Sir William Browder was the largest foreign portfolio investor in Russia until 2005, when he was deemed “a threat to national security” for exposing corruption. In 2008, his lawyer, Sergei Magnitsky, uncovered massive fraud committed by Russian government officials and was subsequently arrested, imprisoned without trial, and tortured. Magnitsky died in prison on Nov. 16, 2009. Since then, Browder has led the Global Magnitsky Campaign to impose targeted visa bans and asset freezes on human rights abusers and highly corrupt officials, introducing the passage of the Sergei Magnitsky Accountability Act in 2012 and the Global Magnitsky Human Rights Accountability Act in 2016.