Ken Griffin acquired 56.7 Thousand BlackRock Institutional Trust Company N.A. - iShares Core S&P Mid-Cap ETF shares worth $3.44 Million. That's 0.00% of their equity portfolio (1831st largest holding). The investor owns 131.02% of the outstanding BlackRock Institutional Trust Company N.A. - iShares Core S&P Mid-Cap ETF stock. The first BlackRock Institutional Trust Company N.A. - iShares Core S&P Mid-Cap ETF trade was made in Q3 2014. Since then Ken Griffin bought shares 38 more times and sold shares on 26 occasions. The investor's estimated purchase price is $14.4 Million, resulting in a loss of 76%.