Like many ultra wealthy, Kaplan owns index funds (several of them), and bland blue chips, and not much in hedge funds or exotic holdings. His is a typical portfolio for the rich. Kaplan had been vice-chairman of Goldman Sachs previously. https://www.forexlive.com/centralbank/!/the-feds-kaplan-had-27-individual-stock-holdings-worth-more-than-1-million-each-20210907