Many billionaires were hit hard when the coronavirus tanked markets in late February and the first half of March. However, their fortunes rebounded with the stock market in recent weeks, despite a historic surge in unemployment. The combined wealth of a select group of US billionaires has surged by US$565 billion, an increase of almost 20 per cent since the start of the pandemic, according to a report by the Institute for Policy Studies. Chuck Collins, who co-authored the “Billionaire Bonanza 2020” report, said: “In a turbulent week in the life of the nation, these statistics remind us that we are more economically and racially divided than at any time in decades.” Collins added: “Our moral, economic and physical health as a society depends on building a post-pandemic economy that works for everyone, not just the billionaire class. Surging billionaire wealth juxtaposed with the suffering and plight of millions undermines the social solidarity required for us to recover together in the years ahead.” 5 Chinese tycoons who lost billions thanks to Covid-19 Here are the increases in 11 US billionaires' wealth between March 18 and June 4, based on figures from the Institute for Policy Studies and net-worth estimates from Forbes . Jeff Bezos, CEO of Amazon Increase: US$36.2 billion Total wealth: US$149 billion Mukesh Ambani, Jeff Bezos … who will be the world’s first trillionaire? Mark Zuckerberg, CEO of Facebook Increase: US$30.1 billion Total wealth: US$84.8 billion Elon Musk, CEO of Tesla and SpaceX Increase: US$14.1 billion Total wealth: US$38.7 billion Sergey Brin, co-founder of Google View this post on Instagram A post shared by Sergey Brin (@sergeybrinofficial) on Apr 19, 2015 at 10:37am PDT Increase: US$13.9 billion Total wealth: US$63 billion Larry Page, co-founder of Google View this post on Instagram A post shared by larry page (@larrypageofficial) on Apr 29, 2015 at 12:03pm PDT Increase: US$13.7 billion Total wealth: US$64.6 billion There are only 6 billionaires in Hollywood – can you guess who? Steve Ballmer, owner of the LA Clippers and former CEO of Microsoft Increase: US$13.3 billion Total wealth: US$66.0 billion MacKenzie Bezos, author and ex-wife of Amazon founder Jeff Bezos Increase: US$12.6 billion Total wealth: US$48.6 billion Michael Bloomberg, majority owner and co-founder of Bloomberg Increase: US$12.1 billion Total wealth: US$60.1 billion The rumours about Bill Gates starting the coronavirus are nuts – here's why Bill Gates, co-founder of Microsoft Increase: US$11.8 billion Total Wealth: US$110 billion Phil Knight, co-founder and chairman of Nike Increase: US$11.6 billion Total wealth: US$41.1 billion Larry Ellison, co-founder, executive chairman and CTO of Oracle Increase: US$8.5 billion Total wealth: US$67.5 billion Want more stories like this? Sign up here . Follow STYLE on Facebook , Instagram , YouTube and Twitter . This article originally appeared on Business Insider .