Jim Simons acquired 40.7 Thousand Blackrock shares worth $33.4 Million. That's 0.05% of their equity portfolio (421st largest holding). The first Blackrock trade was made in Q4 2013. Since then Jim Simons bought shares fifteen more times and sold shares on thirteen occasions. The stake costed the investor $28.4 Million, netting the investor a gain of 17% so far.