An early Facebook investor and metals magnate, Alisher Usmanov was hit with U.S., U.K. and EU sanctions in the wake of Russia's invasion of Ukraine. His largest holding is his stake in iron ore and steel giant Metalloinvest. He also owns stakes in Xiaomi and other telecom, mining and media companies. Usmanov sold his 30% stake in Arsenal Football Club for nearly $700 million in cash in 2018. He made his first fortune producing plastic bags, a commodity so scarce in the former Soviet Union that people washed and reused them. <br> Usmanov headed Gazprom Investholding, a subsidiary of state-run conglomerate Gazprom, from 2000 to 2014. An ex-fencer, Usmanov was the president of the International Fencing Federation until 2022. His wife Irina Viner trained many Russian Olympic medal winners in rhythmic gymnastics.