David Einhorn's position in Boston Scientific is currently worth $3.36 Billion. It makes up 151.79% of their stock portfolio and is their biggest holding. The investor owns 2.21% of the outstanding Boston Scientific stock. David Einhorn acquired their 32.7 Million shares in Q4 2009. So far they never sold any shares in the company. The stake costed the investor $288 Million, netting the investor a gain of 1067% so far.