Andrey Andreev pocketed at least $1.5 billion from Blackstone Group Inc. after selling a stake in a dating apps company.
Even with the delayed IPOs, Ma's fortune is still worth $54 billion.
The Mansours are part of a trend of the world's wealthy rejecting traditional investment intermediaries.
But Barclays' primary focus will be on the U.S. domestic market.
Thomas Faust boasts a 3% stake and stock options in Eaton Vance, which is being bought by Morgan Stanley.
Thomas Healy was trying to turn his truck electrification start-up into a publicly company when coronavirus struck.
Since March, the Done family has doubled its holdings in William Hill to 6%, via a company they control.
Trevor Milton’s net worth has plunged by almost one-third since Friday’s market close.
Cascade Investment owned shares in Arcos Dorados for more than five years.
Switzerland has changed its tax regime but remains an attractive location for multinational firms and wealthy individuals.