Ken Griffin acquired 299 Thousand Rio Tinto plc - ADR shares worth $21.3 Million. That's 0.02% of their equity portfolio (727th largest holding). The first Rio Tinto plc - ADR trade was made in Q2 2013. Since then Ken Griffin bought shares 45 more times and sold shares on 51 occasions. The stake costed the investor $19.3 Million, netting the investor a gain of 10% so far.