Jim Simons's position in Exxon Mobil is currently worth $636 Million. That's 0.78% of their equity portfolio (10th largest holding). The first Exxon Mobil trade was made in Q3 2013. Since then Jim Simons bought shares fourteen more times and sold shares on eleven occasions. The stake costed the investor $433 Million, netting the investor a gain of 47% so far.