Born in Sudan and now a U.K. citizen, Mohammed (Mo) Ibrahim founded Celtel International, one of the first mobile phone companies serving Africa and the Middle East, and sold it to Kuwait’s Mobile Telecommunications Company for $3.4 billion in 2005 and pocketed $1.4 billion. Since then, he’s focused on fighting corrupt leadership in Africa through the Mo Ibrahim Foundation, directed by his daughter, Hadeel. In March 2015, the foundation awarded its $5 million Ibrahim Prize to Namibia’s outgoing president, Hifikepunye Pohamba. The award, which recognizes good leadership in Africa, has been given out only four times in the 8 years since it was announced. The foundation also publishes the well-known Ibrahim Index of African Governance, which ranks countries by rule of law, economic opportunity and human rights. Ibrahim owns the majority of assets in Satya Capital, which invests in African businesses.