Jim Simons's position in Exxon Mobil is currently worth $378 Million. That's 0.50% of their equity portfolio (20th 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 thirteen occasions. The stake costed the investor $213 Million, netting the investor a gain of 77% so far.