Jeremy Grantham acquired 1.14 Million Intuitive Surgical shares worth $424 Million. That's 1.85% of their equity portfolio (19th largest holding). The first Intuitive Surgical trade was made in Q1 2013. Since then Jeremy Grantham bought shares ten more times and sold shares on fourteen occasions. The stake costed the investor $302 Million, netting the investor a gain of 40% so far.