Ken Griffin acquired 657 Thousand Blackstone Mortgage Trust shares worth $12.9 Million. That's 0.01% of their equity portfolio (1061st largest holding). The first Blackstone Mortgage Trust trade was made in Q2 2013. Since then Ken Griffin bought shares 50 more times and sold shares on 50 occasions. The investor's estimated purchase price is $16.3 Million, resulting in a loss of 21%.