Jim Simons's position in Exxon Mobil is currently worth $534 Million. That's 0.82% of their equity portfolio (10th largest holding). The first Exxon Mobil trade was made in Q3 2013. Since then Jim Simons bought shares sixteen more times and sold shares on fifteen occasions. The stake costed the investor $473 Million, netting the investor a gain of 13% so far.