Jim Simons's position in Exxon Mobil Corp. is currently worth $586 Million. That's 0.78% of their equity portfolio (12th largest holding). The first Exxon Mobil Corp. trade was made in Q3 2013. Since then Jim Simons bought shares thirteen more times and sold shares on eleven occasions. The stake costed the investor $463 Million, netting the investor a gain of 27% so far.