I'm not seeing any recent 13G or 13G/A filings for Blackstone.
I do see one for BlackRock.
Don't get too excited about that, though. BlackRock filed 1800 13G/A forms last week -- so many it brought Edgar to a halt. The reason for all these filings was that they had to update their ownership levels on completion of the acquisition of Barclays. The forms are just a formality. If it was BlackRock that you saw, nothing fundamental has changed except that they now owns Barclays.