Jim Simons's position in Intuitive Surgical is currently worth $52.3 Million. That's 0.08% of their equity portfolio (293rd largest holding). The first Intuitive Surgical trade was made in Q2 2013. Since then Jim Simons bought shares eighteen more times and sold shares on twenty occasions. The stake costed the investor $43.3 Million, netting the investor a gain of 21% so far.