Ken Griffin acquired 821 Thousand Rio Tinto plc shares worth $57.3 Million. That's 0.06% of their equity portfolio (393rd largest holding). The first Rio Tinto plc trade was made in Q2 2013. Since then Ken Griffin bought shares 51 more times and sold shares on 51 occasions. The stake costed the investor $53.5 Million, netting the investor a gain of 7.0% so far.