Ken Griffin acquired 806 Thousand BlackRock Institutional Trust Company N.A. - iShares National Muni Bond ETF shares worth $85.8 Million. That's 0.09% of their equity portfolio (273rd largest holding). The investor owns 3325.60% of the outstanding BlackRock Institutional Trust Company N.A. - iShares National Muni Bond ETF stock. The first BlackRock Institutional Trust Company N.A. - iShares National Muni Bond ETF trade was made in Q3 2016. Since then Ken Griffin bought shares 36 more times and sold shares on 40 occasions. The stake costed the investor $84.3 Million, netting the investor a gain of 1.8% so far.