1991, Busson founded the EIM Group to provide fund-of-fund management services to the growing institutional market for hedge funds.
[11] In November 2001, EIM, an asset management company run by Busson, was asked by the FBI to help trace the finances of al-Qaida.
[13] In December 2013, Busson merged his EIM group with Swiss listed investment company Gottex Fund Management Holdings.
He is a founding trustee of the children's charity ARK (Absolute Return for Kids) and serves as chairman of its board of directors.
ARK raises charitable contributions from the hedge fund industry for children who are victims of abuse, disability, illness and poverty.
[citation needed] ARK finances and manages projects aimed at transforming the lives of children in Eastern Europe, South Africa and the UK through education and healthcare.
[21] The annual Ark Dinner hosted by Busson sees a range of high-profile individuals attend the event to raise money for the charity.
[26] Busson says of ARK, "If we can apply the entrepreneurial principles we have brought to business to charity, we have a shot at having a really strong impact, to be able to transform the lives of children.