The first BlackRock Institutional Trust Company N.A. - iShares iBonds Mar 2023 Term Corporate ETF trade was made in Q3 2016. Since then Ken Griffin bought shares six more times and sold shares on ten occasions. The investor sold all their shares in Q1 2022 and doesn't own any shares in BlackRock Institutional Trust Company N.A. - iShares iBonds Mar 2023 Term Corporate ETF anymore.