He might not be a household name, but Simon Reuben and his elder brother, David, were recently ranked as Britain's second-richest family by The Sunday Times, with a staggering £16 billion ($21 billion) net worth. While David completed his education, the younger sibling decided school wasn't for him, and went straight to work at 17.
Starting out in scrap metals and carpets, the Reubens were able to begin investing in real estate, before amassing their wealth through commodities. The duo also invested heavily in Russian metals and became the world's third largest producers of aluminium.
Earlier this year, they provided £80 million to the University of Oxford to create a post-graduate college bearing their name, specialising in cell research, artificial intelligence and climate change.