A Grizzlies team spokesman has confirmed that Kushner and Brandon Arrindell "recently, in their respective individual capacities" purchased minority stakes in the franchise.
The Grizzlies haven't said how much of a stake they purchased.
Kushner is the younger brother of Jared Kushner, who serves as a senior adviser to Trump.
Joshua Kushner is a venture capitalist who founded the Thrive Capital investment firm.
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