Experts say family offices now manage $6 trillion or more, and their ranks are growing. According to a new report from Preqin, the number of family offices — the private investing arms of wealthy families — topped 4,500 worldwide last year. North America has the largest share of family offices, with 1,682. Blackstone, KKR and Carlyle have all been expanding their teams, funding events and building products catering specifically to family offices. Now they're more like institutional investors, seeking higher long-term returns with private equity, venture capital, hedge funds, infrastructure and real estate.

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Persons: —, Robert Frank, Carlyle, Rachel Dabora, Craig Russell, Blackstone, Russell Organizations: Blackstone, KKR, Wealth Solutions, Private Capital Group, Blackstone's Private Capital Group Locations: Preqin, America, North America