Ken Griffin acquired 523 Thousand Rio Tinto plc - ADR shares worth $34.8 Million. That's 0.04% of their equity portfolio (574th largest holding). The first Rio Tinto plc - ADR trade was made in Q2 2013. Since then Ken Griffin bought shares 48 more times and sold shares on 51 occasions. The stake costed the investor $33.9 Million, netting the investor a gain of 2.8% so far.