Jim Simons's position in Rio Tinto plc is currently worth $102M. That's 0.14% of their equity portfolio (158th largest holding). The first Rio Tinto plc trade was made in Q2 2013. Since then Jim Simons bought shares 25 more times and sold shares on eighteen occasions. The stake costed the investor $68.9M, netting the investor a gain of 48% so far.