Ken Griffin acquired 14.3 Million BlackRock Institutional Trust Company N.A. - BTC iShares iBoxx USD Hig shares worth $1.05 Billion. It makes up 1.50% of their stock portfolio and is their biggest holding. The investor owns 21698.36% of the outstanding BlackRock Institutional Trust Company N.A. - BTC iShares iBoxx USD Hig stock. The first BlackRock Institutional Trust Company N.A. - BTC iShares iBoxx USD Hig trade was made in Q1 2014. Since then Ken Griffin bought shares 46 more times and sold shares on 24 occasions. The investor's estimated purchase price is $1.17 Billion, resulting in a loss of 11%.