PRIMECAP Management's position in Boston Scientific is currently worth $2.22B. That's 1.33% of their equity portfolio (18th largest holding). The investor owns 1.26% of the outstanding Boston Scientific stock. The first Boston Scientific trade was made in Q1 2013. Since then PRIMECAP Management bought shares seventeen more times and sold shares on 36 occasions. The stake costed the investor $1.12B, netting the investor a gain of 98% so far.