Joel Greenblatt's position in Pentair plc is currently worth $14.6 Million. That's 0.26% of their equity portfolio (45th largest holding). The first Pentair plc trade was made in Q2 2014. Since then Joel Greenblatt bought shares seventeen more times and sold shares on twenty occasions. The stake costed the investor $9.26 Million, netting the investor a gain of 57% so far.