Joel Greenblatt acquired 128 Thousand Masimo shares worth $19.6 Million. That's 0.20% of their equity portfolio (80th largest holding). The first Masimo trade was made in Q3 2011. Since then Joel Greenblatt bought shares 26 more times and sold shares on 25 occasions. The stake costed the investor $13.8 Million, netting the investor a gain of 42% so far.