S imon Reuben is a British businessman who, along with his elder brother David Reuben, forms one of the world's most successful and secretive business partnerships. Born in Mumbai, India, to an Iraqi-Jewish family, the brothers moved to London in the 1950s and grew up in modest circumstances. They began their business careers separately, with Simon importing carpets and David trading in scrap metals. In the 1970s and 80s, they combined their efforts and began investing in real estate and metals.

The Reuben brothers made a substantial part of their early fortune in the Russian metals market during the chaotic 1990s, becoming one of the world's largest aluminum traders. After navigating the risky and volatile Russian market, they sold their assets there in 2000 and reinvested the proceeds into more stable, high-quality assets, primarily prime real estate in the UK and globally. Their portfolio now includes iconic London properties, data centers, and luxury hotels. The brothers are famously private and operate through their investment vehicle, Reuben Brothers, controlling a vast and diversified empire built on decades of astute deal-making.