(Bloomberg) -- Blackstone Inc. is changing the leadership of a team that buys stakes in other private equity firms. Most Read from BloombergYour 401(k) Will Be Gone Within a DecadeChina Tightens Grip on Stocks With Net Sale Ban at Open, CloseStocks Fall as ‘AI Gold Rush’ Faces Nvidia’s Test: Markets WrapLargest Covid Vaccine Study Yet Finds Links to Health ConditionsCapital One to Buy Discover for $35 Billion in Top 2024 DealExecutives told employees that Mustafa Siddiqui, who led the business,