Here are Bill Ackman's latest stock moves

Bill Ackman, founder and CEO of Pershing Square Capital Management.
Adam Jeffery | CNBC

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Billionaire investor Bill Ackman's hedge fund exited positions in Berkshire Hathaway and Blackstone Group in the second quarter and made his long portfolio more concentrated, according to a securities filing released Friday. Both of those moves were previously disclosed. 

Here's what else he's doing: