Jim Simons's position in Tower Semiconductor Ltd. is currently worth $18.2 Million. That's 0.03% of their equity portfolio (645th largest holding). The first Tower Semiconductor Ltd. trade was made in Q2 2013. Since then Jim Simons bought shares 21 more times and sold shares on twenty occasions. The stake costed the investor $14.6 Million, netting the investor a gain of 24% so far.