Joel Greenblatt acquired 3.62 Thousand OSI Systems shares worth $488 Thousand. That's 0.01% of their equity portfolio (978th largest holding). The first OSI Systems trade was made in Q2 2014. Since then Joel Greenblatt bought shares seventeen more times and sold shares on seventeen occasions. The stake costed the investor $371 Thousand, netting the investor a gain of 31% so far.