Money raised by the Fortune Forum event in London last week will be shared between the British Red Cross, WaterAid, African Renaissance and the Alliance for a New Humanity.
The event, which described itself as a summit for members of the UK's rich list, is the latest in a series of 'conspicuous philanthropy' events.
In May, children's charity Absolute Return for Kids raised £18m from a celebrity evening, and Elton John's White Tie and Tiara ball raised £5m for the singer's HIV/Aids charity.
The Red Cross used the event to present former US president Bill Clinton with its Humanity Fellowship award in recognition of his humanitarian work. Nelson Mandela is the only previous winner.